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| author | Yaron Keren <yaron.keren@gmail.com> | 2014-04-19 13:47:43 +0000 |
|---|---|---|
| committer | Yaron Keren <yaron.keren@gmail.com> | 2014-04-19 13:47:43 +0000 |
| commit | 64b2297786f7fd6f5fa24cdd4db0298fbf211466 (patch) | |
| tree | c5250834c0fd832fbdb7363822269f603cee844f /include | |
| parent | 2fa9e6ca34a1f696904c0b8006c91d64679c2b51 (diff) | |
| download | llvm-64b2297786f7fd6f5fa24cdd4db0298fbf211466.tar.gz llvm-64b2297786f7fd6f5fa24cdd4db0298fbf211466.tar.bz2 llvm-64b2297786f7fd6f5fa24cdd4db0298fbf211466.tar.xz | |
Patch by Vadim Chugunov
Win64 stack unwinder gets confused when execution flow "falls through" after
a call to 'noreturn' function. This fixes the "missing epilogue" problem by
emitting a trap instruction for IR 'unreachable' on x86_x64-pc-windows.
A secondary use for it would be for anyone wanting to make double-sure that
'noreturn' functions, indeed, do not return.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206684 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Target/TargetOptions.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetOptions.h b/include/llvm/Target/TargetOptions.h index 122324fbb0..71a1fcf4c0 100644 --- a/include/llvm/Target/TargetOptions.h +++ b/include/llvm/Target/TargetOptions.h @@ -51,6 +51,7 @@ namespace llvm { EnableFastISel(false), PositionIndependentExecutable(false), UseInitArray(false), DisableIntegratedAS(false), CompressDebugSections(false), + TrapUnreachable(false), TrapFuncName(""), FloatABIType(FloatABI::Default), AllowFPOpFusion(FPOpFusion::Standard) {} @@ -162,6 +163,9 @@ namespace llvm { /// Compress DWARF debug sections. unsigned CompressDebugSections : 1; + /// Emit target-specific trap instruction for 'unreachable' IR instructions. + unsigned TrapUnreachable : 1; + /// getTrapFunctionName - If this returns a non-empty string, this means /// isel should lower Intrinsic::trap to a call to the specified function /// name instead of an ISD::TRAP node. @@ -216,6 +220,7 @@ inline bool operator==(const TargetOptions &LHS, ARE_EQUAL(EnableFastISel) && ARE_EQUAL(PositionIndependentExecutable) && ARE_EQUAL(UseInitArray) && + ARE_EQUAL(TrapUnreachable) && ARE_EQUAL(TrapFuncName) && ARE_EQUAL(FloatABIType) && ARE_EQUAL(AllowFPOpFusion); |