gcc/testsuite/gcc.dg/tree-ssa/phi-opt-24.c

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