Handle constants without going through SCEV.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186593 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Vectorize/SLPVectorizer.cpp b/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 3629eeec173909b9d78d1292af39c47ee484397a..f1da774ede536a0314ef924379af21e6c82bdb90 100644 (file)
--- a/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -1033,6 +1033,12 @@ bool BoUpSLP::isConsecutiveAccess(Value *A, Value *B) {
   if (GepA && GepA->getPointerOperand() == PtrB)
     return false;
 
   if (GepA && GepA->getPointerOperand() == PtrB)
     return false;
 

+  ConstantInt *CA = dyn_cast<ConstantInt>(PtrA);
+  ConstantInt *CB = dyn_cast<ConstantInt>(PtrB);
+  if (CA && CB) {
+    return (CA->getSExtValue() + Sz == CB->getSExtValue());
+  }
+

   // Calculate the distance.
   const SCEV *PtrSCEVA = SE->getSCEV(PtrA);
   const SCEV *PtrSCEVB = SE->getSCEV(PtrB);
   // Calculate the distance.
   const SCEV *PtrSCEVA = SE->getSCEV(PtrA);
   const SCEV *PtrSCEVB = SE->getSCEV(PtrB);