commit 55a105160dc02a0d990a69820cfe63fef504195e
author Akira Hatanaka <ahatanaka@mips.com> Sat Jun 02 01:10:34 2012 +0000
committer Akira Hatanaka <ahatanaka@mips.com> Sat Jun 02 01:10:34 2012 +0000
tree 72db0ebd2b56a53a0d1707a0a2c9b8b6df3bec65
parent 00edc3dea28c158c5e2b6d4fd3d2da13ee933e2a

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

lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 7ba7442..c2972b0 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1312,8 +1312,9 @@
           }
           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() &&