mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40617 91177308-0d34-0410-b5e6-96231b3b80d8
5172 lines
196 KiB
C++
5172 lines
196 KiB
C++
//===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interfaces that X86 uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#include "X86.h"
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#include "X86CodeEmitter.h"
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#include "X86InstrBuilder.h"
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#include "X86ISelLowering.h"
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#include "X86MachineFunctionInfo.h"
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#include "X86TargetMachine.h"
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#include "llvm/CallingConv.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/Function.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/ADT/VectorExtras.h"
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#include "llvm/Analysis/ScalarEvolutionExpressions.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/SSARegMap.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ParameterAttributes.h"
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using namespace llvm;
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X86TargetLowering::X86TargetLowering(TargetMachine &TM)
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: TargetLowering(TM) {
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Subtarget = &TM.getSubtarget<X86Subtarget>();
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X86ScalarSSE = Subtarget->hasSSE2();
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X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
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RegInfo = TM.getRegisterInfo();
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// Set up the TargetLowering object.
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// X86 is weird, it always uses i8 for shift amounts and setcc results.
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setShiftAmountType(MVT::i8);
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setSetCCResultType(MVT::i8);
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setSetCCResultContents(ZeroOrOneSetCCResult);
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setSchedulingPreference(SchedulingForRegPressure);
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setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
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setStackPointerRegisterToSaveRestore(X86StackPtr);
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if (Subtarget->isTargetDarwin()) {
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// Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
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setUseUnderscoreSetJmp(false);
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setUseUnderscoreLongJmp(false);
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} else if (Subtarget->isTargetMingw()) {
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// MS runtime is weird: it exports _setjmp, but longjmp!
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setUseUnderscoreSetJmp(true);
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setUseUnderscoreLongJmp(false);
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} else {
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setUseUnderscoreSetJmp(true);
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setUseUnderscoreLongJmp(true);
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}
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// Set up the register classes.
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addRegisterClass(MVT::i8, X86::GR8RegisterClass);
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addRegisterClass(MVT::i16, X86::GR16RegisterClass);
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addRegisterClass(MVT::i32, X86::GR32RegisterClass);
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if (Subtarget->is64Bit())
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addRegisterClass(MVT::i64, X86::GR64RegisterClass);
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setLoadXAction(ISD::SEXTLOAD, MVT::i1, Expand);
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// Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
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// operation.
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setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
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setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
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setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
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if (Subtarget->is64Bit()) {
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setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
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setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
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} else {
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if (X86ScalarSSE)
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// If SSE i64 SINT_TO_FP is not available, expand i32 UINT_TO_FP.
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setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Expand);
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else
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setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
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}
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// Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
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// this operation.
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setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
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setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
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// SSE has no i16 to fp conversion, only i32
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if (X86ScalarSSE)
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setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
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else {
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setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
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setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
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}
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if (!Subtarget->is64Bit()) {
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// Custom lower SINT_TO_FP and FP_TO_SINT from/to i64 in 32-bit mode.
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setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
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setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
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}
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// Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
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// this operation.
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setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
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setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
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if (X86ScalarSSE) {
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setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
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} else {
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setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
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setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
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}
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// Handle FP_TO_UINT by promoting the destination to a larger signed
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// conversion.
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setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
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setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
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setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
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if (Subtarget->is64Bit()) {
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setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
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setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
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} else {
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if (X86ScalarSSE && !Subtarget->hasSSE3())
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// Expand FP_TO_UINT into a select.
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// FIXME: We would like to use a Custom expander here eventually to do
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// the optimal thing for SSE vs. the default expansion in the legalizer.
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setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
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else
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// With SSE3 we can use fisttpll to convert to a signed i64.
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setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
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}
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// TODO: when we have SSE, these could be more efficient, by using movd/movq.
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if (!X86ScalarSSE) {
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setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
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setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
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}
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setOperationAction(ISD::BR_JT , MVT::Other, Expand);
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setOperationAction(ISD::BRCOND , MVT::Other, Custom);
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setOperationAction(ISD::BR_CC , MVT::Other, Expand);
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setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
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setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
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if (Subtarget->is64Bit())
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
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setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
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setOperationAction(ISD::FREM , MVT::f64 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i8 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i8 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i16 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i16 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i32 , Expand);
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if (Subtarget->is64Bit()) {
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setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
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}
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setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
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setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
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// These should be promoted to a larger select which is supported.
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setOperationAction(ISD::SELECT , MVT::i1 , Promote);
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setOperationAction(ISD::SELECT , MVT::i8 , Promote);
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// X86 wants to expand cmov itself.
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setOperationAction(ISD::SELECT , MVT::i16 , Custom);
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setOperationAction(ISD::SELECT , MVT::i32 , Custom);
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setOperationAction(ISD::SELECT , MVT::f32 , Custom);
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setOperationAction(ISD::SELECT , MVT::f64 , Custom);
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setOperationAction(ISD::SETCC , MVT::i8 , Custom);
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setOperationAction(ISD::SETCC , MVT::i16 , Custom);
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setOperationAction(ISD::SETCC , MVT::i32 , Custom);
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setOperationAction(ISD::SETCC , MVT::f32 , Custom);
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setOperationAction(ISD::SETCC , MVT::f64 , Custom);
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if (Subtarget->is64Bit()) {
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setOperationAction(ISD::SELECT , MVT::i64 , Custom);
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setOperationAction(ISD::SETCC , MVT::i64 , Custom);
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}
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// X86 ret instruction may pop stack.
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setOperationAction(ISD::RET , MVT::Other, Custom);
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if (!Subtarget->is64Bit())
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setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
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// Darwin ABI issue.
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setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
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setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
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setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
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setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
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setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
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if (Subtarget->is64Bit()) {
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setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
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setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
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setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
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setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
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}
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// 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
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setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
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setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
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setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
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// X86 wants to expand memset / memcpy itself.
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setOperationAction(ISD::MEMSET , MVT::Other, Custom);
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setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
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// We don't have line number support yet.
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setOperationAction(ISD::LOCATION, MVT::Other, Expand);
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setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
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// FIXME - use subtarget debug flags
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if (!Subtarget->isTargetDarwin() &&
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!Subtarget->isTargetELF() &&
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!Subtarget->isTargetCygMing())
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setOperationAction(ISD::LABEL, MVT::Other, Expand);
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setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
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setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
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setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
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setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
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if (Subtarget->is64Bit()) {
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// FIXME: Verify
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setExceptionPointerRegister(X86::RAX);
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setExceptionSelectorRegister(X86::RDX);
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} else {
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setExceptionPointerRegister(X86::EAX);
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setExceptionSelectorRegister(X86::EDX);
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}
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setOperationAction(ISD::ADJUST_TRAMP, MVT::i32, Expand);
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setOperationAction(ISD::ADJUST_TRAMP, MVT::i64, Expand);
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setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
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// VASTART needs to be custom lowered to use the VarArgsFrameIndex
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setOperationAction(ISD::VASTART , MVT::Other, Custom);
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setOperationAction(ISD::VAARG , MVT::Other, Expand);
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setOperationAction(ISD::VAEND , MVT::Other, Expand);
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if (Subtarget->is64Bit())
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setOperationAction(ISD::VACOPY , MVT::Other, Custom);
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else
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setOperationAction(ISD::VACOPY , MVT::Other, Expand);
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setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
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setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
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if (Subtarget->is64Bit())
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setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
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if (Subtarget->isTargetCygMing())
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setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
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else
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setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
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if (X86ScalarSSE) {
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// Set up the FP register classes.
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addRegisterClass(MVT::f32, X86::FR32RegisterClass);
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addRegisterClass(MVT::f64, X86::FR64RegisterClass);
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// Use ANDPD to simulate FABS.
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setOperationAction(ISD::FABS , MVT::f64, Custom);
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setOperationAction(ISD::FABS , MVT::f32, Custom);
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// Use XORP to simulate FNEG.
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setOperationAction(ISD::FNEG , MVT::f64, Custom);
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setOperationAction(ISD::FNEG , MVT::f32, Custom);
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// Use ANDPD and ORPD to simulate FCOPYSIGN.
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setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
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setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
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// We don't support sin/cos/fmod
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setOperationAction(ISD::FSIN , MVT::f64, Expand);
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setOperationAction(ISD::FCOS , MVT::f64, Expand);
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setOperationAction(ISD::FREM , MVT::f64, Expand);
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setOperationAction(ISD::FSIN , MVT::f32, Expand);
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setOperationAction(ISD::FCOS , MVT::f32, Expand);
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setOperationAction(ISD::FREM , MVT::f32, Expand);
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// Expand FP immediates into loads from the stack, except for the special
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// cases we handle.
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setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
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setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
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addLegalFPImmediate(+0.0); // xorps / xorpd
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} else {
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// Set up the FP register classes.
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addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
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addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
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setOperationAction(ISD::UNDEF, MVT::f64, Expand);
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setOperationAction(ISD::UNDEF, MVT::f32, Expand);
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setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
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setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
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setOperationAction(ISD::FP_ROUND, MVT::f32, Expand);
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if (!UnsafeFPMath) {
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setOperationAction(ISD::FSIN , MVT::f64 , Expand);
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setOperationAction(ISD::FCOS , MVT::f64 , Expand);
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}
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setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
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setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
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addLegalFPImmediate(+0.0); // FLD0
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addLegalFPImmediate(+1.0); // FLD1
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addLegalFPImmediate(-0.0); // FLD0/FCHS
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addLegalFPImmediate(-1.0); // FLD1/FCHS
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}
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// First set operation action for all vector types to expand. Then we
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// will selectively turn on ones that can be effectively codegen'd.
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for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
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VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
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setOperationAction(ISD::ADD , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::SUB , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FADD, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FNEG, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FSUB, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::MUL , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FMUL, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::SDIV, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::UDIV, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FDIV, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::SREM, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::UREM, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FABS, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FSIN, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FCOS, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FREM, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FPOWI, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FSQRT, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::FCOPYSIGN, (MVT::ValueType)VT, Expand);
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}
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if (Subtarget->hasMMX()) {
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addRegisterClass(MVT::v8i8, X86::VR64RegisterClass);
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addRegisterClass(MVT::v4i16, X86::VR64RegisterClass);
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addRegisterClass(MVT::v2i32, X86::VR64RegisterClass);
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addRegisterClass(MVT::v1i64, X86::VR64RegisterClass);
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// FIXME: add MMX packed arithmetics
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setOperationAction(ISD::ADD, MVT::v8i8, Legal);
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setOperationAction(ISD::ADD, MVT::v4i16, Legal);
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setOperationAction(ISD::ADD, MVT::v2i32, Legal);
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setOperationAction(ISD::ADD, MVT::v1i64, Legal);
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setOperationAction(ISD::SUB, MVT::v8i8, Legal);
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setOperationAction(ISD::SUB, MVT::v4i16, Legal);
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setOperationAction(ISD::SUB, MVT::v2i32, Legal);
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setOperationAction(ISD::MULHS, MVT::v4i16, Legal);
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setOperationAction(ISD::MUL, MVT::v4i16, Legal);
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setOperationAction(ISD::AND, MVT::v8i8, Promote);
|
|
AddPromotedToType (ISD::AND, MVT::v8i8, MVT::v1i64);
|
|
setOperationAction(ISD::AND, MVT::v4i16, Promote);
|
|
AddPromotedToType (ISD::AND, MVT::v4i16, MVT::v1i64);
|
|
setOperationAction(ISD::AND, MVT::v2i32, Promote);
|
|
AddPromotedToType (ISD::AND, MVT::v2i32, MVT::v1i64);
|
|
setOperationAction(ISD::AND, MVT::v1i64, Legal);
|
|
|
|
setOperationAction(ISD::OR, MVT::v8i8, Promote);
|
|
AddPromotedToType (ISD::OR, MVT::v8i8, MVT::v1i64);
|
|
setOperationAction(ISD::OR, MVT::v4i16, Promote);
|
|
AddPromotedToType (ISD::OR, MVT::v4i16, MVT::v1i64);
|
|
setOperationAction(ISD::OR, MVT::v2i32, Promote);
|
|
AddPromotedToType (ISD::OR, MVT::v2i32, MVT::v1i64);
|
|
setOperationAction(ISD::OR, MVT::v1i64, Legal);
|
|
|
|
setOperationAction(ISD::XOR, MVT::v8i8, Promote);
|
|
AddPromotedToType (ISD::XOR, MVT::v8i8, MVT::v1i64);
|
|
setOperationAction(ISD::XOR, MVT::v4i16, Promote);
|
|
AddPromotedToType (ISD::XOR, MVT::v4i16, MVT::v1i64);
|
|
setOperationAction(ISD::XOR, MVT::v2i32, Promote);
|
|
AddPromotedToType (ISD::XOR, MVT::v2i32, MVT::v1i64);
|
|
setOperationAction(ISD::XOR, MVT::v1i64, Legal);
|
|
|
|
setOperationAction(ISD::LOAD, MVT::v8i8, Promote);
|
|
AddPromotedToType (ISD::LOAD, MVT::v8i8, MVT::v1i64);
|
|
setOperationAction(ISD::LOAD, MVT::v4i16, Promote);
|
|
AddPromotedToType (ISD::LOAD, MVT::v4i16, MVT::v1i64);
|
|
setOperationAction(ISD::LOAD, MVT::v2i32, Promote);
|
|
AddPromotedToType (ISD::LOAD, MVT::v2i32, MVT::v1i64);
|
|
setOperationAction(ISD::LOAD, MVT::v1i64, Legal);
|
|
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Custom);
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Custom);
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Custom);
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v1i64, Custom);
|
|
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i32, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1i64, Custom);
|
|
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Custom);
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Custom);
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Custom);
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Custom);
|
|
}
|
|
|
|
if (Subtarget->hasSSE1()) {
|
|
addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
|
|
|
|
setOperationAction(ISD::FADD, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
|
|
setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
|
|
setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
|
|
setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
|
|
}
|
|
|
|
if (Subtarget->hasSSE2()) {
|
|
addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
|
|
addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
|
|
addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
|
|
addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
|
|
addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
|
|
|
|
setOperationAction(ISD::ADD, MVT::v16i8, Legal);
|
|
setOperationAction(ISD::ADD, MVT::v8i16, Legal);
|
|
setOperationAction(ISD::ADD, MVT::v4i32, Legal);
|
|
setOperationAction(ISD::ADD, MVT::v2i64, Legal);
|
|
setOperationAction(ISD::SUB, MVT::v16i8, Legal);
|
|
setOperationAction(ISD::SUB, MVT::v8i16, Legal);
|
|
setOperationAction(ISD::SUB, MVT::v4i32, Legal);
|
|
setOperationAction(ISD::SUB, MVT::v2i64, Legal);
|
|
setOperationAction(ISD::MUL, MVT::v8i16, Legal);
|
|
setOperationAction(ISD::FADD, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
|
|
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
|
|
setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
|
|
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
|
|
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
|
|
// Implement v4f32 insert_vector_elt in terms of SSE2 v8i16 ones.
|
|
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
|
|
|
|
// Custom lower build_vector, vector_shuffle, and extract_vector_elt.
|
|
for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
|
|
setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Custom);
|
|
setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
|
|
}
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
|
|
setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
|
|
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
|
|
setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
|
|
setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
|
|
|
|
// Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
|
|
for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
|
|
setOperationAction(ISD::AND, (MVT::ValueType)VT, Promote);
|
|
AddPromotedToType (ISD::AND, (MVT::ValueType)VT, MVT::v2i64);
|
|
setOperationAction(ISD::OR, (MVT::ValueType)VT, Promote);
|
|
AddPromotedToType (ISD::OR, (MVT::ValueType)VT, MVT::v2i64);
|
|
setOperationAction(ISD::XOR, (MVT::ValueType)VT, Promote);
|
|
AddPromotedToType (ISD::XOR, (MVT::ValueType)VT, MVT::v2i64);
|
|
setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Promote);
|
|
AddPromotedToType (ISD::LOAD, (MVT::ValueType)VT, MVT::v2i64);
|
|
setOperationAction(ISD::SELECT, (MVT::ValueType)VT, Promote);
|
|
AddPromotedToType (ISD::SELECT, (MVT::ValueType)VT, MVT::v2i64);
|
|
}
|
|
|
|
// Custom lower v2i64 and v2f64 selects.
|
|
setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
|
|
setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
|
|
setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
|
|
setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
|
|
}
|
|
|
|
// We want to custom lower some of our intrinsics.
|
|
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
|
|
|
|
// We have target-specific dag combine patterns for the following nodes:
|
|
setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
|
|
setTargetDAGCombine(ISD::SELECT);
|
|
|
|
computeRegisterProperties();
|
|
|
|
// FIXME: These should be based on subtarget info. Plus, the values should
|
|
// be smaller when we are in optimizing for size mode.
|
|
maxStoresPerMemset = 16; // For %llvm.memset -> sequence of stores
|
|
maxStoresPerMemcpy = 16; // For %llvm.memcpy -> sequence of stores
|
|
maxStoresPerMemmove = 16; // For %llvm.memmove -> sequence of stores
|
|
allowUnalignedMemoryAccesses = true; // x86 supports it!
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Return Value Calling Convention Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86GenCallingConv.inc"
|
|
|
|
/// LowerRET - Lower an ISD::RET node.
|
|
SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
|
|
assert((Op.getNumOperands() & 1) == 1 && "ISD::RET should have odd # args");
|
|
|
|
SmallVector<CCValAssign, 16> RVLocs;
|
|
unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
|
|
bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
|
|
CCState CCInfo(CC, isVarArg, getTargetMachine(), RVLocs);
|
|
CCInfo.AnalyzeReturn(Op.Val, RetCC_X86);
|
|
|
|
|
|
// If this is the first return lowered for this function, add the regs to the
|
|
// liveout set for the function.
|
|
if (DAG.getMachineFunction().liveout_empty()) {
|
|
for (unsigned i = 0; i != RVLocs.size(); ++i)
|
|
if (RVLocs[i].isRegLoc())
|
|
DAG.getMachineFunction().addLiveOut(RVLocs[i].getLocReg());
|
|
}
|
|
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand Flag;
|
|
|
|
// Copy the result values into the output registers.
|
|
if (RVLocs.size() != 1 || !RVLocs[0].isRegLoc() ||
|
|
RVLocs[0].getLocReg() != X86::ST0) {
|
|
for (unsigned i = 0; i != RVLocs.size(); ++i) {
|
|
CCValAssign &VA = RVLocs[i];
|
|
assert(VA.isRegLoc() && "Can only return in registers!");
|
|
Chain = DAG.getCopyToReg(Chain, VA.getLocReg(), Op.getOperand(i*2+1),
|
|
Flag);
|
|
Flag = Chain.getValue(1);
|
|
}
|
|
} else {
|
|
// We need to handle a destination of ST0 specially, because it isn't really
|
|
// a register.
|
|
SDOperand Value = Op.getOperand(1);
|
|
|
|
// If this is an FP return with ScalarSSE, we need to move the value from
|
|
// an XMM register onto the fp-stack.
|
|
if (X86ScalarSSE) {
|
|
SDOperand MemLoc;
|
|
|
|
// If this is a load into a scalarsse value, don't store the loaded value
|
|
// back to the stack, only to reload it: just replace the scalar-sse load.
|
|
if (ISD::isNON_EXTLoad(Value.Val) &&
|
|
(Chain == Value.getValue(1) || Chain == Value.getOperand(0))) {
|
|
Chain = Value.getOperand(0);
|
|
MemLoc = Value.getOperand(1);
|
|
} else {
|
|
// Spill the value to memory and reload it into top of stack.
|
|
unsigned Size = MVT::getSizeInBits(RVLocs[0].getValVT())/8;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
|
|
MemLoc = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Chain = DAG.getStore(Op.getOperand(0), Value, MemLoc, NULL, 0);
|
|
}
|
|
SDVTList Tys = DAG.getVTList(RVLocs[0].getValVT(), MVT::Other);
|
|
SDOperand Ops[] = {Chain, MemLoc, DAG.getValueType(RVLocs[0].getValVT())};
|
|
Value = DAG.getNode(X86ISD::FLD, Tys, Ops, 3);
|
|
Chain = Value.getValue(1);
|
|
}
|
|
|
|
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SDOperand Ops[] = { Chain, Value };
|
|
Chain = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops, 2);
|
|
Flag = Chain.getValue(1);
|
|
}
|
|
|
|
SDOperand BytesToPop = DAG.getConstant(getBytesToPopOnReturn(), MVT::i16);
|
|
if (Flag.Val)
|
|
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Chain, BytesToPop, Flag);
|
|
else
|
|
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Chain, BytesToPop);
|
|
}
|
|
|
|
|
|
/// LowerCallResult - Lower the result values of an ISD::CALL into the
|
|
/// appropriate copies out of appropriate physical registers. This assumes that
|
|
/// Chain/InFlag are the input chain/flag to use, and that TheCall is the call
|
|
/// being lowered. The returns a SDNode with the same number of values as the
|
|
/// ISD::CALL.
|
|
SDNode *X86TargetLowering::
|
|
LowerCallResult(SDOperand Chain, SDOperand InFlag, SDNode *TheCall,
|
|
unsigned CallingConv, SelectionDAG &DAG) {
|
|
|
|
// Assign locations to each value returned by this call.
|
|
SmallVector<CCValAssign, 16> RVLocs;
|
|
bool isVarArg = cast<ConstantSDNode>(TheCall->getOperand(2))->getValue() != 0;
|
|
CCState CCInfo(CallingConv, isVarArg, getTargetMachine(), RVLocs);
|
|
CCInfo.AnalyzeCallResult(TheCall, RetCC_X86);
|
|
|
|
|
|
SmallVector<SDOperand, 8> ResultVals;
|
|
|
|
// Copy all of the result registers out of their specified physreg.
|
|
if (RVLocs.size() != 1 || RVLocs[0].getLocReg() != X86::ST0) {
|
|
for (unsigned i = 0; i != RVLocs.size(); ++i) {
|
|
Chain = DAG.getCopyFromReg(Chain, RVLocs[i].getLocReg(),
|
|
RVLocs[i].getValVT(), InFlag).getValue(1);
|
|
InFlag = Chain.getValue(2);
|
|
ResultVals.push_back(Chain.getValue(0));
|
|
}
|
|
} else {
|
|
// Copies from the FP stack are special, as ST0 isn't a valid register
|
|
// before the fp stackifier runs.
|
|
|
|
// Copy ST0 into an RFP register with FP_GET_RESULT.
|
|
SDVTList Tys = DAG.getVTList(RVLocs[0].getValVT(), MVT::Other, MVT::Flag);
|
|
SDOperand GROps[] = { Chain, InFlag };
|
|
SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, GROps, 2);
|
|
Chain = RetVal.getValue(1);
|
|
InFlag = RetVal.getValue(2);
|
|
|
|
// If we are using ScalarSSE, store ST(0) to the stack and reload it into
|
|
// an XMM register.
