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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100874 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index dd8ab431f34433d48a6396d461c1e040d44ae46f..24825bf5e565a434754a91732b68a5d174516c65 100644 (file)
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -705,7 +705,8 @@ Value *SCEVExpander::visitAddExpr(const SCEVAddExpr *S) {
       Sum = expandAddToGEP(NewOps.begin(), NewOps.end(), PTy, Ty, Sum);
     } else if (const PointerType *PTy = dyn_cast<PointerType>(Op->getType())) {
       // The running sum is an integer, and there's a pointer at this level.
-      // Try to form a getelementptr.
+      // Try to form a getelementptr. Use a SCEVUnknown so that we don't
+      // re-analyze the instructions that we just emitted.
       SmallVector<const SCEV *, 4> NewOps;
       NewOps.push_back(SE.getUnknown(Sum));
       for (++I; I != E && I->first == CurLoop; ++I)