1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/c-c++-common/cxxbitfields-5.c b/gcc/testsuite/c-c++-common/cxxbitfields-5.c
new file mode 100644
index 00000000000..69e4e1067bf
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/cxxbitfields-5.c
@@ -0,0 +1,29 @@
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 --param allow-store-data-races=0" } */
+
+#include <stdlib.h>
+
+struct bits
+{
+  char a;
+  int b:7;
+  int c:9;
+  unsigned char d;
+} x;
+
+struct bits *p;
+
+static void allocit()
+{
+  p = (struct bits *) malloc (sizeof (struct bits));
+}
+
+/* Store into <c> should not clobber <d>.  */
+/* We should not use a 32-bit move to store into p->, but a smaller move.  */
+void foo()
+{
+  allocit();
+  p -> c = 55;
+}
+
+/* { dg-final { scan-assembler-not "movl\t\\(" } } */