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aaffa05d0a
MERGE_VALUES node with only one operand, so get rid of special code that only existed to handle that possibility. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60349 91177308-0d34-0410-b5e6-96231b3b80d8
777 lines
30 KiB
C++
777 lines
30 KiB
C++
//===-- AlphaISelLowering.cpp - Alpha 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 is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the AlphaISelLowering class.
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//
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//===----------------------------------------------------------------------===//
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#include "AlphaISelLowering.h"
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#include "AlphaTargetMachine.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/MachineRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/Module.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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/// AddLiveIn - This helper function adds the specified physical register to the
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/// MachineFunction as a live in value. It also creates a corresponding virtual
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/// register for it.
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static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
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TargetRegisterClass *RC) {
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assert(RC->contains(PReg) && "Not the correct regclass!");
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unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
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MF.getRegInfo().addLiveIn(PReg, VReg);
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return VReg;
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}
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AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM) {
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// Set up the TargetLowering object.
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//I am having problems with shr n ubyte 1
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setShiftAmountType(MVT::i64);
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setBooleanContents(ZeroOrOneBooleanContent);
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setUsesGlobalOffsetTable(true);
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addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
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addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
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addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
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// We want to custom lower some of our intrinsics.
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setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
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setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
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setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
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setLoadExtAction(ISD::SEXTLOAD, MVT::i8, Expand);
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setLoadExtAction(ISD::SEXTLOAD, MVT::i16, Expand);
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// setOperationAction(ISD::BRIND, MVT::Other, Expand);
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setOperationAction(ISD::BR_JT, MVT::Other, Expand);
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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::SIGN_EXTEND_INREG, MVT::i1, Expand);
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setOperationAction(ISD::FREM, MVT::f32, Expand);
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setOperationAction(ISD::FREM, MVT::f64, Expand);
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setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
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setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
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setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
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setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
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if (!TM.getSubtarget<AlphaSubtarget>().hasCT()) {
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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::BSWAP , MVT::i64, Expand);
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setOperationAction(ISD::ROTL , MVT::i64, Expand);
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setOperationAction(ISD::ROTR , MVT::i64, Expand);
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setOperationAction(ISD::SREM , MVT::i64, Custom);
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setOperationAction(ISD::UREM , MVT::i64, Custom);
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setOperationAction(ISD::SDIV , MVT::i64, Custom);
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setOperationAction(ISD::UDIV , MVT::i64, Custom);
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setOperationAction(ISD::ADDC , MVT::i64, Expand);
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setOperationAction(ISD::ADDE , MVT::i64, Expand);
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setOperationAction(ISD::SUBC , MVT::i64, Expand);
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setOperationAction(ISD::SUBE , MVT::i64, Expand);
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setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
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setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
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// We don't support sin/cos/sqrt/pow
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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::FSIN , MVT::f32, Expand);
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setOperationAction(ISD::FCOS , MVT::f32, Expand);
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setOperationAction(ISD::FSQRT, MVT::f64, Expand);
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setOperationAction(ISD::FSQRT, MVT::f32, Expand);
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setOperationAction(ISD::FPOW , MVT::f32, Expand);
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setOperationAction(ISD::FPOW , MVT::f64, Expand);
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setOperationAction(ISD::SETCC, MVT::f32, Promote);
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setOperationAction(ISD::BIT_CONVERT, MVT::f32, Promote);
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// We don't have line number support yet.
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setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
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setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
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setOperationAction(ISD::DBG_LABEL, MVT::Other, Expand);
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setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
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// Not implemented yet.
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setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
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setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
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setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
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// We want to legalize GlobalAddress and ConstantPool and
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// ExternalSymbols nodes into the appropriate instructions to
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// materialize the address.
