[compiler-rt] [emutls] Handle unused parameters in a compiler agnostic way

The MSVC specific pragmas disable this warning, but the pragmas themselves
(when not guarded by any _MSC_VER ifdef) cause warnings for other targets,
e.g. when targeting mingw.

Instead silence the MSVC warnings about unused parameters by casting
the parameters to void.

Differential Revision: https://reviews.llvm.org/D91851

diff --git a/compiler-rt/lib/builtins/emutls.c b/compiler-rt/lib/builtins/emutls.c
index e0aa191..98cabd9 100644 (file)
--- a/compiler-rt/lib/builtins/emutls.c
+++ b/compiler-rt/lib/builtins/emutls.c
@@ -182,9 +182,10 @@ static void emutls_exit(void) {
   }
 }
 
-#pragma warning(push)
-#pragma warning(disable : 4100)
 static BOOL CALLBACK emutls_init(PINIT_ONCE p0, PVOID p1, PVOID *p2) {
+  (void)p0;
+  (void)p1;
+  (void)p2;
   emutls_mutex =
       (LPCRITICAL_SECTION)_aligned_malloc(sizeof(CRITICAL_SECTION), 16);
   if (!emutls_mutex) {
@@ -251,8 +252,6 @@ static __inline void __atomic_store_n(void *ptr, uintptr_t val, unsigned type) {
 
 #endif // __ATOMIC_RELEASE
 
-#pragma warning(pop)
-
 #endif // _WIN32
 
 static size_t emutls_num_object = 0; // number of allocated TLS objects