gcc/testsuite/gcc.dg/tree-ssa/loadpre10.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3 struct tree_common
   4 {
   5   int code;
   6 };
   7 union tree_node
   8 {
   9   struct tree_common common;
  10 };
  11 typedef union tree_node *tree;
  12
  13 extern tree test (tree, int, int);
  14 extern tree foo (void);
  15 extern void abort (void) __attribute__ ((__noreturn__));
  16
  17 /* Redundant loads of expr->common.code */
  18 tree
  19 test (tree expr, int t, int D17630)
  20 {
  21   int __i;
  22
  23 L0:
  24   if (expr->common.code != 142) goto L23; else goto L2;
  25
  26 L2:
  27   __i = 0;
  28   goto L10;
  29
  30 L10:
  31   __i = __i + 1;
  32   if (D17630 != __i) goto L8; else goto L19;
  33
  34 L8:
  35   if (t) goto L15; else goto L10;
  36
  37 L15:
  38   expr = foo ();
  39   if (expr->common.code != 142) goto L23; else goto L0;
  40
  41 L19:
  42   abort ();
  43
  44 L23:
  45   return expr;
  46 }
  47 /* { dg-final { scan-tree-dump-times "Eliminated: 1" 1 "pre"} } */
  48 /* { dg-final { cleanup-tree-dump "pre" } } */
  49