Viewing file:  strlenopt-30.c (1.1 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-strlen" } */
__attribute__((no_icf))
_Bool f1(char *s)
{
return __builtin_strstr (s, "hello") == s;
}
__attribute__((no_icf))
_Bool f2(char *s)
{
return s == __builtin_strstr (s, "hello");
}
__attribute__((no_icf))
_Bool f3(char *s)
{
return s != __builtin_strstr (s, "hello");
}
__attribute__((no_icf))
_Bool f4()
{
char *foo_f4(void);
char *t1 = foo_f4();
char *t2 = __builtin_strstr (t1, "hello");
_Bool t3 = t2 == t1;
return t3;
}
__attribute__((no_icf))
void f5(char *s)
{
char *t1 = __builtin_strstr (s, "hello");
void foo_f5(void);
if (t1 != s)
foo_f5();
}
/* Do not perform transform, since strlen (t)
is unknown. */
__attribute__((no_icf))
_Bool f6(char *s, char *t)
{
return __builtin_strstr (s, t) == s;
}
/* Do not perform transform in this case, since
t1 doesn't have single use. */
__attribute__((no_icf))
_Bool f7(char *s)
{
void foo_f7(char *);
char *t1 = __builtin_strstr (s, "hello");
foo_f7 (t1);
return (t1 == s);
}
/* { dg-final { scan-tree-dump-times "__builtin_strncmp" 5 "strlen1" } } */
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