|
|
if (X86ScalarSSE) {
|
|
// FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
|
|
// shouldn't be necessary except that RFP cannot be live across
|
|
// multiple blocks. When stackifier is fixed, they can be uncoupled.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
SDOperand Ops[] = {
|
|
Chain, RetVal, StackSlot, DAG.getValueType(RVLocs[0].getValVT()), InFlag
|
|
};
|
|
Chain = DAG.getNode(X86ISD::FST, MVT::Other, Ops, 5);
|
|
RetVal = DAG.getLoad(RVLocs[0].getValVT(), Chain, StackSlot, NULL, 0);
|
|
Chain = RetVal.getValue(1);
|
|
}
|
|
ResultVals.push_back(RetVal);
|
|
}
|
|
|
|
// Merge everything together with a MERGE_VALUES node.
|
|
ResultVals.push_back(Chain);
|
|
return DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(),
|
|
&ResultVals[0], ResultVals.size()).Val;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// C & StdCall Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
// StdCall calling convention seems to be standard for many Windows' API
|
|
// routines and around. It differs from C calling convention just a little:
|
|
// callee should clean up the stack, not caller. Symbols should be also
|
|
// decorated in some fancy way :) It doesn't support any vector arguments.
|
|
|
|
/// AddLiveIn - This helper function adds the specified physical register to the
|
|
/// MachineFunction as a live in value. It also creates a corresponding virtual
|
|
/// register for it.
|
|
static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
|
|
const TargetRegisterClass *RC) {
|
|
assert(RC->contains(PReg) && "Not the correct regclass!");
|
|
unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
|
|
MF.addLiveIn(PReg, VReg);
|
|
return VReg;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerCCCArguments(SDOperand Op, SelectionDAG &DAG,
|
|
bool isStdCall) {
|
|
unsigned NumArgs = Op.Val->getNumValues() - 1;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
SDOperand Root = Op.getOperand(0);
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
|
|
// Assign locations to all of the incoming arguments.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(MF.getFunction()->getCallingConv(), isVarArg,
|
|
getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeFormalArguments(Op.Val, CC_X86_32_C);
|
|
|
|
SmallVector<SDOperand, 8> ArgValues;
|
|
unsigned LastVal = ~0U;
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
// TODO: If an arg is passed in two places (e.g. reg and stack), skip later
|
|
// places.
|
|
assert(VA.getValNo() != LastVal &&
|
|
"Don't support value assigned to multiple locs yet");
|
|
LastVal = VA.getValNo();
|
|
|
|
if (VA.isRegLoc()) {
|
|
MVT::ValueType RegVT = VA.getLocVT();
|
|
TargetRegisterClass *RC;
|
|
if (RegVT == MVT::i32)
|
|
RC = X86::GR32RegisterClass;
|
|
else {
|
|
assert(MVT::isVector(RegVT));
|
|
RC = X86::VR128RegisterClass;
|
|
}
|
|
|
|
unsigned Reg = AddLiveIn(DAG.getMachineFunction(), VA.getLocReg(), RC);
|
|
SDOperand ArgValue = DAG.getCopyFromReg(Root, Reg, RegVT);
|
|
|
|
// If this is an 8 or 16-bit value, it is really passed promoted to 32
|
|
// bits. Insert an assert[sz]ext to capture this, then truncate to the
|
|
// right size.
|
|
if (VA.getLocInfo() == CCValAssign::SExt)
|
|
ArgValue = DAG.getNode(ISD::AssertSext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
else if (VA.getLocInfo() == CCValAssign::ZExt)
|
|
ArgValue = DAG.getNode(ISD::AssertZext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
|
|
if (VA.getLocInfo() != CCValAssign::Full)
|
|
ArgValue = DAG.getNode(ISD::TRUNCATE, VA.getValVT(), ArgValue);
|
|
|
|
ArgValues.push_back(ArgValue);
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
|
|
// Create the nodes corresponding to a load from this parameter slot.
|
|
int FI = MFI->CreateFixedObject(MVT::getSizeInBits(VA.getValVT())/8,
|
|
VA.getLocMemOffset());
|
|
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
|
|
ArgValues.push_back(DAG.getLoad(VA.getValVT(), Root, FIN, NULL, 0));
|
|
}
|
|
}
|
|
|
|
unsigned StackSize = CCInfo.getNextStackOffset();
|
|
|
|
ArgValues.push_back(Root);
|
|
|
|
// If the function takes variable number of arguments, make a frame index for
|
|
// the start of the first vararg value... for expansion of llvm.va_start.
|
|
if (isVarArg)
|
|
VarArgsFrameIndex = MFI->CreateFixedObject(1, StackSize);
|
|
|
|
if (isStdCall && !isVarArg) {
|
|
BytesToPopOnReturn = StackSize; // Callee pops everything..
|
|
BytesCallerReserves = 0;
|
|
} else {
|
|
BytesToPopOnReturn = 0; // Callee pops nothing.
|
|
|
|
// If this is an sret function, the return should pop the hidden pointer.
|
|
if (NumArgs &&
|
|
(cast<ConstantSDNode>(Op.getOperand(3))->getValue() &
|
|
ISD::ParamFlags::StructReturn))
|
|
BytesToPopOnReturn = 4;
|
|
|
|
BytesCallerReserves = StackSize;
|
|
}
|
|
|
|
RegSaveFrameIndex = 0xAAAAAAA; // X86-64 only.
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
|
|
MF.getInfo<X86MachineFunctionInfo>()
|
|
->setBytesToPopOnReturn(BytesToPopOnReturn);
|
|
|
|
// Return the new list of results.
|
|
return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(),
|
|
&ArgValues[0], ArgValues.size()).getValue(Op.ResNo);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerCCCCallTo(SDOperand Op, SelectionDAG &DAG,
|
|
unsigned CC) {
|
|
SDOperand Chain = Op.getOperand(0);
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
|
|
SDOperand Callee = Op.getOperand(4);
|
|
unsigned NumOps = (Op.getNumOperands() - 5) / 2;
|
|
|
|
// Analyze operands of the call, assigning locations to each operand.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeCallOperands(Op.Val, CC_X86_32_C);
|
|
|
|
// Get a count of how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = CCInfo.getNextStackOffset();
|
|
|
|
Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
|
|
SmallVector<SDOperand, 8> MemOpChains;
|
|
|
|
SDOperand StackPtr;
|
|
|
|
// Walk the register/memloc assignments, inserting copies/loads.
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
|
|
|
|
// Promote the value if needed.
|
|
switch (VA.getLocInfo()) {
|
|
default: assert(0 && "Unknown loc info!");
|
|
case CCValAssign::Full: break;
|
|
case CCValAssign::SExt:
|
|
Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::ZExt:
|
|
Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::AExt:
|
|
Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
}
|
|
|
|
if (VA.isRegLoc()) {
|
|
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
if (StackPtr.Val == 0)
|
|
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
|
|
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
|
|
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
|
|
}
|
|
}
|
|
|
|
// If the first argument is an sret pointer, remember it.
|
|
bool isSRet = NumOps &&
|
|
(cast<ConstantSDNode>(Op.getOperand(6))->getValue() &
|
|
ISD::ParamFlags::StructReturn);
|
|
|
|
if (!MemOpChains.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&MemOpChains[0], MemOpChains.size());
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token chain
|
|
// and flag operands which copy the outgoing args into registers.
|
|
SDOperand InFlag;
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Chain = DAG.getCopyToReg(Chain, RegsToPass[i].first, RegsToPass[i].second,
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
// ELF / PIC requires GOT in the EBX register before function calls via PLT
|
|
// GOT pointer.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
Subtarget->isPICStyleGOT()) {
|
|
Chain = DAG.getCopyToReg(Chain, X86::EBX,
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
// If the callee is a GlobalAddress node (quite common, every direct call is)
|
|
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
|
|
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
|
|
// We should use extra load for direct calls to dllimported functions in
|
|
// non-JIT mode.
|
|
if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
|
|
getTargetMachine(), true))
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
|
|
} else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
|
|
|
|
// Returns a chain & a flag for retval copy to use.
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
|
|
// Add argument registers to the end of the list so that they are known live
|
|
// into the call.
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
|
|
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
|
|
RegsToPass[i].second.getValueType()));
|
|
|
|
// Add an implicit use GOT pointer in EBX.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
Subtarget->isPICStyleGOT())
|
|
Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
|
|
|
|
if (InFlag.Val)
|
|
Ops.push_back(InFlag);
|
|
|
|
Chain = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Create the CALLSEQ_END node.
|
|
unsigned NumBytesForCalleeToPush = 0;
|
|
|
|
if (CC == CallingConv::X86_StdCall) {
|
|
if (isVarArg)
|
|
NumBytesForCalleeToPush = isSRet ? 4 : 0;
|
|
else
|
|
NumBytesForCalleeToPush = NumBytes;
|
|
} else {
|
|
// If this is is a call to a struct-return function, the callee
|
|
// pops the hidden struct pointer, so we have to push it back.
|
|
// This is common for Darwin/X86, Linux & Mingw32 targets.
|
|
NumBytesForCalleeToPush = isSRet ? 4 : 0;
|
|
}
|
|
|
|
NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(NumBytesForCalleeToPush, getPointerTy()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Handle result values, copying them out of physregs into vregs that we
|
|
// return.
|
|
return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// FastCall Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The X86 'fastcall' calling convention passes up to two integer arguments in
|
|
// registers (an appropriate portion of ECX/EDX), passes arguments in C order,
|
|
// and requires that the callee pop its arguments off the stack (allowing proper
|
|
// tail calls), and has the same return value conventions as C calling convs.
|
|
//
|
|
// This calling convention always arranges for the callee pop value to be 8n+4
|
|
// bytes, which is needed for tail recursion elimination and stack alignment
|
|
// reasons.
|
|
SDOperand
|
|
X86TargetLowering::LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG) {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
SDOperand Root = Op.getOperand(0);
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
|
|
// Assign locations to all of the incoming arguments.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(MF.getFunction()->getCallingConv(), isVarArg,
|
|
getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeFormalArguments(Op.Val, CC_X86_32_FastCall);
|
|
|
|
SmallVector<SDOperand, 8> ArgValues;
|
|
unsigned LastVal = ~0U;
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
// TODO: If an arg is passed in two places (e.g. reg and stack), skip later
|
|
// places.
|
|
assert(VA.getValNo() != LastVal &&
|
|
"Don't support value assigned to multiple locs yet");
|
|
LastVal = VA.getValNo();
|
|
|
|
if (VA.isRegLoc()) {
|
|
MVT::ValueType RegVT = VA.getLocVT();
|
|
TargetRegisterClass *RC;
|
|
if (RegVT == MVT::i32)
|
|
RC = X86::GR32RegisterClass;
|
|
else {
|
|
assert(MVT::isVector(RegVT));
|
|
RC = X86::VR128RegisterClass;
|
|
}
|
|
|
|
unsigned Reg = AddLiveIn(DAG.getMachineFunction(), VA.getLocReg(), RC);
|
|
SDOperand ArgValue = DAG.getCopyFromReg(Root, Reg, RegVT);
|
|
|
|
// If this is an 8 or 16-bit value, it is really passed promoted to 32
|
|
// bits. Insert an assert[sz]ext to capture this, then truncate to the
|
|
// right size.
|
|
if (VA.getLocInfo() == CCValAssign::SExt)
|
|
ArgValue = DAG.getNode(ISD::AssertSext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
else if (VA.getLocInfo() == CCValAssign::ZExt)
|
|
ArgValue = DAG.getNode(ISD::AssertZext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
|
|
if (VA.getLocInfo() != CCValAssign::Full)
|
|
ArgValue = DAG.getNode(ISD::TRUNCATE, VA.getValVT(), ArgValue);
|
|
|
|
ArgValues.push_back(ArgValue);
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
|
|
// Create the nodes corresponding to a load from this parameter slot.
|
|
int FI = MFI->CreateFixedObject(MVT::getSizeInBits(VA.getValVT())/8,
|
|
VA.getLocMemOffset());
|
|
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
|
|
ArgValues.push_back(DAG.getLoad(VA.getValVT(), Root, FIN, NULL, 0));
|
|
}
|
|
}
|
|
|
|
ArgValues.push_back(Root);
|
|
|
|
unsigned StackSize = CCInfo.getNextStackOffset();
|
|
|
|
if (!Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows()) {
|
|
// Make sure the instruction takes 8n+4 bytes to make sure the start of the
|
|
// arguments and the arguments after the retaddr has been pushed are aligned.
|
|
if ((StackSize & 7) == 0)
|
|
StackSize += 4;
|
|
}
|
|
|
|
VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
|
|
RegSaveFrameIndex = 0xAAAAAAA; // X86-64 only.
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = StackSize; // Callee pops all stack arguments.
|
|
BytesCallerReserves = 0;
|
|
|
|
MF.getInfo<X86MachineFunctionInfo>()
|
|
->setBytesToPopOnReturn(BytesToPopOnReturn);
|
|
|
|
// Return the new list of results.
|
|
return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(),
|
|
&ArgValues[0], ArgValues.size()).getValue(Op.ResNo);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
|
|
unsigned CC) {
|
|
SDOperand Chain = Op.getOperand(0);
|
|
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
SDOperand Callee = Op.getOperand(4);
|
|
|
|
// Analyze operands of the call, assigning locations to each operand.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeCallOperands(Op.Val, CC_X86_32_FastCall);
|
|
|
|
// Get a count of how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = CCInfo.getNextStackOffset();
|
|
|
|
if (!Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows()) {
|
|
// Make sure the instruction takes 8n+4 bytes to make sure the start of the
|
|
// arguments and the arguments after the retaddr has been pushed are aligned.
|
|
if ((NumBytes & 7) == 0)
|
|
NumBytes += 4;
|
|
}
|
|
|
|
Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
|
|
SmallVector<SDOperand, 8> MemOpChains;
|
|
|
|
SDOperand StackPtr;
|
|
|
|
// Walk the register/memloc assignments, inserting copies/loads.
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
|
|
|
|
// Promote the value if needed.
|
|
switch (VA.getLocInfo()) {
|
|
default: assert(0 && "Unknown loc info!");
|
|
case CCValAssign::Full: break;
|
|
case CCValAssign::SExt:
|
|
Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::ZExt:
|
|
Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::AExt:
|
|
Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
}
|
|
|
|
if (VA.isRegLoc()) {
|
|
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
if (StackPtr.Val == 0)
|
|
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
|
|
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
|
|
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
|
|
}
|
|
}
|
|
|
|
if (!MemOpChains.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&MemOpChains[0], MemOpChains.size());
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token chain
|
|
// and flag operands which copy the outgoing args into registers.
|
|
SDOperand InFlag;
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Chain = DAG.getCopyToReg(Chain, RegsToPass[i].first, RegsToPass[i].second,
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
// If the callee is a GlobalAddress node (quite common, every direct call is)
|
|
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
|
|
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
|
|
// We should use extra load for direct calls to dllimported functions in
|
|
// non-JIT mode.
|
|
if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
|
|
getTargetMachine(), true))
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
|
|
} else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
|
|
|
|
// ELF / PIC requires GOT in the EBX register before function calls via PLT
|
|
// GOT pointer.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
Subtarget->isPICStyleGOT()) {
|
|
Chain = DAG.getCopyToReg(Chain, X86::EBX,
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
// Returns a chain & a flag for retval copy to use.
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
|
|
// Add argument registers to the end of the list so that they are known live
|
|
// into the call.
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
|
|
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
|
|
RegsToPass[i].second.getValueType()));
|
|
|
|
// Add an implicit use GOT pointer in EBX.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
Subtarget->isPICStyleGOT())
|
|
Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
|
|
|
|
if (InFlag.Val)
|
|
Ops.push_back(InFlag);
|
|
|
|
// FIXME: Do not generate X86ISD::TAILCALL for now.
|
|
Chain = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Returns a flag for retval copy to use.
|
|
NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Handle result values, copying them out of physregs into vregs that we
|
|
// return.
|
|
return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86-64 C Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerX86_64CCCArguments(SDOperand Op, SelectionDAG &DAG) {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
SDOperand Root = Op.getOperand(0);
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
|
|
static const unsigned GPR64ArgRegs[] = {
|
|
X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
|
|
};
|
|
static const unsigned XMMArgRegs[] = {
|
|
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
|
|
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
|
|
};
|
|
|
|
|
|
// Assign locations to all of the incoming arguments.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(MF.getFunction()->getCallingConv(), isVarArg,
|
|
getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeFormalArguments(Op.Val, CC_X86_64_C);
|
|
|
|
SmallVector<SDOperand, 8> ArgValues;
|
|
unsigned LastVal = ~0U;
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
// TODO: If an arg is passed in two places (e.g. reg and stack), skip later
|
|
// places.
|
|
assert(VA.getValNo() != LastVal &&
|
|
"Don't support value assigned to multiple locs yet");
|
|
LastVal = VA.getValNo();
|
|
|
|
if (VA.isRegLoc()) {
|
|
MVT::ValueType RegVT = VA.getLocVT();
|
|
TargetRegisterClass *RC;
|
|
if (RegVT == MVT::i32)
|
|
RC = X86::GR32RegisterClass;
|
|
else if (RegVT == MVT::i64)
|
|
RC = X86::GR64RegisterClass;
|
|
else if (RegVT == MVT::f32)
|
|
RC = X86::FR32RegisterClass;
|
|
else if (RegVT == MVT::f64)
|
|
RC = X86::FR64RegisterClass;
|
|
else {
|
|
assert(MVT::isVector(RegVT));
|
|
if (MVT::getSizeInBits(RegVT) == 64) {
|
|
RC = X86::GR64RegisterClass; // MMX values are passed in GPRs.
|
|
RegVT = MVT::i64;
|
|
} else
|
|
RC = X86::VR128RegisterClass;
|
|
}
|
|
|
|
unsigned Reg = AddLiveIn(DAG.getMachineFunction(), VA.getLocReg(), RC);
|
|
SDOperand ArgValue = DAG.getCopyFromReg(Root, Reg, RegVT);
|
|
|
|
// If this is an 8 or 16-bit value, it is really passed promoted to 32
|
|
// bits. Insert an assert[sz]ext to capture this, then truncate to the
|
|
// right size.
|
|
if (VA.getLocInfo() == CCValAssign::SExt)
|
|
ArgValue = DAG.getNode(ISD::AssertSext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
else if (VA.getLocInfo() == CCValAssign::ZExt)
|
|
ArgValue = DAG.getNode(ISD::AssertZext, RegVT, ArgValue,
|
|
DAG.getValueType(VA.getValVT()));
|
|
|
|
if (VA.getLocInfo() != CCValAssign::Full)
|
|
ArgValue = DAG.getNode(ISD::TRUNCATE, VA.getValVT(), ArgValue);
|
|
|
|
// Handle MMX values passed in GPRs.
|
|
if (RegVT != VA.getLocVT() && RC == X86::GR64RegisterClass &&
|
|
MVT::getSizeInBits(RegVT) == 64)
|
|
ArgValue = DAG.getNode(ISD::BIT_CONVERT, VA.getLocVT(), ArgValue);
|
|
|
|
ArgValues.push_back(ArgValue);
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
|
|
// Create the nodes corresponding to a load from this parameter slot.
|
|
int FI = MFI->CreateFixedObject(MVT::getSizeInBits(VA.getValVT())/8,
|
|
VA.getLocMemOffset());
|
|
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
|
|
ArgValues.push_back(DAG.getLoad(VA.getValVT(), Root, FIN, NULL, 0));
|
|
}
|
|
}
|
|
|
|
unsigned StackSize = CCInfo.getNextStackOffset();
|
|
|
|
// If the function takes variable number of arguments, make a frame index for
|
|
// the start of the first vararg value... for expansion of llvm.va_start.
|
|
if (isVarArg) {
|
|
unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs, 6);
|
|
unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
|
|
|
|
// For X86-64, if there are vararg parameters that are passed via
|
|
// registers, then we must store them to their spots on the stack so they
|
|
// may be loaded by deferencing the result of va_next.
|
|
VarArgsGPOffset = NumIntRegs * 8;
|
|
VarArgsFPOffset = 6 * 8 + NumXMMRegs * 16;
|
|
VarArgsFrameIndex = MFI->CreateFixedObject(1, StackSize);
|
|
RegSaveFrameIndex = MFI->CreateStackObject(6 * 8 + 8 * 16, 16);
|
|
|
|
// Store the integer parameter registers.
|
|
SmallVector<SDOperand, 8> MemOps;
|
|
SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
|
|
SDOperand FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
|
|
DAG.getConstant(VarArgsGPOffset, getPointerTy()));
|
|
for (; NumIntRegs != 6; ++NumIntRegs) {
|
|
unsigned VReg = AddLiveIn(MF, GPR64ArgRegs[NumIntRegs],
|
|
X86::GR64RegisterClass);
|
|
SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::i64);
|
|
SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
|
|
MemOps.push_back(Store);
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
|
|
DAG.getConstant(8, getPointerTy()));
|
|
}
|
|
|
|
// Now store the XMM (fp + vector) parameter registers.
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
|
|
DAG.getConstant(VarArgsFPOffset, getPointerTy()));
|
|
for (; NumXMMRegs != 8; ++NumXMMRegs) {
|
|
unsigned VReg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
|
|
X86::VR128RegisterClass);
|
|
SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::v4f32);
|
|
SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
|
|
MemOps.push_back(Store);
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
|
|
DAG.getConstant(16, getPointerTy()));
|
|
}
|
|
if (!MemOps.empty())
|
|
Root = DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&MemOps[0], MemOps.size());
|
|
}
|
|
|
|
ArgValues.push_back(Root);
|
|
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = 0; // Callee pops nothing.
|
|
BytesCallerReserves = StackSize;
|
|
|
|
// Return the new list of results.
|
|
return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(),
|
|
&ArgValues[0], ArgValues.size()).getValue(Op.ResNo);
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerX86_64CCCCallTo(SDOperand Op, SelectionDAG &DAG,
|
|
unsigned CC) {
|
|
SDOperand Chain = Op.getOperand(0);
|
|
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
|
|
bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
|
|
SDOperand Callee = Op.getOperand(4);
|
|
|
|
// Analyze operands of the call, assigning locations to each operand.
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
|
|
CCInfo.AnalyzeCallOperands(Op.Val, CC_X86_64_C);
|
|
|
|
// Get a count of how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = CCInfo.getNextStackOffset();
|
|
Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
|
|
SmallVector<SDOperand, 8> MemOpChains;
|
|
|
|
SDOperand StackPtr;
|
|
|
|
// Walk the register/memloc assignments, inserting copies/loads.
