Add a comment and tidy up some whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93932 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index a06321cecfd7d727582ebc02ed7c6a345422031e..7389007bf2f97fe9f968677c6ee38edbccf74985 100644 (file)
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1530,7 +1530,6 @@ const SCEV *ScalarEvolution::getAddExpr(SmallVectorImpl<const SCEV *> &Ops,
   return S;
 }
 
-
 /// getMulExpr - Get a canonical multiply expression, or something simpler if
 /// possible.
 const SCEV *ScalarEvolution::getMulExpr(SmallVectorImpl<const SCEV *> &Ops,
@@ -1558,7 +1557,6 @@ const SCEV *ScalarEvolution::getMulExpr(SmallVectorImpl<const SCEV *> &Ops,
           return getAddExpr(getMulExpr(LHSC, Add->getOperand(0)),
                             getMulExpr(LHSC, Add->getOperand(1)));
 
-
     ++Idx;
     while (const SCEVConstant *RHSC = dyn_cast<SCEVConstant>(Ops[Idx])) {
       // We found two constants, fold them together!
@@ -1877,6 +1875,8 @@ ScalarEvolution::getAddRecExpr(SmallVectorImpl<const SCEV *> &Operands,
     }
   }
 
+  // Okay, it looks like we really DO need an addrec expr.  Check to see if we
+  // already have one, otherwise create a new one.
   FoldingSetNodeID ID;
   ID.AddInteger(scAddRecExpr);
   ID.AddInteger(Operands.size());