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setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
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setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
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setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
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setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
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setOperationAction(ISD::VASTART, MVT::Other, Custom);
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setOperationAction(ISD::VAEND, MVT::Other, Expand);
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setOperationAction(ISD::VACOPY, MVT::Other, Custom);
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setOperationAction(ISD::VAARG, MVT::Other, Custom);
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setOperationAction(ISD::VAARG, MVT::i32, Custom);
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setOperationAction(ISD::RET, MVT::Other, Custom);
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setOperationAction(ISD::JumpTable, MVT::i64, Custom);
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setOperationAction(ISD::JumpTable, MVT::i32, Custom);
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setStackPointerRegisterToSaveRestore(Alpha::R30);
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addLegalFPImmediate(APFloat(+0.0)); //F31
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addLegalFPImmediate(APFloat(+0.0f)); //F31
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addLegalFPImmediate(APFloat(-0.0)); //-F31
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addLegalFPImmediate(APFloat(-0.0f)); //-F31
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setJumpBufSize(272);
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setJumpBufAlignment(16);
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computeRegisterProperties();
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}
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MVT AlphaTargetLowering::getSetCCResultType(const SDValue &) const {
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return MVT::i64;
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}
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const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
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switch (Opcode) {
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default: return 0;
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case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
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case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
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case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
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case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
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case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
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case AlphaISD::RelLit: return "Alpha::RelLit";
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case AlphaISD::GlobalRetAddr: return "Alpha::GlobalRetAddr";
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case AlphaISD::CALL: return "Alpha::CALL";
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case AlphaISD::DivCall: return "Alpha::DivCall";
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case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
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case AlphaISD::COND_BRANCH_I: return "Alpha::COND_BRANCH_I";
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case AlphaISD::COND_BRANCH_F: return "Alpha::COND_BRANCH_F";
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}
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}
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static SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) {
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MVT PtrVT = Op.getValueType();
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JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
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SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
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SDValue Zero = DAG.getConstant(0, PtrVT);
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SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, JTI,
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DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
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SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, JTI, Hi);
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return Lo;
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}
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//http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
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//AA-PY8AC-TET1_html/callCH3.html#BLOCK21
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//For now, just use variable size stack frame format
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//In a standard call, the first six items are passed in registers $16
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//- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
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//of argument-to-register correspondence.) The remaining items are
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//collected in a memory argument list that is a naturally aligned
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//array of quadwords. In a standard call, this list, if present, must
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//be passed at 0(SP).
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//7 ... n 0(SP) ... (n-7)*8(SP)
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// //#define FP $15
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// //#define RA $26
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// //#define PV $27
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// //#define GP $29
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// //#define SP $30
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static SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG,
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int &VarArgsBase,
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int &VarArgsOffset) {
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MachineFunction &MF = DAG.getMachineFunction();
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MachineFrameInfo *MFI = MF.getFrameInfo();
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std::vector<SDValue> ArgValues;
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SDValue Root = Op.getOperand(0);
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AddLiveIn(MF, Alpha::R29, &Alpha::GPRCRegClass); //GP
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AddLiveIn(MF, Alpha::R26, &Alpha::GPRCRegClass); //RA
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unsigned args_int[] = {
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Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
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unsigned args_float[] = {
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Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
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for (unsigned ArgNo = 0, e = Op.getNode()->getNumValues()-1; ArgNo != e; ++ArgNo) {
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SDValue argt;
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MVT ObjectVT = Op.getValue(ArgNo).getValueType();
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SDValue ArgVal;
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if (ArgNo < 6) {
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switch (ObjectVT.getSimpleVT()) {
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default:
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assert(false && "Invalid value type!");
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case MVT::f64:
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args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
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&Alpha::F8RCRegClass);
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ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
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break;
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case MVT::f32:
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args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
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&Alpha::F4RCRegClass);
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ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
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break;
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case MVT::i64:
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args_int[ArgNo] = AddLiveIn(MF, args_int[ArgNo],
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&Alpha::GPRCRegClass);
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ArgVal = DAG.getCopyFromReg(Root, args_int[ArgNo], MVT::i64);
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break;
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}
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} else { //more args
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// Create the frame index object for this incoming parameter...
