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Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/fwrapv-2.c')
-rw-r--r--gcc-4.9/gcc/testsuite/gcc.dg/fwrapv-2.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/fwrapv-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/fwrapv-2.c
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+++ b/gcc-4.9/gcc/testsuite/gcc.dg/fwrapv-2.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2003 Free Software Foundation.
+
+ Test that the -fno-wrapv command line option is accepted and enables
+ "unsafe" optimizations that rely on undefined arithmetic overflow.
+
+ Written by Roger Sayle, 31st May 2003. */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-wrapv" } */
+
+#include <limits.h>
+
+extern void abort ();
+
+int test(int x)
+{
+ return (2*x)/2;
+}
+
+main()
+{
+ int x = INT_MAX;
+
+ if (test(x) != x)
+ abort ();
+ return 0;
+}
+