From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Fri, 25 Sep 2015 22:06:19 +0000 (+0000)
Subject: DAGCombiner: Check if store is volatile first
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=476be375a152bcdd67acd61d590aeef87449d548;p=oota-llvm.git

DAGCombiner: Check if store is volatile first

This is the simpler check. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248625 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 01ca2884d03..f94f506156c 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -14519,6 +14519,9 @@ bool DAGCombiner::findBetterNeighborChains(StoreSDNode* St) {
     if (Index != St && !SDValue(Index, 0)->hasOneUse())
       break;
 
+    if (Index->isVolatile() || Index->isIndexed())
+      break;
+
     // Find the base pointer and offset for this memory node.
     BaseIndexOffset Ptr = BaseIndexOffset::match(Index->getBasePtr());
 
@@ -14526,9 +14529,6 @@ bool DAGCombiner::findBetterNeighborChains(StoreSDNode* St) {
     if (!Ptr.equalBaseIndex(BasePtr))
       break;
 
-    if (Index->isVolatile() || Index->isIndexed())
-      break;
-
     // Find the next memory operand in the chain. If the next operand in the
     // chain is a store then move up and continue the scan with the next
     // memory operand. If the next operand is a load save it and use alias