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int FI = MFI->CreateFixedObject(8, 8 * (ArgNo - 6));
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// Create the SelectionDAG nodes corresponding to a load
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//from this parameter
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SDValue FIN = DAG.getFrameIndex(FI, MVT::i64);
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ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
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}
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ArgValues.push_back(ArgVal);
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}
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// If the functions takes variable number of arguments, copy all regs to stack
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bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() != 0;
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if (isVarArg) {
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VarArgsOffset = (Op.getNode()->getNumValues()-1) * 8;
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std::vector<SDValue> LS;
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for (int i = 0; i < 6; ++i) {
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if (TargetRegisterInfo::isPhysicalRegister(args_int[i]))
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args_int[i] = AddLiveIn(MF, args_int[i], &Alpha::GPRCRegClass);
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SDValue argt = DAG.getCopyFromReg(Root, args_int[i], MVT::i64);
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int FI = MFI->CreateFixedObject(8, -8 * (6 - i));
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if (i == 0) VarArgsBase = FI;
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SDValue SDFI = DAG.getFrameIndex(FI, MVT::i64);
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LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
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if (TargetRegisterInfo::isPhysicalRegister(args_float[i]))
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args_float[i] = AddLiveIn(MF, args_float[i], &Alpha::F8RCRegClass);
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argt = DAG.getCopyFromReg(Root, args_float[i], MVT::f64);
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FI = MFI->CreateFixedObject(8, - 8 * (12 - i));
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SDFI = DAG.getFrameIndex(FI, MVT::i64);
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LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
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}
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//Set up a token factor with all the stack traffic
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Root = DAG.getNode(ISD::TokenFactor, MVT::Other, &LS[0], LS.size());
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}
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ArgValues.push_back(Root);
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// Return the new list of results.
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return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
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&ArgValues[0], ArgValues.size());
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}
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static SDValue LowerRET(SDValue Op, SelectionDAG &DAG) {
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SDValue Copy = DAG.getCopyToReg(Op.getOperand(0), Alpha::R26,
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DAG.getNode(AlphaISD::GlobalRetAddr,
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MVT::i64),
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SDValue());
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switch (Op.getNumOperands()) {
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default:
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assert(0 && "Do not know how to return this many arguments!");
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abort();
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case 1:
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break;
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//return SDValue(); // ret void is legal
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case 3: {
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MVT ArgVT = Op.getOperand(1).getValueType();
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unsigned ArgReg;
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if (ArgVT.isInteger())
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ArgReg = Alpha::R0;
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else {
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assert(ArgVT.isFloatingPoint());
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ArgReg = Alpha::F0;
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}
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Copy = DAG.getCopyToReg(Copy, ArgReg, Op.getOperand(1), Copy.getValue(1));
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if (DAG.getMachineFunction().getRegInfo().liveout_empty())
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DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg);
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break;
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}
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case 5: {
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MVT ArgVT = Op.getOperand(1).getValueType();
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unsigned ArgReg1, ArgReg2;
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if (ArgVT.isInteger()) {
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ArgReg1 = Alpha::R0;
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ArgReg2 = Alpha::R1;
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} else {
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assert(ArgVT.isFloatingPoint());
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ArgReg1 = Alpha::F0;
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ArgReg2 = Alpha::F1;
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}
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Copy = DAG.getCopyToReg(Copy, ArgReg1, Op.getOperand(1), Copy.getValue(1));
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if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
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DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg1)
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== DAG.getMachineFunction().getRegInfo().liveout_end())
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DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg1);
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Copy = DAG.getCopyToReg(Copy, ArgReg2, Op.getOperand(3), Copy.getValue(1));
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if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
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DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg2)
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== DAG.getMachineFunction().getRegInfo().liveout_end())
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DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg2);
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break;
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}
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}
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return DAG.getNode(AlphaISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
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}
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std::pair<SDValue, SDValue>
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AlphaTargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
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bool RetSExt, bool RetZExt, bool isVarArg,
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bool isInreg, unsigned CallingConv,
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bool isTailCall, SDValue Callee,
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ArgListTy &Args, SelectionDAG &DAG) {
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int NumBytes = 0;
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if (Args.size() > 6)
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NumBytes = (Args.size() - 6) * 8;
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Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
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std::vector<SDValue> args_to_use;
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for (unsigned i = 0, e = Args.size(); i != e; ++i)
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{
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switch (getValueType(Args[i].Ty).getSimpleVT()) {
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default: assert(0 && "Unexpected ValueType for argument!");
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case MVT::i1:
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case MVT::i8:
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case MVT::i16:
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case MVT::i32:
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// Promote the integer to 64 bits. If the input type is signed use a
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// sign extend, otherwise use a zero extend.
