-//===- Thumb1InstrInfo.cpp - Thumb-1 Instruction Information --------*- C++ -*-===//
+//===- Thumb1InstrInfo.cpp - Thumb-1 Instruction Information ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
-#include "ARMInstrInfo.h"
+#include "Thumb1InstrInfo.h"
#include "ARM.h"
-#include "ARMGenInstrInfo.inc"
#include "ARMMachineFunctionInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/ADT/SmallVector.h"
#include "Thumb1InstrInfo.h"
using namespace llvm;
-Thumb1InstrInfo::Thumb1InstrInfo(const ARMSubtarget &STI) : RI(*this, STI) {
+Thumb1InstrInfo::Thumb1InstrInfo(const ARMSubtarget &STI)
+ : ARMBaseInstrInfo(STI), RI(*this, STI) {
}
unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const {
return 0;
}
-bool
-Thumb1InstrInfo::BlockHasNoFallThrough(const MachineBasicBlock &MBB) const {
- if (MBB.empty()) return false;
-
- switch (MBB.back().getOpcode()) {
- case ARM::tBX_RET:
- case ARM::tBX_RET_vararg:
- case ARM::tPOP_RET:
- case ARM::tB:
- case ARM::tBRIND:
- case ARM::tBR_JTr:
- return true;
- default:
- break;
- }
-
- return false;
-}
-
-bool Thumb1InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *DestRC,
- const TargetRegisterClass *SrcRC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
- if (DestRC == ARM::GPRRegisterClass) {
- if (SrcRC == ARM::GPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg);
- return true;
- } else if (SrcRC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVtgpr2gpr), DestReg).addReg(SrcReg);
- return true;
- }
- } else if (DestRC == ARM::tGPRRegisterClass) {
- if (SrcRC == ARM::GPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVgpr2tgpr), DestReg).addReg(SrcReg);
- return true;
- } else if (SrcRC == ARM::tGPRRegisterClass) {
- BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg).addReg(SrcReg);
- return true;
- }
- }
-
- return false;
-}
-
-bool Thumb1InstrInfo::
-canFoldMemoryOperand(const MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops) const {
- if (Ops.size() != 1) return false;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVtgpr2gpr:
- case ARM::tMOVgpr2tgpr:
- case ARM::tMOVgpr2gpr: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
- !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- return false;
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
- !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- return false;
- }
- return true;
- }
- }
-
- return false;
+void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I, DebugLoc DL,
+ unsigned DestReg, unsigned SrcReg,
+ bool KillSrc) const {
+ AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg)
+ .addReg(SrcReg, getKillRegState(KillSrc)));
+ assert(ARM::GPRRegClass.contains(DestReg, SrcReg) &&
+ "Thumb1 can only copy GPR registers");
}
void Thumb1InstrInfo::
storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned SrcReg, bool isKill, int FI,
- const TargetRegisterClass *RC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const {
assert((RC == ARM::tGPRRegisterClass ||
(TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
isARMLowRegister(SrcReg))) && "Unknown regclass!");
- if (RC == ARM::tGPRRegisterClass) {
- AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSpill))
+ if (RC == ARM::tGPRRegisterClass ||
+ (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
+ isARMLowRegister(SrcReg))) {
+ DebugLoc DL;
+ if (I != MBB.end()) DL = I->getDebugLoc();
+
+ MachineFunction &MF = *MBB.getParent();
+ MachineFrameInfo &MFI = *MF.getFrameInfo();
+ MachineMemOperand *MMO =
+ MF.getMachineMemOperand(
+ MachinePointerInfo(PseudoSourceValue::getFixedStack(FI)),
+ MachineMemOperand::MOStore,
+ MFI.getObjectSize(FI),
+ MFI.getObjectAlignment(FI));
+ AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSTRspi))
.addReg(SrcReg, getKillRegState(isKill))
- .addFrameIndex(FI).addImm(0));
+ .addFrameIndex(FI).addImm(0).addMemOperand(MMO));
