mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-20 11:29:24 +00:00
* Teach DAG combiner about X86ISD::SETCC by adding a TargetLowering hook. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24921 91177308-0d34-0410-b5e6-96231b3b80d8
1106 lines
41 KiB
C++
1106 lines
41 KiB
C++
//===-- X86ISelLowering.h - X86 DAG Lowering Interface ----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by Chris Lattner and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the interfaces that X86 uses to lower LLVM code into a
|
|
// selection DAG.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86.h"
|
|
#include "X86ISelLowering.h"
|
|
#include "X86TargetMachine.h"
|
|
#include "llvm/CallingConv.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/SelectionDAG.h"
|
|
#include "llvm/CodeGen/SSARegMap.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
using namespace llvm;
|
|
|
|
// FIXME: temporary.
|
|
#include "llvm/Support/CommandLine.h"
|
|
static cl::opt<bool> EnableFastCC("enable-x86-fastcc", cl::Hidden,
|
|
cl::desc("Enable fastcc on X86"));
|
|
|
|
X86TargetLowering::X86TargetLowering(TargetMachine &TM)
|
|
: TargetLowering(TM) {
|
|
// Set up the TargetLowering object.
|
|
|
|
// X86 is weird, it always uses i8 for shift amounts and setcc results.
|
|
setShiftAmountType(MVT::i8);
|
|
setSetCCResultType(MVT::i8);
|
|
setSetCCResultContents(ZeroOrOneSetCCResult);
|
|
setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
|
|
|
|
// Set up the register classes.
|
|
addRegisterClass(MVT::i8, X86::R8RegisterClass);
|
|
addRegisterClass(MVT::i16, X86::R16RegisterClass);
|
|
addRegisterClass(MVT::i32, X86::R32RegisterClass);
|
|
|
|
// Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
|
|
// operation.
|
|
setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
|
|
setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
|
|
setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
|
|
setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
|
|
|
|
// Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
|
|
// this operation.
|
|
setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
|
|
setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
|
|
|
|
if (!X86ScalarSSE) {
|
|
// We can handle SINT_TO_FP and FP_TO_SINT from/TO i64 even though i64
|
|
// isn't legal.
|
|
setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
|
|
}
|
|
|
|
// Handle FP_TO_UINT by promoting the destination to a larger signed
|
|
// conversion.
|
|
setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
|
|
setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
|
|
setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
|
|
|
|
if (!X86ScalarSSE)
|
|
setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
|
|
|
|
// Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
|
|
// this operation.
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
|
|
setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
|
|
|
|
if (X86DAGIsel) {
|
|
setOperationAction(ISD::BRCOND , MVT::Other, Custom);
|
|
}
|
|
setOperationAction(ISD::BRCONDTWOWAY , MVT::Other, Expand);
|
|
setOperationAction(ISD::BRTWOWAY_CC , MVT::Other, Expand);
|
|
setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
|
|
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Expand);
|
|
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
|
|
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
|
|
setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
|
|
setOperationAction(ISD::SEXTLOAD , MVT::i1 , Expand);
|
|
setOperationAction(ISD::FREM , MVT::f64 , Expand);
|
|
setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
|
|
setOperationAction(ISD::CTTZ , MVT::i8 , Expand);
|
|
setOperationAction(ISD::CTLZ , MVT::i8 , Expand);
|
|
setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
|
|
setOperationAction(ISD::CTTZ , MVT::i16 , Expand);
|
|
setOperationAction(ISD::CTLZ , MVT::i16 , Expand);
|
|
setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
|
|
setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
|
|
setOperationAction(ISD::CTLZ , MVT::i32 , Expand);
|
|
setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
|
|
|
|
setOperationAction(ISD::READIO , MVT::i1 , Expand);
|
|
setOperationAction(ISD::READIO , MVT::i8 , Expand);
|
|
setOperationAction(ISD::READIO , MVT::i16 , Expand);
|
|
setOperationAction(ISD::READIO , MVT::i32 , Expand);
|
|
setOperationAction(ISD::WRITEIO , MVT::i1 , Expand);
|
|
setOperationAction(ISD::WRITEIO , MVT::i8 , Expand);
|
|
setOperationAction(ISD::WRITEIO , MVT::i16 , Expand);
|
|
setOperationAction(ISD::WRITEIO , MVT::i32 , Expand);
|
|
|
|
// These should be promoted to a larger select which is supported.
|
|
setOperationAction(ISD::SELECT , MVT::i1 , Promote);
|
|
setOperationAction(ISD::SELECT , MVT::i8 , Promote);
|
|
// X86 wants to expand cmov itself.
