When checking for nonnull parameter attributes, also check the ParmVarDecl since the attribute may reside there, instead of just on the FunctionDecl. Fixes PR21668.

llvm-svn: 224039

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/Sema/nonnull.c b/clang/test/Sema/nonnull.c
index de47e9664ca..4b3df8518cf 100644
--- a/clang/test/Sema/nonnull.c
+++ b/clang/test/Sema/nonnull.c
@@ -141,3 +141,15 @@ void yet_another_evil_nonnull_func(int* pointer)
  }
 }
 
+void pr21668_1(__attribute__((nonnull)) const char *p, const char *s) {
+  if (p) // expected-warning {{nonnull parameter 'p' will evaluate to 'true' on first encounter}}
+    ;
+  if (s) // No warning
+    ;
+}
+
+void pr21668_2(__attribute__((nonnull)) const char *p) {
+  p = 0;
+  if (p) // No warning
+    ;
+}