gcc/testsuite/gcc.dg/tree-ssa/phi-opt-36.c

   1 /* { dg-options "-O2 -fdump-tree-phiopt" } */
   2
   3 unsigned f0(int A)
   4 {
   5   unsigned t = A;
   6 //     A == 0? A : -A    same as -A
   7   if (A == 0)  return t;
   8   return -t;
   9 }
  10
  11 unsigned f1(int A)
  12 {
  13   unsigned t = A;
  14 //     A != 0? A : -A    same as A
  15   if (A != 0)  return t;
  16   return -t;
  17 }
  18 unsigned f2(int A)
  19 {
  20   unsigned t = A;
  21 //     A >= 0? A : -A    same as abs (A)
  22   if (A >= 0)  return t;
  23   return -t;
  24 }
  25 unsigned f3(int A)
  26 {
  27   unsigned t = A;
  28 //     A > 0?  A : -A    same as abs (A)
  29   if (A > 0)  return t;
  30   return -t;
  31 }
  32 unsigned f4(int A)
  33 {
  34   unsigned t = A;
  35 //     A <= 0? A : -A    same as -abs (A)
  36   if (A <= 0)  return t;
  37   return -t;
  38 }
  39 unsigned f5(int A)
  40 {
  41   unsigned t = A;
  42 //     A < 0?  A : -A    same as -abs (A)
  43   if (A < 0)  return t;
  44   return -t;
  45 }
  46
  47 /* f4 and f5 are not allowed to be optimized in early phi-opt. */
  48 /* { dg-final { scan-tree-dump-times "if " 2 "phiopt1" } } */
  49 /* { dg-final { scan-tree-dump-not "if " "phiopt2" } } */
  50
  51