commit 127563b216eadf756e03f0adf2c3900bf244b504
author Benjamin Kramer <benny.kra@googlemail.com> Wed May 30 18:42:43 2012 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Wed May 30 18:42:43 2012 +0000
tree f0f7b4c7de9f140004fa626befb537a8ded3a587
parent 6c823822cdab902e8ecc52603f9c24a0e4b95d42

Make sure that we're dealing with a binary SCEVExpr when simplifying.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157704 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ScalarEvolution.cpp

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index c45cc8d..b49c65f 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -5654,7 +5654,8 @@
       if (!RA)
         if (const SCEVAddExpr *AE = dyn_cast<SCEVAddExpr>(LHS))
           if (const SCEVMulExpr *ME = dyn_cast<SCEVMulExpr>(AE->getOperand(0)))
-            if (ME->getOperand(0)->isAllOnesValue()) {
+            if (AE->getNumOperands() == 2 && ME->getNumOperands() == 2 &&
+                ME->getOperand(0)->isAllOnesValue()) {
               RHS = AE->getOperand(1);
               LHS = ME->getOperand(1);
               Changed = true;