gcc/testsuite/gcc.dg/tree-ssa/vrp25.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1-details" } */
   3
   4 extern void abort ();
   5 int tree_code_length[100];
   6
   7 blah (int code1)
   8 {
   9   unsigned char D18670;
  10
  11   if (code1 != 53) goto L0; else goto L1;
  12
  13 L0:
  14   abort ();
  15
  16 L1:
  17   D18670 = tree_code_length[53];
  18   if (D18670 <= 1) goto L2; else goto L3;
  19
  20 L2:
  21   abort ();
  22
  23 L3:
  24   if (D18670 == 2) goto L4; else goto L5;
  25
  26 L4:
  27   abort ();
  28
  29 L5:
  30   arf ();
  31   if (code1 != 53) goto L6; else goto L7;
  32
  33 L6:
  34   abort ();
  35
  36 L7:
  37   if (D18670 <= 2) goto L8; else goto L9;
  38
  39 L8:
  40   abort ();
  41
  42 L9:
  43   return;
  44
  45 }
  46
  47 /* The second test of (code1 != 53) and the test (D18670 <= 2) are
  48    both totally subsumed by earlier tests and thus should be folded
  49    away using VRP.  */
  50 /* { dg-final { scan-tree-dump-times "Folding predicate" 2 "vrp1" } } */
  51 /* { dg-final { cleanup-tree-dump "vrp1" } } */
  52