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re PR target/70118 (UBSan claims misaligned access in SSE instrinsics)

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PR target/70118
	* config/i386/mmintrin.h (__m64_u): New type
	* config/i386/emmintrin.h (_mm_loadl_epi64, _mm_storel_epi64):
	Make the allowed unaligned memory access explicit.

From-SVN: r243527
This commit is contained in:
Allan Sandfeld Jensen 2016-12-11 22:27:08 +06:00 committed by Uros Bizjak
parent 846fbd1e2b
commit 865fc96846
3 changed files with 14 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-12-10 Allan Sandfeld Jensen <allan.jensen@qt.io>
PR target/70118
* config/i386/mmintrin.h (__m64_u): New type
* config/i386/emmintrin.h (_mm_loadl_epi64, _mm_storel_epi64):
Make the allowed unaligned memory access explicit.
2016-12-10 Krister Walfridsson <krister.walfridsson@gmail.com>
* config.gcc (i386-*-netbsd*): Make i486 the default arch on NetBSD.

8
gcc/config/i386/emmintrin.h
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@ -703,9 +703,9 @@ _mm_loadu_si128 (__m128i_u const *__P)
}
extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_loadl_epi64 (__m128i const *__P)
_mm_loadl_epi64 (__m128i_u const *__P)
{
return _mm_set_epi64 ((__m64)0LL, *(__m64 *)__P);
return _mm_set_epi64 ((__m64)0LL, *(__m64_u *)__P);
}
extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
@ -721,9 +721,9 @@ _mm_storeu_si128 (__m128i_u *__P, __m128i __B)
}
extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_storel_epi64 (__m128i *__P, __m128i __B)
_mm_storel_epi64 (__m128i_u *__P, __m128i __B)
{
*(long long *)__P = ((__v2di)__B)[0];
*(__m64_u *)__P = (__m64) ((__v2di)__B)[0];
}
extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))

3
gcc/config/i386/mmintrin.h
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@ -37,6 +37,9 @@
vector types, and their scalar components. */
typedef int __m64 __attribute__ ((__vector_size__ (8), __may_alias__));
/* Unaligned version of the same type */
typedef int __m64_u __attribute__ ((__vector_size__ (8), __may_alias__, __aligned__ (1)));
/* Internal data types for implementing the intrinsics. */
typedef int __v2si __attribute__ ((__vector_size__ (8)));
typedef short __v4hi __attribute__ ((__vector_size__ (8)));