Mercurial > hg > CbC > CbC_gcc
comparison gcc/testsuite/gcc.dg/fold-bcopy.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 1830386684a0 |
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| 68:561a7518be6b | 111:04ced10e8804 |
|---|---|
| 1 /* PR tree-optimization/80933 - redundant bzero/bcopy calls not eliminated | |
| 2 { dg-do compile } | |
| 3 { dg-options "-O0 -Wall -fdump-tree-gimple" } */ | |
| 4 | |
| 5 void f0 (void *dst, const void *src, unsigned n) | |
| 6 { | |
| 7 /* Bcopy(src, dst, ...) corresponds to memmove(dst, src, ...), | |
| 8 with the first two arguments transposed, not memcpy. */ | |
| 9 __builtin_bcopy (src, dst, n); | |
| 10 } | |
| 11 | |
| 12 void f1 (void *p, const void *q, unsigned n) | |
| 13 { | |
| 14 /* A call with zero size should be eliminated. */ | |
| 15 __builtin_bcopy (q, p, 0); | |
| 16 } | |
| 17 | |
| 18 int f2 (const void *p, const void *q, unsigned n) | |
| 19 { | |
| 20 return __builtin_bcmp (p, q, n); | |
| 21 } | |
| 22 | |
| 23 int f3 (const void *p, const void *q) | |
| 24 { | |
| 25 /* A call with zero size should be folded into 0. */ | |
| 26 return __builtin_bcmp (p, q, 0); | |
| 27 } | |
| 28 | |
| 29 int f4 (const void *p, unsigned n) | |
| 30 { | |
| 31 /* A call with the same argument should also be folded into 0. */ | |
| 32 return __builtin_bcmp (p, p, n); | |
| 33 } | |
| 34 | |
| 35 void f5 (void *p, unsigned n) | |
| 36 { | |
| 37 __builtin_bzero (p, n); | |
| 38 } | |
| 39 | |
| 40 void f6 (void *p) | |
| 41 { | |
| 42 /* A call with zero size should be eliminated. */ | |
| 43 __builtin_bzero (p, 0); | |
| 44 } | |
| 45 | |
| 46 /* Verify that calls to bcmp, bcopy, and bzero have all been removed | |
| 47 and one of each replaced with memcmp, memmove, and memset, respectively. | |
| 48 The remaining three should be eliminated. | |
| 49 { dg-final { scan-tree-dump-not "bcmp|bcopy|bzero" "gimple" } } | |
| 50 { dg-final { scan-tree-dump-times "memcmp|memmove|memset" 3 "gimple" } } | |
| 51 | |
| 52 Verify that the bcopy to memmove transformation correctly transposed | |
| 53 the source and destination pointer arguments. | |
| 54 { dg-final { scan-tree-dump-times "memmove \\(dst, src" 1 "gimple" } } */ |