Add a warning for implicit truncation of constant values due to

bitfield assignment.

Implements rdar://problem/7809123

llvm-svn: 118647

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/test/Sema/constant-conversion.c b/clang/test/Sema/constant-conversion.c
index cacd5968dc0..29571831653 100644
--- a/clang/test/Sema/constant-conversion.c
+++ b/clang/test/Sema/constant-conversion.c
@@ -7,3 +7,9 @@
 void test_6792488(void) {
   int x = 0x3ff0000000000000U; // expected-warning {{implicit conversion from 'unsigned long' to 'int' changes value from 4607182418800017408 to 0}}
 }
+
+void test_7809123(void) {
+  struct { int i5 : 5; } a;
+
+  a.i5 = 36; // expected-warning {{implicit truncation for 'int' to bitfield changes value from 36 to 4}}
+}