Serialize `#pragma detect_mismatch`.

This is like r262493, but for pragma detect_mismatch instead of pragma comment.
The two pragmas have similar behavior, so use the same approach for both.

llvm-svn: 262506

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/test/PCH/pragma-detect_mismatch.c b/clang/test/PCH/pragma-detect_mismatch.c
new file mode 100644
index 00000000000..b6233ed8a4b
--- /dev/null
+++ b/clang/test/PCH/pragma-detect_mismatch.c
@@ -0,0 +1,23 @@
+// Test this without pch.
+// RUN: %clang_cc1 %s -Wunknown-pragmas -Werror -triple x86_64-pc-win32 -fms-extensions -emit-llvm -include %s -o - | FileCheck %s
+
+// Test with pch.
+// RUN: %clang_cc1 %s -Wunknown-pragmas -Werror -triple x86_64-pc-win32 -fms-extensions -emit-pch -o %t
+// RUN: %clang_cc1 %s -Wunknown-pragmas -Werror -triple x86_64-pc-win32 -fms-extensions -emit-llvm -include-pch %t -o - | FileCheck %s
+
+// The first run line creates a pch, and since at that point HEADER is not
+// defined, the only thing contained in the pch is the pragma. The second line
+// then includes that pch, so HEADER is defined and the actual code is compiled.
+// The check then makes sure that the pragma is in effect in the file that
+// includes the pch.
+
+#ifndef HEADER
+#define HEADER
+#pragma detect_mismatch("FruitKind", "Jaboticaba")
+
+#else
+
+// CHECK: "/DEFAULTLIB:foo.lib"
+// CHECK: "/FAILIFMISMATCH:\22FruitKind=Jaboticaba\22"
+
+#endif