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| author | Jakub Jelinek <jakub@redhat.com> | 2021-01-23 09:41:58 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-01-23 09:41:58 +0100 |
| commit | c63f091db89a56ae56b2bfa2ba4d9e956bd9693f (patch) | |
| tree | c25c6d8add37e5841cae1f55c104280bb6c46d7a /gcc | |
| parent | a8cef3cba6945730c69e15dcdad726e74b50fe58 (diff) | |
| download | gcc-c63f091db89a56ae56b2bfa2ba4d9e956bd9693f.zip gcc-c63f091db89a56ae56b2bfa2ba4d9e956bd9693f.tar.gz gcc-c63f091db89a56ae56b2bfa2ba4d9e956bd9693f.tar.bz2 | |
rs6000: Fix up __m64 typedef in mmintrin.h [PR97301]
The x86 __m64 type is defined as:
/* The Intel API is flexible enough that we must allow aliasing with other
vector types, and their scalar components. */
typedef int __m64 __attribute__ ((__vector_size__ (8), __may_alias__));
and so matches the comment above it in that reads and stores through
pointers to __m64 can alias anything.
But in the rs6000 headers that is the case only for __m128, but not __m64.
The following patch adds that attribute, which fixes the
FAIL: gcc.target/powerpc/sse-movhps-1.c execution test
FAIL: gcc.target/powerpc/sse-movlps-1.c execution test
regressions that appeared when Honza improved ipa-modref.
2021-01-23 Jakub Jelinek <jakub@redhat.com>
PR testsuite/97301
* config/rs6000/mmintrin.h (__m64): Add __may_alias__ attribute.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/rs6000/mmintrin.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/config/rs6000/mmintrin.h b/gcc/config/rs6000/mmintrin.h index 60d1a25..0bd929c 100644 --- a/gcc/config/rs6000/mmintrin.h +++ b/gcc/config/rs6000/mmintrin.h @@ -58,7 +58,8 @@ #include <altivec.h> /* The Intel API is flexible enough that we must allow aliasing with other vector types, and their scalar components. */ -typedef __attribute__ ((__aligned__ (8))) unsigned long long __m64; +typedef __attribute__ ((__aligned__ (8), + __may_alias__)) unsigned long long __m64; typedef __attribute__ ((__aligned__ (8))) union |