tests for todo diagnostic & static_assert

Author: DanShaders

clang/test/CodeGen/gcc_struct-msvc-todo-1.c

@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -emit-llvm-only -triple x86_64-pc-windows-msvc -verify %s
+
+// expected-error@+1 {{Itanium-compatible layout for the Microsoft C++ ABI is not yet supported}}
+struct {
+    int a;
+} __attribute__((gcc_struct)) t1;

clang/test/CodeGen/gcc_struct-msvc-todo-2.c

@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -emit-llvm-only -triple x86_64-pc-windows-msvc -fms-layout-compatibility=itanium -verify %s
+
+// expected-error@+1 {{Itanium-compatible layout for the Microsoft C++ ABI is not yet supported}}
+struct {
+    int a;
+} t1;

clang/test/CodeGen/gcc_struct.c

@@ -7,12 +7,12 @@ struct {
     int a : 24;
     char b : 8;
 } __attribute__((gcc_struct)) t1;
-static int a1[(sizeof(t1) == 4) - 1];
+_Static_assert(sizeof(t1) == 4, "");
 
 #pragma ms_struct on
 struct {
     int a : 24;
     char b : 8;
 } __attribute__((gcc_struct)) t2;
-static int a2[(sizeof(t2) == 4) - 1];
+_Static_assert(sizeof(t2) == 4, "");
 #pragma ms_struct off