diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 1130fcf9c36..80006c9f035 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -4129,6 +4129,17 @@ X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, InFlag = Chain.getValue(1); } + // Insert a pseudo instruction after noreturn calls that expands to int3 if + // this would be the last instruction in the funclet. If the return address of + // a call refers to the last PC of a function, the Windows SEH machinery can + // get confused about which function or scope the return address belongs to. + // MSVC inserts int3 after every noreturn function call, but LLVM only places + // them when it would cause a problem otherwise. + if (CLI.DoesNotReturn && Subtarget.isTargetWin64()) { + Chain = DAG.getNode(X86ISD::SEH_NORETURN, dl, NodeTys, Chain, InFlag); + InFlag = Chain.getValue(1); + } + // Handle result values, copying them out of physregs into vregs that we // return. return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG, @@ -28711,6 +28722,7 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const { case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS"; case X86ISD::VAARG_64: return "X86ISD::VAARG_64"; case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA"; + case X86ISD::SEH_NORETURN: return "X86ISD::SEH_NORETURN"; case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER"; case X86ISD::MFENCE: return "X86ISD::MFENCE"; case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA"; |
