gcc/testsuite/gcc.dg/torture/pr50444.c

   1 /* { dg-do run { target i?86-*-* x86_64-*-* } } */
   2 /* { dg-options "-msse2" } */
   3 /* { dg-require-effective-target sse2_runtime } */
   4
   5 typedef long long __m128i __attribute__ ((__vector_size__ (16),
   6 __may_alias__));
   7 typedef int __v4si __attribute__ ((__vector_size__ (16)));
   8 typedef long long __v2di __attribute__ ((__vector_size__ (16)));
   9 typedef unsigned int uint32_t;
  10
  11 typedef struct {
  12     uint32_t v[4];
  13 } a4x32;
  14
  15 a4x32* incr(a4x32* x)
  16 {
  17   x->v[0] += 1;
  18   return x;
  19 }
  20
  21 typedef struct {
  22     __m128i m;
  23 } a1xm128i;
  24
  25 static inline  a1xm128i ssefunc( a1xm128i in,  a1xm128i k)
  26 {
  27   a1xm128i ret;
  28   ret.m = (__m128i)__builtin_ia32_pxor128 ((__v2di)in.m, (__v2di)k.m);
  29   return ret;
  30 }
  31
  32 static  a4x32  caster( a4x32 c4x32,  a1xm128i k)
  33 {
  34   a1xm128i c1x128;
  35   if( sizeof(c4x32) != sizeof(c1x128) ) __builtin_abort();
  36   __builtin_memcpy(&c1x128, &c4x32, sizeof(c1x128));
  37   c1x128 = ssefunc(c1x128, k);
  38   __builtin_memcpy(&c4x32, &c1x128, sizeof(c4x32));
  39   return c4x32;
  40 }
  41
  42 typedef struct  {
  43     a1xm128i key;
  44     a4x32 c;
  45     __SIZE_TYPE__ elem;
  46     a4x32 v;
  47 } Engine;
  48
  49 void ctor(Engine *e)
  50 {
  51   e->elem = 0;
  52   e->key.m = (__m128i)(__v4si){ 0, 0, 0, 0 };
  53   e->c.v[0] = 0;
  54   e->c.v[1] = 0;
  55   e->c.v[2] = 0;
  56   e->c.v[3] = 0;
  57 }
  58
  59 uint32_t method( Engine *e)
  60 {
  61   if( e->elem == 0 )
  62     {
  63       e->v = caster(*incr(&e->c), e->key);
  64       e->elem = 4;
  65     }
  66   return e->v.v[--e->elem];
  67 }
  68
  69 int main()
  70 {
  71   Engine e4; ctor(&e4);
  72   Engine e5; ctor(&e5);
  73   if(method(&e4)!=method(&e5))
  74     __builtin_abort ();
  75   return 0;
  76 }