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if (Args[i].isSExt)
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Args[i].Node = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Args[i].Node);
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else if (Args[i].isZExt)
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Args[i].Node = DAG.getNode(ISD::ZERO_EXTEND, MVT::i64, Args[i].Node);
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else
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Args[i].Node = DAG.getNode(ISD::ANY_EXTEND, MVT::i64, Args[i].Node);
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break;
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case MVT::i64:
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case MVT::f64:
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case MVT::f32:
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break;
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}
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args_to_use.push_back(Args[i].Node);
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}
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std::vector<MVT> RetVals;
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MVT RetTyVT = getValueType(RetTy);
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MVT ActualRetTyVT = RetTyVT;
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if (RetTyVT.getSimpleVT() >= MVT::i1 && RetTyVT.getSimpleVT() <= MVT::i32)
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ActualRetTyVT = MVT::i64;
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if (RetTyVT != MVT::isVoid)
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RetVals.push_back(ActualRetTyVT);
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RetVals.push_back(MVT::Other);
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std::vector<SDValue> Ops;
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Ops.push_back(Chain);
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Ops.push_back(Callee);
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Ops.insert(Ops.end(), args_to_use.begin(), args_to_use.end());
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SDValue TheCall = DAG.getNode(AlphaISD::CALL, RetVals, &Ops[0], Ops.size());
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Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
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Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
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DAG.getIntPtrConstant(0, true), SDValue());
|
|
SDValue RetVal = TheCall;
|
|
|
|
if (RetTyVT != ActualRetTyVT) {
|
|
ISD::NodeType AssertKind = ISD::DELETED_NODE;
|
|
if (RetSExt)
|
|
AssertKind = ISD::AssertSext;
|
|
else if (RetZExt)
|
|
AssertKind = ISD::AssertZext;
|
|
|
|
if (AssertKind != ISD::DELETED_NODE)
|
|
RetVal = DAG.getNode(AssertKind, MVT::i64, RetVal,
|
|
DAG.getValueType(RetTyVT));
|
|
|
|
RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
|
|
}
|
|
|
|
return std::make_pair(RetVal, Chain);
|
|
}
|
|
|
|
void AlphaTargetLowering::LowerVAARG(SDNode *N, SDValue &Chain,
|
|
SDValue &DataPtr, SelectionDAG &DAG) {
|
|
Chain = N->getOperand(0);
|
|
SDValue VAListP = N->getOperand(1);
|
|
const Value *VAListS = cast<SrcValueSDNode>(N->getOperand(2))->getValue();
|
|
|
|
SDValue Base = DAG.getLoad(MVT::i64, Chain, VAListP, VAListS, 0);
|
|
SDValue Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
|
|
DAG.getConstant(8, MVT::i64));
|
|
SDValue Offset = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Base.getValue(1),
|
|
Tmp, NULL, 0, MVT::i32);
|
|
DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
|
|
if (N->getValueType(0).isFloatingPoint())
|
|
{
|
|
//if fp && Offset < 6*8, then subtract 6*8 from DataPtr
|
|
SDValue FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
|
|
DAG.getConstant(8*6, MVT::i64));
|
|
SDValue CC = DAG.getSetCC(MVT::i64, Offset,
|
|
DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
|
|
DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
|
|
}
|
|
|
|
SDValue NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
|
|
DAG.getConstant(8, MVT::i64));
|
|
Chain = DAG.getTruncStore(Offset.getValue(1), NewOffset, Tmp, NULL, 0,
|
|
MVT::i32);
|
|
}
|
|
|
|
/// LowerOperation - Provide custom lowering hooks for some operations.
