[llvm] r316709 - [SimplifyIndVars] Shorten code by using SCEV helper [NFC]

[Philip Reames via llvm-commits]

Author: reames
Date: Thu Oct 26 15:02:16 2017
New Revision: 316709

URL: http://llvm.org/viewvc/llvm-project?rev=316709&view=rev
Log:
[SimplifyIndVars] Shorten code by using SCEV helper [NFC]


Modified:
    llvm/trunk/lib/Transforms/Utils/SimplifyIndVar.cpp

Modified: llvm/trunk/lib/Transforms/Utils/SimplifyIndVar.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SimplifyIndVar.cpp?rev=316709&r1=316708&r2=316709&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/SimplifyIndVar.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/SimplifyIndVar.cpp Thu Oct 26 15:02:16 2017
@@ -174,14 +174,11 @@ void SimplifyIndvar::eliminateIVComparis
     Pred = ICmpInst::getSwappedPredicate(Pred);
   }
 
-  // Get the SCEVs for the ICmp operands.
-  const SCEV *S = SE->getSCEV(ICmp->getOperand(IVOperIdx));
-  const SCEV *X = SE->getSCEV(ICmp->getOperand(1 - IVOperIdx));
-
-  // Simplify unnecessary loops away.
+  // Get the SCEVs for the ICmp operands (in the specific context of the
+  // current loop)
   const Loop *ICmpLoop = LI->getLoopFor(ICmp->getParent());
-  S = SE->getSCEVAtScope(S, ICmpLoop);
-  X = SE->getSCEVAtScope(X, ICmpLoop);
+  const SCEV *S = SE->getSCEVAtScope(ICmp->getOperand(IVOperIdx), ICmpLoop);
+  const SCEV *X = SE->getSCEVAtScope(ICmp->getOperand(1 - IVOperIdx), ICmpLoop);
 
   ICmpInst::Predicate InvariantPredicate;
   const SCEV *InvariantLHS, *InvariantRHS;