MS ABI: Implement driver-level support for thread-safe statics
Decide whether or not to use thread-safe statics depending on whether or
not we have an explicit request from the driver. If we don't have an
explicit request, infer which behavior to use depending on the
compatibility version we are targeting.
N.B. CodeGen support is still ongoing.
llvm-svn: 232906
diff --git a/clang/test/Driver/cl-options.c b/clang/test/Driver/cl-options.c
index 2dc810d..3a22154 100644
--- a/clang/test/Driver/cl-options.c
+++ b/clang/test/Driver/cl-options.c
@@ -317,6 +317,14 @@
// RTTI-NOT: "-fno-rtti-data"
// RTTI-NOT: "-fno-rtti"
+// thread safe statics are off for versions < 19.
+// RUN: %clang_cl /c -### -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
+// RUN: %clang_cl /Zc:threadSafeInit /Zc:threadSafeInit- /c -### -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
+// NoThreadSafeStatics: "-fno-threadsafe-statics"
+
+// RUN: %clang_cl /Zc:threadSafeInit /c -### -- %s 2>&1 | FileCheck -check-prefix=ThreadSafeStatics %s
+// ThreadSafeStatics-NOT: "-fno-threadsafe-statics"
+
// Accept "core" clang options.
// (/Zs is for syntax-only)
// RUN: %clang_cl \