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annotate gcc/testsuite/gcc.dg/fwrapv-1.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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111
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1 /* Copyright (C) 2003 Free Software Foundation.
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2
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3 Test that the -fwrapv command line option is accepted and disables
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4 "unsafe" optimizations that rely on undefined arithmetic overflow.
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5
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6 Written by Roger Sayle, 24th March 2003. */
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7
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8 /* { dg-do run } */
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9 /* { dg-options "-O2 -fwrapv" } */
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10
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11 #include <limits.h>
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12
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13 extern void abort ();
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14
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15 int test(int x)
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16 {
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17 return (2*x)/2;
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18 }
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19
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20 int
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21 main()
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22 {
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23 int x = INT_MAX;
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24
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25 if (test(x) == x)
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26 abort ();
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27 return 0;
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28 }
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29