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/* PR tree-optimization/90662 - strlen of a string in a vla plus offset
not folded
Verify that strlen of pointers to wide character arrays (emulated
by int16_t) are computed correctly (whether folded or not).
{ dg-do run }
{ dg-options "-O2 -Wall -Wno-incompatible-pointer-types" } */
#include "strlenopt.h"
typedef __INT16_TYPE__ int16_t;
#define A(expr) \
((expr) \
? (void)0 \
: (__builtin_printf ("assertion failed on line %i: %s\n", \
__LINE__, #expr), \
__builtin_abort ()))
typedef int16_t A5[5];
A5 a5[5];
A5* p[5] = { &a5[4], &a5[3], &a5[2], &a5[1], &a5[0] };
__attribute__ ((noclone, noinline, noipa))
void deref_deref (void)
{
strcpy (**p, "12345");
A (strlen (**p) == 5);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_0 (void)
{
strcpy (*p[0], "");
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_1 (void)
{
strcpy (*p[1], "12");
A (strlen (*p[1]) == 2);
A (strlen (&(*p[1])[1]) == 0);
A (strlen ((char*)*p[1] + 1) == 1);
A (strlen ((char*)*p[1] + 2) == 0);
A (strlen ((char*)*p[1] + 3) == 0);
A (strlen ((char*)&(*p[1])[1] + 1) == 0);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_2 (void)
{
strcpy (*p[2], "1234");
A (strlen (*p[2]) == 4);
A (strlen (&(*p[2])[1]) == 2);
A (strlen (&(*p[2])[2]) == 0);
A (strlen ((char*)*p[2] + 1) == 3);
A (strlen ((char*)*p[2] + 2) == 2);
A (strlen ((char*)*p[2] + 3) == 1);
A (strlen ((char*)*p[2] + 4) == 0);
A (strlen ((char*)*p[2] + 5) == 0);
A (strlen ((char*)&(*p[2])[1] + 1) == 1);
A (strlen ((char*)&(*p[2])[1] + 2) == 0);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_3 (void)
{
strcpy (*p[3], "123456");
A (strlen (*p[3]) == 6);
A (strlen (&(*p[3])[1]) == 4);
A (strlen (&(*p[3])[2]) == 2);
A (strlen (&(*p[3])[3]) == 0);
A (strlen ((char*)*p[3] + 1) == 5);
A (strlen ((char*)*p[3] + 2) == 4);
A (strlen ((char*)*p[3] + 3) == 3);
A (strlen ((char*)*p[3] + 4) == 2);
A (strlen ((char*)*p[3] + 5) == 1);
A (strlen ((char*)*p[3] + 6) == 0);
A (strlen (*p[2]) == 4);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_4 (void)
{
strcpy (*p[4], "12345678");
A (strlen (*p[4]) == 8);
A (strlen (&(*p[4])[1]) == 6);
A (strlen (&(*p[4])[2]) == 4);
A (strlen (&(*p[4])[3]) == 2);
A (strlen (&(*p[4])[4]) == 0);
A (strlen (*p[3]) == 6);
A (strlen (*p[2]) == 4);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_4_x (void)
{
strcpy (*p[4], "");
A (strlen (*p[4]) == 0);
A (strlen (*p[3]) == 6);
A (strlen (*p[2]) == 4);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_3_x (void)
{
strcpy (&(*p[3])[0], "1");
A (strlen (*p[4]) == 0);
A (strlen (*p[3]) == 1);
A (strlen (*p[2]) == 4);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_2_x (void)
{
strcpy (*p[2], "12");
A (strlen (*p[4]) == 0);
A (strlen (*p[3]) == 1);
A (strlen (*p[2]) == 2);
A (strlen (*p[1]) == 2);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_1_x (void)
{
strcpy (*p[1], "123");
A (strlen (*p[4]) == 0);
A (strlen (*p[3]) == 1);
A (strlen (*p[2]) == 2);
A (strlen (*p[1]) == 3);
A (strlen (*p[0]) == 0);
}
__attribute__ ((noclone, noinline, noipa))
void deref_idx_0_x (void)
{
strcpy (*p[0], "1234");
A (strlen (*p[4]) == 0);
A (strlen (*p[3]) == 1);
A (strlen (*p[2]) == 2);
A (strlen (*p[1]) == 3);
A (strlen (*p[0]) == 4);
}
int main (void)
{
deref_deref ();
deref_idx_0 ();
deref_idx_1 ();
deref_idx_2 ();
deref_idx_3 ();
deref_idx_4 ();
deref_idx_4_x ();
deref_idx_3_x ();
deref_idx_2_x ();
deref_idx_1_x ();
deref_idx_0_x ();
}
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