1 files changed, 52 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c b/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c
new file mode 100644
index 000000000..78238e309
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/optimize-bswapsi-1.c
@@ -0,0 +1,52 @@
+/* { dg-do compile { target arm*-*-* alpha*-*-* i?86-*-* powerpc*-*-* rs6000-*-* x86_64-*-* s390*-*-* } } */
+/* { dg-require-effective-target stdint_types } */
+/* { dg-options "-O2 -fdump-tree-bswap" } */
+/* { dg-options "-O2 -fdump-tree-bswap -march=z900" { target s390-*-* } } */
+
+#include <stdint.h>
+
+#define __const_swab32(x) ((uint32_t)(				      \
+        (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |            \
+        (((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |            \
+        (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |            \
+        (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
+
+/* This byte swap implementation is used by the Linux kernel and the
+   GNU C library.  */
+
+uint32_t
+swap32_a (uint32_t in)
+{
+  return __const_swab32 (in);
+}
+
+/* The OpenSSH byte swap implementation.  */
+uint32_t
+swap32_b (uint32_t in)
+{
+  uint32_t a;
+
+  a = (in << 16) | (in >> 16);
+  a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8);
+
+  return a;
+}
+
+/* This variant is currently used by libgcc.  The difference is that
+   the bswap source and destination have a signed integer type which
+   requires a slightly higher search depth in order to dive through
+   the cast as well.  */
+
+typedef int SItype __attribute__ ((mode (SI)));
+
+SItype
+swap32_c (SItype u)
+{
+  return ((((u) & 0xff000000) >> 24)
+	  | (((u) & 0x00ff0000) >>  8)
+	  | (((u) & 0x0000ff00) <<  8)
+	  | (((u) & 0x000000ff) << 24));
+}
+
+/* { dg-final { scan-tree-dump-times "32 bit bswap implementation found at" 3 "bswap" } } */
+/* { dg-final { cleanup-tree-dump "bswap" } } */