[Bug middle-end/92436] SIMD integer subtract with constant always becomes add

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92436

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|x86, aarch                  |x86, aarch64

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Testcases:
x86:
#include <x86intrin.h>
__m128i fn(__m128i a) {
        return _mm_or_si128(
                _mm_sub_epi8(a, _mm_set1_epi8(99)),
                _mm_set1_epi8(99)
        );
}


aarch64:
#include <arm_neon.h>
uint8x16_t fn(uint8x16_t a) {
        return vorrq_u8(
                vsubq_u8(a, vdupq_n_u8(99)),
                vdupq_n_u8(99)
        );
}

Note aarch64 is a regression from GCC 5.