diff options
Diffstat (limited to 'clang/lib/CodeGen/CodeGenFunction.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CodeGenFunction.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp index 54ddbff..50e1638 100644 --- a/clang/lib/CodeGen/CodeGenFunction.cpp +++ b/clang/lib/CodeGen/CodeGenFunction.cpp @@ -882,6 +882,13 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy, if (Offset) Fn->addFnAttr("patchable-function-prefix", std::to_string(Offset)); } + // Instruct that functions for COFF/CodeView targets should start with a + // patchable instruction, but only on x86/x64. Don't forward this to ARM/ARM64 + // backends as they don't need it -- instructions on these architectures are + // always atomically patchable at runtime. + if (CGM.getCodeGenOpts().HotPatch && + getContext().getTargetInfo().getTriple().isX86()) + Fn->addFnAttr("patchable-function", "prologue-short-redirect"); // Add no-jump-tables value. if (CGM.getCodeGenOpts().NoUseJumpTables) |