Add _alignof and __builtin_alignof as aliases for __alignof in
Microsoft mode, from Will Wilson!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156940 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/MicrosoftExtensions.c b/test/Parser/MicrosoftExtensions.c
index 1ef326a..6b00534 100644
--- a/test/Parser/MicrosoftExtensions.c
+++ b/test/Parser/MicrosoftExtensions.c
@@ -29,6 +29,11 @@
 }
 _inline int foo99() { return 99; }
 
+void test_ms_alignof_alias() {
+  unsigned int s = _alignof(int);
+  s = __builtin_alignof(int);
+}
+
 void *_alloca(int);
 
 void foo() {