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
CCValAssign &VA = ArgLocs[i];
|
|
SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
|
|
|
|
// Promote the value if needed.
|
|
switch (VA.getLocInfo()) {
|
|
default: assert(0 && "Unknown loc info!");
|
|
case CCValAssign::Full: break;
|
|
case CCValAssign::SExt:
|
|
Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::ZExt:
|
|
Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
case CCValAssign::AExt:
|
|
Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
|
|
break;
|
|
}
|
|
|
|
if (VA.isRegLoc()) {
|
|
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
|
|
} else {
|
|
assert(VA.isMemLoc());
|
|
if (StackPtr.Val == 0)
|
|
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
|
|
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
|
|
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
|
|
}
|
|
}
|
|
|
|
if (!MemOpChains.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
|
|
&MemOpChains[0], MemOpChains.size());
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token chain
|
|
// and flag operands which copy the outgoing args into registers.
|
|
SDOperand InFlag;
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
Chain = DAG.getCopyToReg(Chain, RegsToPass[i].first, RegsToPass[i].second,
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
if (isVarArg) {
|
|
// From AMD64 ABI document:
|
|
// For calls that may call functions that use varargs or stdargs
|
|
// (prototype-less calls or calls to functions containing ellipsis (...) in
|
|
// the declaration) %al is used as hidden argument to specify the number
|
|
// of SSE registers used. The contents of %al do not need to match exactly
|
|
// the number of registers, but must be an ubound on the number of SSE
|
|
// registers used and is in the range 0 - 8 inclusive.
|
|
|
|
// Count the number of XMM registers allocated.
|
|
static const unsigned XMMArgRegs[] = {
|
|
X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
|
|
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
|
|
};
|
|
unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
|
|
|
|
Chain = DAG.getCopyToReg(Chain, X86::AL,
|
|
DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
// If the callee is a GlobalAddress node (quite common, every direct call is)
|
|
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
|
|
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
|
|
// We should use extra load for direct calls to dllimported functions in
|
|
// non-JIT mode.
|
|
if (getTargetMachine().getCodeModel() != CodeModel::Large
|
|
&& !Subtarget->GVRequiresExtraLoad(G->getGlobal(),
|
|
getTargetMachine(), true))
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
|
|
} else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
|
|
if (getTargetMachine().getCodeModel() != CodeModel::Large)
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
|
|
|
|
// Returns a chain & a flag for retval copy to use.
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
|
|
// Add argument registers to the end of the list so that they are known live
|
|
// into the call.
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
|
|
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
|
|
RegsToPass[i].second.getValueType()));
|
|
|
|
if (InFlag.Val)
|
|
Ops.push_back(InFlag);
|
|
|
|
// FIXME: Do not generate X86ISD::TAILCALL for now.
|
|
Chain = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Returns a flag for retval copy to use.
|
|
NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(0, getPointerTy()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// Handle result values, copying them out of physregs into vregs that we
|
|
// return.
|
|
return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Other Lowering Hooks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
|
|
if (ReturnAddrIndex == 0) {
|
|
// Set up a frame object for the return address.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
if (Subtarget->is64Bit())
|
|
ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(8, -8);
|
|
else
|
|
ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(4, -4);
|
|
}
|
|
|
|
return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
|
|
}
|
|
|
|
|
|
|
|
/// translateX86CC - do a one to one translation of a ISD::CondCode to the X86
|
|
/// specific condition code. It returns a false if it cannot do a direct
|
|
/// translation. X86CC is the translated CondCode. LHS/RHS are modified as
|
|
/// needed.
|
|
static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
|
|
unsigned &X86CC, SDOperand &LHS, SDOperand &RHS,
|
|
SelectionDAG &DAG) {
|
|
X86CC = X86::COND_INVALID;
|
|
if (!isFP) {
|
|
if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
|
|
if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
|
|
// X > -1 -> X == 0, jump !sign.
|
|
RHS = DAG.getConstant(0, RHS.getValueType());
|
|
X86CC = X86::COND_NS;
|
|
return true;
|
|
} else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
|
|
// X < 0 -> X == 0, jump on sign.
|
|
X86CC = X86::COND_S;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
switch (SetCCOpcode) {
|
|
default: break;
|
|
case ISD::SETEQ: X86CC = X86::COND_E; break;
|
|
case ISD::SETGT: X86CC = X86::COND_G; break;
|
|
case ISD::SETGE: X86CC = X86::COND_GE; break;
|
|
case ISD::SETLT: X86CC = X86::COND_L; break;
|
|
case ISD::SETLE: X86CC = X86::COND_LE; break;
|
|
case ISD::SETNE: X86CC = X86::COND_NE; break;
|
|
case ISD::SETULT: X86CC = X86::COND_B; break;
|
|
case ISD::SETUGT: X86CC = X86::COND_A; break;
|
|
case ISD::SETULE: X86CC = X86::COND_BE; break;
|
|
case ISD::SETUGE: X86CC = X86::COND_AE; break;
|
|
}
|
|
} else {
|
|
// On a floating point condition, the flags are set as follows:
|
|
// ZF PF CF op
|
|
// 0 | 0 | 0 | X > Y
|
|
// 0 | 0 | 1 | X < Y
|
|
// 1 | 0 | 0 | X == Y
|
|
// 1 | 1 | 1 | unordered
|
|
bool Flip = false;
|
|
switch (SetCCOpcode) {
|
|
default: break;
|
|
case ISD::SETUEQ:
|
|
case ISD::SETEQ: X86CC = X86::COND_E; break;
|
|
case ISD::SETOLT: Flip = true; // Fallthrough
|
|
case ISD::SETOGT:
|
|
case ISD::SETGT: X86CC = X86::COND_A; break;
|
|
case ISD::SETOLE: Flip = true; // Fallthrough
|
|
case ISD::SETOGE:
|
|
case ISD::SETGE: X86CC = X86::COND_AE; break;
|
|
case ISD::SETUGT: Flip = true; // Fallthrough
|
|
case ISD::SETULT:
|
|
case ISD::SETLT: X86CC = X86::COND_B; break;
|
|
case ISD::SETUGE: Flip = true; // Fallthrough
|
|
case ISD::SETULE:
|
|
case ISD::SETLE: X86CC = X86::COND_BE; break;
|
|
case ISD::SETONE:
|
|
case ISD::SETNE: X86CC = X86::COND_NE; break;
|
|
case ISD::SETUO: X86CC = X86::COND_P; break;
|
|
case ISD::SETO: X86CC = X86::COND_NP; break;
|
|
}
|
|
if (Flip)
|
|
std::swap(LHS, RHS);
|
|
}
|
|
|
|
return X86CC != X86::COND_INVALID;
|
|
}
|
|
|
|
/// hasFPCMov - is there a floating point cmov for the specific X86 condition
|
|
/// code. Current x86 isa includes the following FP cmov instructions:
|
|
/// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
|
|
static bool hasFPCMov(unsigned X86CC) {
|
|
switch (X86CC) {
|
|
default:
|
|
return false;
|
|
case X86::COND_B:
|
|
case X86::COND_BE:
|
|
case X86::COND_E:
|
|
case X86::COND_P:
|
|
case X86::COND_A:
|
|
case X86::COND_AE:
|
|
case X86::COND_NE:
|
|
case X86::COND_NP:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
|
|
/// true if Op is undef or if its value falls within the specified range (L, H].
|
|
static bool isUndefOrInRange(SDOperand Op, unsigned Low, unsigned Hi) {
|
|
if (Op.getOpcode() == ISD::UNDEF)
|
|
return true;
|
|
|
|
unsigned Val = cast<ConstantSDNode>(Op)->getValue();
|
|
return (Val >= Low && Val < Hi);
|
|
}
|
|
|
|
/// isUndefOrEqual - Op is either an undef node or a ConstantSDNode. Return
|
|
/// true if Op is undef or if its value equal to the specified value.
|
|
static bool isUndefOrEqual(SDOperand Op, unsigned Val) {
|
|
if (Op.getOpcode() == ISD::UNDEF)
|
|
return true;
|
|
return cast<ConstantSDNode>(Op)->getValue() == Val;
|
|
}
|
|
|
|
/// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFD.
|
|
bool X86::isPSHUFDMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Check if the value doesn't reference the second vector.
|
|
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (cast<ConstantSDNode>(Arg)->getValue() >= 4)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFHW.
|
|
bool X86::isPSHUFHWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Lower quadword copied in order.
|
|
for (unsigned i = 0; i != 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (cast<ConstantSDNode>(Arg)->getValue() != i)
|
|
return false;
|
|
}
|
|
|
|
// Upper quadword shuffled.
|
|
for (unsigned i = 4; i != 8; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < 4 || Val > 7)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFLW.
|
|
bool X86::isPSHUFLWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Upper quadword copied in order.
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
// Lower quadword shuffled.
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
if (!isUndefOrInRange(N->getOperand(i), 0, 4))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to SHUFP*.
|
|
static bool isSHUFPMask(const SDOperand *Elems, unsigned NumElems) {
|
|
if (NumElems != 2 && NumElems != 4) return false;
|
|
|
|
unsigned Half = NumElems / 2;
|
|
for (unsigned i = 0; i < Half; ++i)
|
|
if (!isUndefOrInRange(Elems[i], 0, NumElems))
|
|
return false;
|
|
for (unsigned i = Half; i < NumElems; ++i)
|
|
if (!isUndefOrInRange(Elems[i], NumElems, NumElems*2))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isSHUFPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return ::isSHUFPMask(N->op_begin(), N->getNumOperands());
|
|
}
|
|
|
|
/// isCommutedSHUFP - Returns true if the shuffle mask is exactly
|
|
/// the reverse of what x86 shuffles want. x86 shuffles requires the lower
|
|
/// half elements to come from vector 1 (which would equal the dest.) and
|
|
/// the upper half to come from vector 2.
|
|
static bool isCommutedSHUFP(const SDOperand *Ops, unsigned NumOps) {
|
|
if (NumOps != 2 && NumOps != 4) return false;
|
|
|
|
unsigned Half = NumOps / 2;
|
|
for (unsigned i = 0; i < Half; ++i)
|
|
if (!isUndefOrInRange(Ops[i], NumOps, NumOps*2))
|
|
return false;
|
|
for (unsigned i = Half; i < NumOps; ++i)
|
|
if (!isUndefOrInRange(Ops[i], 0, NumOps))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static bool isCommutedSHUFP(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return isCommutedSHUFP(N->op_begin(), N->getNumOperands());
|
|
}
|
|
|
|
/// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVHLPS.
|
|
bool X86::isMOVHLPSMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
|
|
return isUndefOrEqual(N->getOperand(0), 6) &&
|
|
isUndefOrEqual(N->getOperand(1), 7) &&
|
|
isUndefOrEqual(N->getOperand(2), 2) &&
|
|
isUndefOrEqual(N->getOperand(3), 3);
|
|
}
|
|
|
|
/// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
|
|
/// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
|
|
/// <2, 3, 2, 3>
|
|
bool X86::isMOVHLPS_v_undef_Mask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect bit0 == 2, bit1 == 3, bit2 == 2, bit3 == 3
|
|
return isUndefOrEqual(N->getOperand(0), 2) &&
|
|
isUndefOrEqual(N->getOperand(1), 3) &&
|
|
isUndefOrEqual(N->getOperand(2), 2) &&
|
|
isUndefOrEqual(N->getOperand(3), 3);
|
|
}
|
|
|
|
/// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
|
|
bool X86::isMOVLPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i + NumElems))
|
|
return false;
|
|
|
|
for (unsigned i = NumElems/2; i < NumElems; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
|
|
/// and MOVLHPS.
|
|
bool X86::isMOVHPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i) {
|
|
SDOperand Arg = N->getOperand(i + NumElems/2);
|
|
if (!isUndefOrEqual(Arg, i + NumElems))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to UNPCKL.
|
|
bool static isUNPCKLMask(const SDOperand *Elts, unsigned NumElts,
|
|
bool V2IsSplat = false) {
|
|
if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
|
|
SDOperand BitI = Elts[i];
|
|
SDOperand BitI1 = Elts[i+1];
|
|
if (!isUndefOrEqual(BitI, j))
|
|
return false;
|
|
if (V2IsSplat) {
|
|
if (isUndefOrEqual(BitI1, NumElts))
|
|
return false;
|
|
} else {
|
|
if (!isUndefOrEqual(BitI1, j + NumElts))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isUNPCKLMask(SDNode *N, bool V2IsSplat) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return ::isUNPCKLMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
|
|
}
|
|
|
|
/// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to UNPCKH.
|
|
bool static isUNPCKHMask(const SDOperand *Elts, unsigned NumElts,
|
|
bool V2IsSplat = false) {
|
|
if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
|
|
SDOperand BitI = Elts[i];
|
|
SDOperand BitI1 = Elts[i+1];
|
|
if (!isUndefOrEqual(BitI, j + NumElts/2))
|
|
return false;
|
|
if (V2IsSplat) {
|
|
if (isUndefOrEqual(BitI1, NumElts))
|
|
return false;
|
|
} else {
|
|
if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isUNPCKHMask(SDNode *N, bool V2IsSplat) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return ::isUNPCKHMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
|
|
}
|
|
|
|
/// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
|
|
/// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
|
|
/// <0, 0, 1, 1>
|
|
bool X86::isUNPCKL_v_undef_Mask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
|
|
SDOperand BitI = N->getOperand(i);
|
|
SDOperand BitI1 = N->getOperand(i+1);
|
|
|
|
if (!isUndefOrEqual(BitI, j))
|
|
return false;
|
|
if (!isUndefOrEqual(BitI1, j))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
|
|
/// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
|
|
/// <2, 2, 3, 3>
|
|
bool X86::isUNPCKH_v_undef_Mask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
|
|
SDOperand BitI = N->getOperand(i);
|
|
SDOperand BitI1 = N->getOperand(i + 1);
|
|
|
|
if (!isUndefOrEqual(BitI, j))
|
|
return false;
|
|
if (!isUndefOrEqual(BitI1, j))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSS,
|
|
/// MOVSD, and MOVD, i.e. setting the lowest element.
|
|
static bool isMOVLMask(const SDOperand *Elts, unsigned NumElts) {
|
|
if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
|
|
return false;
|
|
|
|
if (!isUndefOrEqual(Elts[0], NumElts))
|
|
return false;
|
|
|
|
for (unsigned i = 1; i < NumElts; ++i) {
|
|
if (!isUndefOrEqual(Elts[i], i))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isMOVLMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return ::isMOVLMask(N->op_begin(), N->getNumOperands());
|
|
}
|
|
|
|
/// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
|
|
/// of what x86 movss want. X86 movs requires the lowest element to be lowest
|
|
/// element of vector 2 and the other elements to come from vector 1 in order.
|
|
static bool isCommutedMOVL(const SDOperand *Ops, unsigned NumOps,
|
|
bool V2IsSplat = false,
|
|
bool V2IsUndef = false) {
|
|
if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
|
|
return false;
|
|
|
|
if (!isUndefOrEqual(Ops[0], 0))
|
|
return false;
|
|
|
|
for (unsigned i = 1; i < NumOps; ++i) {
|
|
SDOperand Arg = Ops[i];
|
|
if (!(isUndefOrEqual(Arg, i+NumOps) ||
|
|
(V2IsUndef && isUndefOrInRange(Arg, NumOps, NumOps*2)) ||
|
|
(V2IsSplat && isUndefOrEqual(Arg, NumOps))))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool isCommutedMOVL(SDNode *N, bool V2IsSplat = false,
|
|
bool V2IsUndef = false) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
return isCommutedMOVL(N->op_begin(), N->getNumOperands(),
|
|
V2IsSplat, V2IsUndef);
|
|
}
|
|
|
|
/// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
|
|
bool X86::isMOVSHDUPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect 1, 1, 3, 3
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 1) return false;
|
|
}
|
|
|
|
bool HasHi = false;
|
|
for (unsigned i = 2; i < 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 3) return false;
|
|
HasHi = true;
|
|
}
|
|
|
|
// Don't use movshdup if it can be done with a shufps.
|
|
return HasHi;
|
|
}
|
|
|
|
/// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
|
|
bool X86::isMOVSLDUPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect 0, 0, 2, 2
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 0) return false;
|
|
}
|
|
|
|
bool HasHi = false;
|
|
for (unsigned i = 2; i < 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 2) return false;
|
|
HasHi = true;
|
|
}
|
|
|
|
// Don't use movshdup if it can be done with a shufps.
|
|
return HasHi;
|
|
}
|
|
|
|
/// isIdentityMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a identity operation on the LHS or RHS.
|
|
static bool isIdentityMask(SDNode *N, bool RHS = false) {
|
|
unsigned NumElems = N->getNumOperands();
|
|
for (unsigned i = 0; i < NumElems; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i + (RHS ? NumElems : 0)))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
|
|
/// a splat of a single element.
|
|
static bool isSplatMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
// This is a splat operation if each element of the permute is the same, and
|
|
// if the value doesn't reference the second vector.
|
|
unsigned NumElems = N->getNumOperands();
|
|
SDOperand ElementBase;
|
|
unsigned i = 0;
|
|
for (; i != NumElems; ++i) {
|
|
SDOperand Elt = N->getOperand(i);
|
|
if (isa<ConstantSDNode>(Elt)) {
|
|
ElementBase = Elt;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!ElementBase.Val)
|
|
return false;
|
|
|
|
for (; i != NumElems; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (Arg != ElementBase) return false;
|
|
}
|
|
|
|
// Make sure it is a splat of the first vector operand.
|
|
return cast<ConstantSDNode>(ElementBase)->getValue() < NumElems;
|
|
}
|
|
|
|
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
|
|
/// a splat of a single element and it's a 2 or 4 element mask.
|
|
bool X86::isSplatMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
// We can only splat 64-bit, and 32-bit quantities with a single instruction.
|
|
if (N->getNumOperands() != 4 && N->getNumOperands() != 2)
|
|
return false;
|
|
return ::isSplatMask(N);
|
|
}
|
|
|
|
/// isSplatLoMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a splat of zero element.
|
|
bool X86::isSplatLoMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), 0))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
|
|
/// instructions.
|
|
unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
|
|
unsigned NumOperands = N->getNumOperands();
|
|
unsigned Shift = (NumOperands == 4) ? 2 : 1;
|
|
unsigned Mask = 0;
|
|
for (unsigned i = 0; i < NumOperands; ++i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(NumOperands-i-1);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val >= NumOperands) Val -= NumOperands;
|
|
Mask |= Val;
|
|
if (i != NumOperands - 1)
|
|
Mask <<= Shift;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
|
|
/// instructions.
|
|
unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
|
|
unsigned Mask = 0;
|
|
// 8 nodes, but we only care about the last 4.
|
|
for (unsigned i = 7; i >= 4; --i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
Mask |= (Val - 4);
|
|
if (i != 4)
|
|
Mask <<= 2;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
|
|
/// instructions.
|
|
unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
|
|
unsigned Mask = 0;
|
|
// 8 nodes, but we only care about the first 4.
|
|
for (int i = 3; i >= 0; --i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
Mask |= Val;
|
|
if (i != 0)
|
|
Mask <<= 2;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// isPSHUFHW_PSHUFLWMask - true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a 8 element shuffle that can be broken into a pair of
|
|
/// PSHUFHW and PSHUFLW.
|
|
static bool isPSHUFHW_PSHUFLWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Lower quadword shuffled.
|
|
for (unsigned i = 0; i != 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val > 4)
|
|
return false;
|
|
}
|
|
|
|
// Upper quadword shuffled.
|
|
for (unsigned i = 4; i != 8; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < 4 || Val > 7)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// CommuteVectorShuffle - Swap vector_shuffle operandsas well as
|
|
/// values in ther permute mask.
|
|
static SDOperand CommuteVectorShuffle(SDOperand Op, SDOperand &V1,
|
|
SDOperand &V2, SDOperand &Mask,
|
|
SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType MaskVT = Mask.getValueType();
|
|
MVT::ValueType EltVT = MVT::getVectorElementType(MaskVT);
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) {
|
|
MaskVec.push_back(DAG.getNode(ISD::UNDEF, EltVT));
|
|
continue;
|
|
}
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < NumElems)
|
|
MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
|
|
}
|
|
|
|
std::swap(V1, V2);
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
}
|
|
|
|
/// ShouldXformToMOVHLPS - Return true if the node should be transformed to
|
|
/// match movhlps. The lower half elements should come from upper half of
|
|
/// V1 (and in order), and the upper half elements should come from the upper
|
|
/// half of V2 (and in order).
|
|
static bool ShouldXformToMOVHLPS(SDNode *Mask) {
|
|
unsigned NumElems = Mask->getNumOperands();
|
|
if (NumElems != 4)
|
|
return false;
|
|
for (unsigned i = 0, e = 2; i != e; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+2))
|
|
return false;
|
|
for (unsigned i = 2; i != 4; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+4))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isScalarLoadToVector - Returns true if the node is a scalar load that
|
|
/// is promoted to a vector.
|
|
static inline bool isScalarLoadToVector(SDNode *N) {
|
|
if (N->getOpcode() == ISD::SCALAR_TO_VECTOR) {
|
|
N = N->getOperand(0).Val;
|
|
return ISD::isNON_EXTLoad(N);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
|
|
/// match movlp{s|d}. The lower half elements should come from lower half of
|
|
/// V1 (and in order), and the upper half elements should come from the upper
|
|
/// half of V2 (and in order). And since V1 will become the source of the
|
|
/// MOVLP, it must be either a vector load or a scalar load to vector.
|
|
static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2, SDNode *Mask) {
|
|
if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
|
|
return false;
|
|
// Is V2 is a vector load, don't do this transformation. We will try to use
|
|
// load folding shufps op.
|
|
if (ISD::isNON_EXTLoad(V2))
|
|
return false;
|
|
|
|
unsigned NumElems = Mask->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
for (unsigned i = 0, e = NumElems/2; i != e; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i))
|
|
return false;
|
|
for (unsigned i = NumElems/2; i != NumElems; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+NumElems))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
|
|
/// all the same.
|
|
static bool isSplatVector(SDNode *N) {
|
|
if (N->getOpcode() != ISD::BUILD_VECTOR)
|
|
return false;
|
|
|
|
SDOperand SplatValue = N->getOperand(0);
|
|
for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
|
|
if (N->getOperand(i) != SplatValue)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isUndefShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
|
|
/// to an undef.
|
|
static bool isUndefShuffle(SDNode *N) {
|
|
if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
|
|
return false;
|
|
|
|
SDOperand V1 = N->getOperand(0);
|
|
SDOperand V2 = N->getOperand(1);
|
|
SDOperand Mask = N->getOperand(2);
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF) {
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < NumElems && V1.getOpcode() != ISD::UNDEF)
|
|
return false;
|
|
else if (Val >= NumElems && V2.getOpcode() != ISD::UNDEF)
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// isZeroNode - Returns true if Elt is a constant zero or a floating point
|
|
/// constant +0.0.
