Viewing file:  strlenopt-79.c (1.19 KB) -rw-r--r--
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/* PR tree-optimization/91914 - Invalid strlen folding for offset into struct
{ dg-do run }
{ dg-options "-O2 -Wall" } */
#define assert(expr) \
((expr) \
? (void)0 \
: (__builtin_printf ("%s:%i: assertion failed: %s\n", \
__FILE__, __LINE__, #expr), \
__builtin_abort ()))
extern __SIZE_TYPE__ strlen (const char*);
struct stringpool_t
{
char s1[sizeof ("1")];
char s2[sizeof ("12")];
char s3[sizeof ("123")];
char s4[sizeof ("1234")];
char s5[sizeof ("12345")];
};
static const struct stringpool_t stringpool_contents =
{
"1", "12", "123", "1234", "12345"
};
#define stringpool ((const char *) &stringpool_contents)
volatile int i0 = 0, i2 = 2, i5 = 5, i9 = 9, i14 = 14;
int main (void)
{
/* These shouldn't trigger warnings. */
assert (strlen (stringpool) == 1);
assert (strlen (stringpool + 2) == 2);
assert (strlen (stringpool + 5) == 3);
assert (strlen (stringpool + 9) == 4);
assert (strlen (stringpool + 14) == 5);
assert (strlen (stringpool + i0) == 1);
assert (strlen (stringpool + i2) == 2);
assert (strlen (stringpool + i5) == 3);
assert (strlen (stringpool + i9) == 4);
assert (strlen (stringpool + i14) == 5);
}
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