|
|
if (X86DAGIsel) {
|
|
setOperationAction(ISD::SELECT , MVT::i16 , Custom);
|
|
setOperationAction(ISD::SELECT , MVT::i32 , Custom);
|
|
setOperationAction(ISD::SETCC , MVT::i8 , Custom);
|
|
setOperationAction(ISD::SETCC , MVT::i16 , Custom);
|
|
setOperationAction(ISD::SETCC , MVT::i32 , Custom);
|
|
setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
|
|
}
|
|
|
|
// We don't have line number support yet.
|
|
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
|
|
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
|
|
|
|
if (X86ScalarSSE) {
|
|
// Set up the FP register classes.
|
|
addRegisterClass(MVT::f32, X86::V4F4RegisterClass);
|
|
addRegisterClass(MVT::f64, X86::V2F8RegisterClass);
|
|
|
|
// SSE has no load+extend ops
|
|
setOperationAction(ISD::EXTLOAD, MVT::f32, Expand);
|
|
setOperationAction(ISD::ZEXTLOAD, MVT::f32, Expand);
|
|
|
|
// SSE has no i16 to fp conversion, only i32
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i16, Promote);
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i16, Promote);
|
|
|
|
// Expand FP_TO_UINT into a select.
|
|
// FIXME: We would like to use a Custom expander here eventually to do
|
|
// the optimal thing for SSE vs. the default expansion in the legalizer.
|
|
setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
|
|
|
|
// We don't support sin/cos/sqrt/fmod
|
|
setOperationAction(ISD::FSIN , MVT::f64, Expand);
|
|
setOperationAction(ISD::FCOS , MVT::f64, Expand);
|
|
setOperationAction(ISD::FABS , MVT::f64, Expand);
|
|
setOperationAction(ISD::FNEG , MVT::f64, Expand);
|
|
setOperationAction(ISD::FREM , MVT::f64, Expand);
|
|
setOperationAction(ISD::FSIN , MVT::f32, Expand);
|
|
setOperationAction(ISD::FCOS , MVT::f32, Expand);
|
|
setOperationAction(ISD::FABS , MVT::f32, Expand);
|
|
setOperationAction(ISD::FNEG , MVT::f32, Expand);
|
|
setOperationAction(ISD::FREM , MVT::f32, Expand);
|
|
|
|
addLegalFPImmediate(+0.0); // xorps / xorpd
|
|
} else {
|
|
// Set up the FP register classes.
|
|
addRegisterClass(MVT::f64, X86::RFPRegisterClass);
|
|
|
|
if (!UnsafeFPMath) {
|
|
setOperationAction(ISD::FSIN , MVT::f64 , Expand);
|
|
setOperationAction(ISD::FCOS , MVT::f64 , Expand);
|
|
}
|
|
|
|
addLegalFPImmediate(+0.0); // FLD0
|
|
addLegalFPImmediate(+1.0); // FLD1
|
|
addLegalFPImmediate(-0.0); // FLD0/FCHS
|
|
addLegalFPImmediate(-1.0); // FLD1/FCHS
|
|
}
|
|
computeRegisterProperties();
|
|
|
|
maxStoresPerMemSet = 8; // For %llvm.memset -> sequence of stores
|
|
maxStoresPerMemCpy = 8; // For %llvm.memcpy -> sequence of stores
|
|
maxStoresPerMemMove = 8; // For %llvm.memmove -> sequence of stores
|
|
allowUnalignedMemoryAccesses = true; // x86 supports it!
