ValueTracking: modernize isKnownInversion (NFC) (#126234)

llvm/lib/Analysis/ValueTracking.cpp

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 6eba6c0..8a9ad55 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -8599,7 +8599,7 @@
     return false;
 
   // They must both have samesign flag or not.
-  if (cast<ICmpInst>(X)->hasSameSign() != cast<ICmpInst>(Y)->hasSameSign())
+  if (Pred1.hasSameSign() != Pred2.hasSameSign())
     return false;
 
   if (B == C)
@@ -8611,8 +8611,7 @@
     return false;
 
   // Sign bits of two RHSCs should match.
-  if (cast<ICmpInst>(X)->hasSameSign() &&
-      RHSC1->isNonNegative() != RHSC2->isNonNegative())
+  if (Pred1.hasSameSign() && RHSC1->isNonNegative() != RHSC2->isNonNegative())
     return false;
 
   const auto CR1 = ConstantRange::makeExactICmpRegion(Pred1, *RHSC1);