gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-20.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3
   4 double pcheck;
   5
   6 void foo(int n, int m, int b)
   7 {
   8   int i, j;
   9
  10   goto bb18;
  11
  12 start:
  13   i = 1;
  14   do {
  15     j = 1;
  16     do {
  17       double x = pcheck;
  18       x = x + 1;
  19       pcheck = x;
  20       j = j + 1;
  21     } while (j != m);
  22     i = i + 1;
  23   } while (i != n);
  24
  25 bb18:
  26   pcheck = 0.0;
  27   goto start;
  28 }
  29
  30 /* We should have inserted two PHI nodes and the one in the i-loop
  31    should have 0.0 in the argument coming from the bb18 block.  */
  32
  33 /* { dg-final { scan-tree-dump "New PHIs: 2" "pre" } } */
  34 /* { dg-final { scan-tree-dump "PHI <.*0\\\.0" "pre" } } */
  35 /* { dg-final { cleanup-tree-dump "pre" } } */