From: Craig Topper <craig.topper@gmail.com>
Date: Tue, 20 Mar 2012 05:28:39 +0000 (+0000)
Subject: When combining (vextract shuffle (load ), <1,u,u,u>), 0) -> (load ), add users of... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=0c9da210f703f0cc98f7e198db1b68073091ce25;p=oota-llvm.git

When combining (vextract shuffle (load ), <1,u,u,u>), 0) -> (load ), add users of the final load to the worklist too. Needed by changes I'm preparing to make to X86 backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153078 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 1bd1b95ad7d..7c4db97bfea 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -7353,6 +7353,7 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) {
     // Since we're explcitly calling ReplaceAllUses, add the new node to the
     // worklist explicitly as well.
     AddToWorkList(Load.getNode());
+    AddUsersToWorkList(Load.getNode()); // Add users too
     // Make sure to revisit this node to clean it up; it will usually be dead.
     AddToWorkList(N);
     return SDValue(N, 0);