From 45b07e157c0a22fec8148e0cc7243a029d4a061e Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Fri, 31 Jan 2014 00:51:43 +0000 Subject: [PATCH] DAGCombine should not produce ISD::OR nodes after operation legalization if they're not legal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200503 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index e96a7aaaf08..7dd85a8be74 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1544,8 +1544,10 @@ SDValue DAGCombiner::visitADD(SDNode *N) { // If all possibly-set bits on the LHS are clear on the RHS, return an OR. // If all possibly-set bits on the RHS are clear on the LHS, return an OR. - if ((RHSZero & ~LHSZero) == ~LHSZero || (LHSZero & ~RHSZero) == ~RHSZero) - return DAG.getNode(ISD::OR, SDLoc(N), VT, N0, N1); + if ((RHSZero & ~LHSZero) == ~LHSZero || (LHSZero & ~RHSZero) == ~RHSZero){ + if (!LegalOperations || TLI.isOperationLegal(ISD::OR, VT)) + return DAG.getNode(ISD::OR, SDLoc(N), VT, N0, N1); + } } } -- 2.34.1