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Diffstat (limited to 'contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp b/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp new file mode 100644 index 0000000..8e49eca --- /dev/null +++ b/contrib/llvm/lib/Target/Sparc/SparcInstrInfo.cpp @@ -0,0 +1,261 @@ +//===- SparcInstrInfo.cpp - Sparc Instruction Information -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the Sparc implementation of the TargetInstrInfo class. +// +//===----------------------------------------------------------------------===// + +#include "SparcInstrInfo.h" +#include "SparcSubtarget.h" +#include "Sparc.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/ADT/SmallVector.h" +#include "llvm/CodeGen/MachineInstrBuilder.h" +#include "llvm/CodeGen/MachineRegisterInfo.h" +#include "llvm/Support/ErrorHandling.h" +#include "SparcGenInstrInfo.inc" +#include "SparcMachineFunctionInfo.h" +using namespace llvm; + +SparcInstrInfo::SparcInstrInfo(SparcSubtarget &ST) + : TargetInstrInfoImpl(SparcInsts, array_lengthof(SparcInsts)), + RI(ST, *this), Subtarget(ST) { +} + +static bool isZeroImm(const MachineOperand &op) { + return op.isImm() && op.getImm() == 0; +} + +/// Return true if the instruction is a register to register move and +/// leave the source and dest operands in the passed parameters. +/// +bool SparcInstrInfo::isMoveInstr(const MachineInstr &MI, + unsigned &SrcReg, unsigned &DstReg, + unsigned &SrcSR, unsigned &DstSR) const { + SrcSR = DstSR = 0; // No sub-registers. + + // We look for 3 kinds of patterns here: + // or with G0 or 0 + // add with G0 or 0 + // fmovs or FpMOVD (pseudo double move). + if (MI.getOpcode() == SP::ORrr || MI.getOpcode() == SP::ADDrr) { + if (MI.getOperand(1).getReg() == SP::G0) { + DstReg = MI.getOperand(0).getReg(); + SrcReg = MI.getOperand(2).getReg(); + return true; + } else if (MI.getOperand(2).getReg() == SP::G0) { + DstReg = MI.getOperand(0).getReg(); + SrcReg = MI.getOperand(1).getReg(); + return true; + } + } else if ((MI.getOpcode() == SP::ORri || MI.getOpcode() == SP::ADDri) && + isZeroImm(MI.getOperand(2)) && MI.getOperand(1).isReg()) { + DstReg = MI.getOperand(0).getReg(); + SrcReg = MI.getOperand(1).getReg(); + return true; + } else if (MI.getOpcode() == SP::FMOVS || MI.getOpcode() == SP::FpMOVD || + MI.getOpcode() == SP::FMOVD) { + SrcReg = MI.getOperand(1).getReg(); + DstReg = MI.getOperand(0).getReg(); + return true; + } + return false; +} + +/// isLoadFromStackSlot - If the specified machine instruction is a direct +/// load from a stack slot, return the virtual or physical register number of +/// the destination along with the FrameIndex of the loaded stack slot. If +/// not, return 0. This predicate must return 0 if the instruction has +/// any side effects other than loading from the stack slot. +unsigned SparcInstrInfo::isLoadFromStackSlot(const MachineInstr *MI, + int &FrameIndex) const { + if (MI->getOpcode() == SP::LDri || + MI->getOpcode() == SP::LDFri || + MI->getOpcode() == SP::LDDFri) { + if (MI->getOperand(1).isFI() && MI->getOperand(2).isImm() && + MI->getOperand(2).getImm() == 0) { + FrameIndex = MI->getOperand(1).getIndex(); + return MI->getOperand(0).getReg(); + } + } + return 0; +} + +/// isStoreToStackSlot - If the specified machine instruction is a direct +/// store to a stack slot, return the virtual or physical register number of +/// the source reg along with the FrameIndex of the loaded stack slot. If +/// not, return 0. This predicate must return 0 if the instruction has +/// any side effects other than storing to the stack slot. +unsigned SparcInstrInfo::isStoreToStackSlot(const MachineInstr *MI, + int &FrameIndex) const { + if (MI->getOpcode() == SP::STri || + MI->getOpcode() == SP::STFri || + MI->getOpcode() == SP::STDFri) { + if (MI->getOperand(0).isFI() && MI->getOperand(1).isImm() && + MI->getOperand(1).getImm() == 0) { + FrameIndex = MI->getOperand(0).getIndex(); + return MI->getOperand(2).getReg(); + } + } + return 0; +} + +unsigned +SparcInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB, + MachineBasicBlock *FBB, + const SmallVectorImpl<MachineOperand> &Cond)const{ + // FIXME this should probably take a DebugLoc argument + DebugLoc dl; + // Can only insert uncond branches so far. + assert(Cond.empty() && !FBB && TBB && "Can only handle uncond branches!"); + BuildMI(&MBB, dl, get(SP::BA)).addMBB(TBB); + return 1; +} + +bool SparcInstrInfo::copyRegToReg(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, + unsigned