|
|
///
|
|
SDValue AlphaTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
|
|
switch (Op.getOpcode()) {
|
|
default: assert(0 && "Wasn't expecting to be able to lower this!");
|
|
case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG,
|
|
VarArgsBase,
|
|
VarArgsOffset);
|
|
|
|
case ISD::RET: return LowerRET(Op,DAG);
|
|
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
|
|
|
|
case ISD::INTRINSIC_WO_CHAIN: {
|
|
unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
switch (IntNo) {
|
|
default: break; // Don't custom lower most intrinsics.
|
|
case Intrinsic::alpha_umulh:
|
|
return DAG.getNode(ISD::MULHU, MVT::i64, Op.getOperand(1), Op.getOperand(2));
|
|
}
|
|
}
|
|
|
|
case ISD::SINT_TO_FP: {
|
|
assert(Op.getOperand(0).getValueType() == MVT::i64 &&
|
|
"Unhandled SINT_TO_FP type in custom expander!");
|
|
SDValue LD;
|
|
bool isDouble = Op.getValueType() == MVT::f64;
|
|
LD = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, Op.getOperand(0));
|
|
SDValue FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_,
|
|
isDouble?MVT::f64:MVT::f32, LD);
|
|
return FP;
|
|
}
|
|
case ISD::FP_TO_SINT: {
|
|
bool isDouble = Op.getOperand(0).getValueType() == MVT::f64;
|
|
SDValue src = Op.getOperand(0);
|
|
|
|
if (!isDouble) //Promote
|
|
src = DAG.getNode(ISD::FP_EXTEND, MVT::f64, src);
|
|
|
|
src = DAG.getNode(AlphaISD::CVTTQ_, MVT::f64, src);
|
|
|
|
return DAG.getNode(ISD::BIT_CONVERT, MVT::i64, src);
|
|
}
|
|
case ISD::ConstantPool: {
|
|
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
|
|
Constant *C = CP->getConstVal();
|
|
SDValue CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
|
|
|
|
SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, CPI,
|
|
DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
|
|
SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, CPI, Hi);
|
|
return Lo;
|
|
}
|
|
case ISD::GlobalTLSAddress:
|
|
assert(0 && "TLS not implemented for Alpha.");
|
|
case ISD::GlobalAddress: {
|
|
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
|
|
GlobalValue *GV = GSDN->getGlobal();
|
|
SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
|
|
|
|
// if (!GV->hasWeakLinkage() && !GV->isDeclaration() && !GV->hasLinkOnceLinkage()) {
|
|
if (GV->hasInternalLinkage()) {
|
|
SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, GA,
|
|
DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
|
|
SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, GA, Hi);
|
|
return Lo;
|
|
} else
|
|
return DAG.getNode(AlphaISD::RelLit, MVT::i64, GA,
|
|
DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
|
|
}
|
|
case ISD::ExternalSymbol: {
|
|
return DAG.getNode(AlphaISD::RelLit, MVT::i64,
|
|
DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)
|
|
->getSymbol(), MVT::i64),
|
|
DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
|
|
}
|
|
|
|
case ISD::UREM:
|
|
case ISD::SREM:
|
|
//Expand only on constant case
|
|
if (Op.getOperand(1).getOpcode() == ISD::Constant) {
|
|
MVT VT = Op.getNode()->getValueType(0);
|
|
SDValue Tmp1 = Op.getNode()->getOpcode() == ISD::UREM ?
