1/* { dg-do run } */ 2/* { dg-require-effective-target sse4 } */ 3/* { dg-options "-O2 -msse4.1" } */ 4 5#ifndef CHECK_H 6#define CHECK_H "sse4_1-check.h" 7#endif 8 9#ifndef TEST 10#define TEST sse4_1_test 11#endif 12 13#include CHECK_H 14 15#include <smmintrin.h> 16#include <string.h> 17 18typedef char T __attribute__((may_alias)); 19struct S { __m128i d; }; 20 21__m128i 22__attribute__((noinline)) 23foo (__m128i y, char x) 24{ 25 struct S s; 26 27 s.d = y; 28 ((T *) &s.d)[1] = x; 29 return s.d; 30} 31 32static void 33TEST (void) 34{ 35 union 36 { 37 __m128i x; 38 unsigned int i[4]; 39 unsigned char c[16]; 40 } res, val, tmp; 41 unsigned char ins[4] = { 3, 4, 5, 6 }; 42 43 val.i[0] = 0x35251505; 44 val.i[1] = 0x75655545; 45 val.i[2] = 0xB5A59585; 46 val.i[3] = 0xF5E5D5C5; 47 48 res.x = foo (val.x, ins[3]); 49 50 tmp.x = val.x; 51 tmp.c[1] = ins[3]; 52 if (memcmp (&tmp, &res, sizeof (tmp))) 53 abort (); 54} 55