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689 |
jeremybenn |
/* This test needs runtime that provides stpcpy and mempcpy functions. */
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/* { dg-do run { target *-*-linux* } } */
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/* { dg-options "-O2 -fdump-tree-strlen" } */
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#define USE_GNU
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#include "strlenopt.h"
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__attribute__((noinline, noclone)) char *
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fn1 (char *p, size_t *l1, size_t *l2)
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{
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char *a = mempcpy (p, "abcde", 6);
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/* This strlen needs to stay. */
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size_t la = strlen (a);
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/* This strlen can be optimized into 5. */
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size_t lp = strlen (p);
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*l1 = la;
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*l2 = lp;
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return a;
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}
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__attribute__((noinline, noclone)) char *
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fn2 (char *p, const char *q, size_t *l1, size_t *l2, size_t *l3)
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{
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/* This strlen needs to stay. */
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size_t lq = strlen (q);
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char *a = mempcpy (p, q, lq + 1);
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/* This strlen needs to stay. */
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size_t la = strlen (a);
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/* This strlen can be optimized into lq. */
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size_t lp = strlen (p);
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*l1 = lq;
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*l2 = la;
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*l3 = lp;
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return a;
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}
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__attribute__((noinline, noclone)) char *
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fn3 (char *p, size_t *l1, size_t *l2)
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{
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char *a = stpcpy (p, "abcde");
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/* This strlen can be optimized into 0. */
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size_t la = strlen (a);
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/* This strlen can be optimized into 5. */
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size_t lp = strlen (p);
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*l1 = la;
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*l2 = lp;
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return a;
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}
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__attribute__((noinline, noclone)) char *
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fn4 (char *p, const char *q, size_t *l1, size_t *l2, size_t *l3)
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{
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/* This strlen needs to stay. */
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size_t lq = strlen (q);
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char *a = stpcpy (p, q);
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/* This strlen can be optimized into 0. */
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size_t la = strlen (a);
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/* This strlen can be optimized into lq. */
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size_t lp = strlen (p);
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*l1 = lq;
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*l2 = la;
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*l3 = lp;
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return a;
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}
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__attribute__((noinline, noclone)) char *
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fn5 (char *p, const char *q, size_t *l1, size_t *l2)
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{
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char *a = stpcpy (p, q);
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/* This strlen can be optimized into 0. */
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size_t la = strlen (a);
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/* This strlen can be optimized into a - p. */
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size_t lp = strlen (p);
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*l1 = la;
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*l2 = lp;
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return a;
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}
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int
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main ()
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{
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char buf[64];
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const char *volatile q = "ABCDEFGH";
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size_t l1, l2, l3;
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memset (buf, '\0', sizeof buf);
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memset (buf + 6, 'z', 7);
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if (fn1 (buf, &l1, &l2) != buf + 6 || l1 != 7 || l2 != 5
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|| memcmp (buf, "abcde\0zzzzzzz", 14) != 0)
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abort ();
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if (fn2 (buf, q, &l1, &l2, &l3) != buf + 9 || l1 != 8 || l2 != 4 || l3 != 8
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|| memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0)
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abort ();
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if (fn3 (buf, &l1, &l2) != buf + 5 || l1 != 0 || l2 != 5
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|| memcmp (buf, "abcde\0GH\0zzzz", 14) != 0)
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abort ();
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l3 = 0;
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memset (buf, 'n', 9);
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if (fn4 (buf, q, &l1, &l2, &l3) != buf + 8 || l1 != 8 || l2 != 0 || l3 != 8
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|| memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0)
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abort ();
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memset (buf, 'm', 9);
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if (fn5 (buf, q, &l1, &l2) != buf + 8 || l1 != 0 || l2 != 8
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|| memcmp (buf, "ABCDEFGH\0zzzz", 14) != 0)
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abort ();
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return 0;
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}
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/* { dg-final { scan-tree-dump-times "strlen \\(" 4 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "memcpy \\(" 1 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "mempcpy \\(" 2 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen" } } */
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/* { dg-final { scan-tree-dump-times "stpcpy \\(" 2 "strlen" } } */
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/* { dg-final { cleanup-tree-dump "strlen" } } */
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