|
|
static inline bool isZeroNode(SDOperand Elt) {
|
|
return ((isa<ConstantSDNode>(Elt) &&
|
|
cast<ConstantSDNode>(Elt)->getValue() == 0) ||
|
|
(isa<ConstantFPSDNode>(Elt) &&
|
|
cast<ConstantFPSDNode>(Elt)->isExactlyValue(0.0)));
|
|
}
|
|
|
|
/// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
|
|
/// to an zero vector.
|
|
static bool isZeroShuffle(SDNode *N) {
|
|
if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
|
|
return false;
|
|
|
|
SDOperand V1 = N->getOperand(0);
|
|
SDOperand V2 = N->getOperand(1);
|
|
SDOperand Mask = N->getOperand(2);
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF) {
|
|
unsigned Idx = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Idx < NumElems) {
|
|
unsigned Opc = V1.Val->getOpcode();
|
|
if (Opc == ISD::UNDEF)
|
|
continue;
|
|
if (Opc != ISD::BUILD_VECTOR ||
|
|
!isZeroNode(V1.Val->getOperand(Idx)))
|
|
return false;
|
|
} else if (Idx >= NumElems) {
|
|
unsigned Opc = V2.Val->getOpcode();
|
|
if (Opc == ISD::UNDEF)
|
|
continue;
|
|
if (Opc != ISD::BUILD_VECTOR ||
|
|
!isZeroNode(V2.Val->getOperand(Idx - NumElems)))
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// getZeroVector - Returns a vector of specified type with all zero elements.
|
|
///
|
|
static SDOperand getZeroVector(MVT::ValueType VT, SelectionDAG &DAG) {
|
|
assert(MVT::isVector(VT) && "Expected a vector type");
|
|
unsigned NumElems = MVT::getVectorNumElements(VT);
|
|
MVT::ValueType EVT = MVT::getVectorElementType(VT);
|
|
bool isFP = MVT::isFloatingPoint(EVT);
|
|
SDOperand Zero = isFP ? DAG.getConstantFP(0.0, EVT) : DAG.getConstant(0, EVT);
|
|
SmallVector<SDOperand, 8> ZeroVec(NumElems, Zero);
|
|
return DAG.getNode(ISD::BUILD_VECTOR, VT, &ZeroVec[0], ZeroVec.size());
|
|
}
|
|
|
|
/// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
|
|
/// that point to V2 points to its first element.
|
|
static SDOperand NormalizeMask(SDOperand Mask, SelectionDAG &DAG) {
|
|
assert(Mask.getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
bool Changed = false;
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF) {
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val > NumElems) {
|
|
Arg = DAG.getConstant(NumElems, Arg.getValueType());
|
|
Changed = true;
|
|
}
|
|
}
|
|
MaskVec.push_back(Arg);
|
|
}
|
|
|
|
if (Changed)
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, Mask.getValueType(),
|
|
&MaskVec[0], MaskVec.size());
|
|
return Mask;
|
|
}
|
|
|
|
/// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
|
|
/// operation of specified width.
|
|
static SDOperand getMOVLMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
|
|
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
MaskVec.push_back(DAG.getConstant(NumElems, BaseVT));
|
|
for (unsigned i = 1; i != NumElems; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
|
|
}
|
|
|
|
/// getUnpacklMask - Returns a vector_shuffle mask for an unpackl operation
|
|
/// of specified width.
|
|
static SDOperand getUnpacklMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
MaskVec.push_back(DAG.getConstant(i + NumElems, BaseVT));
|
|
}
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
|
|
}
|
|
|
|
/// getUnpackhMask - Returns a vector_shuffle mask for an unpackh operation
|
|
/// of specified width.
|
|
static SDOperand getUnpackhMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
|
|
unsigned Half = NumElems/2;
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
for (unsigned i = 0; i != Half; ++i) {
|
|
MaskVec.push_back(DAG.getConstant(i + Half, BaseVT));
|
|
MaskVec.push_back(DAG.getConstant(i + NumElems + Half, BaseVT));
|
|
}
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0], MaskVec.size());
|
|
}
|
|
|
|
/// PromoteSplat - Promote a splat of v8i16 or v16i8 to v4i32.
|
|
///
|
|
static SDOperand PromoteSplat(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand V1 = Op.getOperand(0);
|
|
SDOperand Mask = Op.getOperand(2);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
Mask = getUnpacklMask(NumElems, DAG);
|
|
while (NumElems != 4) {
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1, Mask);
|
|
NumElems >>= 1;
|
|
}
|
|
V1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, V1);
|
|
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
Mask = getZeroVector(MaskVT, DAG);
|
|
SDOperand Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v4i32, V1,
|
|
DAG.getNode(ISD::UNDEF, MVT::v4i32), Mask);
|
|
return DAG.getNode(ISD::BIT_CONVERT, VT, Shuffle);
|
|
}
|
|
|
|
/// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
|
|
/// vector of zero or undef vector.
|
|
static SDOperand getShuffleVectorZeroOrUndef(SDOperand V2, MVT::ValueType VT,
|
|
unsigned NumElems, unsigned Idx,
|
|
bool isZero, SelectionDAG &DAG) {
|
|
SDOperand V1 = isZero ? getZeroVector(VT, DAG) : DAG.getNode(ISD::UNDEF, VT);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType EVT = MVT::getVectorElementType(MaskVT);
|
|
SDOperand Zero = DAG.getConstant(0, EVT);
|
|
SmallVector<SDOperand, 8> MaskVec(NumElems, Zero);
|
|
MaskVec[Idx] = DAG.getConstant(NumElems, EVT);
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskVec[0], MaskVec.size());
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
}
|
|
|
|
/// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
|
|
///
|
|
static SDOperand LowerBuildVectorv16i8(SDOperand Op, unsigned NonZeros,
|
|
unsigned NumNonZero, unsigned NumZero,
|
|
SelectionDAG &DAG, TargetLowering &TLI) {
|
|
if (NumNonZero > 8)
|
|
return SDOperand();
|
|
|
|
SDOperand V(0, 0);
|
|
bool First = true;
|
|
for (unsigned i = 0; i < 16; ++i) {
|
|
bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
|
|
if (ThisIsNonZero && First) {
|
|
if (NumZero)
|
|
V = getZeroVector(MVT::v8i16, DAG);
|
|
else
|
|
V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
|
|
First = false;
|
|
}
|
|
|
|
if ((i & 1) != 0) {
|
|
SDOperand ThisElt(0, 0), LastElt(0, 0);
|
|
bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
|
|
if (LastIsNonZero) {
|
|
LastElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i-1));
|
|
}
|
|
if (ThisIsNonZero) {
|
|
ThisElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i));
|
|
ThisElt = DAG.getNode(ISD::SHL, MVT::i16,
|
|
ThisElt, DAG.getConstant(8, MVT::i8));
|
|
if (LastIsNonZero)
|
|
ThisElt = DAG.getNode(ISD::OR, MVT::i16, ThisElt, LastElt);
|
|
} else
|
|
ThisElt = LastElt;
|
|
|
|
if (ThisElt.Val)
|
|
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, ThisElt,
|
|
DAG.getConstant(i/2, TLI.getPointerTy()));
|
|
}
|
|
}
|
|
|
|
return DAG.getNode(ISD::BIT_CONVERT, MVT::v16i8, V);
|
|
}
|
|
|
|
/// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
|
|
///
|
|
static SDOperand LowerBuildVectorv8i16(SDOperand Op, unsigned NonZeros,
|
|
unsigned NumNonZero, unsigned NumZero,
|
|
SelectionDAG &DAG, TargetLowering &TLI) {
|
|
if (NumNonZero > 4)
|
|
return SDOperand();
|
|
|
|
SDOperand V(0, 0);
|
|
bool First = true;
|
|
for (unsigned i = 0; i < 8; ++i) {
|
|
bool isNonZero = (NonZeros & (1 << i)) != 0;
|
|
if (isNonZero) {
|
|
if (First) {
|
|
if (NumZero)
|
|
V = getZeroVector(MVT::v8i16, DAG);
|
|
else
|
|
V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
|
|
First = false;
|
|
}
|
|
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, Op.getOperand(i),
|
|
DAG.getConstant(i, TLI.getPointerTy()));
|
|
}
|
|
}
|
|
|
|
return V;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
|
|
// All zero's are handled with pxor.
|
|
if (ISD::isBuildVectorAllZeros(Op.Val))
|
|
return Op;
|
|
|
|
// All one's are handled with pcmpeqd.
|
|
if (ISD::isBuildVectorAllOnes(Op.Val))
|
|
return Op;
|
|
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType EVT = MVT::getVectorElementType(VT);
|
|
unsigned EVTBits = MVT::getSizeInBits(EVT);
|
|
|
|
unsigned NumElems = Op.getNumOperands();
|
|
unsigned NumZero = 0;
|
|
unsigned NumNonZero = 0;
|
|
unsigned NonZeros = 0;
|
|
unsigned NumNonZeroImms = 0;
|
|
std::set<SDOperand> Values;
|
|
for (unsigned i = 0; i < NumElems; ++i) {
|
|
SDOperand Elt = Op.getOperand(i);
|
|
if (Elt.getOpcode() != ISD::UNDEF) {
|
|
Values.insert(Elt);
|
|
if (isZeroNode(Elt))
|
|
NumZero++;
|
|
else {
|
|
NonZeros |= (1 << i);
|
|
NumNonZero++;
|
|
if (Elt.getOpcode() == ISD::Constant ||
|
|
Elt.getOpcode() == ISD::ConstantFP)
|
|
NumNonZeroImms++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NumNonZero == 0) {
|
|
if (NumZero == 0)
|
|
// All undef vector. Return an UNDEF.
|
|
return DAG.getNode(ISD::UNDEF, VT);
|
|
else
|
|
// A mix of zero and undef. Return a zero vector.
|
|
return getZeroVector(VT, DAG);
|
|
}
|
|
|
|
// Splat is obviously ok. Let legalizer expand it to a shuffle.
|
|
if (Values.size() == 1)
|
|
return SDOperand();
|
|
|
|
// Special case for single non-zero element.
|
|
if (NumNonZero == 1) {
|
|
unsigned Idx = CountTrailingZeros_32(NonZeros);
|
|
SDOperand Item = Op.getOperand(Idx);
|
|
Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Item);
|
|
if (Idx == 0)
|
|
// Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
|
|
return getShuffleVectorZeroOrUndef(Item, VT, NumElems, Idx,
|
|
NumZero > 0, DAG);
|
|
|
|
if (EVTBits == 32) {
|
|
// Turn it into a shuffle of zero and zero-extended scalar to vector.
|
|
Item = getShuffleVectorZeroOrUndef(Item, VT, NumElems, 0, NumZero > 0,
|
|
DAG);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
for (unsigned i = 0; i < NumElems; i++)
|
|
MaskVec.push_back(DAG.getConstant((i == Idx) ? 0 : 1, MaskEVT));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskVec[0], MaskVec.size());
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, Item,
|
|
DAG.getNode(ISD::UNDEF, VT), Mask);
|
|
}
|
|
}
|
|
|
|
// A vector full of immediates; various special cases are already
|
|
// handled, so this is best done with a single constant-pool load.
|
|
if (NumNonZero == NumNonZeroImms)
|
|
return SDOperand();
|
|
|
|
// Let legalizer expand 2-wide build_vectors.
|
|
if (EVTBits == 64)
|
|
return SDOperand();
|
|
|
|
// If element VT is < 32 bits, convert it to inserts into a zero vector.
|
|
if (EVTBits == 8 && NumElems == 16) {
|
|
SDOperand V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
|
|
*this);
|
|
if (V.Val) return V;
|
|
}
|
|
|
|
if (EVTBits == 16 && NumElems == 8) {
|
|
SDOperand V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
|
|
*this);
|
|
if (V.Val) return V;
|
|
}
|
|
|
|
// If element VT is == 32 bits, turn it into a number of shuffles.
|
|
SmallVector<SDOperand, 8> V;
|
|
V.resize(NumElems);
|
|
if (NumElems == 4 && NumZero > 0) {
|
|
for (unsigned i = 0; i < 4; ++i) {
|
|
bool isZero = !(NonZeros & (1 << i));
|
|
if (isZero)
|
|
V[i] = getZeroVector(VT, DAG);
|
|
else
|
|
V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
|
|
}
|
|
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
|
|
default: break;
|
|
case 0:
|
|
V[i] = V[i*2]; // Must be a zero vector.
|
|
break;
|
|
case 1:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2+1], V[i*2],
|
|
getMOVLMask(NumElems, DAG));
|
|
break;
|
|
case 2:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
|
|
getMOVLMask(NumElems, DAG));
|
|
break;
|
|
case 3:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
|
|
getUnpacklMask(NumElems, DAG));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Take advantage of the fact GR32 to VR128 scalar_to_vector (i.e. movd)
|
|
// clears the upper bits.
|
|
// FIXME: we can do the same for v4f32 case when we know both parts of
|
|
// the lower half come from scalar_to_vector (loadf32). We should do
|
|
// that in post legalizer dag combiner with target specific hooks.
|
|
if (MVT::isInteger(EVT) && (NonZeros & (0x3 << 2)) == 0)
|
|
return V[0];
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType EVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
bool Reverse = (NonZeros & 0x3) == 2;
|
|
for (unsigned i = 0; i < 2; ++i)
|
|
if (Reverse)
|
|
MaskVec.push_back(DAG.getConstant(1-i, EVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(i, EVT));
|
|
Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
|
|
for (unsigned i = 0; i < 2; ++i)
|
|
if (Reverse)
|
|
MaskVec.push_back(DAG.getConstant(1-i+NumElems, EVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(i+NumElems, EVT));
|
|
SDOperand ShufMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskVec[0], MaskVec.size());
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[0], V[1], ShufMask);
|
|
}
|
|
|
|
if (Values.size() > 2) {
|
|
// Expand into a number of unpckl*.
|
|
// e.g. for v4f32
|
|
// Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
|
|
// : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
|
|
// Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
|
|
SDOperand UnpckMask = getUnpacklMask(NumElems, DAG);
|
|
for (unsigned i = 0; i < NumElems; ++i)
|
|
V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
|
|
NumElems >>= 1;
|
|
while (NumElems != 0) {
|
|
for (unsigned i = 0; i < NumElems; ++i)
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i], V[i + NumElems],
|
|
UnpckMask);
|
|
NumElems >>= 1;
|
|
}
|
|
return V[0];
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand V1 = Op.getOperand(0);
|
|
SDOperand V2 = Op.getOperand(1);
|
|
SDOperand PermMask = Op.getOperand(2);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
unsigned NumElems = PermMask.getNumOperands();
|
|
bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
|
|
bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
|
|
bool V1IsSplat = false;
|
|
bool V2IsSplat = false;
|
|
|
|
if (isUndefShuffle(Op.Val))
|
|
return DAG.getNode(ISD::UNDEF, VT);
|
|
|
|
if (isZeroShuffle(Op.Val))
|
|
return getZeroVector(VT, DAG);
|
|
|
|
if (isIdentityMask(PermMask.Val))
|
|
return V1;
|
|
else if (isIdentityMask(PermMask.Val, true))
|
|
return V2;
|
|
|
|
if (isSplatMask(PermMask.Val)) {
|
|
if (NumElems <= 4) return Op;
|
|
// Promote it to a v4i32 splat.
|
|
return PromoteSplat(Op, DAG);
|
|
}
|
|
|
|
if (X86::isMOVLMask(PermMask.Val))
|
|
return (V1IsUndef) ? V2 : Op;
|
|
|
|
if (X86::isMOVSHDUPMask(PermMask.Val) ||
|
|
X86::isMOVSLDUPMask(PermMask.Val) ||
|
|
X86::isMOVHLPSMask(PermMask.Val) ||
|
|
X86::isMOVHPMask(PermMask.Val) ||
|
|
X86::isMOVLPMask(PermMask.Val))
|
|
return Op;
|
|
|
|
if (ShouldXformToMOVHLPS(PermMask.Val) ||
|
|
ShouldXformToMOVLP(V1.Val, V2.Val, PermMask.Val))
|
|
return CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
|
|
|
|
bool Commuted = false;
|
|
V1IsSplat = isSplatVector(V1.Val);
|
|
V2IsSplat = isSplatVector(V2.Val);
|
|
if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
|
|
Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
|
|
std::swap(V1IsSplat, V2IsSplat);
|
|
std::swap(V1IsUndef, V2IsUndef);
|
|
Commuted = true;
|
|
}
|
|
|
|
if (isCommutedMOVL(PermMask.Val, V2IsSplat, V2IsUndef)) {
|
|
if (V2IsUndef) return V1;
|
|
Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
|
|
if (V2IsSplat) {
|
|
// V2 is a splat, so the mask may be malformed. That is, it may point
|
|
// to any V2 element. The instruction selectior won't like this. Get
|
|
// a corrected mask and commute to form a proper MOVS{S|D}.
|
|
SDOperand NewMask = getMOVLMask(NumElems, DAG);
|
|
if (NewMask.Val != PermMask.Val)
|
|
Op = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
}
|
|
return Op;
|
|
}
|
|
|
|
if (X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
|
|
X86::isUNPCKH_v_undef_Mask(PermMask.Val) ||
|
|
X86::isUNPCKLMask(PermMask.Val) ||
|
|
X86::isUNPCKHMask(PermMask.Val))
|
|
return Op;
|
|
|
|
if (V2IsSplat) {
|
|
// Normalize mask so all entries that point to V2 points to its first
|
|
// element then try to match unpck{h|l} again. If match, return a
|
|
// new vector_shuffle with the corrected mask.
|
|
SDOperand NewMask = NormalizeMask(PermMask, DAG);
|
|
if (NewMask.Val != PermMask.Val) {
|
|
if (X86::isUNPCKLMask(PermMask.Val, true)) {
|
|
SDOperand NewMask = getUnpacklMask(NumElems, DAG);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
} else if (X86::isUNPCKHMask(PermMask.Val, true)) {
|
|
SDOperand NewMask = getUnpackhMask(NumElems, DAG);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Normalize the node to match x86 shuffle ops if needed
|
|
if (V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(PermMask.Val))
|
|
Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
|
|
|
|
if (Commuted) {
|
|
// Commute is back and try unpck* again.
|
|
Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
|
|
if (X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
|
|
X86::isUNPCKH_v_undef_Mask(PermMask.Val) ||
|
|
X86::isUNPCKLMask(PermMask.Val) ||
|
|
X86::isUNPCKHMask(PermMask.Val))
|
|
return Op;
|
|
}
|
|
|
|
// If VT is integer, try PSHUF* first, then SHUFP*.
|
|
if (MVT::isInteger(VT)) {
|
|
if (X86::isPSHUFDMask(PermMask.Val) ||
|
|
X86::isPSHUFHWMask(PermMask.Val) ||
|
|
X86::isPSHUFLWMask(PermMask.Val)) {
|
|
if (V2.getOpcode() != ISD::UNDEF)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
|
|
DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
|
|
return Op;
|
|
}
|
|
|
|
if (X86::isSHUFPMask(PermMask.Val) &&
|
|
MVT::getSizeInBits(VT) != 64) // Don't do this for MMX.
|
|
return Op;
|
|
|
|
// Handle v8i16 shuffle high / low shuffle node pair.
|
|
if (VT == MVT::v8i16 && isPSHUFHW_PSHUFLWMask(PermMask.Val)) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
MaskVec.push_back(PermMask.getOperand(i));
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskVec[0], MaskVec.size());
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
MaskVec.clear();
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
MaskVec.push_back(PermMask.getOperand(i));
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, &MaskVec[0],MaskVec.size());
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
}
|
|
} else {
|
|
// Floating point cases in the other order.
|
|
if (X86::isSHUFPMask(PermMask.Val))
|
|
return Op;
|
|
if (X86::isPSHUFDMask(PermMask.Val) ||
|
|
X86::isPSHUFHWMask(PermMask.Val) ||
|
|
X86::isPSHUFLWMask(PermMask.Val)) {
|
|
if (V2.getOpcode() != ISD::UNDEF)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
|
|
DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
|
|
return Op;
|
|
}
|
|
}
|
|
|
|
if (NumElems == 4 &&
|
|
// Don't do this for MMX.
|
|
MVT::getSizeInBits(VT) != 64) {
|
|
MVT::ValueType MaskVT = PermMask.getValueType();
|
|
MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<std::pair<int, int>, 8> Locs;
|
|
Locs.reserve(NumElems);
|
|
SmallVector<SDOperand, 8> Mask1(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
SmallVector<SDOperand, 8> Mask2(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
unsigned NumHi = 0;
|
|
unsigned NumLo = 0;
|
|
// If no more than two elements come from either vector. This can be
|
|
// implemented with two shuffles. First shuffle gather the elements.
|
|
// The second shuffle, which takes the first shuffle as both of its
|
|
// vector operands, put the elements into the right order.
