[ValueTracking][NFC]: Use injected condition to compute known FPClass

Author: hassnaaHamdi

llvm/include/llvm/Analysis/SimplifyQuery.h

@@ -63,6 +63,8 @@ struct InstrInfoQuery {
 struct CondContext {
   Value *Cond;
   bool Invert = false;
+  // Condition is true if CxtI is in the true successor of Cond.
+  bool CondIsTrue = false;
   SmallPtrSet<Value *, 4> AffectedValues;
 
   CondContext(Value *Cond) : Cond(Cond) {}