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[MC] Change MCCFIInstruction::createDefCfa to cfiDefCfa which does not negate Offset

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The negative Offset has caused a bunch of problems and confused quite a
few call sites. Delete the unneeded negation and fix all call sites.
This commit is contained in:
Fangrui Song 2020-05-22 15:18:05 -07:00
parent b899bacfbc
commit 985b9e2acb
21 changed files with 37 additions and 40 deletions
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6
include/llvm/MC/MCDwarf.h
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@ -482,9 +482,9 @@ private:
public:
/// .cfi_def_cfa defines a rule for computing CFA as: take address from
/// Register and add Offset to it.
static MCCFIInstruction createDefCfa(MCSymbol *L, unsigned Register,
int Offset) {
return MCCFIInstruction(OpDefCfa, L, Register, -Offset, "");
static MCCFIInstruction cfiDefCfa(MCSymbol *L, unsigned Register,
int Offset) {
return MCCFIInstruction(OpDefCfa, L, Register, Offset, "");
}
/// .cfi_def_cfa_register modifies a rule for computing CFA. From now

6
lib/CodeGen/CFIInstrInserter.cpp
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@ -124,7 +124,7 @@ class CFIInstrInserter : public MachineFunctionPass {
/// if needed. The negated value is needed when creating CFI instructions that
/// set absolute offset.
int getCorrectCFAOffset(MachineBasicBlock *MBB) {
return -MBBVector[MBB->getNumber()].IncomingCFAOffset;
return MBBVector[MBB->getNumber()].IncomingCFAOffset;
}
void reportCFAError(const MBBCFAInfo &Pred, const MBBCFAInfo &Succ);
@ -314,7 +314,7 @@ bool CFIInstrInserter::insertCFIInstrs(MachineFunction &MF) {
// incoming offset and register of this block, add a def_cfa instruction
// with the correct offset and register for this block.
if (PrevMBBInfo->OutgoingCFARegister != MBBInfo.IncomingCFARegister) {
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::cfiDefCfa(
nullptr, MBBInfo.IncomingCFARegister, getCorrectCFAOffset(&MBB)));
BuildMI(*MBBInfo.MBB, MBBI, DL, TII->get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
@ -324,7 +324,7 @@ bool CFIInstrInserter::insertCFIInstrs(MachineFunction &MF) {
} else {
unsigned CFIIndex =
MF.addFrameInst(MCCFIInstruction::createDefCfaOffset(
nullptr, getCorrectCFAOffset(&MBB)));
nullptr, -getCorrectCFAOffset(&MBB)));
BuildMI(*MBBInfo.MBB, MBBI, DL, TII->get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
}

3
lib/CodeGen/MIRParser/MIParser.cpp
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@ -2256,9 +2256,8 @@ bool MIParser::parseCFIOperand(MachineOperand &Dest) {
if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
parseCFIOffset(Offset))
return true;
// NB: MCCFIInstruction::createDefCfa negates the offset.
CFIIndex =
MF.addFrameInst(MCCFIInstruction::createDefCfa(nullptr, Reg, -Offset));
MF.addFrameInst(MCCFIInstruction::cfiDefCfa(nullptr, Reg, Offset));
break;
case MIToken::kw_cfi_remember_state:
CFIIndex = MF.addFrameInst(MCCFIInstruction::createRememberState(nullptr));

2
lib/MC/MCStreamer.cpp
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@ -461,7 +461,7 @@ MCSymbol *MCStreamer::emitCFILabel() {
void MCStreamer::emitCFIDefCfa(int64_t Register, int64_t Offset) {
MCSymbol *Label = emitCFILabel();
MCCFIInstruction Instruction =
MCCFIInstruction::createDefCfa(Label, Register, Offset);
MCCFIInstruction::cfiDefCfa(Label, Register, -Offset);
MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
if (!CurFrame)
return;

4
lib/Target/AArch64/AArch64FrameLowering.cpp
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@ -1349,8 +1349,8 @@ void AArch64FrameLowering::emitPrologue(MachineFunction &MF,
if (HasFP) {
// Define the current CFA rule to use the provided FP.
unsigned Reg = RegInfo->getDwarfRegNum(FramePtr, true);
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
nullptr, Reg, StackGrowth - FixedObject));
unsigned CFIIndex = MF.addFrameInst(
MCCFIInstruction::cfiDefCfa(nullptr, Reg, FixedObject - StackGrowth));
BuildMI(MBB, MBBI, DL, TII->get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex)
.setMIFlags(MachineInstr::FrameSetup);

2
lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp
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@ -254,7 +254,7 @@ static MCAsmInfo *createAArch64MCAsmInfo(const MCRegisterInfo &MRI,
// Initial state of the frame pointer is SP.
unsigned Reg = MRI.getDwarfRegNum(AArch64::SP, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, Reg, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0);
MAI->addInitialFrameState(Inst);
return MAI;

