[ValueTracking][NFC]: Use injected condition to compute known FPClass (llvm#139832)

Author: hassnaaHamdi

llvm/lib/Analysis/ValueTracking.cpp

@@ -4594,6 +4594,10 @@ static KnownFPClass computeKnownFPClassFromContext(const Value *V,
                                                    const SimplifyQuery &Q) {
   KnownFPClass KnownFromContext;
 
+  if (Q.CC && Q.CC->AffectedValues.contains(V))
+    computeKnownFPClassFromCond(V, Q.CC->Cond, 0, !Q.CC->Invert, Q.CxtI,
+                                KnownFromContext);
+
   if (!Q.CxtI)
     return KnownFromContext;