|
|
}
|
|
|
|
std::vector<SDOperand>
|
|
X86TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
|
|
if (F.getCallingConv() == CallingConv::Fast && EnableFastCC)
|
|
return LowerFastCCArguments(F, DAG);
|
|
return LowerCCCArguments(F, DAG);
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isVarArg, unsigned CallingConv,
|
|
bool isTailCall,
|
|
SDOperand Callee, ArgListTy &Args,
|
|
SelectionDAG &DAG) {
|
|
assert((!isVarArg || CallingConv == CallingConv::C) &&
|
|
"Only C takes varargs!");
|
|
if (CallingConv == CallingConv::Fast && EnableFastCC)
|
|
return LowerFastCCCallTo(Chain, RetTy, isTailCall, Callee, Args, DAG);
|
|
return LowerCCCCallTo(Chain, RetTy, isVarArg, isTailCall, Callee, Args, DAG);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerReturnTo(SDOperand Chain, SDOperand Op,
|
|
SelectionDAG &DAG) {
|
|
if (!X86DAGIsel)
|
|
return DAG.getNode(ISD::RET, MVT::Other, Chain, Op);
|
|
|
|
SDOperand Copy;
|
|
MVT::ValueType OpVT = Op.getValueType();
|
|
switch (OpVT) {
|
|
default: assert(0 && "Unknown type to return!");
|
|
case MVT::i32:
|
|
Copy = DAG.getCopyToReg(Chain, X86::EAX, Op, SDOperand());
|
|
break;
|
|
case MVT::i64: {
|
|
SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op,
|
|
DAG.getConstant(1, MVT::i32));
|
|
SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Op,
|
|
DAG.getConstant(0, MVT::i32));
|
|
Copy = DAG.getCopyToReg(Chain, X86::EAX, Hi, SDOperand());
|
|
Copy = DAG.getCopyToReg(Copy, X86::EDX, Lo, Copy.getValue(1));
|
|
break;
|
|
}
|
|
case MVT::f32:
|
|
assert(X86ScalarSSE && "MVT::f32 only legal with scalar sse fp");
|
|
// Fallthrough intended
|
|
case MVT::f64:
|
|
if (!X86ScalarSSE) {
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Op);
|
|
Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
|
|
} else {
|
|
// Spill the value to memory and reload it into top of stack.
|
|
unsigned Size = MVT::getSizeInBits(OpVT)/8;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Op,
|
|
StackSlot, DAG.getSrcValue(NULL));
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(OpVT));
|
|
Copy = DAG.getNode(X86ISD::FLD, Tys, Ops);
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Copy.getValue(1));
|
|
Ops.push_back(Copy);
|
|
Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other,
|
|
Copy, DAG.getConstant(getBytesToPopOnReturn(), MVT::i16),
|
|
Copy.getValue(1));
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// C Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
std::vector<SDOperand>
|
|
X86TargetLowering::LowerCCCArguments(Function &F, SelectionDAG &DAG) {
|
|
std::vector<SDOperand> ArgValues;
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
// Add DAG nodes to load the arguments... On entry to a function on the X86,
|
|
// the stack frame looks like this:
|
|
//
|
|
// [ESP] -- return address
|
|
// [ESP + 4] -- first argument (leftmost lexically)
|
|
// [ESP + 8] -- second argument, if first argument is four bytes in size
|
|
// ...
|
|
//
|
|
unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
|
|
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
|
|
MVT::ValueType ObjectVT = getValueType(I->getType());
|
|
unsigned ArgIncrement = 4;
|
|
unsigned ObjSize;
|
|
switch (ObjectVT) {
|
|
default: assert(0 && "Unhandled argument type!");
|
|
case MVT::i1:
|
|
case MVT::i8: ObjSize = 1; break;
|
|
case MVT::i16: ObjSize = 2; break;
|
|
case MVT::i32: ObjSize = 4; break;
|
|
case MVT::i64: ObjSize = ArgIncrement = 8; break;
|
|
case MVT::f32: ObjSize = 4; break;
|
|
case MVT::f64: ObjSize = ArgIncrement = 8; break;
|
|
}
|
|
// Create the frame index object for this incoming parameter...
|
|
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
|
|
|
|
// Create the SelectionDAG nodes corresponding to a load from this parameter
|
|
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
|
|
// Don't codegen dead arguments. FIXME: remove this check when we can nuke
|
|
// dead loads.
|
|
SDOperand ArgValue;
|
|
if (!I->use_empty())
|
|
ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN,
|
|
DAG.getSrcValue(NULL));
|
|
else {
|
|
if (MVT::isInteger(ObjectVT))
|
|
ArgValue = DAG.getConstant(0, ObjectVT);
|
|
else
|
|
ArgValue = DAG.getConstantFP(0, ObjectVT);
|
|
}
|
|
ArgValues.push_back(ArgValue);
|
|
|
|
ArgOffset += ArgIncrement; // Move on to the next argument...
|
|
}
|
|
|
|
// 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 (F.isVarArg())
|
|
VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = 0; // Callee pops nothing.
|
|
BytesCallerReserves = ArgOffset;
|
|
|
|
// Finally, inform the code generator which regs we return values in.
