From aa7868594eea6fd43c78e0496573a0c48b1092af Mon Sep 17 00:00:00 2001
From: Michael Zolotukhin <mzolotukhin@apple.com>
Date: Tue, 10 Apr 2018 02:16:29 +0000
Subject: [SSAUpdaterBulk] Handle CFG with unreachable from entry blocks.

llvm-svn: 329660
---
 llvm/lib/Transforms/Utils/SSAUpdaterBulk.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib')

diff --git a/llvm/lib/Transforms/Utils/SSAUpdaterBulk.cpp b/llvm/lib/Transforms/Utils/SSAUpdaterBulk.cpp
index 8f106c57b43..9f358e1d60a 100644
--- a/llvm/lib/Transforms/Utils/SSAUpdaterBulk.cpp
+++ b/llvm/lib/Transforms/Utils/SSAUpdaterBulk.cpp
@@ -57,7 +57,7 @@ bool SSAUpdaterBulk::HasValueForBlock(unsigned Var, BasicBlock *BB) {
 Value *SSAUpdaterBulk::computeValueAt(BasicBlock *BB, RewriteInfo &R,
                                       DominatorTree *DT) {
   if (!R.Defines.count(BB)) {
-    if (PredCache.get(BB).size()) {
+    if (DT->isReachableFromEntry(BB) && PredCache.get(BB).size()) {
       BasicBlock *IDom = DT->getNode(BB)->getIDom()->getBlock();
       R.Defines[BB] = computeValueAt(IDom, R, DT);
     } else
-- 
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