Add attribute "format" support for typedefs of function pointers.

llvm-svn: 50906

2 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 748b66fb3e1..afe877fb97e 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -2338,6 +2338,8 @@ static const FunctionTypeProto *getFunctionProto(Decl *d) {
     Ty = decl->getType();
   else if (FieldDecl *decl = dyn_cast<FieldDecl>(d))
     Ty = decl->getType();
+  else if (TypedefDecl* decl = dyn_cast<TypedefDecl>(d))
+    Ty = decl->getUnderlyingType();
   else
     return 0;
 
diff --git a/clang/test/Sema/format-attribute.c b/clang/test/Sema/format-attribute.c
index 8eefe3f0654..ecdef9dde1a 100644
--- a/clang/test/Sema/format-attribute.c
+++ b/clang/test/Sema/format-attribute.c
@@ -22,3 +22,5 @@ struct _mystruct {
   int (*printf)(const char *format, ...) __attribute__((__format__(printf, 1, 2))); // no-error
   int (*printf2)(double format, ...) __attribute__((__format__(printf, 1, 2))); // expected-error {{format argument not a string type}}
 };
+
+typedef int (*f3_ptr)(char*,...) __attribute__((format(printf,1,0))); // no-error