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authorLorry <lorry@roadtrain.codethink.co.uk>2012-01-09 13:47:42 +0000
committerLorry <lorry@roadtrain.codethink.co.uk>2012-01-09 13:47:42 +0000
commitb4a5df67f1382a33f4535eb1b10600ca52d294d3 (patch)
treed4571b191c2cfc0f5045bd27b54f8a48e70787a8 /gcc/testsuite/gcc.dg/pr43280.c
downloadgcc-tarball-b4a5df67f1382a33f4535eb1b10600ca52d294d3.tar.gz
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Diffstat (limited to 'gcc/testsuite/gcc.dg/pr43280.c')
-rw-r--r--gcc/testsuite/gcc.dg/pr43280.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr43280.c b/gcc/testsuite/gcc.dg/pr43280.c
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index 0000000000..dfb369b5de
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr43280.c
@@ -0,0 +1,30 @@
+/* { dg-do run } */
+/* { dg-require-effective-target stdint_types } */
+/* { dg-options "-O2" } */
+
+#include <stdint.h>
+
+extern void abort (void);
+
+uint64_t __attribute__((noinline))
+byteswap64(uint64_t x)
+{
+ uint32_t a = x >> 32;
+ uint32_t b = (uint32_t) x;
+ return ((uint64_t) ((((((b)) >> (8)) | (((b)) << (32 - (8)))) & 0xff00ff00L)
+ | (((((b)) << (8)) | (((b)) >> (32 - (8)))) & 0x00ff00ffL)) << 32)
+ | (uint64_t) ((((((a)) >> (8)) | (((a)) << (32 - (8)))) & 0xff00ff00L)
+ | (((((a)) << (8)) | (((a)) >> (32 - (8)))) & 0x00ff00ffL));
+}
+
+int
+main ()
+{
+ uint64_t in = (uint64_t)0x01020304 << 32 | 0x05060708;
+ uint64_t cmp = (uint64_t)0x08070605 << 32 | 0x04030201;
+
+ if (cmp != byteswap64 (in))
+ abort ();
+
+ return 0;
+}