vendor/clang/clang-trunk-r351319

1 files changed, 18 insertions, 0 deletions

diff --git a/test/Sema/format-strings-bitfield-promotion.c b/test/Sema/format-strings-bitfield-promotion.c
new file mode 100644
index 0000000000000..cbe00e7510dd8
--- /dev/null
+++ b/test/Sema/format-strings-bitfield-promotion.c
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple x86_64-unknown-windows-msvc -fsyntax-only -verify %s
+
+int printf(const char *restrict, ...);
+
+struct bitfields {
+  long a : 2;
+  unsigned long b : 2;
+  long c : 32;          // assumes that int is 32 bits
+  unsigned long d : 32; // assumes that int is 32 bits
+} bf;
+
+void bitfield_promotion() {
+  printf("%ld", bf.a); // expected-warning {{format specifies type 'long' but the argument has type 'int'}}
+  printf("%lu", bf.b); // expected-warning {{format specifies type 'unsigned long' but the argument has type 'int'}}
+  printf("%ld", bf.c); // expected-warning {{format specifies type 'long' but the argument has type 'int'}}
+  printf("%lu", bf.d); // expected-warning {{format specifies type 'unsigned long' but the argument has type 'unsigned int'}}
+}