r281189 - [MS ABI] Add /include directives for dynamic TLS

[David Majnemer via cfe-commits]

Author: majnemer
Date: Sun Sep 11 21:51:43 2016
New Revision: 281189

URL: http://llvm.org/viewvc/llvm-project?rev=281189&view=rev
Log:
[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 at 12 for 32-bit).

This fixes PR30347.

Modified:
    cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp
    cfe/trunk/test/CodeGenCXX/ms-thread_local.cpp

Modified: cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp?rev=281189&r1=281188&r2=281189&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp (original)
+++ cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp Sun Sep 11 21:51:43 2016
@@ -2211,6 +2211,14 @@ void MicrosoftCXXABI::EmitThreadLocalIni
     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 at 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.

Modified: cfe/trunk/test/CodeGenCXX/ms-thread_local.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/ms-thread_local.cpp?rev=281189&r1=281188&r2=281189&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/ms-thread_local.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/ms-thread_local.cpp Sun Sep 11 21:51:43 2016
@@ -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 at 12"}