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Elt = PermMask.getOperand(i);
|
|
if (Elt.getOpcode() == ISD::UNDEF) {
|
|
Locs[i] = std::make_pair(-1, -1);
|
|
} else {
|
|
unsigned Val = cast<ConstantSDNode>(Elt)->getValue();
|
|
if (Val < NumElems) {
|
|
Locs[i] = std::make_pair(0, NumLo);
|
|
Mask1[NumLo] = Elt;
|
|
NumLo++;
|
|
} else {
|
|
Locs[i] = std::make_pair(1, NumHi);
|
|
if (2+NumHi < NumElems)
|
|
Mask1[2+NumHi] = Elt;
|
|
NumHi++;
|
|
}
|
|
}
|
|
}
|
|
if (NumLo <= 2 && NumHi <= 2) {
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&Mask1[0], Mask1.size()));
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (Locs[i].first == -1)
|
|
continue;
|
|
else {
|
|
unsigned Idx = (i < NumElems/2) ? 0 : NumElems;
|
|
Idx += Locs[i].first * (NumElems/2) + Locs[i].second;
|
|
Mask2[i] = DAG.getConstant(Idx, MaskEVT);
|
|
}
|
|
}
|
|
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&Mask2[0], Mask2.size()));
|
|
}
|
|
|
|
// Break it into (shuffle shuffle_hi, shuffle_lo).
|
|
Locs.clear();
|
|
SmallVector<SDOperand,8> LoMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
SmallVector<SDOperand,8> HiMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
SmallVector<SDOperand,8> *MaskPtr = &LoMask;
|
|
unsigned MaskIdx = 0;
|
|
unsigned LoIdx = 0;
|
|
unsigned HiIdx = NumElems/2;
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (i == NumElems/2) {
|
|
MaskPtr = &HiMask;
|
|
MaskIdx = 1;
|
|
LoIdx = 0;
|
|
HiIdx = NumElems/2;
|
|
}
|
|
SDOperand Elt = PermMask.getOperand(i);
|
|
if (Elt.getOpcode() == ISD::UNDEF) {
|
|
Locs[i] = std::make_pair(-1, -1);
|
|
} else if (cast<ConstantSDNode>(Elt)->getValue() < NumElems) {
|
|
Locs[i] = std::make_pair(MaskIdx, LoIdx);
|
|
(*MaskPtr)[LoIdx] = Elt;
|
|
LoIdx++;
|
|
} else {
|
|
Locs[i] = std::make_pair(MaskIdx, HiIdx);
|
|
(*MaskPtr)[HiIdx] = Elt;
|
|
HiIdx++;
|
|
}
|
|
}
|
|
|
|
SDOperand LoShuffle =
|
|
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&LoMask[0], LoMask.size()));
|
|
SDOperand HiShuffle =
|
|
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&HiMask[0], HiMask.size()));
|
|
SmallVector<SDOperand, 8> MaskOps;
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (Locs[i].first == -1) {
|
|
MaskOps.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
} else {
|
|
unsigned Idx = Locs[i].first * NumElems + Locs[i].second;
|
|
MaskOps.push_back(DAG.getConstant(Idx, MaskEVT));
|
|
}
|
|
}
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, LoShuffle, HiShuffle,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskOps[0], MaskOps.size()));
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
|
|
if (!isa<ConstantSDNode>(Op.getOperand(1)))
|
|
return SDOperand();
|
|
|
|
MVT::ValueType VT = Op.getValueType();
|
|
// TODO: handle v16i8.
|
|
if (MVT::getSizeInBits(VT) == 16) {
|
|
// Transform it so it match pextrw which produces a 32-bit result.
|
|
MVT::ValueType EVT = (MVT::ValueType)(VT+1);
|
|
SDOperand Extract = DAG.getNode(X86ISD::PEXTRW, EVT,
|
|
Op.getOperand(0), Op.getOperand(1));
|
|
SDOperand Assert = DAG.getNode(ISD::AssertZext, EVT, Extract,
|
|
DAG.getValueType(VT));
|
|
return DAG.getNode(ISD::TRUNCATE, VT, Assert);
|
|
} else if (MVT::getSizeInBits(VT) == 32) {
|
|
SDOperand Vec = Op.getOperand(0);
|
|
unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (Idx == 0)
|
|
return Op;
|
|
// SHUFPS the element to the lowest double word, then movss.
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
SmallVector<SDOperand, 8> IdxVec;
|
|
IdxVec.push_back(DAG.getConstant(Idx, MVT::getVectorElementType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&IdxVec[0], IdxVec.size());
|
|
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
|
|
Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
|
|
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
|
|
DAG.getConstant(0, getPointerTy()));
|
|
} else if (MVT::getSizeInBits(VT) == 64) {
|
|
SDOperand Vec = Op.getOperand(0);
|
|
unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (Idx == 0)
|
|
return Op;
|
|
|
|
// UNPCKHPD the element to the lowest double word, then movsd.
|
|
// Note if the lower 64 bits of the result of the UNPCKHPD is then stored
|
|
// to a f64mem, the whole operation is folded into a single MOVHPDmr.
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
SmallVector<SDOperand, 8> IdxVec;
|
|
IdxVec.push_back(DAG.getConstant(1, MVT::getVectorElementType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(MaskVT)));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&IdxVec[0], IdxVec.size());
|
|
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
|
|
Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
|
|
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
|
|
DAG.getConstant(0, getPointerTy()));
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerINSERT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
|
|
// Transform it so it match pinsrw which expects a 16-bit value in a GR32
|
|
// as its second argument.
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(VT);
|
|
SDOperand N0 = Op.getOperand(0);
|
|
SDOperand N1 = Op.getOperand(1);
|
|
SDOperand N2 = Op.getOperand(2);
|
|
if (MVT::getSizeInBits(BaseVT) == 16) {
|
|
if (N1.getValueType() != MVT::i32)
|
|
N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
|
|
if (N2.getValueType() != MVT::i32)
|
|
N2 = DAG.getConstant(cast<ConstantSDNode>(N2)->getValue(),getPointerTy());
|
|
return DAG.getNode(X86ISD::PINSRW, VT, N0, N1, N2);
|
|
} else if (MVT::getSizeInBits(BaseVT) == 32) {
|
|
unsigned Idx = cast<ConstantSDNode>(N2)->getValue();
|
|
if (Idx == 0) {
|
|
// Use a movss.
|
|
N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, N1);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
MVT::ValueType BaseVT = MVT::getVectorElementType(MaskVT);
|
|
SmallVector<SDOperand, 8> MaskVec;
|
|
MaskVec.push_back(DAG.getConstant(4, BaseVT));
|
|
for (unsigned i = 1; i <= 3; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, N0, N1,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
|
|
&MaskVec[0], MaskVec.size()));
|
|
} else {
|
|
// Use two pinsrw instructions to insert a 32 bit value.
|
|
Idx <<= 1;
|
|
if (MVT::isFloatingPoint(N1.getValueType())) {
|
|
N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v4f32, N1);
|
|
N1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, N1);
|
|
N1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i32, N1,
|
|
DAG.getConstant(0, getPointerTy()));
|
|
}
|
|
N0 = DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, N0);
|
|
N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
|
|
DAG.getConstant(Idx, getPointerTy()));
|
|
N1 = DAG.getNode(ISD::SRL, MVT::i32, N1, DAG.getConstant(16, MVT::i8));
|
|
N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
|
|
DAG.getConstant(Idx+1, getPointerTy()));
|
|
return DAG.getNode(ISD::BIT_CONVERT, VT, N0);
|
|
}
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerSCALAR_TO_VECTOR(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand AnyExt = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, Op.getOperand(0));
|
|
return DAG.getNode(X86ISD::S2VEC, Op.getValueType(), AnyExt);
|
|
}
|
|
|
|
// ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
|
|
// their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
|
|
// one of the above mentioned nodes. It has to be wrapped because otherwise
|
|
// Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
|
|
// be used to form addressing mode. These wrapped nodes will be selected
|
|
// into MOV32ri.
|
|
SDOperand
|
|
X86TargetLowering::LowerConstantPool(SDOperand Op, SelectionDAG &DAG) {
|
|
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
|
|
SDOperand Result = DAG.getTargetConstantPool(CP->getConstVal(),
|
|
getPointerTy(),
|
|
CP->getAlignment());
|
|
Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
!Subtarget->isPICStyleRIPRel()) {
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
|
|
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
|
|
SDOperand Result = DAG.getTargetGlobalAddress(GV, getPointerTy());
|
|
Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
!Subtarget->isPICStyleRIPRel()) {
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
// For Darwin & Mingw32, external and weak symbols are indirect, so we want to
|
|
// load the value at address GV, not the value of GV itself. This means that
|
|
// the GlobalAddress must be in the base or index register of the address, not
|
|
// the GV offset field. Platform check is inside GVRequiresExtraLoad() call
|
|
// The same applies for external symbols during PIC codegen
|
|
if (Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false))
|
|
Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result, NULL, 0);
|
|
|
|
return Result;
|
|
}
|
|
|
|
// Lower ISD::GlobalTLSAddress using the "general dynamic" model
|
|
static SDOperand
|
|
LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
|
|
const MVT::ValueType PtrVT) {
|
|
SDOperand InFlag;
|
|
SDOperand Chain = DAG.getCopyToReg(DAG.getEntryNode(), X86::EBX,
|
|
DAG.getNode(X86ISD::GlobalBaseReg,
|
|
PtrVT), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
// emit leal symbol@TLSGD(,%ebx,1), %eax
|
|
SDVTList NodeTys = DAG.getVTList(PtrVT, MVT::Other, MVT::Flag);
|
|
SDOperand TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
|
|
GA->getValueType(0),
|
|
GA->getOffset());
|
|
SDOperand Ops[] = { Chain, TGA, InFlag };
|
|
SDOperand Result = DAG.getNode(X86ISD::TLSADDR, NodeTys, Ops, 3);
|
|
InFlag = Result.getValue(2);
|
|
Chain = Result.getValue(1);
|
|
|
|
// call ___tls_get_addr. This function receives its argument in
|
|
// the register EAX.
|
|
Chain = DAG.getCopyToReg(Chain, X86::EAX, Result, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SDOperand Ops1[] = { Chain,
|
|
DAG.getTargetExternalSymbol("___tls_get_addr",
|
|
PtrVT),
|
|
DAG.getRegister(X86::EAX, PtrVT),
|
|
DAG.getRegister(X86::EBX, PtrVT),
|
|
InFlag };
|
|
Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops1, 5);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
return DAG.getCopyFromReg(Chain, X86::EAX, PtrVT, InFlag);
|
|
}
|
|
|
|
// Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
|
|
// "local exec" model.
|
|
static SDOperand
|
|
LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
|
|
const MVT::ValueType PtrVT) {
|
|
// Get the Thread Pointer
|
|
SDOperand ThreadPointer = DAG.getNode(X86ISD::THREAD_POINTER, PtrVT);
|
|
// emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
|
|
// exec)
|
|
SDOperand TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
|
|
GA->getValueType(0),
|
|
GA->getOffset());
|
|
SDOperand Offset = DAG.getNode(X86ISD::Wrapper, PtrVT, TGA);
|
|
|
|
if (GA->getGlobal()->isDeclaration()) // initial exec TLS model
|
|
Offset = DAG.getLoad(PtrVT, DAG.getEntryNode(), Offset, NULL, 0);
|
|
|
|
// The address of the thread local variable is the add of the thread
|
|
// pointer with the offset of the variable.
|
|
return DAG.getNode(ISD::ADD, PtrVT, ThreadPointer, Offset);
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerGlobalTLSAddress(SDOperand Op, SelectionDAG &DAG) {
|
|
// TODO: implement the "local dynamic" model
|
|
// TODO: implement the "initial exec"model for pic executables
|
|
assert(!Subtarget->is64Bit() && Subtarget->isTargetELF() &&
|
|
"TLS not implemented for non-ELF and 64-bit targets");
|
|
GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
|
|
// If the relocation model is PIC, use the "General Dynamic" TLS Model,
|
|
// otherwise use the "Local Exec"TLS Model
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
|
|
return LowerToTLSGeneralDynamicModel(GA, DAG, getPointerTy());
|
|
else
|
|
return LowerToTLSExecModel(GA, DAG, getPointerTy());
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerExternalSymbol(SDOperand Op, SelectionDAG &DAG) {
|
|
const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
|
|
SDOperand Result = DAG.getTargetExternalSymbol(Sym, getPointerTy());
|
|
Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
!Subtarget->isPICStyleRIPRel()) {
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
|
|
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
|
|
SDOperand Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy());
|
|
Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
|
|
!Subtarget->isPICStyleRIPRel()) {
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerShift(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
|
|
"Not an i64 shift!");
|
|
bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
|
|
SDOperand ShOpLo = Op.getOperand(0);
|
|
SDOperand ShOpHi = Op.getOperand(1);
|
|
SDOperand ShAmt = Op.getOperand(2);
|
|
SDOperand Tmp1 = isSRA ?
|
|
DAG.getNode(ISD::SRA, MVT::i32, ShOpHi, DAG.getConstant(31, MVT::i8)) :
|
|
DAG.getConstant(0, MVT::i32);
|
|
|
|
SDOperand Tmp2, Tmp3;
|
|
if (Op.getOpcode() == ISD::SHL_PARTS) {
|
|
Tmp2 = DAG.getNode(X86ISD::SHLD, MVT::i32, ShOpHi, ShOpLo, ShAmt);
|
|
Tmp3 = DAG.getNode(ISD::SHL, MVT::i32, ShOpLo, ShAmt);
|
|
} else {
|
|
Tmp2 = DAG.getNode(X86ISD::SHRD, MVT::i32, ShOpLo, ShOpHi, ShAmt);
|
|
Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, MVT::i32, ShOpHi, ShAmt);
|
|
}
|
|
|
|
const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
|
|
SDOperand AndNode = DAG.getNode(ISD::AND, MVT::i8, ShAmt,
|
|
DAG.getConstant(32, MVT::i8));
|
|
SDOperand COps[]={DAG.getEntryNode(), AndNode, DAG.getConstant(0, MVT::i8)};
|
|
SDOperand InFlag = DAG.getNode(X86ISD::CMP, VTs, 2, COps, 3).getValue(1);
|
|
|
|
SDOperand Hi, Lo;
|
|
SDOperand CC = DAG.getConstant(X86::COND_NE, MVT::i8);
|
|
|
|
VTs = DAG.getNodeValueTypes(MVT::i32, MVT::Flag);
|
|
SmallVector<SDOperand, 4> Ops;
|
|
if (Op.getOpcode() == ISD::SHL_PARTS) {
|
|
Ops.push_back(Tmp2);
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Hi = DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
|
|
InFlag = Hi.getValue(1);
|
|
|
|
Ops.clear();
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(Tmp1);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Lo = DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
|
|
} else {
|
|
Ops.push_back(Tmp2);
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Lo = DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
|
|
InFlag = Lo.getValue(1);
|
|
|
|
Ops.clear();
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(Tmp1);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Hi = DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
|
|
}
|
|
|
|
VTs = DAG.getNodeValueTypes(MVT::i32, MVT::i32);
|
|
Ops.clear();
|
|
Ops.push_back(Lo);
|
|
Ops.push_back(Hi);
|
|
return DAG.getNode(ISD::MERGE_VALUES, VTs, 2, &Ops[0], Ops.size());
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSINT_TO_FP(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getOperand(0).getValueType() <= MVT::i64 &&
|
|
Op.getOperand(0).getValueType() >= MVT::i16 &&
|
|
"Unknown SINT_TO_FP to lower!");
|
|
|
|
SDOperand Result;
|
|
MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
|
|
unsigned Size = MVT::getSizeInBits(SrcVT)/8;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
SDOperand Chain = DAG.getStore(DAG.getEntryNode(), Op.getOperand(0),
|
|
StackSlot, NULL, 0);
|
|
|
|
// Build the FILD
|
|
SDVTList Tys;
|
|
if (X86ScalarSSE)
|
|
Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Flag);
|
|
else
|
|
Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(SrcVT));
|
|
Result = DAG.getNode(X86ScalarSSE ? X86ISD::FILD_FLAG :X86ISD::FILD,
|
|
Tys, &Ops[0], Ops.size());
|
|
|
|
if (X86ScalarSSE) {
|
|
Chain = Result.getValue(1);
|
|
SDOperand InFlag = Result.getValue(2);
|
|
|
|
// FIXME: Currently the FST is flagged to the FILD_FLAG. This
|
|
// shouldn't be necessary except that RFP cannot be live across
|
|
// multiple blocks. When stackifier is fixed, they can be uncoupled.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Tys = DAG.getVTList(MVT::Other);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Result);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(Op.getValueType()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
|
|
Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot, NULL, 0);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFP_TO_SINT(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getValueType() <= MVT::i64 && Op.getValueType() >= MVT::i16 &&
|
|
"Unknown FP_TO_SINT to lower!");
|
|
// We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
|
|
// stack slot.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
unsigned MemSize = MVT::getSizeInBits(Op.getValueType())/8;
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
|
|
unsigned Opc;
|
|
switch (Op.getValueType()) {
|
|
default: assert(0 && "Invalid FP_TO_SINT to lower!");
|
|
case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
|
|
case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
|
|
case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
|
|
}
|
|
|
|
SDOperand Chain = DAG.getEntryNode();
|
|
SDOperand Value = Op.getOperand(0);
|
|
if (X86ScalarSSE) {
|
|
assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
|
|
Chain = DAG.getStore(Chain, Value, StackSlot, NULL, 0);
|
|
SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
|
|
SDOperand Ops[] = {
|
|
Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
|
|
};
|
|
Value = DAG.getNode(X86ISD::FLD, Tys, Ops, 3);
|
|
Chain = Value.getValue(1);
|
|
SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
|
|
StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
}
|
|
|
|
// Build the FP_TO_INT*_IN_MEM
|
|
SDOperand Ops[] = { Chain, Value, StackSlot };
|
|
SDOperand FIST = DAG.getNode(Opc, MVT::Other, Ops, 3);
|
|
|
|
// Load the result.
|
|
return DAG.getLoad(Op.getValueType(), FIST, StackSlot, NULL, 0);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFABS(SDOperand Op, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType EltVT = VT;
|
|
if (MVT::isVector(VT))
|
|
EltVT = MVT::getVectorElementType(VT);
|
|
const Type *OpNTy = MVT::getTypeForValueType(EltVT);
|
|
std::vector<Constant*> CV;
|
|
if (EltVT == MVT::f64) {
|
|
Constant *C = ConstantFP::get(OpNTy, BitsToDouble(~(1ULL << 63)));
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
} else {
|
|
Constant *C = ConstantFP::get(OpNTy, BitsToFloat(~(1U << 31)));
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
}
|
|
Constant *C = ConstantVector::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
|
|
SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
|
|
false, 16);
|
|
return DAG.getNode(X86ISD::FAND, VT, Op.getOperand(0), Mask);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFNEG(SDOperand Op, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType EltVT = VT;
|
|
unsigned EltNum = 1;
|
|
if (MVT::isVector(VT)) {
|
|
EltVT = MVT::getVectorElementType(VT);
|
|
EltNum = MVT::getVectorNumElements(VT);
|
|
}
|
|
const Type *OpNTy = MVT::getTypeForValueType(EltVT);
|
|
std::vector<Constant*> CV;
|
|
if (EltVT == MVT::f64) {
|
|
Constant *C = ConstantFP::get(OpNTy, BitsToDouble(1ULL << 63));
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
} else {
|
|
Constant *C = ConstantFP::get(OpNTy, BitsToFloat(1U << 31));
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
CV.push_back(C);
|
|
}
|
|
Constant *C = ConstantVector::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
|
|
SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
|
|
false, 16);
|
|
if (MVT::isVector(VT)) {
|
|
return DAG.getNode(ISD::BIT_CONVERT, VT,
|
|
DAG.getNode(ISD::XOR, MVT::v2i64,
|
|
DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, Op.getOperand(0)),
|
|
DAG.getNode(ISD::BIT_CONVERT, MVT::v2i64, Mask)));
|
|
} else {
|
|
return DAG.getNode(X86ISD::FXOR, VT, Op.getOperand(0), Mask);
|
|
}
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFCOPYSIGN(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand Op0 = Op.getOperand(0);
|
|
SDOperand Op1 = Op.getOperand(1);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType SrcVT = Op1.getValueType();
|
|
const Type *SrcTy = MVT::getTypeForValueType(SrcVT);
|
|
|
|
// If second operand is smaller, extend it first.
|
|
if (MVT::getSizeInBits(SrcVT) < MVT::getSizeInBits(VT)) {
|
|
Op1 = DAG.getNode(ISD::FP_EXTEND, VT, Op1);
|
|
SrcVT = VT;
|
|
}
|
|
|
|
// First get the sign bit of second operand.
|
|
std::vector<Constant*> CV;
|
|
if (SrcVT == MVT::f64) {
|
|
CV.push_back(ConstantFP::get(SrcTy, BitsToDouble(1ULL << 63)));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
} else {
|
|
CV.push_back(ConstantFP::get(SrcTy, BitsToFloat(1U << 31)));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
}
|
|
Constant *C = ConstantVector::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
|
|
SDOperand Mask1 = DAG.getLoad(SrcVT, DAG.getEntryNode(), CPIdx, NULL, 0,
|
|
false, 16);
|
|
SDOperand SignBit = DAG.getNode(X86ISD::FAND, SrcVT, Op1, Mask1);
|
|
|
|
// Shift sign bit right or left if the two operands have different types.
|
|
if (MVT::getSizeInBits(SrcVT) > MVT::getSizeInBits(VT)) {
|
|
// Op0 is MVT::f32, Op1 is MVT::f64.
|
|
SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v2f64, SignBit);
|
|
SignBit = DAG.getNode(X86ISD::FSRL, MVT::v2f64, SignBit,
|
|
DAG.getConstant(32, MVT::i32));
|
|
SignBit = DAG.getNode(ISD::BIT_CONVERT, MVT::v4f32, SignBit);
|
|
SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::f32, SignBit,
|
|
DAG.getConstant(0, getPointerTy()));
|
|
}
|
|
|
|
// Clear first operand sign bit.
|
|
CV.clear();
|
|
if (VT == MVT::f64) {
|
|
CV.push_back(ConstantFP::get(SrcTy, BitsToDouble(~(1ULL << 63))));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
} else {
|
|
CV.push_back(ConstantFP::get(SrcTy, BitsToFloat(~(1U << 31))));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
CV.push_back(ConstantFP::get(SrcTy, 0.0));
|
|
}
|
|
C = ConstantVector::get(CV);
|
|
CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
|
|
SDOperand Mask2 = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
|
|
false, 16);
|
|
SDOperand Val = DAG.getNode(X86ISD::FAND, VT, Op0, Mask2);
|
|
|
|
// Or the value with the sign bit.