|
|
switch (getValueType(F.getReturnType())) {
|
|
default: assert(0 && "Unknown type!");
|
|
case MVT::isVoid: break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
MF.addLiveOut(X86::EAX);
|
|
break;
|
|
case MVT::i64:
|
|
MF.addLiveOut(X86::EAX);
|
|
MF.addLiveOut(X86::EDX);
|
|
break;
|
|
case MVT::f32:
|
|
case MVT::f64:
|
|
MF.addLiveOut(X86::ST0);
|
|
break;
|
|
}
|
|
return ArgValues;
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerCCCCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isVarArg, bool isTailCall,
|
|
SDOperand Callee, ArgListTy &Args,
|
|
SelectionDAG &DAG) {
|
|
// Count how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = 0;
|
|
|
|
if (Args.empty()) {
|
|
// Save zero bytes.
|
|
Chain = DAG.getNode(ISD::CALLSEQ_START, MVT::Other, Chain,
|
|
DAG.getConstant(0, getPointerTy()));
|
|
} else {
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i)
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unknown value type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
case MVT::f32:
|
|
NumBytes += 4;
|
|
break;
|
|
case MVT::i64:
|
|
case MVT::f64:
|
|
NumBytes += 8;
|
|
break;
|
|
}
|
|
|
|
Chain = DAG.getNode(ISD::CALLSEQ_START, MVT::Other, Chain,
|
|
DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
// Arguments go on the stack in reverse order, as specified by the ABI.
|
|
unsigned ArgOffset = 0;
|
|
SDOperand StackPtr = DAG.getCopyFromReg(DAG.getEntryNode(),
|
|
X86::ESP, MVT::i32);
|
|
std::vector<SDOperand> Stores;
|
|
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i) {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unexpected ValueType for argument!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
// Promote the integer to 32 bits. If the input type is signed use a
|
|
// sign extend, otherwise use a zero extend.
|
|
if (Args[i].second->isSigned())
|
|
Args[i].first =DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Args[i].first);
|
|
else
|
|
Args[i].first =DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Args[i].first);
|
|
|
|
// FALL THROUGH
|
|
case MVT::i32:
|
|
case MVT::f32:
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
break;
|
|
case MVT::i64:
|
|
case MVT::f64:
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 8;
|
|
break;
|
|
}
|
|
}
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
|
|
}
|
|
|
|
std::vector<MVT::ValueType> RetVals;
|
|
MVT::ValueType RetTyVT = getValueType(RetTy);
|
|
RetVals.push_back(MVT::Other);
|
|
|
|
// The result values produced have to be legal. Promote the result.
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
RetVals.push_back(RetTyVT);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
case MVT::f32:
|
|
if (X86ScalarSSE)
|
|
RetVals.push_back(MVT::f32);
|
|
else
|
|
RetVals.push_back(MVT::f64);
|
|
break;
|
|
case MVT::i64:
|
|
RetVals.push_back(MVT::i32);
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
}
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(0, getPointerTy()));
|
|
SDOperand TheCall = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
RetVals, Ops);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, TheCall);
|
|
|
|
SDOperand ResultVal;
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
ResultVal = TheCall.getValue(1);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
ResultVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, TheCall.getValue(1));
|
|
break;
|
|
case MVT::f32:
|
|
// FIXME: we would really like to remember that this FP_ROUND operation is
|
|
// okay to eliminate if we allow excess FP precision.
|
|
ResultVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, TheCall.getValue(1));
|
|
break;
|
|
case MVT::i64:
|
|
ResultVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, TheCall.getValue(1),
|
|
TheCall.getValue(2));
|
|
break;
|
|
}
|
|
|
|
return std::make_pair(ResultVal, Chain);
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerVAStart(SDOperand Chain, SDOperand VAListP,
|
|
Value *VAListV, SelectionDAG &DAG) {
|
|
// vastart just stores the address of the VarArgsFrameIndex slot.
|
|
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, MVT::i32);
|
|
return DAG.getNode(ISD::STORE, MVT::Other, Chain, FR, VAListP,
|
|
DAG.getSrcValue(VAListV));
|
|
}
|
|
|
|
|
|
std::pair<SDOperand,SDOperand>
|
|
X86TargetLowering::LowerVAArg(SDOperand Chain, SDOperand VAListP,
|
|
Value *VAListV, const Type *ArgTy,
|
|
SelectionDAG &DAG) {
|
|
MVT::ValueType ArgVT = getValueType(ArgTy);
|
|
SDOperand Val = DAG.getLoad(MVT::i32, Chain,
|
|
VAListP, DAG.getSrcValue(VAListV));
|
|
SDOperand Result = DAG.getLoad(ArgVT, Chain, Val,
|
|
DAG.getSrcValue(NULL));
|
|
unsigned Amt;
|
|
if (ArgVT == MVT::i32)
|
|
Amt = 4;
|
|
else {
|
|
assert((ArgVT == MVT::i64 || ArgVT == MVT::f64) &&
|
|
"Other types should have been promoted for varargs!");
|
|
Amt = 8;
|
|
}
|
|
Val = DAG.getNode(ISD::ADD, Val.getValueType(), Val,
|
|
DAG.getConstant(Amt, Val.getValueType()));
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Val, VAListP, DAG.getSrcValue(VAListV));
|
|
return std::make_pair(Result, Chain);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Fast Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The X86 'fast' calling convention passes up to two integer arguments in
|
|
// registers (an appropriate portion of EAX/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.
