Mercurial > hg > CbC > CbC_gcc
comparison gcc/testsuite/gcc.dg/strlenopt-41.c @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | |
| children |
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| 111:04ced10e8804 | 131:84e7813d76e9 |
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| 1 /* PR tree-optimization/83671 - fix for false positive reported by | |
| 2 -Wstringop-overflow does not work with inlining | |
| 3 Verify that the length the empty string is folded to zero even at -O1 | |
| 4 regardless of offset into it. | |
| 5 Also verify that the length of a non-empty string isn't folded given | |
| 6 a variable offset. | |
| 7 { dg-do compile } | |
| 8 { dg-options "-O1 -fdump-tree-optimized" } */ | |
| 9 | |
| 10 #include "strlenopt.h" | |
| 11 | |
| 12 inline unsigned length (const char *s) | |
| 13 { | |
| 14 return __builtin_strlen (s); | |
| 15 } | |
| 16 | |
| 17 void check_length_cst (int i) | |
| 18 { | |
| 19 unsigned len = length (&""[i]); | |
| 20 | |
| 21 if (len) | |
| 22 __builtin_abort (); | |
| 23 } | |
| 24 | |
| 25 void check_length_var (int i) | |
| 26 { | |
| 27 unsigned len = length (&"1"[i]); | |
| 28 | |
| 29 if (len != 1) | |
| 30 __builtin_abort (); | |
| 31 } | |
| 32 | |
| 33 /* { dg-final { scan-tree-dump-times "abort" 1 "optimized" } } | |
| 34 { dg-final { scan-tree-dump-times "strlen" 1 "optimized" } } */ |