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[MS ABI] Add /include directives for dynamic TLS 

MSVC emits /include directives in the .drective section for the
__dyn_tls_init function (decorated as ___dyn_tls_init@12 for 32-bit).

This fixes PR30347.

llvm-svn: 281189
This commit is contained in:
David Majnemer 2016-09-12 02:51:43 +00:00
parent cd0fffb6e1
commit cb60a4305b
2 changed files with 13 additions and 0 deletions
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8
clang/lib/CodeGen/MicrosoftCXXABI.cpp
View File

@ -2211,6 +2211,14 @@ void MicrosoftCXXABI::EmitThreadLocalInitFuncs(
CodeGenModule &CGM, ArrayRef<const VarDecl *> CXXThreadLocals,
ArrayRef<llvm::Function *> CXXThreadLocalInits,
ArrayRef<const VarDecl *> CXXThreadLocalInitVars) {
if (CXXThreadLocalInits.empty())
return;
CGM.AppendLinkerOptions(CGM.getTarget().getTriple().getArch() ==
llvm::Triple::x86
? "/include:___dyn_tls_init@12"
: "/include:__dyn_tls_init");
// This will create a GV in the .CRT$XDU section. It will point to our
// initialization function. The CRT will call all of these function
// pointers at start-up time and, eventually, at thread-creation time.

5
clang/test/CodeGenCXX/ms-thread_local.cpp
View File

@ -26,3 +26,8 @@ A f() {
(void)b;
return c;
}
// CHECK: !llvm.module.flags = !{{{.*}}}
// CHECK: !{{[0-9]+}} = !{i32 6, !"Linker Options", ![[link_opts:[0-9]+]]}
// CHECK: ![[link_opts]] = !{![[dyn_tls_init:[0-9]+]]}
// CHECK: ![[dyn_tls_init]] = !{!"/include:___dyn_tls_init@12"}