From: Akira Hatanaka <ahatanaka@mips.com>
Date: Sat, 2 Jun 2012 01:10:34 +0000 (+0000)
Subject: Fix a bug in the code which custom-lowers truncating stores in LegalizeDAG.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=55a105160dc02a0d990a69820cfe63fef504195e;p=oota-llvm.git

Fix a bug in the code which custom-lowers truncating stores in LegalizeDAG.

Check that the SDValue TargetLowering::LowerOperation returns is not null
before replacing the original node with the returned node.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157873 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 7ba74425279..c2972b051f7 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1312,8 +1312,9 @@ void SelectionDAGLegalize::LegalizeOp(SDNode *Node) {
           }
           break;
         case TargetLowering::Custom:
-          ReplaceNode(SDValue(Node, 0),
-                      TLI.LowerOperation(SDValue(Node, 0), DAG));
+          Tmp1 = TLI.LowerOperation(SDValue(Node, 0), DAG);
+          if (Tmp1.getNode())
+            ReplaceNode(SDValue(Node, 0), Tmp1);
           break;
         case TargetLowering::Expand:
           assert(!StVT.isVector() &&