2
lib/Target/ARC/MCTargetDesc/ARCMCTargetDesc.cpp
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@ -57,7 +57,7 @@ static MCAsmInfo *createARCMCAsmInfo(const MCRegisterInfo &MRI,
MCAsmInfo *MAI = new ARCMCAsmInfo(TT);
// Initial state of the frame pointer is SP.
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, ARC::SP, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, ARC::SP, 0);
MAI->addInitialFrameState(Inst);
return MAI;

4
lib/Target/ARM/ARMFrameLowering.cpp
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@ -593,9 +593,9 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF,
PushSize + FramePtrOffsetInPush,
MachineInstr::FrameSetup);
if (FramePtrOffsetInPush + PushSize != 0) {
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::cfiDefCfa(
nullptr, MRI->getDwarfRegNum(FramePtr, true),
-(FPCXTSaveSize + ArgRegsSaveSize - FramePtrOffsetInPush)));
FPCXTSaveSize + ArgRegsSaveSize - FramePtrOffsetInPush));
BuildMI(MBB, AfterPush, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex)
.setMIFlags(MachineInstr::FrameSetup);

2
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
View File

@ -200,7 +200,7 @@ static MCAsmInfo *createARMMCAsmInfo(const MCRegisterInfo &MRI,
MAI = new ARMELFMCAsmInfo(TheTriple);
unsigned Reg = MRI.getDwarfRegNum(ARM::SP, true);
MAI->addInitialFrameState(MCCFIInstruction::createDefCfa(nullptr, Reg, 0));
MAI->addInitialFrameState(MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0));
return MAI;
}

4
lib/Target/ARM/Thumb1FrameLowering.cpp
View File

@ -308,8 +308,8 @@ void Thumb1FrameLowering::emitPrologue(MachineFunction &MF,
.add(predOps(ARMCC::AL));
if(FramePtrOffsetInBlock) {
CFAOffset += FramePtrOffsetInBlock;
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
nullptr, MRI->getDwarfRegNum(FramePtr, true), CFAOffset));
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::cfiDefCfa(
nullptr, MRI->getDwarfRegNum(FramePtr, true), -CFAOffset));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex)
.setMIFlags(MachineInstr::FrameSetup);

4
lib/Target/Hexagon/HexagonFrameLowering.cpp
View File

@ -1056,9 +1056,9 @@ void HexagonFrameLowering::insertCFIInstructionsAt(MachineBasicBlock &MBB,
// | +-- Old SP (before allocframe)
// +-- New FP (after allocframe)
//
// MCCFIInstruction::createDefCfa subtracts the offset from the register.
// MCCFIInstruction::cfiDefCfa adds the offset from the register.
// MCCFIInstruction::createOffset takes the offset without sign change.
auto DefCfa = MCCFIInstruction::createDefCfa(FrameLabel, DwFPReg, -8);
auto DefCfa = MCCFIInstruction::cfiDefCfa(FrameLabel, DwFPReg, 8);
BuildMI(MBB, At, DL, CFID)
.addCFIIndex(MF.addFrameInst(DefCfa));
// R31 (return addr) = CFA - 4

5
lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
View File

@ -290,9 +290,8 @@ static MCAsmInfo *createHexagonMCAsmInfo(const MCRegisterInfo &MRI,
MCAsmInfo *MAI = new HexagonMCAsmInfo(TT);
// VirtualFP = (R30 + #0).
MCCFIInstruction Inst =
MCCFIInstruction::createDefCfa(nullptr,
MRI.getDwarfRegNum(Hexagon::R30, true), 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(
nullptr, MRI.getDwarfRegNum(Hexagon::R30, true), 0);
MAI->addInitialFrameState(Inst);
return MAI;

2
lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
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@ -95,7 +95,7 @@ static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI,
// Initial state of the frame pointer is R1.
unsigned Reg = isPPC64 ? PPC::X1 : PPC::R1;
MCCFIInstruction Inst =
MCCFIInstruction::createDefCfa(nullptr, MRI.getDwarfRegNum(Reg, true), 0);
MCCFIInstruction::cfiDefCfa(nullptr, MRI.getDwarfRegNum(Reg, true), 0);
MAI->addInitialFrameState(Inst);
return MAI;

2
lib/Target/RISCV/MCTargetDesc/RISCVMCTargetDesc.cpp
View File

@ -57,7 +57,7 @@ static MCAsmInfo *createRISCVMCAsmInfo(const MCRegisterInfo &MRI,
MCAsmInfo *MAI = new RISCVMCAsmInfo(TT);
Register SP = MRI.getDwarfRegNum(RISCV::X2, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, SP, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, SP, 0);
MAI->addInitialFrameState(Inst);
return MAI;

