Format string checking: selectively ignore implicit casts to 'int'

when checking if the format specifier matches the type of the data
argument and the length modifier indicates the data type is 'char' or
'short'.

llvm-svn: 94992

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/test/Sema/format-strings.c b/clang/test/Sema/format-strings.c
index 02e39a426be..a055bfe1822 100644
--- a/clang/test/Sema/format-strings.c
+++ b/clang/test/Sema/format-strings.c
@@ -162,6 +162,11 @@ void test10(int x, float f, int i, long long lli) {
   printf("%.", x);  // expected-warning{{incomplete format specifier}}
   printf("%f", 4); // expected-warning{{conversion specifies type 'double' but the argument has type 'int'}}
   printf("%qd", lli);
+  printf("hhX %hhX", (unsigned char)10); // no-warning
+  printf("llX %llX", (long long) 10); // no-warning
+  // This is fine, because there is an implicit conversion to an int.
+  printf("%d", (unsigned char) 10); // no-warning
+  printf("%d", (long long) 10); // expected-warning{{conversion specifies type 'int' but the argument has type 'long long'}}
 } 
 
 typedef struct __aslclient *aslclient;