gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-34.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-dse1-details" } */
   3
   4 void f(int n, char *p0, char *p1, char *p2, char *o)
   5 {
   6   int t0, t1;
   7   __builtin_memcpy(&t0, p0, 1);
   8   __builtin_memcpy(&t1, p1, 1);
   9   if (n==3)
  10     __builtin_memcpy(o+2, p2, 1);
  11   __builtin_memcpy(o+0, &t0, 1);
  12   __builtin_memcpy(o+1, &t1, 1);
  13 }
  14
  15 /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" } } */