|
|
return DAG.getNode(X86ISD::FOR, VT, Val, SignBit);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSETCC(SDOperand Op, SelectionDAG &DAG,
|
|
SDOperand Chain) {
|
|
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
|
|
SDOperand Cond;
|
|
SDOperand Op0 = Op.getOperand(0);
|
|
SDOperand Op1 = Op.getOperand(1);
|
|
SDOperand CC = Op.getOperand(2);
|
|
ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
|
|
const MVT::ValueType *VTs1 = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
|
|
const MVT::ValueType *VTs2 = DAG.getNodeValueTypes(MVT::i8, MVT::Flag);
|
|
bool isFP = MVT::isFloatingPoint(Op.getOperand(1).getValueType());
|
|
unsigned X86CC;
|
|
|
|
if (translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC,
|
|
Op0, Op1, DAG)) {
|
|
SDOperand Ops1[] = { Chain, Op0, Op1 };
|
|
Cond = DAG.getNode(X86ISD::CMP, VTs1, 2, Ops1, 3).getValue(1);
|
|
SDOperand Ops2[] = { DAG.getConstant(X86CC, MVT::i8), Cond };
|
|
return DAG.getNode(X86ISD::SETCC, VTs2, 2, Ops2, 2);
|
|
}
|
|
|
|
assert(isFP && "Illegal integer SetCC!");
|
|
|
|
SDOperand COps[] = { Chain, Op0, Op1 };
|
|
Cond = DAG.getNode(X86ISD::CMP, VTs1, 2, COps, 3).getValue(1);
|
|
|
|
switch (SetCCOpcode) {
|
|
default: assert(false && "Illegal floating point SetCC!");
|
|
case ISD::SETOEQ: { // !PF & ZF
|
|
SDOperand Ops1[] = { DAG.getConstant(X86::COND_NP, MVT::i8), Cond };
|
|
SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, VTs2, 2, Ops1, 2);
|
|
SDOperand Ops2[] = { DAG.getConstant(X86::COND_E, MVT::i8),
|
|
Tmp1.getValue(1) };
|
|
SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, VTs2, 2, Ops2, 2);
|
|
return DAG.getNode(ISD::AND, MVT::i8, Tmp1, Tmp2);
|
|
}
|
|
case ISD::SETUNE: { // PF | !ZF
|
|
SDOperand Ops1[] = { DAG.getConstant(X86::COND_P, MVT::i8), Cond };
|
|
SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, VTs2, 2, Ops1, 2);
|
|
SDOperand Ops2[] = { DAG.getConstant(X86::COND_NE, MVT::i8),
|
|
Tmp1.getValue(1) };
|
|
SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, VTs2, 2, Ops2, 2);
|
|
return DAG.getNode(ISD::OR, MVT::i8, Tmp1, Tmp2);
|
|
}
|
|
}
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSELECT(SDOperand Op, SelectionDAG &DAG) {
|
|
bool addTest = true;
|
|
SDOperand Chain = DAG.getEntryNode();
|
|
SDOperand Cond = Op.getOperand(0);
|
|
SDOperand CC;
|
|
const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
|
|
|
|
if (Cond.getOpcode() == ISD::SETCC)
|
|
Cond = LowerSETCC(Cond, DAG, Chain);
|
|
|
|
if (Cond.getOpcode() == X86ISD::SETCC) {
|
|
CC = Cond.getOperand(0);
|
|
|
|
// If condition flag is set by a X86ISD::CMP, then make a copy of it
|
|
// (since flag operand cannot be shared). Use it as the condition setting
|
|
// operand in place of the X86ISD::SETCC.
|
|
// If the X86ISD::SETCC has more than one use, then perhaps it's better
|
|
// to use a test instead of duplicating the X86ISD::CMP (for register
|
|
// pressure reason)?
|
|
SDOperand Cmp = Cond.getOperand(1);
|
|
unsigned Opc = Cmp.getOpcode();
|
|
bool IllegalFPCMov = !X86ScalarSSE &&
|
|
MVT::isFloatingPoint(Op.getValueType()) &&
|
|
!hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
|
|
if ((Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI) &&
|
|
!IllegalFPCMov) {
|
|
SDOperand Ops[] = { Chain, Cmp.getOperand(1), Cmp.getOperand(2) };
|
|
Cond = DAG.getNode(Opc, VTs, 2, Ops, 3);
|
|
addTest = false;
|
|
}
|
|
}
|
|
|
|
if (addTest) {
|
|
CC = DAG.getConstant(X86::COND_NE, MVT::i8);
|
|
SDOperand Ops[] = { Chain, Cond, DAG.getConstant(0, MVT::i8) };
|
|
Cond = DAG.getNode(X86ISD::CMP, VTs, 2, Ops, 3);
|
|
}
|
|
|
|
VTs = DAG.getNodeValueTypes(Op.getValueType(), MVT::Flag);
|
|
SmallVector<SDOperand, 4> Ops;
|
|
// X86ISD::CMOV means set the result (which is operand 1) to the RHS if
|
|
// condition is true.
|
|
Ops.push_back(Op.getOperand(2));
|
|
Ops.push_back(Op.getOperand(1));
|
|
Ops.push_back(CC);
|
|
Ops.push_back(Cond.getValue(1));
|
|
return DAG.getNode(X86ISD::CMOV, VTs, 2, &Ops[0], Ops.size());
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerBRCOND(SDOperand Op, SelectionDAG &DAG) {
|
|
bool addTest = true;
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand Cond = Op.getOperand(1);
|
|
SDOperand Dest = Op.getOperand(2);
|
|
SDOperand CC;
|
|
const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
|
|
|
|
if (Cond.getOpcode() == ISD::SETCC)
|
|
Cond = LowerSETCC(Cond, DAG, Chain);
|
|
|
|
if (Cond.getOpcode() == X86ISD::SETCC) {
|
|
CC = Cond.getOperand(0);
|
|
|
|
// If condition flag is set by a X86ISD::CMP, then make a copy of it
|
|
// (since flag operand cannot be shared). Use it as the condition setting
|
|
// operand in place of the X86ISD::SETCC.
|
|
// If the X86ISD::SETCC has more than one use, then perhaps it's better
|
|
// to use a test instead of duplicating the X86ISD::CMP (for register
|
|
// pressure reason)?
|
|
SDOperand Cmp = Cond.getOperand(1);
|
|
unsigned Opc = Cmp.getOpcode();
|
|
if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI) {
|
|
SDOperand Ops[] = { Chain, Cmp.getOperand(1), Cmp.getOperand(2) };
|
|
Cond = DAG.getNode(Opc, VTs, 2, Ops, 3);
|
|
addTest = false;
|
|
}
|
|
}
|
|
|
|
if (addTest) {
|
|
CC = DAG.getConstant(X86::COND_NE, MVT::i8);
|
|
SDOperand Ops[] = { Chain, Cond, DAG.getConstant(0, MVT::i8) };
|
|
Cond = DAG.getNode(X86ISD::CMP, VTs, 2, Ops, 3);
|
|
}
|
|
return DAG.getNode(X86ISD::BRCOND, Op.getValueType(),
|
|
Cond, Op.getOperand(2), CC, Cond.getValue(1));
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
|
|
unsigned CallingConv= cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
|
|
if (Subtarget->is64Bit())
|
|
return LowerX86_64CCCCallTo(Op, DAG, CallingConv);
|
|
else
|
|
switch (CallingConv) {
|
|
default:
|
|
assert(0 && "Unsupported calling convention");
|
|
case CallingConv::Fast:
|
|
// TODO: Implement fastcc
|
|
// Falls through
|
|
case CallingConv::C:
|
|
case CallingConv::X86_StdCall:
|
|
return LowerCCCCallTo(Op, DAG, CallingConv);
|
|
case CallingConv::X86_FastCall:
|
|
return LowerFastCCCallTo(Op, DAG, CallingConv);
|
|
}
|
|
}
|
|
|
|
|
|
// Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
|
|
// Calls to _alloca is needed to probe the stack when allocating more than 4k
|
|
// bytes in one go. Touching the stack at 4K increments is necessary to ensure
|
|
// that the guard pages used by the OS virtual memory manager are allocated in
|
|
// correct sequence.
|
|
SDOperand
|
|
X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDOperand Op,
|
|
SelectionDAG &DAG) {
|
|
assert(Subtarget->isTargetCygMing() &&
|
|
"This should be used only on Cygwin/Mingw targets");
|
|
|
|
// Get the inputs.
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand Size = Op.getOperand(1);
|
|
// FIXME: Ensure alignment here
|
|
|
|
SDOperand Flag;
|
|
|
|
MVT::ValueType IntPtr = getPointerTy();
|
|
MVT::ValueType SPTy = (Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
|
|
|
|
Chain = DAG.getCopyToReg(Chain, X86::EAX, Size, Flag);
|
|
Flag = Chain.getValue(1);
|
|
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SDOperand Ops[] = { Chain,
|
|
DAG.getTargetExternalSymbol("_alloca", IntPtr),
|
|
DAG.getRegister(X86::EAX, IntPtr),
|
|
Flag };
|
|
Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops, 4);
|
|
Flag = Chain.getValue(1);
|
|
|
|
Chain = DAG.getCopyFromReg(Chain, X86StackPtr, SPTy).getValue(1);
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(SPTy);
|
|
Tys.push_back(MVT::Other);
|
|
SDOperand Ops1[2] = { Chain.getValue(0), Chain };
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops1, 2);
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG) {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
const Function* Fn = MF.getFunction();
|
|
if (Fn->hasExternalLinkage() &&
|
|
Subtarget->isTargetCygMing() &&
|
|
Fn->getName() == "main")
|
|
MF.getInfo<X86MachineFunctionInfo>()->setForceFramePointer(true);
|
|
|
|
unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (Subtarget->is64Bit())
|
|
return LowerX86_64CCCArguments(Op, DAG);
|
|
else
|
|
switch(CC) {
|
|
default:
|
|
assert(0 && "Unsupported calling convention");
|
|
case CallingConv::Fast:
|
|
// TODO: implement fastcc.
|
|
|
|
// Falls through
|
|
case CallingConv::C:
|
|
return LowerCCCArguments(Op, DAG);
|
|
case CallingConv::X86_StdCall:
|
|
MF.getInfo<X86MachineFunctionInfo>()->setDecorationStyle(StdCall);
|
|
return LowerCCCArguments(Op, DAG, true);
|
|
case CallingConv::X86_FastCall:
|
|
MF.getInfo<X86MachineFunctionInfo>()->setDecorationStyle(FastCall);
|
|
return LowerFastCCArguments(Op, DAG);
|
|
}
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerMEMSET(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand InFlag(0, 0);
|
|
SDOperand Chain = Op.getOperand(0);
|
|
unsigned Align =
|
|
(unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
|
|
if (Align == 0) Align = 1;
|
|
|
|
ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
|
|
// If not DWORD aligned, call memset if size is less than the threshold.
|
|
// It knows how to align to the right boundary first.
|
|
if ((Align & 3) != 0 ||
|
|
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
|
|
MVT::ValueType IntPtr = getPointerTy();
|
|
const Type *IntPtrTy = getTargetData()->getIntPtrType();
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Node = Op.getOperand(1);
|
|
Entry.Ty = IntPtrTy;
|
|
Args.push_back(Entry);
|
|
// Extend the unsigned i8 argument to be an int value for the call.
|
|
Entry.Node = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
|
|
Entry.Ty = IntPtrTy;
|
|
Args.push_back(Entry);
|
|
Entry.Node = Op.getOperand(3);
|
|
Args.push_back(Entry);
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
LowerCallTo(Chain, Type::VoidTy, false, false, CallingConv::C, false,
|
|
DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
|
|
return CallResult.second;
|
|
}
|
|
|
|
MVT::ValueType AVT;
|
|
SDOperand Count;
|
|
ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Op.getOperand(2));
|
|
unsigned BytesLeft = 0;
|
|
bool TwoRepStos = false;
|
|
if (ValC) {
|
|
unsigned ValReg;
|
|
uint64_t Val = ValC->getValue() & 255;
|
|
|
|
// If the value is a constant, then we can potentially use larger sets.
|
|
switch (Align & 3) {
|
|
case 2: // WORD aligned
|
|
AVT = MVT::i16;
|
|
ValReg = X86::AX;
|
|
Val = (Val << 8) | Val;
|
|
break;
|
|
case 0: // DWORD aligned
|
|
AVT = MVT::i32;
|
|
ValReg = X86::EAX;
|
|
Val = (Val << 8) | Val;
|
|
Val = (Val << 16) | Val;
|
|
if (Subtarget->is64Bit() && ((Align & 0xF) == 0)) { // QWORD aligned
|
|
AVT = MVT::i64;
|
|
ValReg = X86::RAX;
|
|
Val = (Val << 32) | Val;
|
|
}
|
|
break;
|
|
default: // Byte aligned
|
|
AVT = MVT::i8;
|
|
ValReg = X86::AL;
|
|
Count = Op.getOperand(3);
|
|
break;
|
|
}
|
|
|
|
if (AVT > MVT::i8) {
|
|
if (I) {
|
|
unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
|
|
Count = DAG.getConstant(I->getValue() / UBytes, getPointerTy());
|
|
BytesLeft = I->getValue() % UBytes;
|
|
} else {
|
|
assert(AVT >= MVT::i32 &&
|
|
"Do not use rep;stos if not at least DWORD aligned");
|
|
Count = DAG.getNode(ISD::SRL, Op.getOperand(3).getValueType(),
|
|
Op.getOperand(3), DAG.getConstant(2, MVT::i8));
|
|
TwoRepStos = true;
|
|
}
|
|
}
|
|
|
|
Chain = DAG.getCopyToReg(Chain, ValReg, DAG.getConstant(Val, AVT),
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
} else {
|
|
AVT = MVT::i8;
|
|
Count = Op.getOperand(3);
|
|
Chain = DAG.getCopyToReg(Chain, X86::AL, Op.getOperand(2), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RCX : X86::ECX,
|
|
Count, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RDI : X86::EDI,
|
|
Op.getOperand(1), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(AVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_STOS, Tys, &Ops[0], Ops.size());
|
|
|
|
if (TwoRepStos) {
|
|
InFlag = Chain.getValue(1);
|
|
Count = Op.getOperand(3);
|
|
MVT::ValueType CVT = Count.getValueType();
|
|
SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
|
|
DAG.getConstant((AVT == MVT::i64) ? 7 : 3, CVT));
|
|
Chain = DAG.getCopyToReg(Chain, (CVT == MVT::i64) ? X86::RCX : X86::ECX,
|
|
Left, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(MVT::i8));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_STOS, Tys, &Ops[0], Ops.size());
|
|
} else if (BytesLeft) {
|
|
// Issue stores for the last 1 - 7 bytes.
|
|
SDOperand Value;
|
|
unsigned Val = ValC->getValue() & 255;
|
|
unsigned Offset = I->getValue() - BytesLeft;
|
|
SDOperand DstAddr = Op.getOperand(1);
|
|
MVT::ValueType AddrVT = DstAddr.getValueType();
|
|
if (BytesLeft >= 4) {
|
|
Val = (Val << 8) | Val;
|
|
Val = (Val << 16) | Val;
|
|
Value = DAG.getConstant(Val, MVT::i32);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, AddrVT, DstAddr,
|
|
DAG.getConstant(Offset, AddrVT)),
|
|
NULL, 0);
|
|
BytesLeft -= 4;
|
|
Offset += 4;
|
|
}
|
|
if (BytesLeft >= 2) {
|
|
Value = DAG.getConstant((Val << 8) | Val, MVT::i16);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, AddrVT, DstAddr,
|
|
DAG.getConstant(Offset, AddrVT)),
|
|
NULL, 0);
|
|
BytesLeft -= 2;
|
|
Offset += 2;
|
|
}
|
|
if (BytesLeft == 1) {
|
|
Value = DAG.getConstant(Val, MVT::i8);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, AddrVT, DstAddr,
|
|
DAG.getConstant(Offset, AddrVT)),
|
|
NULL, 0);
|
|
}
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerMEMCPY(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand Chain = Op.getOperand(0);
|
|
unsigned Align =
|
|
(unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
|
|
if (Align == 0) Align = 1;
|
|
|
|
ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
|
|
// If not DWORD aligned, call memcpy if size is less than the threshold.
|
|
// It knows how to align to the right boundary first.
|
|
if ((Align & 3) != 0 ||
|
|
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
|
|
MVT::ValueType IntPtr = getPointerTy();
|
|
TargetLowering::ArgListTy Args;
|
|
TargetLowering::ArgListEntry Entry;
|
|
Entry.Ty = getTargetData()->getIntPtrType();
|
|
Entry.Node = Op.getOperand(1); Args.push_back(Entry);
|
|
Entry.Node = Op.getOperand(2); Args.push_back(Entry);
|
|
Entry.Node = Op.getOperand(3); Args.push_back(Entry);
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
LowerCallTo(Chain, Type::VoidTy, false, false, CallingConv::C, false,
|
|
DAG.getExternalSymbol("memcpy", IntPtr), Args, DAG);
|
|
return CallResult.second;
|
|
}
|
|
|
|
MVT::ValueType AVT;
|
|
SDOperand Count;
|
|
unsigned BytesLeft = 0;
|
|
bool TwoRepMovs = false;
|
|
switch (Align & 3) {
|
|
case 2: // WORD aligned
|
|
AVT = MVT::i16;
|
|
break;
|
|
case 0: // DWORD aligned
|
|
AVT = MVT::i32;
|
|
if (Subtarget->is64Bit() && ((Align & 0xF) == 0)) // QWORD aligned
|
|
AVT = MVT::i64;
|
|
break;
|
|
default: // Byte aligned
|
|
AVT = MVT::i8;
|
|
Count = Op.getOperand(3);
|
|
break;
|
|
}
|
|
|
|
if (AVT > MVT::i8) {
|
|
if (I) {
|
|
unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
|
|
Count = DAG.getConstant(I->getValue() / UBytes, getPointerTy());
|
|
BytesLeft = I->getValue() % UBytes;
|
|
} else {
|
|
assert(AVT >= MVT::i32 &&
|
|
"Do not use rep;movs if not at least DWORD aligned");
|
|
Count = DAG.getNode(ISD::SRL, Op.getOperand(3).getValueType(),
|
|
Op.getOperand(3), DAG.getConstant(2, MVT::i8));
|
|
TwoRepMovs = true;
|
|
}
|
|
}
|
|
|
|
SDOperand InFlag(0, 0);
|
|
Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RCX : X86::ECX,
|
|
Count, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RDI : X86::EDI,
|
|
Op.getOperand(1), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, Subtarget->is64Bit() ? X86::RSI : X86::ESI,
|
|
Op.getOperand(2), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SmallVector<SDOperand, 8> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(AVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, &Ops[0], Ops.size());
|
|
|
|
if (TwoRepMovs) {
|
|
InFlag = Chain.getValue(1);
|
|
Count = Op.getOperand(3);
|
|
MVT::ValueType CVT = Count.getValueType();
|
|
SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
|
|
DAG.getConstant((AVT == MVT::i64) ? 7 : 3, CVT));
|
|
Chain = DAG.getCopyToReg(Chain, (CVT == MVT::i64) ? X86::RCX : X86::ECX,
|
|
Left, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(MVT::i8));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, &Ops[0], Ops.size());
|
|
} else if (BytesLeft) {
|
|
// Issue loads and stores for the last 1 - 7 bytes.
|
|
unsigned Offset = I->getValue() - BytesLeft;
|
|
SDOperand DstAddr = Op.getOperand(1);
|
|
MVT::ValueType DstVT = DstAddr.getValueType();
|
|
SDOperand SrcAddr = Op.getOperand(2);
|
|
MVT::ValueType SrcVT = SrcAddr.getValueType();
|
|
SDOperand Value;
|
|
if (BytesLeft >= 4) {
|
|
Value = DAG.getLoad(MVT::i32, Chain,
|
|
DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
|
|
DAG.getConstant(Offset, SrcVT)),
|
|
NULL, 0);
|
|
Chain = Value.getValue(1);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, DstVT, DstAddr,
|
|
DAG.getConstant(Offset, DstVT)),
|
|
NULL, 0);
|
|
BytesLeft -= 4;
|
|
Offset += 4;
|
|
}
|
|
if (BytesLeft >= 2) {
|
|
Value = DAG.getLoad(MVT::i16, Chain,
|
|
DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
|
|
DAG.getConstant(Offset, SrcVT)),
|
|
NULL, 0);
|
|
Chain = Value.getValue(1);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, DstVT, DstAddr,
|
|
DAG.getConstant(Offset, DstVT)),
|
|
NULL, 0);
|
|
BytesLeft -= 2;
|
|
Offset += 2;
|
|
}
|
|
|
|
if (BytesLeft == 1) {
|
|
Value = DAG.getLoad(MVT::i8, Chain,
|
|
DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
|
|
DAG.getConstant(Offset, SrcVT)),
|
|
NULL, 0);
|
|
Chain = Value.getValue(1);
|
|
Chain = DAG.getStore(Chain, Value,
|
|
DAG.getNode(ISD::ADD, DstVT, DstAddr,
|
|
DAG.getConstant(Offset, DstVT)),
|
|
NULL, 0);
|
|
}
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerREADCYCLCECOUNTER(SDOperand Op, SelectionDAG &DAG) {
|
|
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
|
|
SDOperand TheOp = Op.getOperand(0);
|
|
SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, &TheOp, 1);
|
|
if (Subtarget->is64Bit()) {
|
|
SDOperand Copy1 = DAG.getCopyFromReg(rd, X86::RAX, MVT::i64, rd.getValue(1));
|
|
SDOperand Copy2 = DAG.getCopyFromReg(Copy1.getValue(1), X86::RDX,
|
|
MVT::i64, Copy1.getValue(2));
|
|
SDOperand Tmp = DAG.getNode(ISD::SHL, MVT::i64, Copy2,
|
|
DAG.getConstant(32, MVT::i8));
|
|
SDOperand Ops[] = {
|
|
DAG.getNode(ISD::OR, MVT::i64, Copy1, Tmp), Copy2.getValue(1)
|
|
};
|
|
|
|
Tys = DAG.getVTList(MVT::i64, MVT::Other);
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 2);
|
|
}
|
|
|
|
SDOperand Copy1 = DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1));
|
|
SDOperand Copy2 = DAG.getCopyFromReg(Copy1.getValue(1), X86::EDX,
|
|
MVT::i32, Copy1.getValue(2));
|
|
SDOperand Ops[] = { Copy1, Copy2, Copy2.getValue(1) };
|
|
Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops, 3);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG) {
|
|
SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
|
|
|
|
if (!Subtarget->is64Bit()) {
|
|
// vastart just stores the address of the VarArgsFrameIndex slot into the
|
|
// memory location argument.
|
|
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
|
|
return DAG.getStore(Op.getOperand(0), FR,Op.getOperand(1), SV->getValue(),
|
|
SV->getOffset());
|
|
}
|
|
|
|
// __va_list_tag:
|
|
// gp_offset (0 - 6 * 8)
|
|
// fp_offset (48 - 48 + 8 * 16)
|
|
// overflow_arg_area (point to parameters coming in memory).
|
|
// reg_save_area
|
|
SmallVector<SDOperand, 8> MemOps;
|
|
SDOperand FIN = Op.getOperand(1);
|
|
// Store gp_offset
|
|
SDOperand Store = DAG.getStore(Op.getOperand(0),
|
|
DAG.getConstant(VarArgsGPOffset, MVT::i32),
|
|
FIN, SV->getValue(), SV->getOffset());
|
|
MemOps.push_back(Store);
|
|
|
|
// Store fp_offset
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
|
|
DAG.getConstant(4, getPointerTy()));
|
|
Store = DAG.getStore(Op.getOperand(0),
|
|
DAG.getConstant(VarArgsFPOffset, MVT::i32),
|
|
FIN, SV->getValue(), SV->getOffset());
|
|
MemOps.push_back(Store);
|
|
|
|
// Store ptr to overflow_arg_area
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
|
|
DAG.getConstant(4, getPointerTy()));
|
|
SDOperand OVFIN = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
|
|
Store = DAG.getStore(Op.getOperand(0), OVFIN, FIN, SV->getValue(),
|
|
SV->getOffset());
|
|
MemOps.push_back(Store);
|
|
|
|
// Store ptr to reg_save_area.
|
|
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
|
|
DAG.getConstant(8, getPointerTy()));
|
|
SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
|
|
Store = DAG.getStore(Op.getOperand(0), RSFIN, FIN, SV->getValue(),
|
|
SV->getOffset());
|
|
MemOps.push_back(Store);
|
|
return DAG.getNode(ISD::TokenFactor, MVT::Other, &MemOps[0], MemOps.size());
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerVACOPY(SDOperand Op, SelectionDAG &DAG) {
|
|
// X86-64 va_list is a struct { i32, i32, i8*, i8* }.