DestReg, unsigned SrcReg, + const TargetRegisterClass *DestRC, + const TargetRegisterClass *SrcRC, + DebugLoc DL) const { + if (DestRC != SrcRC) { + // Not yet supported! + return false; + } + + if (DestRC == SP::IntRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::ORrr), DestReg).addReg(SP::G0).addReg(SrcReg); + else if (DestRC == SP::FPRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::FMOVS), DestReg).addReg(SrcReg); + else if (DestRC == SP::DFPRegsRegisterClass) + BuildMI(MBB, I, DL, get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg) + .addReg(SrcReg); + else + // Can't copy this register + return false; + + return true; +} + +void SparcInstrInfo:: +storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, + unsigned SrcReg, bool isKill, int FI, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const { + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + + // On the order of operands here: think "[FrameIdx + 0] = SrcReg". + if (RC == SP::IntRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::STri)).addFrameIndex(FI).addImm(0) + .addReg(SrcReg, getKillRegState(isKill)); + else if (RC == SP::FPRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::STFri)).addFrameIndex(FI).addImm(0) + .addReg(SrcReg, getKillRegState(isKill)); + else if (RC == SP::DFPRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::STDFri)).addFrameIndex(FI).addImm(0) + .addReg(SrcReg, getKillRegState(isKill)); + else + llvm_unreachable("Can't store this register to stack slot"); +} + +void SparcInstrInfo:: +loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, + unsigned DestReg, int FI, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const { + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + + if (RC == SP::IntRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::LDri), DestReg).addFrameIndex(FI).addImm(0); + else if (RC == SP::FPRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::LDFri), DestReg).addFrameIndex(FI).addImm(0); + else if (RC == SP::DFPRegsRegisterClass) + BuildMI(MBB, I, DL, get(SP::LDDFri), DestReg).addFrameIndex(FI).addImm(0); + else + llvm_unreachable("Can't load this register from stack slot"); +} + +MachineInstr *SparcInstrInfo::foldMemoryOperandImpl(MachineFunction &MF, + MachineInstr* MI, + const SmallVectorImpl<unsigned> &Ops, + int FI) const { + if (Ops.size() != 1) return NULL; + + unsigned OpNum = Ops[0]; + bool isFloat = false; + MachineInstr *NewMI = NULL; + switch (MI->getOpcode()) { + case SP::ORrr: + if (MI->getOperand(1).isReg() && MI->getOperand(1).getReg() == SP::G0&& + MI->getOperand(0).isReg() && MI->getOperand(2).isReg()) { + if (OpNum == 0) // COPY -> STORE + NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::STri)) + .addFrameIndex(FI) + .addImm(0) + .addReg(MI->getOperand(2).getReg()); + else // COPY -> LOAD + NewMI = BuildMI(MF, MI->getDebugLoc(), get(SP::LDri), + MI->getOperand(0).getReg()) + .addFrameIndex(FI) + .addImm(0); + } + break; + case SP::FMOVS: + isFloat = true; + // FALLTHROUGH + case SP::FMOVD: + if (OpNum == 0) { // COPY -> STORE + unsigned SrcReg = MI->getOperand(1).getReg(); + bool isKill = MI->getOperand(1).isKill(); + bool isUndef = MI->getOperand(1).isUndef(); + NewMI = BuildMI(MF, MI->getDebugLoc(), + get(isFloat ? SP::STFri : SP::STDFri)) + .addFrameIndex(FI) + .addImm(0) + .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef)); + } else { // COPY -> LOAD + unsigned DstReg = MI->getOperand(0).getReg(); + bool isDead = MI->getOperand(0).isDead(); + bool isUndef = MI->getOperand(0).isUndef(); + NewMI = BuildMI(MF, MI->getDebugLoc(), + get(isFloat ? SP::LDFri : SP::LDDFri)) + .addReg(DstReg, RegState::Define | + getDeadRegState(isDead) | getUndefRegState(isUndef)) + .addFrameIndex(FI) + .addImm(0); + } + break; + } + + return NewMI; +} + +unsigned SparcInstrInfo::getGlobalBaseReg(MachineFunction *MF) const +{ + SparcMachineFunctionInfo *SparcFI = MF->getInfo<SparcMachineFunctionInfo>(); + unsigned GlobalBaseReg = SparcFI->getGlobalBaseReg(); + if (GlobalBaseReg != 0) + return GlobalBaseReg; + + // Insert the set of GlobalBaseReg into the first MBB of the function + MachineBasicBlock &FirstMBB = MF->front(); + MachineBasicBlock::iterator MBBI = FirstMBB.begin(); + MachineRegisterInfo &RegInfo = MF->getRegInfo(); + + GlobalBaseReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass); + + + DebugLoc dl; + + BuildMI(FirstMBB, MBBI, dl, get(SP::GETPCX), GlobalBaseReg); + SparcFI->setGlobalBaseReg(GlobalBaseReg); + return GlobalBaseReg; +} |