}
}
void Thumb1InstrInfo::
loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned DestReg, int FI,
- const TargetRegisterClass *RC) const {
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (I != MBB.end()) DL = I->getDebugLoc();
-
+ const TargetRegisterClass *RC,
+ const TargetRegisterInfo *TRI) const {
assert((RC == ARM::tGPRRegisterClass ||
(TargetRegisterInfo::isPhysicalRegister(DestReg) &&
isARMLowRegister(DestReg))) && "Unknown regclass!");
- if (RC == ARM::tGPRRegisterClass) {
- AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tRestore), DestReg)
- .addFrameIndex(FI).addImm(0));
+ if (RC == ARM::tGPRRegisterClass ||
+ (TargetRegisterInfo::isPhysicalRegister(DestReg) &&
+ isARMLowRegister(DestReg))) {
+ DebugLoc DL;
+ if (I != MBB.end()) DL = I->getDebugLoc();
+
+ MachineFunction &MF = *MBB.getParent();
+ MachineFrameInfo &MFI = *MF.getFrameInfo();
+ MachineMemOperand *MMO =
+ MF.getMachineMemOperand(
+ MachinePointerInfo(PseudoSourceValue::getFixedStack(FI)),
+ MachineMemOperand::MOLoad,
+ MFI.getObjectSize(FI),
+ MFI.getObjectAlignment(FI));
+ AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tLDRspi), DestReg)
+ .addFrameIndex(FI).addImm(0).addMemOperand(MMO));
}
}
-
-bool Thumb1InstrInfo::
-spillCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- if (CSI.empty())
- return false;
-
- DebugLoc DL = DebugLoc::getUnknownLoc();
- if (MI != MBB.end()) DL = MI->getDebugLoc();
-
- MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, get(ARM::tPUSH));
- AddDefaultPred(MIB);
- MIB.addReg(0); // No write back.
- for (unsigned i = CSI.size(); i != 0; --i) {
- unsigned Reg = CSI[i-1].getReg();
- // Add the callee-saved register as live-in. It's killed at the spill.
- MBB.addLiveIn(Reg);
- MIB.addReg(Reg, RegState::Kill);
- }
- return true;
-}
-
-bool Thumb1InstrInfo::
-restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- const std::vector<CalleeSavedInfo> &CSI) const {
- MachineFunction &MF = *MBB.getParent();
- ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
- if (CSI.empty())
- return false;
-
- bool isVarArg = AFI->getVarArgsRegSaveSize() > 0;
- DebugLoc DL = MI->getDebugLoc();
- MachineInstrBuilder MIB = BuildMI(MF, DL, get(ARM::tPOP));
- AddDefaultPred(MIB);
- MIB.addReg(0); // No write back.
-
- bool NumRegs = 0;
- for (unsigned i = CSI.size(); i != 0; --i) {
- unsigned Reg = CSI[i-1].getReg();
- if (Reg == ARM::LR) {
- // Special epilogue for vararg functions. See emitEpilogue
- if (isVarArg)
- continue;
- Reg = ARM::PC;
- (*MIB).setDesc(get(ARM::tPOP_RET));
- MI = MBB.erase(MI);
- }
- MIB.addReg(Reg, getDefRegState(true));
- ++NumRegs;
- }
-
- // It's illegal to emit pop instruction without operands.
- if (NumRegs)
- MBB.insert(MI, &*MIB);
-
- return true;
-}
-
-MachineInstr *Thumb1InstrInfo::
-foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops, int FI) const {
- if (Ops.size() != 1) return NULL;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- MachineInstr *NewMI = NULL;
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVtgpr2gpr:
- case ARM::tMOVgpr2tgpr:
- case ARM::tMOVgpr2gpr: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- bool isKill = MI->getOperand(1).isKill();
- if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
- !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- break;
- NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tSpill))
- .addReg(SrcReg, getKillRegState(isKill))
- .addFrameIndex(FI).addImm(0));
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
- !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- break;
- bool isDead = MI->getOperand(0).isDead();
- NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tRestore))
- .addReg(DstReg,
- RegState::Define | getDeadRegState(isDead))
- .addFrameIndex(FI).addImm(0));
- }
- break;
- }
- }
-
- return NewMI;
-}