Mercurial > hg > CbC > CbC_gcc
diff gcc/testsuite/gcc.dg/strlenopt-11.c @ 111:04ced10e8804
gcc 7
author | kono |
---|---|
date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 1830386684a0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/strlenopt-11.c Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,75 @@ +/* { dg-do run } */ +/* { dg-options "-O2 -fdump-tree-strlen" } */ + +#include "strlenopt.h" + +__attribute__((noinline, noclone)) void +fn1 (char *p, const char *z, size_t *lp) +{ + char *q, *r, *s; + char buf[64]; + size_t l[11]; + /* The first strlen stays, all the strcpy calls can be optimized + into memcpy and most other strlen calls and all strchr calls + optimized away. l[6] = strlen (r); and l[9] = strlen (r); need + to stay, because we need to invalidate the knowledge about + r strlen after strcpy (q, "jklmnopqrst"). */ + l[0] = strlen (z); + strcpy (buf, z); + strcpy (p, "abcde"); + q = strchr (p, '\0'); + strcpy (q, "efghi"); + r = strchr (q, '\0'); + strcpy (r, buf); + l[1] = strlen (p); + l[2] = strlen (q); + l[3] = strlen (r); + strcpy (q, "jklmnopqrst"); + l[4] = strlen (p); + l[5] = strlen (q); + l[6] = strlen (r); + s = strchr (q, '\0'); + strcpy (s, buf); + l[7] = strlen (p); + l[8] = strlen (q); + l[9] = strlen (r); + l[10] = strlen (s); + memcpy (lp, l, sizeof l); +} + +int +main () +{ + char buf[64]; + size_t l[11]; + const char *volatile z = "ABCDEFG"; + memset (buf, '\0', sizeof buf); + fn1 (buf, z, l); + if (memcmp (buf, "abcdejklmnopqrstABCDEFG", 24) != 0) + abort (); + if (l[0] != 7) + abort (); + if (l[1] != 17 || l[2] != 12 || l[3] != 7) + abort (); + if (l[4] != 16 || l[5] != 11 || l[6] != 6) + abort (); + if (l[7] != 23 || l[8] != 18 || l[9] != 13 || l[10] != 7) + abort (); + return 0; +} + +/* { dg-final { scan-tree-dump-times "strlen \\(" 3 "strlen" } } */ +/* avr has BIGGEST_ALIGNMENT 8, allowing fold_builtin_memory_op + to expand the memcpy call at the end of fn1. */ +/* { dg-final { scan-tree-dump-times "memcpy \\(" 7 "strlen" { target { ! avr-*-* } } } } */ +/* { dg-final { scan-tree-dump-times "memcpy \\(" 6 "strlen" { target { avr-*-* } } } } */ +/* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen" } } */ +/* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen" } } */ +/* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen" } } */ +/* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen" } } */ +/* Where the memcpy is expanded, the assignemts to elements of l are + propagated. */ +/* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;\[\n\r\]* l.0. = " 1 "strlen" { target { ! avr-*-* } } } } */ +/* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;\[\n\r\]* l.6. = " 1 "strlen" { target { ! avr-*-* } } } } */ +/* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;\[\n\r\]* l.9. = " 1 "strlen" { target { ! avr-*-* } } } } */ +/* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;" 3 "strlen" { target { avr-*-* } } } } */