[CodeGen][Darwin] Set the calling-convention of thread-local variable
initialization functions to 'cxx_fast_tlscc'.
This fixes a bug where instructions calling initialization functions for
thread-local static members of c++ template classes were using calling
convention 'cxx_fast_tlscc' while the called functions weren't annotated
with the calling convention.
rdar://problem/40447463
Differential Revision: https://reviews.llvm.org/D47354
llvm-svn: 333447
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index b608adf..9768e71 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -2450,8 +2450,12 @@
if (InitIsInitFunc) {
if (Init) {
llvm::CallInst *CallVal = Builder.CreateCall(Init);
- if (isThreadWrapperReplaceable(VD, CGM))
+ if (isThreadWrapperReplaceable(VD, CGM)) {
CallVal->setCallingConv(llvm::CallingConv::CXX_FAST_TLS);
+ llvm::Function *Fn =
+ cast<llvm::Function>(cast<llvm::GlobalAlias>(Init)->getAliasee());
+ Fn->setCallingConv(llvm::CallingConv::CXX_FAST_TLS);
+ }
}
} else {
// Don't know whether we have an init function. Call it if it exists.