From deaa64546ea1d0922aa4671a05f13be3d7c9d53c Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Fri, 19 Aug 2011 22:39:31 +0000 Subject: [PATCH] Roll back the rest of r126557. It's a hack that will break in some obscure cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138130 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 ------ 1 file changed, 6 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 51aca66eef8..1d17473b466 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1526,12 +1526,6 @@ SDValue DAGCombiner::visitADDE(SDNode *N) { ConstantSDNode *N0C = dyn_cast(N0); ConstantSDNode *N1C = dyn_cast(N1); - // If both operands are null we know that carry out will always be false. - if (N0C && N0C->isNullValue() && N0 == N1) - DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), DAG.getNode(ISD::CARRY_FALSE, - N->getDebugLoc(), - MVT::Glue)); - // canonicalize constant to RHS if (N0C && !N1C) return DAG.getNode(ISD::ADDE, N->getDebugLoc(), N->getVTList(),