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand DstPtr = Op.getOperand(1);
|
|
SDOperand SrcPtr = Op.getOperand(2);
|
|
SrcValueSDNode *DstSV = cast<SrcValueSDNode>(Op.getOperand(3));
|
|
SrcValueSDNode *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4));
|
|
|
|
SrcPtr = DAG.getLoad(getPointerTy(), Chain, SrcPtr,
|
|
SrcSV->getValue(), SrcSV->getOffset());
|
|
Chain = SrcPtr.getValue(1);
|
|
for (unsigned i = 0; i < 3; ++i) {
|
|
SDOperand Val = DAG.getLoad(MVT::i64, Chain, SrcPtr,
|
|
SrcSV->getValue(), SrcSV->getOffset());
|
|
Chain = Val.getValue(1);
|
|
Chain = DAG.getStore(Chain, Val, DstPtr,
|
|
DstSV->getValue(), DstSV->getOffset());
|
|
if (i == 2)
|
|
break;
|
|
SrcPtr = DAG.getNode(ISD::ADD, getPointerTy(), SrcPtr,
|
|
DAG.getConstant(8, getPointerTy()));
|
|
DstPtr = DAG.getNode(ISD::ADD, getPointerTy(), DstPtr,
|
|
DAG.getConstant(8, getPointerTy()));
|
|
}
|
|
return Chain;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG) {
|
|
unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getValue();
|
|
switch (IntNo) {
|
|
default: return SDOperand(); // Don't custom lower most intrinsics.
|
|
// Comparison intrinsics.
|
|
case Intrinsic::x86_sse_comieq_ss:
|
|
case Intrinsic::x86_sse_comilt_ss:
|
|
case Intrinsic::x86_sse_comile_ss:
|
|
case Intrinsic::x86_sse_comigt_ss:
|
|
case Intrinsic::x86_sse_comige_ss:
|
|
case Intrinsic::x86_sse_comineq_ss:
|
|
case Intrinsic::x86_sse_ucomieq_ss:
|
|
case Intrinsic::x86_sse_ucomilt_ss:
|
|
case Intrinsic::x86_sse_ucomile_ss:
|
|
case Intrinsic::x86_sse_ucomigt_ss:
|
|
case Intrinsic::x86_sse_ucomige_ss:
|
|
case Intrinsic::x86_sse_ucomineq_ss:
|
|
case Intrinsic::x86_sse2_comieq_sd:
|
|
case Intrinsic::x86_sse2_comilt_sd:
|
|
case Intrinsic::x86_sse2_comile_sd:
|
|
case Intrinsic::x86_sse2_comigt_sd:
|
|
case Intrinsic::x86_sse2_comige_sd:
|
|
case Intrinsic::x86_sse2_comineq_sd:
|
|
case Intrinsic::x86_sse2_ucomieq_sd:
|
|
case Intrinsic::x86_sse2_ucomilt_sd:
|
|
case Intrinsic::x86_sse2_ucomile_sd:
|
|
case Intrinsic::x86_sse2_ucomigt_sd:
|
|
case Intrinsic::x86_sse2_ucomige_sd:
|
|
case Intrinsic::x86_sse2_ucomineq_sd: {
|
|
unsigned Opc = 0;
|
|
ISD::CondCode CC = ISD::SETCC_INVALID;
|
|
switch (IntNo) {
|
|
default: break;
|
|
case Intrinsic::x86_sse_comieq_ss:
|
|
case Intrinsic::x86_sse2_comieq_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETEQ;
|
|
break;
|
|
case Intrinsic::x86_sse_comilt_ss:
|
|
case Intrinsic::x86_sse2_comilt_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETLT;
|
|
break;
|
|
case Intrinsic::x86_sse_comile_ss:
|
|
case Intrinsic::x86_sse2_comile_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETLE;
|
|
break;
|
|
case Intrinsic::x86_sse_comigt_ss:
|
|
case Intrinsic::x86_sse2_comigt_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETGT;
|
|
break;
|
|
case Intrinsic::x86_sse_comige_ss:
|
|
case Intrinsic::x86_sse2_comige_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETGE;
|
|
break;
|
|
case Intrinsic::x86_sse_comineq_ss:
|
|
case Intrinsic::x86_sse2_comineq_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETNE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomieq_ss:
|
|
case Intrinsic::x86_sse2_ucomieq_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETEQ;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomilt_ss:
|
|
case Intrinsic::x86_sse2_ucomilt_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETLT;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomile_ss:
|
|
case Intrinsic::x86_sse2_ucomile_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETLE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomigt_ss:
|
|
case Intrinsic::x86_sse2_ucomigt_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETGT;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomige_ss:
|
|
case Intrinsic::x86_sse2_ucomige_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETGE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomineq_ss:
|
|
case Intrinsic::x86_sse2_ucomineq_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETNE;
|
|
break;
|
|
}
|
|
|
|
unsigned X86CC;
|
|
SDOperand LHS = Op.getOperand(1);
|
|
SDOperand RHS = Op.getOperand(2);
|
|
translateX86CC(CC, true, X86CC, LHS, RHS, DAG);
|
|
|
|
const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
|
|
SDOperand Ops1[] = { DAG.getEntryNode(), LHS, RHS };
|
|
SDOperand Cond = DAG.getNode(Opc, VTs, 2, Ops1, 3);
|
|
VTs = DAG.getNodeValueTypes(MVT::i8, MVT::Flag);
|
|
SDOperand Ops2[] = { DAG.getConstant(X86CC, MVT::i8), Cond };
|
|
SDOperand SetCC = DAG.getNode(X86ISD::SETCC, VTs, 2, Ops2, 2);
|
|
return DAG.getNode(ISD::ANY_EXTEND, MVT::i32, SetCC);
|
|
}
|
|
}
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG) {
|
|
// Depths > 0 not supported yet!
|
|
if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
|
|
return SDOperand();
|
|
|
|
// Just load the return address
|
|
SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
|
|
return DAG.getLoad(getPointerTy(), DAG.getEntryNode(), RetAddrFI, NULL, 0);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG) {
|
|
// Depths > 0 not supported yet!
|
|
if (cast<ConstantSDNode>(Op.getOperand(0))->getValue() > 0)
|
|
return SDOperand();
|
|
|
|
SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
|
|
return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
|
|
DAG.getConstant(4, getPointerTy()));
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDOperand Op,
|
|
SelectionDAG &DAG) {
|
|
// Is not yet supported on x86-64
|
|
if (Subtarget->is64Bit())
|
|
return SDOperand();
|
|
|
|
return DAG.getConstant(8, getPointerTy());
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerEH_RETURN(SDOperand Op, SelectionDAG &DAG)
|
|
{
|
|
assert(!Subtarget->is64Bit() &&
|
|
"Lowering of eh_return builtin is not supported yet on x86-64");
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand Offset = Op.getOperand(1);
|
|
SDOperand Handler = Op.getOperand(2);
|
|
|
|
SDOperand Frame = DAG.getRegister(RegInfo->getFrameRegister(MF),
|
|
getPointerTy());
|
|
|
|
SDOperand StoreAddr = DAG.getNode(ISD::SUB, getPointerTy(), Frame,
|
|
DAG.getConstant(-4UL, getPointerTy()));
|
|
StoreAddr = DAG.getNode(ISD::ADD, getPointerTy(), StoreAddr, Offset);
|
|
Chain = DAG.getStore(Chain, Handler, StoreAddr, NULL, 0);
|
|
Chain = DAG.getCopyToReg(Chain, X86::ECX, StoreAddr);
|
|
MF.addLiveOut(X86::ECX);
|
|
|
|
return DAG.getNode(X86ISD::EH_RETURN, MVT::Other,
|
|
Chain, DAG.getRegister(X86::ECX, getPointerTy()));
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerTRAMPOLINE(SDOperand Op,
|
|
SelectionDAG &DAG) {
|
|
SDOperand Root = Op.getOperand(0);
|
|
SDOperand Trmp = Op.getOperand(1); // trampoline
|
|
SDOperand FPtr = Op.getOperand(2); // nested function
|
|
SDOperand Nest = Op.getOperand(3); // 'nest' parameter value
|
|
|
|
SrcValueSDNode *TrmpSV = cast<SrcValueSDNode>(Op.getOperand(4));
|
|
|
|
if (Subtarget->is64Bit()) {
|
|
return SDOperand(); // not yet supported
|
|
} else {
|
|
Function *Func = (Function *)
|
|
cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
|
|
unsigned CC = Func->getCallingConv();
|
|
unsigned char NestReg;
|
|
|
|
switch (CC) {
|
|
default:
|
|
assert(0 && "Unsupported calling convention");
|
|
case CallingConv::C:
|
|
case CallingConv::Fast:
|
|
case CallingConv::X86_StdCall: {
|
|
// Pass 'nest' parameter in ECX.
|
|
// Must be kept in sync with X86CallingConv.td
|
|
NestReg = N86::ECX;
|
|
|
|
// Check that ECX wasn't needed by an 'inreg' parameter.
|
|
const FunctionType *FTy = Func->getFunctionType();
|
|
const ParamAttrsList *Attrs = FTy->getParamAttrs();
|
|
|
|
if (Attrs && !Func->isVarArg()) {
|
|
unsigned InRegCount = 0;
|
|
unsigned Idx = 1;
|
|
|
|
for (FunctionType::param_iterator I = FTy->param_begin(),
|
|
E = FTy->param_end(); I != E; ++I, ++Idx)
|
|
if (Attrs->paramHasAttr(Idx, ParamAttr::InReg))
|
|
// FIXME: should only count parameters that are lowered to integers.
|
|
InRegCount += (getTargetData()->getTypeSizeInBits(*I) + 31) / 32;
|
|
|
|
if (InRegCount > 2) {
|
|
cerr << "Nest register in use - reduce number of inreg parameters!\n";
|
|
abort();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case CallingConv::X86_FastCall:
|
|
// Pass 'nest' parameter in EAX.
|
|
// Must be kept in sync with X86CallingConv.td
|
|
NestReg = N86::EAX;
|
|
break;
|
|
}
|
|
|
|
SDOperand OutChains[4];
|
|
SDOperand Addr, Disp;
|
|
|
|
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(10, MVT::i32));
|
|
Disp = DAG.getNode(ISD::SUB, MVT::i32, FPtr, Addr);
|
|
|
|
const unsigned char MOV32ri = 0xB8;
|
|
const unsigned char JMP = 0xE9;
|
|
|
|
OutChains[0] = DAG.getStore(Root, DAG.getConstant(MOV32ri|NestReg, MVT::i8),
|
|
Trmp, TrmpSV->getValue(), TrmpSV->getOffset());
|
|
|
|
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(1, MVT::i32));
|
|
OutChains[1] = DAG.getStore(Root, Nest, Addr, TrmpSV->getValue(),
|
|
TrmpSV->getOffset() + 1, false, 1);
|
|
|
|
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(5, MVT::i32));
|
|
OutChains[2] = DAG.getStore(Root, DAG.getConstant(JMP, MVT::i8), Addr,
|
|
TrmpSV->getValue() + 5, TrmpSV->getOffset());
|
|
|
|
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(6, MVT::i32));
|
|
OutChains[3] = DAG.getStore(Root, Disp, Addr, TrmpSV->getValue(),
|
|
TrmpSV->getOffset() + 6, false, 1);
|
|
|
|
return DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 4);
|
|
}
|
|
}
|
|
|
|
/// LowerOperation - Provide custom lowering hooks for some operations.
|
|
///
|
|
SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
|
|
switch (Op.getOpcode()) {
|
|
default: assert(0 && "Should not custom lower this!");
|
|
case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
|
|
case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
|
|
case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
|
|
case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
|
|
case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
|
|
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
|
|
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
|
|
case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
|
|
case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
|
|
case ISD::SHL_PARTS:
|
|
case ISD::SRA_PARTS:
|
|
case ISD::SRL_PARTS: return LowerShift(Op, DAG);
|
|
case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
|
|
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
|
|
case ISD::FABS: return LowerFABS(Op, DAG);
|
|
case ISD::FNEG: return LowerFNEG(Op, DAG);
|
|
case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
|
|
case ISD::SETCC: return LowerSETCC(Op, DAG, DAG.getEntryNode());
|
|
case ISD::SELECT: return LowerSELECT(Op, DAG);
|
|
case ISD::BRCOND: return LowerBRCOND(Op, DAG);
|
|
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
|
|
case ISD::CALL: return LowerCALL(Op, DAG);
|
|
case ISD::RET: return LowerRET(Op, DAG);
|
|
case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG);
|
|
case ISD::MEMSET: return LowerMEMSET(Op, DAG);
|
|
case ISD::MEMCPY: return LowerMEMCPY(Op, DAG);
|
|
case ISD::READCYCLECOUNTER: return LowerREADCYCLCECOUNTER(Op, DAG);
|
|
case ISD::VASTART: return LowerVASTART(Op, DAG);
|
|
case ISD::VACOPY: return LowerVACOPY(Op, DAG);
|
|
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
|
|
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
|
|
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
|
|
case ISD::FRAME_TO_ARGS_OFFSET:
|
|
return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
|
|
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
|
|
case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
|
|
case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
|
|
}
|
|
return SDOperand();
|
|
}
|
|
|
|
const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
switch (Opcode) {
|
|
default: return NULL;
|
|
case X86ISD::SHLD: return "X86ISD::SHLD";
|
|
case X86ISD::SHRD: return "X86ISD::SHRD";
|
|
case X86ISD::FAND: return "X86ISD::FAND";
|
|
case X86ISD::FOR: return "X86ISD::FOR";
|
|
case X86ISD::FXOR: return "X86ISD::FXOR";
|
|
case X86ISD::FSRL: return "X86ISD::FSRL";
|
|
case X86ISD::FILD: return "X86ISD::FILD";
|
|
case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
|
|
case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
|
|
case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
|
|
case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
|
|
case X86ISD::FLD: return "X86ISD::FLD";
|
|
case X86ISD::FST: return "X86ISD::FST";
|
|
case X86ISD::FP_GET_RESULT: return "X86ISD::FP_GET_RESULT";
|
|
case X86ISD::FP_SET_RESULT: return "X86ISD::FP_SET_RESULT";
|
|
case X86ISD::CALL: return "X86ISD::CALL";
|
|
case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
|
|
case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
|
|
case X86ISD::CMP: return "X86ISD::CMP";
|
|
case X86ISD::COMI: return "X86ISD::COMI";
|
|
case X86ISD::UCOMI: return "X86ISD::UCOMI";
|
|
case X86ISD::SETCC: return "X86ISD::SETCC";
|
|
case X86ISD::CMOV: return "X86ISD::CMOV";
|
|
case X86ISD::BRCOND: return "X86ISD::BRCOND";
|
|
case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
|
|
case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
|
|
case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
|
|
case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
|
|
case X86ISD::Wrapper: return "X86ISD::Wrapper";
|
|
case X86ISD::S2VEC: return "X86ISD::S2VEC";
|
|
case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
|
|
case X86ISD::PINSRW: return "X86ISD::PINSRW";
|
|
case X86ISD::FMAX: return "X86ISD::FMAX";
|
|
case X86ISD::FMIN: return "X86ISD::FMIN";
|
|
case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
|
|
case X86ISD::FRCP: return "X86ISD::FRCP";
|
|
case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
|
|
case X86ISD::THREAD_POINTER: return "X86ISD::THREAD_POINTER";
|
|
case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
|
|
}
|
|
}
|
|
|
|
// isLegalAddressingMode - Return true if the addressing mode represented
|
|
// by AM is legal for this target, for a load/store of the specified type.
|
|
bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
|
|
const Type *Ty) const {
|
|
// X86 supports extremely general addressing modes.
|
|
|
|
// X86 allows a sign-extended 32-bit immediate field as a displacement.
|
|
if (AM.BaseOffs <= -(1LL << 32) || AM.BaseOffs >= (1LL << 32)-1)
|
|
return false;
|
|
|
|
if (AM.BaseGV) {
|
|
// X86-64 only supports addr of globals in small code model.
|
|
if (Subtarget->is64Bit() &&
|
|
getTargetMachine().getCodeModel() != CodeModel::Small)
|
|
return false;
|
|
|
|
// We can only fold this if we don't need a load either.
|
|
if (Subtarget->GVRequiresExtraLoad(AM.BaseGV, getTargetMachine(), false))
|
|
return false;
|
|
}
|
|
|
|
switch (AM.Scale) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
case 8:
|
|
// These scales always work.
|
|
break;
|
|
case 3:
|
|
case 5:
|
|
case 9:
|
|
// These scales are formed with basereg+scalereg. Only accept if there is
|
|
// no basereg yet.
|
|
if (AM.HasBaseReg)
|
|
return false;
|
|
break;
|
|
default: // Other stuff never works.
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/// isShuffleMaskLegal - Targets can use this to indicate that they only
|
|
/// support *some* VECTOR_SHUFFLE operations, those with specific masks.
|
|
/// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
|
|
/// are assumed to be legal.
|
|
bool
|
|
X86TargetLowering::isShuffleMaskLegal(SDOperand Mask, MVT::ValueType VT) const {
|
|
// Only do shuffles on 128-bit vector types for now.
|
|
if (MVT::getSizeInBits(VT) == 64) return false;
|
|
return (Mask.Val->getNumOperands() <= 4 ||
|
|
isIdentityMask(Mask.Val) ||
|
|
isIdentityMask(Mask.Val, true) ||
|
|
isSplatMask(Mask.Val) ||
|
|
isPSHUFHW_PSHUFLWMask(Mask.Val) ||
|
|
X86::isUNPCKLMask(Mask.Val) ||
|
|
X86::isUNPCKHMask(Mask.Val) ||
|
|
X86::isUNPCKL_v_undef_Mask(Mask.Val) ||
|
|
X86::isUNPCKH_v_undef_Mask(Mask.Val));
|
|
}
|
|
|
|
bool X86TargetLowering::isVectorClearMaskLegal(std::vector<SDOperand> &BVOps,
|
|
MVT::ValueType EVT,
|
|
SelectionDAG &DAG) const {
|
|
unsigned NumElts = BVOps.size();
|
|
// Only do shuffles on 128-bit vector types for now.
|
|
if (MVT::getSizeInBits(EVT) * NumElts == 64) return false;
|
|
if (NumElts == 2) return true;
|
|
if (NumElts == 4) {
|
|
return (isMOVLMask(&BVOps[0], 4) ||
|
|
isCommutedMOVL(&BVOps[0], 4, true) ||
|
|
isSHUFPMask(&BVOps[0], 4) ||
|
|
isCommutedSHUFP(&BVOps[0], 4));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86 Scheduler Hooks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
MachineBasicBlock *
|
|
X86TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
|
|
MachineBasicBlock *BB) {
|
|
const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
|
|
switch (MI->getOpcode()) {
|
|
default: assert(false && "Unexpected instr type to insert");
|
|
case X86::CMOV_FR32:
|
|
case X86::CMOV_FR64:
|
|
case X86::CMOV_V4F32:
|
|
case X86::CMOV_V2F64:
|
|
case X86::CMOV_V2I64: {
|
|
// To "insert" a SELECT_CC instruction, we actually have to insert the
|
|
// diamond control-flow pattern. The incoming instruction knows the
|
|
// destination vreg to set, the condition code register to branch on, the
|
|
// true/false values to select between, and a branch opcode to use.
|
|
const BasicBlock *LLVM_BB = BB->getBasicBlock();
|
|
ilist<MachineBasicBlock>::iterator It = BB;
|
|
++It;
|
|
|
|
// thisMBB:
|
|
// ...
|
|
// TrueVal = ...
|
|
// cmpTY ccX, r1, r2
|
|
// bCC copy1MBB
|
|
// fallthrough --> copy0MBB
|
|
MachineBasicBlock *thisMBB = BB;
|
|
MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
|
|
MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
|
|
unsigned Opc =
|
|
X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
|
|
BuildMI(BB, TII->get(Opc)).addMBB(sinkMBB);
|
|
MachineFunction *F = BB->getParent();
|
|
F->getBasicBlockList().insert(It, copy0MBB);
|
|
F->getBasicBlockList().insert(It, sinkMBB);
|
|
// Update machine-CFG edges by first adding all successors of the current
|
|
// block to the new block which will contain the Phi node for the select.
|
|
for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
|
|
e = BB->succ_end(); i != e; ++i)
|
|
sinkMBB->addSuccessor(*i);
|
|
// Next, remove all successors of the current block, and add the true
|
|
// and fallthrough blocks as its successors.
|
|
while(!BB->succ_empty())
|
|
BB->removeSuccessor(BB->succ_begin());
|
|
BB->addSuccessor(copy0MBB);
|
|
BB->addSuccessor(sinkMBB);
|
|
|
|
// copy0MBB:
|
|
// %FalseValue = ...
|
|
// # fallthrough to sinkMBB
|
|
BB = copy0MBB;
|
|
|
|
// Update machine-CFG edges
|
|
BB->addSuccessor(sinkMBB);
|
|
|
|
// sinkMBB:
|
|
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
|
|
// ...
|
|
BB = sinkMBB;
|
|
BuildMI(BB, TII->get(X86::PHI), MI->getOperand(0).getReg())
|
|
.addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
|
|
.addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
|
|
|
|
delete MI; // The pseudo instruction is gone now.
|
|
return BB;
|
|
}
|
|
|
|
case X86::FP32_TO_INT16_IN_MEM:
|
|
case X86::FP32_TO_INT32_IN_MEM:
|
|
case X86::FP32_TO_INT64_IN_MEM:
|
|
case X86::FP64_TO_INT16_IN_MEM:
|
|
case X86::FP64_TO_INT32_IN_MEM:
|
|
case X86::FP64_TO_INT64_IN_MEM: {
|
|
// Change the floating point control register to use "round towards zero"
|
|
// mode when truncating to an integer value.
|
|
MachineFunction *F = BB->getParent();
|
|
int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
|
|
addFrameReference(BuildMI(BB, TII->get(X86::FNSTCW16m)), CWFrameIdx);
|
|
|
|
// Load the old value of the high byte of the control word...
