gcc/testsuite/gcc.dg/tree-ssa/loadpre14.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3 typedef int type[2];
   4 int foo(type *a, int argc)
   5 {
   6   type c = {0, 1};
   7   int d, e;
   8
   9   /* Should be able to eliminate the second load of *a along the main path. */
  10   d = (*a)[0];
  11   if (argc)
  12     {
  13       a = &c;
  14     }
  15   e = (*a)[0];
  16   return d + e;
  17 }
  18 /* { dg-final { scan-tree-dump-times "Eliminated: 1" 1 "pre"} } */
  19 /* { dg-final { cleanup-tree-dump "pre" } } */