diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86FrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.cpp | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp index e5140778e75..dd68cb154a5 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.cpp +++ b/llvm/lib/Target/X86/X86FrameLowering.cpp @@ -924,6 +924,7 @@ void X86FrameLowering::BuildStackAlignAND(MachineBasicBlock &MBB, Notes: - .seh directives are emitted only for Windows 64 ABI + - .cv_fpo directives are emitted on win32 when emitting CodeView - .cfi directives are emitted for all other ABIs - for 32-bit code, substitute %e?? registers for %r?? */ @@ -949,7 +950,9 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, bool HasFP = hasFP(MF); bool IsWin64CC = STI.isCallingConvWin64(Fn->getCallingConv()); bool IsWin64Prologue = MF.getTarget().getMCAsmInfo()->usesWindowsCFI(); - bool NeedsWinCFI = IsWin64Prologue && Fn->needsUnwindTableEntry(); + bool NeedsWin64CFI = IsWin64Prologue && Fn->needsUnwindTableEntry(); + bool NeedsWinFPO = STI.isTargetWin32() && MMI.getModule()->getCodeViewFlag(); + bool NeedsWinCFI = NeedsWin64CFI || NeedsWinFPO; bool NeedsDwarfCFI = !IsWin64Prologue && (MMI.hasDebugInfo() || Fn->needsUnwindTableEntry()); unsigned FramePtr = TRI->getFrameRegister(MF); @@ -958,7 +961,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, ? getX86SubSuperRegister(FramePtr, 64) : FramePtr; unsigned BasePtr = TRI->getBaseRegister(); bool HasWinCFI = false; - + // Debug location must be unknown since the first debug location is used // to determine the end of the prologue. DebugLoc DL; @@ -1120,6 +1123,15 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, BuildCFI(MBB, MBBI, DL, MCCFIInstruction::createDefCfaRegister( nullptr, DwarfFramePtr)); } + + if (NeedsWinFPO) { + // .cv_fpo_setframe $FramePtr + HasWinCFI = true; + BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_SetFrame)) + .addImm(FramePtr) + .addImm(0) + .setMIFlag(MachineInstr::FrameSetup); + } } } else { assert(!IsFunclet && "funclets without FPs not yet implemented"); @@ -1155,8 +1167,9 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, if (NeedsWinCFI) { HasWinCFI = true; - BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_PushReg)).addImm(Reg).setMIFlag( - MachineInstr::FrameSetup); + BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_PushReg)) + .addImm(Reg) + .setMIFlag(MachineInstr::FrameSetup); } } @@ -1295,6 +1308,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, // If this is not a funclet, emit the CFI describing our frame pointer. if (NeedsWinCFI && !IsFunclet) { + assert(!NeedsWinFPO && "this setframe incompatible with FPO data"); HasWinCFI = true; BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_SetFrame)) .addImm(FramePtr) @@ -1333,6 +1347,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF, Offset += SEHFrameOffset; HasWinCFI = true; + assert(!NeedsWinFPO && "SEH_SaveXMM incompatible with FPO data"); BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_SaveXMM)) .addImm(Reg) .addImm(Offset) @@ -1534,7 +1549,7 @@ void X86FrameLowering::emitEpilogue(MachineFunction &MF, Is64BitILP32 ? getX86SubSuperRegister(FramePtr, 64) : FramePtr; bool IsWin64Prologue = MF.getTarget().getMCAsmInfo()->usesWindowsCFI(); - bool NeedsWinCFI = + bool NeedsWin64CFI = IsWin64Prologue && MF.getFunction()->needsUnwindTableEntry(); bool IsFunclet = MBBI == MBB.end() ? false : isFuncletReturnInstr(*MBBI); @@ -1639,7 +1654,7 @@ void X86FrameLowering::emitEpilogue(MachineFunction &MF, // into the epilogue. To cope with that, we insert an epilogue marker here, // then replace it with a 'nop' if it ends up immediately after a CALL in the // final emitted code. - if (NeedsWinCFI && MF.hasWinCFI()) + if (NeedsWin64CFI && MF.hasWinCFI()) BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_Epilogue)); if (Terminator == MBB.end() || !isTailCallOpcode(Terminator->getOpcode())) { |
