Viewing file:  ldist-strlen-2.c (1000 B) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-details" } */
/* { dg-final { scan-tree-dump-times "generated strlenQI\n" 3 "ldist" } } */
#include <assert.h>
typedef __SIZE_TYPE__ size_t;
extern void* malloc (size_t);
extern void* memset (void*, int, size_t);
__attribute__((noinline))
int test_pos (char *s)
{
int i;
for (i=42; s[i]; ++i);
return i;
}
__attribute__((noinline))
int test_neg (char *s)
{
int i;
for (i=-42; s[i]; ++i);
return i;
}
__attribute__((noinline))
int test_including_null_char (char *s)
{
int i;
for (i=1; s[i-1]; ++i);
return i;
}
int main(void)
{
void *p = malloc (1024);
assert (p);
memset (p, 0xf, 1024);
char *s = (char *)p + 100;
s[42+13] = 0;
assert (test_pos (s) == 42+13);
s[42+13] = 0xf;
s[13] = 0;
assert (test_neg (s) == 13);
s[13] = 0xf;
s[-13] = 0;
assert (test_neg (s) == -13);
s[-13] = 0xf;
s[13] = 0;
assert (test_including_null_char (s) == 13+1);
return 0;
}
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