1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr40501.c b/gcc/testsuite/gcc.dg/pr40501.c
new file mode 100644
index 000000000..0e43e63c6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr40501.c
@@ -0,0 +1,24 @@
+/* { dg-do compile { target alpha*-*-* ia64*-*-* x86_64-*-* s390x-*-* } } */
+/* { dg-options "-O2" } */
+/* { dg-require-effective-target lp64 } */
+
+/* PR middle-end/40501 */
+
+/* This once failed due to the bswap pass missing to add the type
+   casts of the signed argument and result to the proper unsigned
+   types.  */
+
+typedef long int int64_t;
+
+int64_t
+swap64 (int64_t n)
+{
+  return (((n & (((int64_t) 0xff) )) << 56) |
+	  ((n & (((int64_t) 0xff) << 8)) << 40) |
+	  ((n & (((int64_t) 0xff) << 16)) << 24) |
+	  ((n & (((int64_t) 0xff) << 24)) << 8) |
+	  ((n & (((int64_t) 0xff) << 32)) >> 8) |
+	  ((n & (((int64_t) 0xff) << 40)) >> 24) |
+	  ((n & (((int64_t) 0xff) << 48)) >> 40) |
+	  ((n & (((int64_t) 0xff) << 56)) >> 56));
+}