Mercurial > hg > CbC > CbC_gcc
annotate gcc/testsuite/gcc.dg/Wstrict-overflow-18.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
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children |
rev | line source |
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111 | 1 /* { dg-do compile } */ |
2 /* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow" } */ | |
3 | |
4 /* Warn about an overflow when folding i > 0, p->a - p->b can be larger | |
5 than INT_MAX and thus i can wrap. */ | |
6 | |
7 struct c { unsigned int a; unsigned int b; }; | |
8 extern void bar (struct c *); | |
9 int | |
10 foo (struct c *p) | |
11 { | |
12 int i; | |
13 int sum = 0; | |
14 | |
15 for (i = 0; i < p->a - p->b; ++i) | |
16 { | |
17 /* See PR80511 for the XFAIL. */ | |
18 if (i > 0) /* { dg-warning "signed overflow" "" { xfail *-*-* } } */ | |
19 sum += 2; | |
20 bar (p); | |
21 } | |
22 return sum; | |
23 } |