6
lib/Target/RISCV/RISCVFrameLowering.cpp
View File

@ -329,9 +329,9 @@ void RISCVFrameLowering::emitPrologue(MachineFunction &MF,
RealStackSize - RVFI->getVarArgsSaveSize(),
MachineInstr::FrameSetup);
// Emit ".cfi_def_cfa $fp, -RVFI->getVarArgsSaveSize()"
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
nullptr, RI->getDwarfRegNum(FPReg, true), -RVFI->getVarArgsSaveSize()));
// Emit ".cfi_def_cfa $fp, RVFI->getVarArgsSaveSize()"
unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::cfiDefCfa(
nullptr, RI->getDwarfRegNum(FPReg, true), RVFI->getVarArgsSaveSize()));
BuildMI(MBB, MBBI, DL, TII->get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
}

4
lib/Target/Sparc/MCTargetDesc/SparcMCTargetDesc.cpp
View File

@ -37,7 +37,7 @@ static MCAsmInfo *createSparcMCAsmInfo(const MCRegisterInfo &MRI,
const MCTargetOptions &Options) {
MCAsmInfo *MAI = new SparcELFMCAsmInfo(TT);
unsigned Reg = MRI.getDwarfRegNum(SP::O6, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, Reg, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0);
MAI->addInitialFrameState(Inst);
return MAI;
}
@ -47,7 +47,7 @@ static MCAsmInfo *createSparcV9MCAsmInfo(const MCRegisterInfo &MRI,
const MCTargetOptions &Options) {
MCAsmInfo *MAI = new SparcELFMCAsmInfo(TT);
unsigned Reg = MRI.getDwarfRegNum(SP::O6, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, Reg, 2047);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, -2047);
MAI->addInitialFrameState(Inst);
return MAI;
}

7
lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.cpp
View File

@ -150,10 +150,9 @@ static MCAsmInfo *createSystemZMCAsmInfo(const MCRegisterInfo &MRI,
const Triple &TT,
const MCTargetOptions &Options) {
MCAsmInfo *MAI = new SystemZMCAsmInfo(TT);
MCCFIInstruction Inst =
MCCFIInstruction::createDefCfa(nullptr,
MRI.getDwarfRegNum(SystemZ::R15D, true),
SystemZMC::CFAOffsetFromInitialSP);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(
nullptr, MRI.getDwarfRegNum(SystemZ::R15D, true),
-SystemZMC::CFAOffsetFromInitialSP);
MAI->addInitialFrameState(Inst);
return MAI;
}

2
lib/Target/VE/MCTargetDesc/VEMCTargetDesc.cpp
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@ -36,7 +36,7 @@ static MCAsmInfo *createVEMCAsmInfo(const MCRegisterInfo &MRI, const Triple &TT,
const MCTargetOptions &Options) {
MCAsmInfo *MAI = new VEELFMCAsmInfo(TT);
unsigned Reg = MRI.getDwarfRegNum(VE::SX11, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, Reg, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0);
MAI->addInitialFrameState(Inst);
return MAI;
}

4
lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
View File

@ -349,8 +349,8 @@ static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI,
// Initial state of the frame pointer is esp+stackGrowth.
unsigned StackPtr = is64Bit ? X86::RSP : X86::ESP;
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(
nullptr, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(
nullptr, MRI.getDwarfRegNum(StackPtr, true), stackGrowth);
MAI->addInitialFrameState(Inst);
// Add return address to move list

4
lib/Target/X86/X86FrameLowering.cpp
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@ -1842,8 +1842,8 @@ void X86FrameLowering::emitEpilogue(MachineFunction &MF,
if (NeedsDwarfCFI) {
unsigned DwarfStackPtr =
TRI->getDwarfRegNum(Is64Bit ? X86::RSP : X86::ESP, true);
BuildCFI(MBB, MBBI, DL, MCCFIInstruction::createDefCfa(
nullptr, DwarfStackPtr, -SlotSize));
BuildCFI(MBB, MBBI, DL,
MCCFIInstruction::cfiDefCfa(nullptr, DwarfStackPtr, SlotSize));
if (!MBB.succ_empty() && !MBB.isReturnBlock()) {
unsigned DwarfFramePtr = TRI->getDwarfRegNum(MachineFramePtr, true);
BuildCFI(MBB, AfterPop, DL,

2
lib/Target/XCore/MCTargetDesc/XCoreMCTargetDesc.cpp
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@ -60,7 +60,7 @@ static MCAsmInfo *createXCoreMCAsmInfo(const MCRegisterInfo &MRI,
MCAsmInfo *MAI = new XCoreMCAsmInfo(TT);
// Initial state of the frame pointer is SP.
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, XCore::SP, 0);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, XCore::SP, 0);
MAI->addInitialFrameState(Inst);
return MAI;