|
|
//
|
|
// Note that this can be enhanced in the future to pass fp vals in registers
|
|
// (when we have a global fp allocator) and do other tricks.
|
|
//
|
|
|
|
/// 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,
|
|
TargetRegisterClass *RC) {
|
|
assert(RC->contains(PReg) && "Not the correct regclass!");
|
|
unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
|
|
MF.addLiveIn(PReg, VReg);
|
|
return VReg;
|
|
}
|
|
|
|
|
|
std::vector<SDOperand>
|
|
X86TargetLowering::LowerFastCCArguments(Function &F, SelectionDAG &DAG) {
|
|
std::vector<SDOperand> ArgValues;
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
// Add DAG nodes to load the arguments... On entry to a function the stack
|
|
// frame looks like this:
|
|
//
|
|
// [ESP] -- return address
|
|
// [ESP + 4] -- first nonreg argument (leftmost lexically)
|
|
// [ESP + 8] -- second nonreg argument, if first argument is 4 bytes in size
|
|
// ...
|
|
unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
|
|
|
|
// Keep track of the number of integer regs passed so far. This can be either
|
|
// 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
|
|
// used).
|
|
unsigned NumIntRegs = 0;
|
|
|
|
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
|
|
MVT::ValueType ObjectVT = getValueType(I->getType());
|
|
unsigned ArgIncrement = 4;
|
|
unsigned ObjSize = 0;
|
|
SDOperand ArgValue;
|
|
|
|
switch (ObjectVT) {
|
|
default: assert(0 && "Unhandled argument type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
if (NumIntRegs < 2) {
|
|
if (!I->use_empty()) {
|
|
unsigned VReg = AddLiveIn(MF, NumIntRegs ? X86::DL : X86::AL,
|
|
X86::R8RegisterClass);
|
|
ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i8);
|
|
DAG.setRoot(ArgValue.getValue(1));
|
|
}
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
|
|
ObjSize = 1;
|
|
break;
|
|
case MVT::i16:
|
|
if (NumIntRegs < 2) {
|
|
if (!I->use_empty()) {
|
|
unsigned VReg = AddLiveIn(MF, NumIntRegs ? X86::DX : X86::AX,
|
|
X86::R16RegisterClass);
|
|
ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i16);
|
|
DAG.setRoot(ArgValue.getValue(1));
|
|
}
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
ObjSize = 2;
|
|
break;
|
|
case MVT::i32:
|
|
if (NumIntRegs < 2) {
|
|
if (!I->use_empty()) {
|
|
unsigned VReg = AddLiveIn(MF,NumIntRegs ? X86::EDX : X86::EAX,
|
|
X86::R32RegisterClass);
|
|
ArgValue = DAG.getCopyFromReg(DAG.getRoot(), VReg, MVT::i32);
|
|
DAG.setRoot(ArgValue.getValue(1));
|
|
}
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
ObjSize = 4;
|
|
break;
|
|
case MVT::i64:
|
|
if (NumIntRegs == 0) {
|
|
if (!I->use_empty()) {
|
|
unsigned BotReg = AddLiveIn(MF, X86::EAX, X86::R32RegisterClass);
|
|
unsigned TopReg = AddLiveIn(MF, X86::EDX, X86::R32RegisterClass);
|
|
|
|
SDOperand Low = DAG.getCopyFromReg(DAG.getRoot(), BotReg, MVT::i32);
|
|
SDOperand Hi = DAG.getCopyFromReg(Low.getValue(1), TopReg, MVT::i32);
|
|
DAG.setRoot(Hi.getValue(1));
|
|
|
|
ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Low, Hi);
|
|
}
|
|
NumIntRegs = 2;
|
|
break;
|
|
} else if (NumIntRegs == 1) {
|
|
if (!I->use_empty()) {
|
|
unsigned BotReg = AddLiveIn(MF, X86::EDX, X86::R32RegisterClass);
|
|
SDOperand Low = DAG.getCopyFromReg(DAG.getRoot(), BotReg, MVT::i32);
|
|
DAG.setRoot(Low.getValue(1));
|
|
|
|
// Load the high part from memory.
