| /* This test needs runtime that provides stpcpy and mempcpy functions. */ |
| /* { dg-do run { target *-*-linux* } } */ |
| /* { dg-options "-O2 -fdump-tree-strlen" } */ |
| |
| #define USE_GNU |
| #include "strlenopt.h" |
| |
| __attribute__((noinline, noclone)) char * |
| fn1 (char *p, size_t *l1, size_t *l2) |
| { |
| char *a = mempcpy (p, "abcde", 6); |
| /* This strlen needs to stay. */ |
| size_t la = strlen (a); |
| /* This strlen can be optimized into 5. */ |
| size_t lp = strlen (p); |
| *l1 = la; |
| *l2 = lp; |
| return a; |
| } |
| |
| __attribute__((noinline, noclone)) char * |
| fn2 (char *p, const char *q, size_t *l1, size_t *l2, size_t *l3) |
| { |
| /* This strlen needs to stay. */ |
| size_t lq = strlen (q); |
| char *a = mempcpy (p, q, lq + 1); |
| /* This strlen needs to stay. */ |
| size_t la = strlen (a); |
| /* This strlen can be optimized into lq. */ |
| size_t lp = strlen (p); |
| *l1 = lq; |
| *l2 = la; |
| *l3 = lp; |
| return a; |
| } |
| |
| __attribute__((noinline, noclone)) char * |
| fn3 (char *p, size_t *l1, size_t *l2) |
| { |
| char *a = stpcpy (p, "abcde"); |
| /* This strlen can be optimized into 0. */ |
| size_t la = strlen (a); |
| /* This strlen can be optimized into 5. */ |
| size_t lp = strlen (p); |
| *l1 = la; |
| *l2 = lp; |
| return a; |
| } |
| |
| __attribute__((noinline, noclone)) char * |
| fn4 (char *p, const char *q, size_t *l1, size_t *l2, size_t *l3) |
| { |
| /* This strlen needs to stay. */ |
| size_t lq = strlen (q); |
| char *a = stpcpy (p, q); |
| /* This strlen can be optimized into 0. */ |
| size_t la = strlen (a); |
| /* This strlen can be optimized into lq. */ |
| size_t lp = strlen (p); |
| *l1 = lq; |
| *l2 = la; |
| *l3 = lp; |
| return a; |
| } |
| |
| __attribute__((noinline, noclone)) char * |
| fn5 (char *p, const char *q, size_t *l1, size_t *l2) |
| { |
| char *a = stpcpy (p, q); |
| /* This strlen can be optimized into 0. */ |
| size_t la = strlen (a); |
| /* This strlen can be optimized into a - p. */ |
| size_t lp = strlen (p); |
| *l1 = la; |
| *l2 = lp; |
| return a; |
| } |
| |
| int |
| main () |
| { |
| char buf[64]; |
| const char *volatile q = "ABCDEFGH"; |
| size_t l1, l2, l3; |
| memset (buf, '\0', sizeof buf); |
| memset (buf + 6, 'z', 7); |
| if (fn1 (buf, &l1, &l2) != buf + 6 || l1 != 7 || l2 != 5 |
| || memcmp (buf, "abcde\0zzzzzzz", 14) != 0) |
| abort (); |
| if (fn2 (buf, q, &l1, &l2, &l3) != buf + 9 || l1 != 8 || l2 != 4 || l3 != 8 |
| || memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0) |
| abort (); |
| if (fn3 (buf, &l1, &l2) != buf + 5 || l1 != 0 || l2 != 5 |
| || memcmp (buf, "abcde\0GH\0zzzz", 14) != 0) |
| abort (); |
| l3 = 0; |
| memset (buf, 'n', 9); |
| if (fn4 (buf, q, &l1, &l2, &l3) != buf + 8 || l1 != 8 || l2 != 0 || l3 != 8 |
| || memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0) |
| abort (); |
| memset (buf, 'm', 9); |
| if (fn5 (buf, q, &l1, &l2) != buf + 8 || l1 != 0 || l2 != 8 |
| || memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0) |
| abort (); |
| return 0; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "strlen \\(" 4 "strlen" } } */ |
| /* { dg-final { scan-tree-dump-times "memcpy \\(" 1 "strlen" } } */ |
| /* { dg-final { scan-tree-dump-times "mempcpy \\(" 2 "strlen" } } */ |
| /* { 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 \\(" 2 "strlen" } } */ |
| /* { dg-final { cleanup-tree-dump "strlen" } } */ |