gcc/testsuite/gcc.dg/tree-ssa/pr106819.c

   1 // { dg-do compile }
   2 // { dg-options "-O2 -fdump-tree-evrp-details" }
   3
   4 static int isNaN(double x)
   5 {
   6     return x != x;
   7 }
   8
   9 static double opCmpProper(int lhs, double rhs)
  10 {
  11   return lhs < rhs ? -1.0
  12        : lhs > rhs ? 1.0
  13        : lhs == rhs ? 0.0
  14        : __builtin_nan("");
  15 }
  16
  17 int main()
  18 {
  19     if (!isNaN(opCmpProper(41, __builtin_nan(""))))
  20       __builtin_abort();
  21     return 0;
  22 }
  23
  24 // { dg-final {scan-tree-dump-not "Folds to: 0.0" "evrp" } }