gcc/testsuite/c-c++-common/gomp/pr60823-3.c

   1 /* PR tree-optimization/60823 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fopenmp-simd -fno-strict-aliasing" } */
   4
   5 void bar (char *, double *);
   6
   7 #if __SIZEOF_DOUBLE__ >= 4
   8
   9 struct S { char c[sizeof (double)]; };
  10 void baz (struct S, struct S);
  11 union U { struct S s; double d; };
  12
  13 #pragma omp declare simd simdlen(4) notinbranch
  14 __attribute__((noinline)) int
  15 foo (double c1, double c2)
  16 {
  17   double *a = &c1;
  18   char *b = (char *) &c1 + 2;
  19
  20   b[-2]++;
  21   b[1]--;
  22   *a++;
  23   c2++;
  24   bar ((char *) &c2 + 1, &c2);
  25   c2 *= 3.0;
  26   bar (b, a);
  27   baz (((union U) { .d = c1 }).s, ((union U) { .d = c2 }).s);
  28   baz (*(struct S *)&c1, *(struct S *)&c2);
  29   return c1 + c2 + ((struct S *)&c1)->c[1];
  30 }
  31
  32 #endif