1 files changed, 44 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/builtin-bswap-7a.c b/gcc-4.9/gcc/testsuite/gcc.dg/builtin-bswap-7a.c
new file mode 100644
index 000000000..d77bd4783
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/builtin-bswap-7a.c
@@ -0,0 +1,44 @@
+/* { dg-do compile { target arm*-*-* alpha*-*-* ia64*-*-* x86_64-*-* s390x-*-* powerpc*-*-* rs6000-*-* } } */
+/* { dg-require-effective-target stdint_types } */
+/* { dg-require-effective-target lp64 } */
+/* { dg-options "-O2 -fdump-rtl-combine" } */
+
+/* The test is similiar to builtin-bswap-7.c but returns 1/2 instead
+   of 0/1 to prevent GCC from calculating the return value with
+   arithmetic instead of a comparison.  This requires the optimization
+   level to be bumped up to -O2 at least for x86_64.  */
+
+#include <stdint.h>
+
+#define BS(X) __builtin_bswap64(X)
+
+int foo1 (uint64_t a)
+{
+  if (BS (a) == 0xA00000000)
+    return 1;
+  return 2;
+}
+
+int foo2 (uint64_t a)
+{
+  if (BS (a) != 0xA00000000)
+    return 1;
+  return 2;
+}
+
+int foo3 (uint64_t a, uint64_t b)
+{
+  if (BS (a) == BS (b))
+    return 1;
+  return 2;
+}
+
+int foo4 (uint64_t a, uint64_t b)
+{
+  if (BS (a) != BS (b))
+    return 1;
+  return 2;
+}
+
+/* { dg-final { scan-rtl-dump-not "bswapdi" "combine" } } */
+/* { dg-final { cleanup-rtl-dump "combine" } } */