|
|
// Create the frame index object for this incoming parameter...
|
|
int FI = MFI->CreateFixedObject(4, ArgOffset);
|
|
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
SDOperand Hi = DAG.getLoad(MVT::i32, DAG.getEntryNode(), FIN,
|
|
DAG.getSrcValue(NULL));
|
|
ArgValue = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Low, Hi);
|
|
}
|
|
ArgOffset += 4;
|
|
NumIntRegs = 2;
|
|
break;
|
|
}
|
|
ObjSize = ArgIncrement = 8;
|
|
break;
|
|
case MVT::f32: ObjSize = 4; break;
|
|
case MVT::f64: ObjSize = ArgIncrement = 8; break;
|
|
}
|
|
|
|
// Don't codegen dead arguments. FIXME: remove this check when we can nuke
|
|
// dead loads.
|
|
if (ObjSize && !I->use_empty()) {
|
|
// Create the frame index object for this incoming parameter...
|
|
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
|
|
|
|
// Create the SelectionDAG nodes corresponding to a load from this
|
|
// parameter.
|
|
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
|
|
ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN,
|
|
DAG.getSrcValue(NULL));
|
|
} else if (ArgValue.Val == 0) {
|
|
if (MVT::isInteger(ObjectVT))
|
|
ArgValue = DAG.getConstant(0, ObjectVT);
|
|
else
|
|
ArgValue = DAG.getConstantFP(0, ObjectVT);
|
|
}
|
|
ArgValues.push_back(ArgValue);
|
|
|
|
if (ObjSize)
|
|
ArgOffset += ArgIncrement; // Move on to the next argument.
|
|
}
|
|
|
|
// 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 ((ArgOffset & 7) == 0)
|
|
ArgOffset += 4;
|
|
|
|
VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = ArgOffset; // Callee pops all stack arguments.
|
|
BytesCallerReserves = 0;
|
|
|
|
// Finally, inform the code generator which regs we return values in.
|
|
switch (getValueType(F.getReturnType())) {
|
|
default: assert(0 && "Unknown type!");
|
|
case MVT::isVoid: break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
MF.addLiveOut(X86::EAX);
|
|
break;
|
|
case MVT::i64:
|
|
MF.addLiveOut(X86::EAX);
|
|
MF.addLiveOut(X86::EDX);
|
|
break;
|
|
case MVT::f32:
|
|
case MVT::f64:
|
|
MF.addLiveOut(X86::ST0);
|
|
break;
|
|
}
|
|
return ArgValues;
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerFastCCCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isTailCall, SDOperand Callee,
|
|
ArgListTy &Args, SelectionDAG &DAG) {
|
|
// Count how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = 0;
|
|
|
|
// Keep track of the number of integer regs passed so far. This can be either
|
|
// 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
|
|
// used).
|
|
unsigned NumIntRegs = 0;
|
|
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i)
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unknown value type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
if (NumIntRegs < 2) {
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
// fall through
|
|
case MVT::f32:
|
|
NumBytes += 4;
|
|
break;
|
|
case MVT::i64:
|
|
if (NumIntRegs == 0) {
|
|
NumIntRegs = 2;
|
|
break;
|
|
} else if (NumIntRegs == 1) {
|
|
NumIntRegs = 2;
|
|
NumBytes += 4;
|
|
break;
|
|
}
|
|
|
|
// fall through
|
|
case MVT::f64:
|
|
NumBytes += 8;
|
|
break;
|
|
}
|
|
|
|
// 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.getNode(ISD::CALLSEQ_START, MVT::Other, Chain,
|
|
DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
// Arguments go on the stack in reverse order, as specified by the ABI.
|
|
unsigned ArgOffset = 0;
|
|
SDOperand StackPtr = DAG.getCopyFromReg(DAG.getEntryNode(),
|
|
X86::ESP, MVT::i32);
|
|
NumIntRegs = 0;
|
|
std::vector<SDOperand> Stores;
|
|
std::vector<SDOperand> RegValuesToPass;
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i) {
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unexpected ValueType for argument!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
if (NumIntRegs < 2) {
|
|
RegValuesToPass.push_back(Args[i].first);
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
// Fall through
|
|
case MVT::f32: {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
break;
|
|
}
|
|
case MVT::i64:
|
|
if (NumIntRegs < 2) { // Can pass part of it in regs?
|
|
SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
|
|
Args[i].first, DAG.getConstant(1, MVT::i32));
|
|
SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
|
|
Args[i].first, DAG.getConstant(0, MVT::i32));
|
|
RegValuesToPass.push_back(Lo);
|
|
++NumIntRegs;
|
|
if (NumIntRegs < 2) { // Pass both parts in regs?
|
|
RegValuesToPass.push_back(Hi);
|
|
++NumIntRegs;
|
|
} else {
|
|
// Pass the high part in memory.