|
|
BuildUDIV(Op.getNode(), DAG, NULL) :
|
|
BuildSDIV(Op.getNode(), DAG, NULL);
|
|
Tmp1 = DAG.getNode(ISD::MUL, VT, Tmp1, Op.getOperand(1));
|
|
Tmp1 = DAG.getNode(ISD::SUB, VT, Op.getOperand(0), Tmp1);
|
|
return Tmp1;
|
|
}
|
|
//fall through
|
|
case ISD::SDIV:
|
|
case ISD::UDIV:
|
|
if (Op.getValueType().isInteger()) {
|
|
if (Op.getOperand(1).getOpcode() == ISD::Constant)
|
|
return Op.getOpcode() == ISD::SDIV ? BuildSDIV(Op.getNode(), DAG, NULL)
|
|
: BuildUDIV(Op.getNode(), DAG, NULL);
|
|
const char* opstr = 0;
|
|
switch (Op.getOpcode()) {
|
|
case ISD::UREM: opstr = "__remqu"; break;
|
|
case ISD::SREM: opstr = "__remq"; break;
|
|
case ISD::UDIV: opstr = "__divqu"; break;
|
|
case ISD::SDIV: opstr = "__divq"; break;
|
|
}
|
|
SDValue Tmp1 = Op.getOperand(0),
|
|
Tmp2 = Op.getOperand(1),
|
|
Addr = DAG.getExternalSymbol(opstr, MVT::i64);
|
|
return DAG.getNode(AlphaISD::DivCall, MVT::i64, Addr, Tmp1, Tmp2);
|
|
}
|
|
break;
|
|
|
|
case ISD::VAARG: {
|
|
SDValue Chain, DataPtr;
|
|
LowerVAARG(Op.getNode(), Chain, DataPtr, DAG);
|
|
|
|
SDValue Result;
|
|
if (Op.getValueType() == MVT::i32)
|
|
Result = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Chain, DataPtr,
|
|
NULL, 0, MVT::i32);
|
|
else
|
|
Result = DAG.getLoad(Op.getValueType(), Chain, DataPtr, NULL, 0);
|
|
return Result;
|
|
}
|
|
case ISD::VACOPY: {
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue DestP = Op.getOperand(1);
|
|
SDValue SrcP = Op.getOperand(2);
|
|
const Value *DestS = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
|
|
const Value *SrcS = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
|
|
|
|
SDValue Val = DAG.getLoad(getPointerTy(), Chain, SrcP, SrcS, 0);
|
|
SDValue Result = DAG.getStore(Val.getValue(1), Val, DestP, DestS, 0);
|
|
SDValue NP = DAG.getNode(ISD::ADD, MVT::i64, SrcP,
|
|
DAG.getConstant(8, MVT::i64));
|
|
Val = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Result, NP, NULL,0, MVT::i32);
|
|
SDValue NPD = DAG.getNode(ISD::ADD, MVT::i64, DestP,
|
|
DAG.getConstant(8, MVT::i64));
|
|
return DAG.getTruncStore(Val.getValue(1), Val, NPD, NULL, 0, MVT::i32);
|
|
}
|
|
case ISD::VASTART: {
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue VAListP = Op.getOperand(1);
|
|
const Value *VAListS = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
|
|
|
|
// vastart stores the address of the VarArgsBase and VarArgsOffset
|
|
SDValue FR = DAG.getFrameIndex(VarArgsBase, MVT::i64);
|
|
SDValue S1 = DAG.getStore(Chain, FR, VAListP, VAListS, 0);
|
|
SDValue SA2 = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
|
|
DAG.getConstant(8, MVT::i64));
|
|
return DAG.getTruncStore(S1, DAG.getConstant(VarArgsOffset, MVT::i64),
|
|
SA2, NULL, 0, MVT::i32);
|
|
}
|
|
case ISD::RETURNADDR:
|
|
return DAG.getNode(AlphaISD::GlobalRetAddr, MVT::i64);
|
|
//FIXME: implement
|
|
case ISD::FRAMEADDR: break;
|
|
}
|
|
|
|
return SDValue();
|
|
}
|
|
|
|
void AlphaTargetLowering::ReplaceNodeResults(SDNode *N,
|
|
SmallVectorImpl<SDValue>&Results,
|
|
SelectionDAG &DAG) {
|
|
assert(N->getValueType(0) == MVT::i32 &&
|
|
N->getOpcode() == ISD::VAARG &&
|
|
"Unknown node to custom promote!");
|
|
|
|
SDValue Chain, DataPtr;
|
|
LowerVAARG(N, Chain, DataPtr, DAG);
|
|
SDValue Res = DAG.getLoad(N->getValueType(0), Chain, DataPtr, NULL, 0);
|
|
Results.push_back(Res);
|
|
Results.push_back(SDValue(Res.getNode(), 1));
|
|
}
|
|
|
|
|
|
//Inline Asm
|
|
|
|
/// getConstraintType - Given a constraint letter, return the type of
|
|
/// constraint it is for this target.
