gnu/dist/gcc4/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -ffinite-math-only -fdump-tree-phiopt1" } */
   3
   4 float repl1 (float varx)
   5 {
   6   if (varx < 0.0)
   7     return 0.0;
   8   else if (varx > 1.0)
   9     return 1.0;
  10   else
  11     return varx;
  12 }
  13
  14 /* Should be turned to
  15
  16    varx_4 = MIN_EXPR <1.0e+0, varx_2>;
  17    varx_5 = MAX_EXPR <varx_4, 0.0>;  */
  18
  19 /* { dg-final { scan-tree-dump "varx.*MIN_EXPR.*1\\.0" "phiopt1"} } */
  20 /* { dg-final { scan-tree-dump "varx.*MAX_EXPR.*0\\.0" "phiopt1"} } */
  21
  22 float repl2 (float vary)
  23 {
  24   if (vary > 1.0)
  25     return 1.0;
  26   else if (vary < 0.0)
  27     return 0.0;
  28   else
  29     return vary;
  30 }
  31
  32 /* Should be turned to
  33
  34    vary_4 = MAX_EXPR <0.0, vary_2>;
  35    vary_5 = MIN_EXPR <vary_4, 1.0e+0>;  */
  36
  37 /* { dg-final { scan-tree-dump "vary.*MAX_EXPR.*0\\.0" "phiopt1"} } */
  38 /* { dg-final { scan-tree-dump "vary.*MIN_EXPR.*1\\.0" "phiopt1"} } */
  39
  40 float repl3 (float varz, float vara, float varb)
  41 {
  42   if (varz > vara)
  43     return vara;
  44   else if (varz < varb)
  45     return varb;
  46   else
  47     return varz;
  48 }
  49
  50 /* Should be turned to
  51
  52   if (varz_2 > vara_3) goto <L4>; else goto <L1>;
  53
  54 <L1>:;
  55   vara_6 = MAX_EXPR <varb_5, varz_2>;  */
  56
  57 /* { dg-final { scan-tree-dump "if .*varz" "phiopt1"} } */
  58 /* { dg-final { scan-tree-dump "vara.*MAX_EXPR" "phiopt1"} } */
  59 /* { dg-final { cleanup-tree-dump "phiopt1" } } */