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Hi, PtrOff, DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
}
|
|
break;
|
|
}
|
|
// Fall through
|
|
case MVT::f64:
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 8;
|
|
break;
|
|
}
|
|
}
|
|
if (!Stores.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
|
|
|
|
// 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 ((ArgOffset & 7) == 0)
|
|
ArgOffset += 4;
|
|
|
|
std::vector<MVT::ValueType> RetVals;
|
|
MVT::ValueType RetTyVT = getValueType(RetTy);
|
|
|
|
RetVals.push_back(MVT::Other);
|
|
|
|
// The result values produced have to be legal. Promote the result.
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
RetVals.push_back(RetTyVT);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
case MVT::f32:
|
|
if (X86ScalarSSE)
|
|
RetVals.push_back(MVT::f32);
|
|
else
|
|
RetVals.push_back(MVT::f64);
|
|
break;
|
|
case MVT::i64:
|
|
RetVals.push_back(MVT::i32);
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
}
|
|
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
|
|
// Callee pops all arg values on the stack.
|
|
Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
|
|
|
|
// Pass register arguments as needed.
|
|
Ops.insert(Ops.end(), RegValuesToPass.begin(), RegValuesToPass.end());
|
|
|
|
SDOperand TheCall = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
RetVals, Ops);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, TheCall);
|
|
|
|
SDOperand ResultVal;
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
ResultVal = TheCall.getValue(1);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
ResultVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, TheCall.getValue(1));
|
|
break;
|
|
case MVT::f32:
|
|
// FIXME: we would really like to remember that this FP_ROUND operation is
|
|
// okay to eliminate if we allow excess FP precision.
|
|
ResultVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, TheCall.getValue(1));
|
|
break;
|
|
case MVT::i64:
|
|
ResultVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, TheCall.getValue(1),
|
|
TheCall.getValue(2));
|
|
break;
|
|
}
|
|
|
|
return std::make_pair(ResultVal, Chain);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
|
|
if (ReturnAddrIndex == 0) {
|
|
// Set up a frame object for the return address.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(4, -4);
|
|
}
|
|
|
|
return DAG.getFrameIndex(ReturnAddrIndex, MVT::i32);
|
|
}
|
|
|
|
|
|
|
|
std::pair<SDOperand, SDOperand> X86TargetLowering::
|
|
LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
|
|
SelectionDAG &DAG) {
|
|
SDOperand Result;
|
|
if (Depth) // Depths > 0 not supported yet!
|
|
Result = DAG.getConstant(0, getPointerTy());
|
|
else {
|
|
SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
|
|
if (!isFrameAddress)
|
|
// Just load the return address
|
|
Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(), RetAddrFI,
|
|
DAG.getSrcValue(NULL));
|
|
else
|
|
Result = DAG.getNode(ISD::SUB, MVT::i32, RetAddrFI,
|
|
DAG.getConstant(4, MVT::i32));
|
|
}
|
|
return std::make_pair(Result, Chain);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86 Custom Lowering Hooks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// 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::SINT_TO_FP: {
|
|
assert(Op.getValueType() == MVT::f64 &&
|
|
Op.getOperand(0).getValueType() == MVT::i64 &&
|
|
"Unknown SINT_TO_FP to lower!");
|
|
// We lower sint64->FP into a store to a temporary stack slot, followed by a
|
|
// FILD64m node.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
|
|
Op.getOperand(0), StackSlot, DAG.getSrcValue(NULL));
|
|
std::vector<MVT::ValueType> RTs;
|
|
RTs.push_back(MVT::f64);
|
|
RTs.push_back(MVT::Other);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Store);
|
|
Ops.push_back(StackSlot);
|
|
return DAG.getNode(X86ISD::FILD64m, RTs, Ops);
|
|
}
|
|
case ISD::FP_TO_SINT: {
|
|
assert(Op.getValueType() <= MVT::i64 && Op.getValueType() >= MVT::i16 &&
|
|
Op.getOperand(0).getValueType() == MVT::f64 &&
|
|
"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;
|
|
}
|
|
|
|
// Build the FP_TO_INT*_IN_MEM
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(DAG.getEntryNode());
|
|
Ops.push_back(Op.getOperand(0));
|
|
Ops.push_back(StackSlot);
|
|
SDOperand FIST = DAG.getNode(Opc, MVT::Other, Ops);
|
|
|
|
// Load the result.
