From 3affd9e8f366f241adbbc57ef53489ff2052db4f Mon Sep 17 00:00:00 2001 From: Pete Cooper Date: Wed, 20 Jun 2012 19:35:43 +0000 Subject: [PATCH] Add users of a MERGE_VALUE node to the worklist to process again when the node is removed. Sorry, no test case. Foudn it by inspection of the code git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158839 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 4b56e41b72c..95dd2e6219b 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1322,6 +1322,9 @@ SDValue DAGCombiner::visitMERGE_VALUES(SDNode *N) { // Replacing results may cause a different MERGE_VALUES to suddenly // be CSE'd with N, and carry its uses with it. Iterate until no // uses remain, to ensure that the node can be safely deleted. + // First add the users of this node to the work list so that they + // can be tried again once they have new operands. + AddUsersToWorkList(N); do { for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) DAG.ReplaceAllUsesOfValueWith(SDValue(N, i), N->getOperand(i));