| /* { 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 "strlen1" } } */ |
| /* 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 "strlen1" { target { ! avr-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times "memcpy \\(" 6 "strlen1" { target { avr-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen1" } } */ |
| /* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen1" } } */ |
| /* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen1" } } */ |
| /* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen1" } } */ |
| /* 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 "strlen1" { target { ! avr-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;\[\n\r\]* l.6. = " 1 "strlen1" { target { ! avr-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;\[\n\r\]* l.9. = " 1 "strlen1" { target { ! avr-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times " _\[0-9\]* = strlen \\(\[^\n\r\]*;" 3 "strlen1" { target { avr-*-* } } } } */ |