diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index de81949e0cc..3055256605a 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -2267,12 +2267,6 @@ static ArrayRef<MCPhysReg> get64BitArgumentXMMs(MachineFunction &MF, return makeArrayRef(std::begin(XMMArgRegs64Bit), std::end(XMMArgRegs64Bit)); } -static bool isOutlinedHandler(const MachineFunction &MF) { - const MachineModuleInfo &MMI = MF.getMMI(); - const Function *F = MF.getFunction(); - return MMI.getWinEHParent(F) != F; -} - SDValue X86TargetLowering::LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, @@ -2424,6 +2418,13 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain, MFI->CreateFixedObject(1, StackSize, true)); } + MachineModuleInfo &MMI = MF.getMMI(); + const Function *WinEHParent = nullptr; + if (IsWin64 && MMI.hasWinEHFuncInfo(Fn)) + WinEHParent = MMI.getWinEHParent(Fn); + bool IsWinEHOutlined = WinEHParent && WinEHParent != Fn; + bool IsWinEHParent = WinEHParent && WinEHParent == Fn; + // Figure out if XMM registers are in use. assert(!(MF.getTarget().Options.UseSoftFloat && Fn->hasFnAttribute(Attribute::NoImplicitFloat)) && @@ -2512,14 +2513,13 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain, if (!MemOps.empty()) Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps); - } else if (IsWin64 && isOutlinedHandler(MF)) { + } else if (IsWinEHOutlined) { // Get to the caller-allocated home save location. Add 8 to account // for the return address. int HomeOffset = TFI.getOffsetOfLocalArea() + 8; FuncInfo->setRegSaveFrameIndex(MFI->CreateFixedObject( /*Size=*/1, /*SPOffset=*/HomeOffset + 8, /*Immutable=*/false)); - MachineModuleInfo &MMI = MF.getMMI(); MMI.getWinEHFuncInfo(Fn) .CatchHandlerParentFrameObjIdx[const_cast<Function *>(Fn)] = FuncInfo->getRegSaveFrameIndex(); @@ -2600,6 +2600,17 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain, FuncInfo->setArgumentStackSize(StackSize); + if (IsWinEHParent) { + int UnwindHelpFI = MFI->CreateStackObject(8, 8, /*isSS=*/false); + SDValue StackSlot = DAG.getFrameIndex(UnwindHelpFI, MVT::i64); + MMI.getWinEHFuncInfo(MF.getFunction()).UnwindHelpFrameIdx = UnwindHelpFI; + SDValue Neg2 = DAG.getConstant(-2, MVT::i64); + Chain = DAG.getStore(Chain, dl, Neg2, StackSlot, + MachinePointerInfo::getFixedStack(UnwindHelpFI), + /*isVolatile=*/true, + /*isNonTemporal=*/false, /*Alignment=*/0); + } + return Chain; } |