|
|
unsigned OldCW =
|
|
F->getSSARegMap()->createVirtualRegister(X86::GR16RegisterClass);
|
|
addFrameReference(BuildMI(BB, TII->get(X86::MOV16rm), OldCW), CWFrameIdx);
|
|
|
|
// Set the high part to be round to zero...
|
|
addFrameReference(BuildMI(BB, TII->get(X86::MOV16mi)), CWFrameIdx)
|
|
.addImm(0xC7F);
|
|
|
|
// Reload the modified control word now...
|
|
addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
|
|
|
|
// Restore the memory image of control word to original value
|
|
addFrameReference(BuildMI(BB, TII->get(X86::MOV16mr)), CWFrameIdx)
|
|
.addReg(OldCW);
|
|
|
|
// Get the X86 opcode to use.
|
|
unsigned Opc;
|
|
switch (MI->getOpcode()) {
|
|
default: assert(0 && "illegal opcode!");
|
|
case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
|
|
case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
|
|
case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
|
|
case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
|
|
case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
|
|
case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
|
|
}
|
|
|
|
X86AddressMode AM;
|
|
MachineOperand &Op = MI->getOperand(0);
|
|
if (Op.isRegister()) {
|
|
AM.BaseType = X86AddressMode::RegBase;
|
|
AM.Base.Reg = Op.getReg();
|
|
} else {
|
|
AM.BaseType = X86AddressMode::FrameIndexBase;
|
|
AM.Base.FrameIndex = Op.getFrameIndex();
|
|
}
|
|
Op = MI->getOperand(1);
|
|
if (Op.isImmediate())
|
|
AM.Scale = Op.getImm();
|
|
Op = MI->getOperand(2);
|
|
if (Op.isImmediate())
|
|
AM.IndexReg = Op.getImm();
|
|
Op = MI->getOperand(3);
|
|
if (Op.isGlobalAddress()) {
|
|
AM.GV = Op.getGlobal();
|
|
} else {
|
|
AM.Disp = Op.getImm();
|
|
}
|
|
addFullAddress(BuildMI(BB, TII->get(Opc)), AM)
|
|
.addReg(MI->getOperand(4).getReg());
|
|
|
|
// Reload the original control word now.
|
|
addFrameReference(BuildMI(BB, TII->get(X86::FLDCW16m)), CWFrameIdx);
|
|
|
|
delete MI; // The pseudo instruction is gone now.
|
|
return BB;
|
|
}
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86 Optimization Hooks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
|
|
uint64_t Mask,
|
|
uint64_t &KnownZero,
|
|
uint64_t &KnownOne,
|
|
const SelectionDAG &DAG,
|
|
unsigned Depth) const {
|
|
unsigned Opc = Op.getOpcode();
|
|
assert((Opc >= ISD::BUILTIN_OP_END ||
|
|
Opc == ISD::INTRINSIC_WO_CHAIN ||
|
|
Opc == ISD::INTRINSIC_W_CHAIN ||
|
|
Opc == ISD::INTRINSIC_VOID) &&
|
|
"Should use MaskedValueIsZero if you don't know whether Op"
|
|
" is a target node!");
|
|
|
|
KnownZero = KnownOne = 0; // Don't know anything.
|
|
switch (Opc) {
|
|
default: break;
|
|
case X86ISD::SETCC:
|
|
KnownZero |= (MVT::getIntVTBitMask(Op.getValueType()) ^ 1ULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// getShuffleScalarElt - Returns the scalar element that will make up the ith
|
|
/// element of the result of the vector shuffle.
|
|
static SDOperand getShuffleScalarElt(SDNode *N, unsigned i, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = N->getValueType(0);
|
|
SDOperand PermMask = N->getOperand(2);
|
|
unsigned NumElems = PermMask.getNumOperands();
|
|
SDOperand V = (i < NumElems) ? N->getOperand(0) : N->getOperand(1);
|
|
i %= NumElems;
|
|
if (V.getOpcode() == ISD::SCALAR_TO_VECTOR) {
|
|
return (i == 0)
|
|
? V.getOperand(0) : DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(VT));
|
|
} else if (V.getOpcode() == ISD::VECTOR_SHUFFLE) {
|
|
SDOperand Idx = PermMask.getOperand(i);
|
|
if (Idx.getOpcode() == ISD::UNDEF)
|
|
return DAG.getNode(ISD::UNDEF, MVT::getVectorElementType(VT));
|
|
return getShuffleScalarElt(V.Val,cast<ConstantSDNode>(Idx)->getValue(),DAG);
|
|
}
|
|
return SDOperand();
|
|
}
|
|
|
|
/// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
|
|
/// node is a GlobalAddress + an offset.
|
|
static bool isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) {
|
|
unsigned Opc = N->getOpcode();
|
|
if (Opc == X86ISD::Wrapper) {
|
|
if (dyn_cast<GlobalAddressSDNode>(N->getOperand(0))) {
|
|
GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
|
|
return true;
|
|
}
|
|
} else if (Opc == ISD::ADD) {
|
|
SDOperand N1 = N->getOperand(0);
|
|
SDOperand N2 = N->getOperand(1);
|
|
if (isGAPlusOffset(N1.Val, GA, Offset)) {
|
|
ConstantSDNode *V = dyn_cast<ConstantSDNode>(N2);
|
|
if (V) {
|
|
Offset += V->getSignExtended();
|
|
return true;
|
|
}
|
|
} else if (isGAPlusOffset(N2.Val, GA, Offset)) {
|
|
ConstantSDNode *V = dyn_cast<ConstantSDNode>(N1);
|
|
if (V) {
|
|
Offset += V->getSignExtended();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// isConsecutiveLoad - Returns true if N is loading from an address of Base
|
|
/// + Dist * Size.
|
|
static bool isConsecutiveLoad(SDNode *N, SDNode *Base, int Dist, int Size,
|
|
MachineFrameInfo *MFI) {
|
|
if (N->getOperand(0).Val != Base->getOperand(0).Val)
|
|
return false;
|
|
|
|
SDOperand Loc = N->getOperand(1);
|
|
SDOperand BaseLoc = Base->getOperand(1);
|
|
if (Loc.getOpcode() == ISD::FrameIndex) {
|
|
if (BaseLoc.getOpcode() != ISD::FrameIndex)
|
|
return false;
|
|
int FI = cast<FrameIndexSDNode>(Loc)->getIndex();
|
|
int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
|
|
int FS = MFI->getObjectSize(FI);
|
|
int BFS = MFI->getObjectSize(BFI);
|
|
if (FS != BFS || FS != Size) return false;
|
|
return MFI->getObjectOffset(FI) == (MFI->getObjectOffset(BFI) + Dist*Size);
|
|
} else {
|
|
GlobalValue *GV1 = NULL;
|
|
GlobalValue *GV2 = NULL;
|
|
int64_t Offset1 = 0;
|
|
int64_t Offset2 = 0;
|
|
bool isGA1 = isGAPlusOffset(Loc.Val, GV1, Offset1);
|
|
bool isGA2 = isGAPlusOffset(BaseLoc.Val, GV2, Offset2);
|
|
if (isGA1 && isGA2 && GV1 == GV2)
|
|
return Offset1 == (Offset2 + Dist*Size);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool isBaseAlignment16(SDNode *Base, MachineFrameInfo *MFI,
|
|
const X86Subtarget *Subtarget) {
|
|
GlobalValue *GV;
|
|
int64_t Offset;
|
|
if (isGAPlusOffset(Base, GV, Offset))
|
|
return (GV->getAlignment() >= 16 && (Offset % 16) == 0);
|
|
else {
|
|
assert(Base->getOpcode() == ISD::FrameIndex && "Unexpected base node!");
|
|
int BFI = cast<FrameIndexSDNode>(Base)->getIndex();
|
|
if (BFI < 0)
|
|
// Fixed objects do not specify alignment, however the offsets are known.
|
|
return ((Subtarget->getStackAlignment() % 16) == 0 &&
|
|
(MFI->getObjectOffset(BFI) % 16) == 0);
|
|
else
|
|
return MFI->getObjectAlignment(BFI) >= 16;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/// PerformShuffleCombine - Combine a vector_shuffle that is equal to
|
|
/// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
|
|
/// if the load addresses are consecutive, non-overlapping, and in the right
|
|
/// order.
|
|
static SDOperand PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
|
|
const X86Subtarget *Subtarget) {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
MVT::ValueType VT = N->getValueType(0);
|
|
MVT::ValueType EVT = MVT::getVectorElementType(VT);
|
|
SDOperand PermMask = N->getOperand(2);
|
|
int NumElems = (int)PermMask.getNumOperands();
|
|
SDNode *Base = NULL;
|
|
for (int i = 0; i < NumElems; ++i) {
|
|
SDOperand Idx = PermMask.getOperand(i);
|
|
if (Idx.getOpcode() == ISD::UNDEF) {
|
|
if (!Base) return SDOperand();
|
|
} else {
|
|
SDOperand Arg =
|
|
getShuffleScalarElt(N, cast<ConstantSDNode>(Idx)->getValue(), DAG);
|
|
if (!Arg.Val || !ISD::isNON_EXTLoad(Arg.Val))
|
|
return SDOperand();
|
|
if (!Base)
|
|
Base = Arg.Val;
|
|
else if (!isConsecutiveLoad(Arg.Val, Base,
|
|
i, MVT::getSizeInBits(EVT)/8,MFI))
|
|
return SDOperand();
|
|
}
|
|
}
|
|
|
|
bool isAlign16 = isBaseAlignment16(Base->getOperand(1).Val, MFI, Subtarget);
|
|
LoadSDNode *LD = cast<LoadSDNode>(Base);
|
|
if (isAlign16) {
|
|
return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
|
|
LD->getSrcValueOffset(), LD->isVolatile());
|
|
} else {
|
|
return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
|
|
LD->getSrcValueOffset(), LD->isVolatile(),
|
|
LD->getAlignment());
|
|
}
|
|
}
|
|
|
|
/// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
|
|
static SDOperand PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
|
|
const X86Subtarget *Subtarget) {
|
|
SDOperand Cond = N->getOperand(0);
|
|
|
|
// If we have SSE[12] support, try to form min/max nodes.
|
|
if (Subtarget->hasSSE2() &&
|
|
(N->getValueType(0) == MVT::f32 || N->getValueType(0) == MVT::f64)) {
|
|
if (Cond.getOpcode() == ISD::SETCC) {
|
|
// Get the LHS/RHS of the select.
|
|
SDOperand LHS = N->getOperand(1);
|
|
SDOperand RHS = N->getOperand(2);
|
|
ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
|
|
|
|
unsigned Opcode = 0;
|
|
if (LHS == Cond.getOperand(0) && RHS == Cond.getOperand(1)) {
|
|
switch (CC) {
|
|
default: break;
|
|
case ISD::SETOLE: // (X <= Y) ? X : Y -> min
|
|
case ISD::SETULE:
|
|
case ISD::SETLE:
|
|
if (!UnsafeFPMath) break;
|
|
// FALL THROUGH.
|
|
case ISD::SETOLT: // (X olt/lt Y) ? X : Y -> min
|
|
case ISD::SETLT:
|
|
Opcode = X86ISD::FMIN;
|
|
break;
|
|
|
|
case ISD::SETOGT: // (X > Y) ? X : Y -> max
|
|
case ISD::SETUGT:
|
|
case ISD::SETGT:
|
|
if (!UnsafeFPMath) break;
|
|
// FALL THROUGH.
|
|
case ISD::SETUGE: // (X uge/ge Y) ? X : Y -> max
|
|
case ISD::SETGE:
|
|
Opcode = X86ISD::FMAX;
|
|
break;
|
|
}
|
|
} else if (LHS == Cond.getOperand(1) && RHS == Cond.getOperand(0)) {
|
|
switch (CC) {
|
|
default: break;
|
|
case ISD::SETOGT: // (X > Y) ? Y : X -> min
|
|
case ISD::SETUGT:
|
|
case ISD::SETGT:
|
|
if (!UnsafeFPMath) break;
|
|
// FALL THROUGH.
|
|
case ISD::SETUGE: // (X uge/ge Y) ? Y : X -> min
|
|
case ISD::SETGE:
|
|
Opcode = X86ISD::FMIN;
|
|
break;
|
|
|
|
case ISD::SETOLE: // (X <= Y) ? Y : X -> max
|
|
case ISD::SETULE:
|
|
case ISD::SETLE:
|
|
if (!UnsafeFPMath) break;
|
|
// FALL THROUGH.
|
|
case ISD::SETOLT: // (X olt/lt Y) ? Y : X -> max
|
|
case ISD::SETLT:
|
|
Opcode = X86ISD::FMAX;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Opcode)
|
|
return DAG.getNode(Opcode, N->getValueType(0), LHS, RHS);
|
|
}
|
|
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
|
|
SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N,
|
|
DAGCombinerInfo &DCI) const {
|
|
SelectionDAG &DAG = DCI.DAG;
|
|
switch (N->getOpcode()) {
|
|
default: break;
|
|
case ISD::VECTOR_SHUFFLE:
|
|
return PerformShuffleCombine(N, DAG, Subtarget);
|
|
case ISD::SELECT:
|
|
return PerformSELECTCombine(N, DAG, Subtarget);
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86 Inline Assembly Support
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// getConstraintType - Given a constraint letter, return the type of
|
|
/// constraint it is for this target.
|
|
X86TargetLowering::ConstraintType
|
|
X86TargetLowering::getConstraintType(const std::string &Constraint) const {
|
|
if (Constraint.size() == 1) {
|
|
switch (Constraint[0]) {
|
|
case 'A':
|
|
case 'r':
|
|
case 'R':
|
|
case 'l':
|
|
case 'q':
|
|
case 'Q':
|
|
case 'x':
|
|
case 'Y':
|
|
return C_RegisterClass;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return TargetLowering::getConstraintType(Constraint);
|
|
}
|
|
|
|
/// isOperandValidForConstraint - Return the specified operand (possibly
|
|
/// modified) if the specified SDOperand is valid for the specified target
|
|
/// constraint letter, otherwise return null.
|
|
SDOperand X86TargetLowering::
|
|
isOperandValidForConstraint(SDOperand Op, char Constraint, SelectionDAG &DAG) {
|
|
switch (Constraint) {
|
|
default: break;
|
|
case 'I':
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
|
|
if (C->getValue() <= 31)
|
|
return DAG.getTargetConstant(C->getValue(), Op.getValueType());
|
|
}
|
|
return SDOperand(0,0);
|
|
case 'N':
|
|
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
|
|
if (C->getValue() <= 255)
|
|
return DAG.getTargetConstant(C->getValue(), Op.getValueType());
|
|
}
|
|
return SDOperand(0,0);
|
|
case 'i': {
|
|
// Literal immediates are always ok.
|
|
if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op))
|
|
return DAG.getTargetConstant(CST->getValue(), Op.getValueType());
|
|
|
|
// If we are in non-pic codegen mode, we allow the address of a global (with
|
|
// an optional displacement) to be used with 'i'.
|
|
GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op);
|
|
int64_t Offset = 0;
|
|
|
|
// Match either (GA) or (GA+C)
|
|
if (GA) {
|
|
Offset = GA->getOffset();
|
|
} else if (Op.getOpcode() == ISD::ADD) {
|
|
ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
|
|
GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
|
|
if (C && GA) {
|
|
Offset = GA->getOffset()+C->getValue();
|
|
} else {
|
|
C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
|
|
GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
|
|
if (C && GA)
|
|
Offset = GA->getOffset()+C->getValue();
|
|
else
|
|
C = 0, GA = 0;
|
|
}
|
|
}
|
|
|
|
if (GA) {
|
|
// If addressing this global requires a load (e.g. in PIC mode), we can't
|
|
// match.
|
|
if (Subtarget->GVRequiresExtraLoad(GA->getGlobal(), getTargetMachine(),
|
|
false))
|
|
return SDOperand(0, 0);
|
|
|
|
Op = DAG.getTargetGlobalAddress(GA->getGlobal(), GA->getValueType(0),
|
|
Offset);
|
|
return Op;
|
|
}
|
|
|
|
// Otherwise, not valid for this mode.
|
|
return SDOperand(0, 0);
|
|
}
|
|
}
|
|
return TargetLowering::isOperandValidForConstraint(Op, Constraint, DAG);
|
|
}
|
|
|
|
std::vector<unsigned> X86TargetLowering::
|
|
getRegClassForInlineAsmConstraint(const std::string &Constraint,
|
|
MVT::ValueType VT) const {
|
|
if (Constraint.size() == 1) {
|
|
// FIXME: not handling fp-stack yet!
|
|
switch (Constraint[0]) { // GCC X86 Constraint Letters
|
|
default: break; // Unknown constraint letter
|
|
case 'A': // EAX/EDX
|
|
if (VT == MVT::i32 || VT == MVT::i64)
|
|
return make_vector<unsigned>(X86::EAX, X86::EDX, 0);
|
|
break;
|
|
case 'q': // Q_REGS (GENERAL_REGS in 64-bit mode)
|
|
case 'Q': // Q_REGS
|
|
if (VT == MVT::i32)
|
|
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
|
|
else if (VT == MVT::i16)
|
|
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
|
|
else if (VT == MVT::i8)
|
|
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return std::vector<unsigned>();
|
|
}
|
|
|
|
std::pair<unsigned, const TargetRegisterClass*>
|
|
X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
|
|
MVT::ValueType VT) const {
|
|
// First, see if this is a constraint that directly corresponds to an LLVM
|
|
// register class.
|
|
if (Constraint.size() == 1) {
|
|
// GCC Constraint Letters
|
|
switch (Constraint[0]) {
|
|
default: break;
|
|
case 'r': // GENERAL_REGS
|
|
case 'R': // LEGACY_REGS
|
|
case 'l': // INDEX_REGS
|
|
if (VT == MVT::i64 && Subtarget->is64Bit())
|
|
return std::make_pair(0U, X86::GR64RegisterClass);
|
|
if (VT == MVT::i32)
|
|
return std::make_pair(0U, X86::GR32RegisterClass);
|
|
else if (VT == MVT::i16)
|
|
return std::make_pair(0U, X86::GR16RegisterClass);
|
|
else if (VT == MVT::i8)
|
|
return std::make_pair(0U, X86::GR8RegisterClass);
|
|
break;
|
|
case 'y': // MMX_REGS if MMX allowed.
|
|
if (!Subtarget->hasMMX()) break;
|
|
return std::make_pair(0U, X86::VR64RegisterClass);
|
|
break;
|
|
case 'Y': // SSE_REGS if SSE2 allowed
|
|
if (!Subtarget->hasSSE2()) break;
|
|
// FALL THROUGH.
|
|
case 'x': // SSE_REGS if SSE1 allowed
|
|
if (!Subtarget->hasSSE1()) break;
|
|
|
|
switch (VT) {
|
|
default: break;
|
|
// Scalar SSE types.
|
|
case MVT::f32:
|
|
case MVT::i32:
|
|
return std::make_pair(0U, X86::FR32RegisterClass);
|
|
case MVT::f64:
|
|
case MVT::i64:
|
|
return std::make_pair(0U, X86::FR64RegisterClass);
|
|
// Vector types.
|
|
case MVT::v16i8:
|
|
case MVT::v8i16:
|
|
case MVT::v4i32:
|
|
case MVT::v2i64:
|
|
case MVT::v4f32:
|
|
case MVT::v2f64:
|
|
return std::make_pair(0U, X86::VR128RegisterClass);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Use the default implementation in TargetLowering to convert the register
|
|
// constraint into a member of a register class.
|
|
std::pair<unsigned, const TargetRegisterClass*> Res;
|
|
Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
|
|
|
|
// Not found as a standard register?
|
|
if (Res.second == 0) {
|
|
// GCC calls "st(0)" just plain "st".
|
|
if (StringsEqualNoCase("{st}", Constraint)) {
|
|
Res.first = X86::ST0;
|
|
Res.second = X86::RSTRegisterClass;
|
|
}
|
|
|
|
return Res;
|
|
}
|
|
|
|
// Otherwise, check to see if this is a register class of the wrong value
|
|
// type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
|
|
// turn into {ax},{dx}.
|
|
if (Res.second->hasType(VT))
|
|
return Res; // Correct type already, nothing to do.
|
|
|
|
// All of the single-register GCC register classes map their values onto
|
|
// 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
|
|
// really want an 8-bit or 32-bit register, map to the appropriate register
|
|
// class and return the appropriate register.
|
|
if (Res.second != X86::GR16RegisterClass)
|
|
return Res;
|
|
|
|
if (VT == MVT::i8) {
|
|
unsigned DestReg = 0;
|
|
switch (Res.first) {
|
|
default: break;
|
|
case X86::AX: DestReg = X86::AL; break;
|
|
case X86::DX: DestReg = X86::DL; break;
|
|
case X86::CX: DestReg = X86::CL; break;
|
|
case X86::BX: DestReg = X86::BL; break;
|
|
}
|
|
if (DestReg) {
|
|
Res.first = DestReg;
|
|
Res.second = Res.second = X86::GR8RegisterClass;
|
|
}
|
|
} else if (VT == MVT::i32) {
|
|
unsigned DestReg = 0;
|
|
switch (Res.first) {
|
|
default: break;
|
|
case X86::AX: DestReg = X86::EAX; break;
|
|
case X86::DX: DestReg = X86::EDX; break;
|
|
case X86::CX: DestReg = X86::ECX; break;
|
|
case X86::BX: DestReg = X86::EBX; break;
|
|
case X86::SI: DestReg = X86::ESI; break;
|
|
case X86::DI: DestReg = X86::EDI; break;
|
|
case X86::BP: DestReg = X86::EBP; break;
|
|
case X86::SP: DestReg = X86::ESP; break;
|
|
}
|
|
if (DestReg) {
|
|
Res.first = DestReg;
|
|
Res.second = Res.second = X86::GR32RegisterClass;
|
|
}
|
|
} else if (VT == MVT::i64) {
|
|
unsigned DestReg = 0;
|
|
switch (Res.first) {
|
|
default: break;
|
|
case X86::AX: DestReg = X86::RAX; break;
|
|
case X86::DX: DestReg = X86::RDX; break;
|
|
case X86::CX: DestReg = X86::RCX; break;
|
|
case X86::BX: DestReg = X86::RBX; break;
|
|
case X86::SI: DestReg = X86::RSI; break;
|
|
case X86::DI: DestReg = X86::RDI; break;
|
|
case X86::BP: DestReg = X86::RBP; break;
|
|
case X86::SP: DestReg = X86::RSP; break;
|
|
}
|
|
if (DestReg) {
|
|
Res.first = DestReg;
|
|
Res.second = Res.second = X86::GR64RegisterClass;
|
|
}
|
|
}
|
|
|
|
return Res;
|
|
}
|