From aedb1385c2c6dc52794fb2f9c82670263d1cee34 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 28 Nov 2008 22:50:08 +0000
Subject: [PATCH] don't revisit instructions off the beginning of the block.

llvm-svn: 60221
---
 lib/Transforms/Scalar/DeadStoreElimination.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/Transforms/Scalar/DeadStoreElimination.cpp b/lib/Transforms/Scalar/DeadStoreElimination.cpp
index b48bbeae66b..e6a05b7e90b 100644
--- a/lib/Transforms/Scalar/DeadStoreElimination.cpp
+++ b/lib/Transforms/Scalar/DeadStoreElimination.cpp
@@ -132,7 +132,8 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) {
       
       // If we deleted a store, reinvestigate this instruction.
       if (deletedStore) {
-        --BBI;
+        if (!isa<TerminatorInst>(BB.begin()))
+          --BBI;
         continue;
       }
     }
@@ -160,7 +161,8 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) {
              DT.dominates(dep, L))) {
           
           DeleteDeadInstruction(S);
-          --BBI;
+          if (!isa<TerminatorInst>(BB.begin()))
+            --BBI;
           NumFastStores++;
           MadeChange = true;
         } else