Split -enable-finite-only-fp-math to two options:

-enable-no-nans-fp-math and -enable-no-infs-fp-math. All of the current codegen fp math optimizations only care whether the fp arithmetics arguments and results can never be NaN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108465 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -2236,7 +2236,7 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, unsigned Depth) const{
 
 bool SelectionDAG::isKnownNeverNaN(SDValue Op) const {
   // If we're told that NaNs won't happen, assume they won't.
-  if (FiniteOnlyFPMath())
+  if (NoNaNsFPMath)
     return true;
 
   // If the value is a constant, we can obviously see if it is a NaN or not.