1 files changed, 35 insertions, 0 deletions
diff --git a/clang/test/Preprocessor/_Pragma-in-macro-arg.c b/clang/test/Preprocessor/_Pragma-in-macro-arg.c
new file mode 100644
index 0000000..2877bcb
--- /dev/null
+++ b/clang/test/Preprocessor/_Pragma-in-macro-arg.c
@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 %s -verify -Wconversion
+
+// Don't crash (rdar://11168596)
+#define A(desc) _Pragma("clang diagnostic push")  _Pragma("clang diagnostic ignored \"-Wparentheses\"") _Pragma("clang diagnostic pop")
+#define B(desc) A(desc)
+B(_Pragma("clang diagnostic ignored \"-Wparentheses\""))
+
+
+#define EMPTY(x)
+#define INACTIVE(x) EMPTY(x)
+
+#define ID(x) x
+#define ACTIVE(x) ID(x)
+
+// This should be ignored..
+INACTIVE(_Pragma("clang diagnostic ignored \"-Wconversion\""))
+
+#define IGNORE_CONV _Pragma("clang diagnostic ignored \"-Wconversion\"") _Pragma("clang diagnostic ignored \"-Wconversion\"")
+
+// ..as should this.
+INACTIVE(IGNORE_CONV)
+
+#define IGNORE_POPPUSH(Pop, Push, W, D) Push W D Pop
+IGNORE_POPPUSH(_Pragma("clang diagnostic pop"), _Pragma("clang diagnostic push"),
+               _Pragma("clang diagnostic ignored \"-Wconversion\""), int q = (double)1.0);
+
+int x1 = (double)1.0; // expected-warning {{implicit conversion}}
+
+ACTIVE(_Pragma) ("clang diagnostic ignored \"-Wconversion\"")) // expected-error {{_Pragma takes a parenthesized string literal}} \
+                                      expected-error {{expected identifier or '('}} expected-error {{expected ')'}} expected-note {{to match this '('}}
+
+// This should disable the warning.
+ACTIVE(IGNORE_CONV)
+
+int x2 = (double)1.0;