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| author | Jakub Jelinek <jakub@redhat.com> | 2023-01-16 09:41:38 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2023-01-16 09:41:38 +0100 |
| commit | 6b0907b4fc455377e5f8109f427d97da02b6aec9 (patch) | |
| tree | 5bdca3578eb0c84e0883b52d17d7d757c69dca3d /gcc/config/i386/emmintrin.h | |
| parent | 98b41fd4045b7856e7b85dd58d67c600bd909379 (diff) | |
| download | gcc-6b0907b4fc455377e5f8109f427d97da02b6aec9.zip gcc-6b0907b4fc455377e5f8109f427d97da02b6aec9.tar.gz gcc-6b0907b4fc455377e5f8109f427d97da02b6aec9.tar.bz2 | |
x86: Avoid -Wuninitialized warnings on _mm*_undefined_* in C++ [PR105593]
In https://gcc.gnu.org/pipermail/gcc-patches/2023-January/609844.html
I've posted a patch to allow ignoring -Winit-self using GCC diagnostic
pragmas, such that one can mark self-initialization as intentional
disabling of -Wuninitialized warnings.
The following incremental patch uses that in the x86 intrinsic
headers.
2023-01-16 Jakub Jelinek <jakub@redhat.com>
PR c++/105593
gcc/
* config/i386/xmmintrin.h (_mm_undefined_ps): Temporarily
disable -Winit-self using pragma GCC diagnostic ignored.
* config/i386/emmintrin.h (_mm_undefined_pd, _mm_undefined_si128):
Likewise.
* config/i386/avxintrin.h (_mm256_undefined_pd, _mm256_undefined_ps,
_mm256_undefined_si256): Likewise.
* config/i386/avx512fintrin.h (_mm512_undefined_pd,
_mm512_undefined_ps, _mm512_undefined_epi32): Likewise.
* config/i386/avx512fp16intrin.h (_mm_undefined_ph,
_mm256_undefined_ph, _mm512_undefined_ph): Likewise.
gcc/testsuite/
* g++.target/i386/pr105593.C: New test.
Diffstat (limited to 'gcc/config/i386/emmintrin.h')
| -rw-r--r-- | gcc/config/i386/emmintrin.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/config/i386/emmintrin.h b/gcc/config/i386/emmintrin.h index 654a8e8..069b1a1 100644 --- a/gcc/config/i386/emmintrin.h +++ b/gcc/config/i386/emmintrin.h @@ -99,7 +99,10 @@ _mm_setr_pd (double __W, double __X) extern __inline __m128d __attribute__((__gnu_inline__, __always_inline__, __artificial__)) _mm_undefined_pd (void) { +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Winit-self" __m128d __Y = __Y; +#pragma GCC diagnostic pop return __Y; } @@ -785,7 +788,10 @@ _mm_move_epi64 (__m128i __A) extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__)) _mm_undefined_si128 (void) { +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Winit-self" __m128i __Y = __Y; +#pragma GCC diagnostic pop return __Y; } |