gcc/testsuite/gcc.dg/loop-unswitch-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-details" } */
   3
   4 void foo (float **a, float **b, float *c, int n, int m, int l)
   5 {
   6   int i,j,k;
   7   float s;
   8   for (i=0; i<l; i++)
   9     for (j=0; j<n; j++)
  10       for (k=0; k<m; k++)
  11         c[i] += a[i][k] * b[k][j];
  12 }
  13
  14 /* { dg-final { scan-tree-dump-times "guard hoisted" 3 "unswitch" } } */
  15 /* { dg-final { scan-tree-dump-not "Invalid sum" "unswitch" } } */
  16