|
|
AlphaTargetLowering::ConstraintType
|
|
AlphaTargetLowering::getConstraintType(const std::string &Constraint) const {
|
|
if (Constraint.size() == 1) {
|
|
switch (Constraint[0]) {
|
|
default: break;
|
|
case 'f':
|
|
case 'r':
|
|
return C_RegisterClass;
|
|
}
|
|
}
|
|
return TargetLowering::getConstraintType(Constraint);
|
|
}
|
|
|
|
std::vector<unsigned> AlphaTargetLowering::
|
|
getRegClassForInlineAsmConstraint(const std::string &Constraint,
|
|
MVT VT) const {
|
|
if (Constraint.size() == 1) {
|
|
switch (Constraint[0]) {
|
|
default: break; // Unknown constriant letter
|
|
case 'f':
|
|
return make_vector<unsigned>(Alpha::F0 , Alpha::F1 , Alpha::F2 ,
|
|
Alpha::F3 , Alpha::F4 , Alpha::F5 ,
|
|
Alpha::F6 , Alpha::F7 , Alpha::F8 ,
|
|
Alpha::F9 , Alpha::F10, Alpha::F11,
|
|
Alpha::F12, Alpha::F13, Alpha::F14,
|
|
Alpha::F15, Alpha::F16, Alpha::F17,
|
|
Alpha::F18, Alpha::F19, Alpha::F20,
|
|
Alpha::F21, Alpha::F22, Alpha::F23,
|
|
Alpha::F24, Alpha::F25, Alpha::F26,
|
|
Alpha::F27, Alpha::F28, Alpha::F29,
|
|
Alpha::F30, Alpha::F31, 0);
|
|
case 'r':
|
|
return make_vector<unsigned>(Alpha::R0 , Alpha::R1 , Alpha::R2 ,
|
|
Alpha::R3 , Alpha::R4 , Alpha::R5 ,
|
|
Alpha::R6 , Alpha::R7 , Alpha::R8 ,
|
|
Alpha::R9 , Alpha::R10, Alpha::R11,
|
|
Alpha::R12, Alpha::R13, Alpha::R14,
|
|
Alpha::R15, Alpha::R16, Alpha::R17,
|
|
Alpha::R18, Alpha::R19, Alpha::R20,
|
|
Alpha::R21, Alpha::R22, Alpha::R23,
|
|
Alpha::R24, Alpha::R25, Alpha::R26,
|
|
Alpha::R27, Alpha::R28, Alpha::R29,
|
|
Alpha::R30, Alpha::R31, 0);
|
|
}
|
|
}
|
|
|
|
return std::vector<unsigned>();
|
|
}
|
|
//===----------------------------------------------------------------------===//
|
|
// Other Lowering Code
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
MachineBasicBlock *
|
|
AlphaTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
|
|
MachineBasicBlock *BB) {
|
|
const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
|
|
assert((MI->getOpcode() == Alpha::CAS32 ||
|
|
MI->getOpcode() == Alpha::CAS64 ||
|
|
MI->getOpcode() == Alpha::LAS32 ||
|
|
MI->getOpcode() == Alpha::LAS64 ||
|
|
MI->getOpcode() == Alpha::SWAP32 ||
|
|
MI->getOpcode() == Alpha::SWAP64) &&
|
|
"Unexpected instr type to insert");
|
|
|
|
bool is32 = MI->getOpcode() == Alpha::CAS32 ||
|
|
MI->getOpcode() == Alpha::LAS32 ||
|
|
MI->getOpcode() == Alpha::SWAP32;
|
|
|
|
//Load locked store conditional for atomic ops take on the same form
