gcc/testsuite/gcc.dg/vect/bb-slp-pr114435.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_double } */
   3 /* Predictive commining is supposed to happen.  */
   4 /* { dg-additional-options "-O3 -fdump-tree-pcom" } */
   5
   6 struct res {
   7     double r0;
   8     double r1;
   9     double r2;
  10     double r3;
  11 };
  12
  13 struct pxl {
  14     double v0;
  15     double v1;
  16     double v2;
  17     double v3;
  18 };
  19
  20 #define IS_NAN(x) ((x) == (x))
  21
  22 void fold(struct res *r, struct pxl *in, double k, int sz)
  23 {
  24   int i;
  25
  26   for (i = 0; i < sz; i++) {
  27       if (IS_NAN(k)) continue;
  28       r->r0 += in[i].v0 * k;
  29       r->r1 += in[i].v1 * k;
  30       r->r2 += in[i].v2 * k;
  31       r->r3 += in[i].v3 * k;
  32   }
  33 }
  34
  35 /* { dg-final { scan-tree-dump "# r__r0_lsm\[^\r\n\]* = PHI" "pcom" } } */
  36 /* { dg-final { scan-tree-dump "optimized: basic block part vectorized" "slp1" } } */
  37 /* { dg-final { scan-tree-dump "# vect\[^\r\n\]* = PHI" "slp1" } } */