|
|
return DAG.getLoad(Op.getValueType(), FIST, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
case ISD::READCYCLECOUNTER: {
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Op.getOperand(0));
|
|
SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, Ops);
|
|
Ops.clear();
|
|
Ops.push_back(DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1)));
|
|
Ops.push_back(DAG.getCopyFromReg(Ops[0].getValue(1), X86::EDX,
|
|
MVT::i32, Ops[0].getValue(2)));
|
|
Ops.push_back(Ops[1].getValue(1));
|
|
Tys[0] = Tys[1] = MVT::i32;
|
|
Tys.push_back(MVT::Other);
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
|
|
}
|
|
case ISD::SETCC: {
|
|
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
|
|
SDOperand CC = Op.getOperand(2);
|
|
SDOperand Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Op.getOperand(0), Op.getOperand(1));
|
|
return DAG.getNode(X86ISD::SETCC, MVT::i8, CC, Cond);
|
|
}
|
|
case ISD::SELECT: {
|
|
SDOperand Cond = Op.getOperand(0);
|
|
SDOperand CC;
|
|
if (Cond.getOpcode() == X86ISD::SETCC) {
|
|
CC = Cond.getOperand(0);
|
|
Cond = Cond.getOperand(1);
|
|
} else if (Cond.getOpcode() == ISD::SETCC) {
|
|
CC = Cond.getOperand(2);
|
|
Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Cond.getOperand(0), Cond.getOperand(1));
|
|
} else {
|
|
CC = DAG.getCondCode(ISD::SETEQ);
|
|
Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Cond, Cond);
|
|
}
|
|
return DAG.getNode(X86ISD::CMOV, Op.getValueType(),
|
|
Op.getOperand(1), Op.getOperand(2), CC, Cond);
|
|
}
|
|
case ISD::BRCOND: {
|
|
SDOperand Cond = Op.getOperand(1);
|
|
SDOperand Dest = Op.getOperand(2);
|
|
SDOperand CC;
|
|
// TODO: handle Cond == OR / AND / XOR
|
|
if (Cond.getOpcode() == X86ISD::SETCC) {
|
|
CC = Cond.getOperand(0);
|
|
Cond = Cond.getOperand(1);
|
|
} else if (Cond.getOpcode() == ISD::SETCC) {
|
|
CC = Cond.getOperand(2);
|
|
Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Cond.getOperand(0), Cond.getOperand(1));
|
|
} else {
|
|
CC = DAG.getCondCode(ISD::SETNE);
|
|
Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Cond, Cond);
|
|
}
|
|
return DAG.getNode(X86ISD::BRCOND, Op.getValueType(),
|
|
Op.getOperand(0), Op.getOperand(2), CC, Cond);
|
|
}
|
|
case ISD::GlobalAddress:
|
|
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
|
|
SDOperand GVOp = DAG.getTargetGlobalAddress(GV, getPointerTy());
|
|
// For Darwin, 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.
|
|
if (getTargetMachine().
|
|
getSubtarget<X86Subtarget>().getIndirectExternAndWeakGlobals() &&
|
|
(GV->hasWeakLinkage() || GV->isExternal()))
|
|
return DAG.getLoad(MVT::i32, DAG.getEntryNode(),
|
|
GVOp, DAG.getSrcValue(NULL));
|
|
else
|
|
return GVOp;
|
|
break;
|
|
}
|
|
}
|
|
|
|
const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
switch (Opcode) {
|
|
default: return NULL;
|
|
case X86ISD::FILD64m: return "X86ISD::FILD64m";
|
|
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::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::TEST: return "X86ISD::TEST";
|
|
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";
|
|
}
|
|
}
|
|
|
|
bool X86TargetLowering::isMaskedValueZeroForTargetNode(const SDOperand &Op,
|
|
uint64_t Mask) const {
|
|
|
|
unsigned Opc = Op.getOpcode();
|
|
|
|
switch (Opc) {
|
|
default:
|
|
assert(Opc >= ISD::BUILTIN_OP_END && "Expected a target specific node");
|
|
break;
|
|
case X86ISD::SETCC: return (Mask & 1) == 0;
|
|
}
|
|
|
|
return false;
|
|
}
|