|
|
//start:
|
|
//ll
|
|
//do stuff (maybe branch to exit)
|
|
//sc
|
|
//test sc and maybe branck to start
|
|
//exit:
|
|
const BasicBlock *LLVM_BB = BB->getBasicBlock();
|
|
MachineFunction::iterator It = BB;
|
|
++It;
|
|
|
|
MachineBasicBlock *thisMBB = BB;
|
|
MachineFunction *F = BB->getParent();
|
|
MachineBasicBlock *llscMBB = F->CreateMachineBasicBlock(LLVM_BB);
|
|
MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
|
|
|
|
sinkMBB->transferSuccessors(thisMBB);
|
|
|
|
F->insert(It, llscMBB);
|
|
F->insert(It, sinkMBB);
|
|
|
|
BuildMI(thisMBB, TII->get(Alpha::BR)).addMBB(llscMBB);
|
|
|
|
unsigned reg_res = MI->getOperand(0).getReg(),
|
|
reg_ptr = MI->getOperand(1).getReg(),
|
|
reg_v2 = MI->getOperand(2).getReg(),
|
|
reg_store = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
|
|
|
|
BuildMI(llscMBB, TII->get(is32 ? Alpha::LDL_L : Alpha::LDQ_L),
|
|
reg_res).addImm(0).addReg(reg_ptr);
|
|
switch (MI->getOpcode()) {
|
|
case Alpha::CAS32:
|
|
case Alpha::CAS64: {
|
|
unsigned reg_cmp
|
|
= F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
|
|
BuildMI(llscMBB, TII->get(Alpha::CMPEQ), reg_cmp)
|
|
.addReg(reg_v2).addReg(reg_res);
|
|
BuildMI(llscMBB, TII->get(Alpha::BEQ))
|
|
.addImm(0).addReg(reg_cmp).addMBB(sinkMBB);
|
|
BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
|
|
.addReg(Alpha::R31).addReg(MI->getOperand(3).getReg());
|
|
break;
|
|
}
|
|
case Alpha::LAS32:
|
|
case Alpha::LAS64: {
|
|
BuildMI(llscMBB, TII->get(is32 ? Alpha::ADDLr : Alpha::ADDQr), reg_store)
|
|
.addReg(reg_res).addReg(reg_v2);
|
|
break;
|
|
}
|
|
case Alpha::SWAP32:
|
|
case Alpha::SWAP64: {
|
|
BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
|
|
.addReg(reg_v2).addReg(reg_v2);
|
|
break;
|
|
}
|
|
}
|
|
BuildMI(llscMBB, TII->get(is32 ? Alpha::STL_C : Alpha::STQ_C), reg_store)
|
|
.addReg(reg_store).addImm(0).addReg(reg_ptr);
|
|
BuildMI(llscMBB, TII->get(Alpha::BEQ))
|
|
.addImm(0).addReg(reg_store).addMBB(llscMBB);
|
|
BuildMI(llscMBB, TII->get(Alpha::BR)).addMBB(sinkMBB);
|
|
|
|
thisMBB->addSuccessor(llscMBB);
|
|
llscMBB->addSuccessor(llscMBB);
|
|
llscMBB->addSuccessor(sinkMBB);
|
|
F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
|
|
|
|
return sinkMBB;
|
|
}
|
|
|
|
bool
|
|
AlphaTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
|
|
// The Alpha target isn't yet aware of offsets.
|
|
return false;
|
|
}
|