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/* PR tree-optimization/93213 - wrong code on a multibyte store with
-Og -foptimize-strlen
{ dg-require-effective-target int128 }
{ dg-additional-options "-Og -foptimize-strlen" } */
typedef unsigned __INT16_TYPE__ u16;
typedef unsigned __INT32_TYPE__ u32;
typedef unsigned __int128 u128;
static inline u128
foo (u16 u16_1, u32 u32_1, u128 u128_1)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
u128 u128_0 = 0;
u128_1 -= __builtin_mul_overflow (u32_1, u16_1, &u32_1);
__builtin_memmove (&u16_1, &u128_0, 2);
__builtin_memmove (&u16_1, &u128_1, 1);
return u16_1;
#else
return 0xff;
#endif
}
__attribute__ ((noipa)) void
bar (void)
{
char a[] = { 1, 2 };
const char b[] = { 0, 0 };
const char c[] = { 2 };
__builtin_memcpy (a, b, 2);
// The above is transformed into
// MEM <short unsigned int> [(char * {ref-all})&a] = 0;
// which was then dropped because of the non-nul store below.
__builtin_memcpy (a, c, 1);
volatile char *p = a;
if (p[0] != 2 || p[1] != 0)
__builtin_abort ();
}
int
main (void)
{
u16 x = foo (-1, -1, 0);
if (x != 0xff)
__builtin_abort ();
bar ();
return 0;
}
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