From 51679c430f1c02cea0717bb20d9b7eac84adf9b2 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 13 Apr 2005 19:41:05 +0000 Subject: [PATCH] avoid work when possible, perhaps fix the problem nate and andrew are seeing with != 0 comparisons vanishing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21287 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 1 + 1 file changed, 1 insertion(+) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 48e0f7bc9ad..4b3064593c7 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -286,6 +286,7 @@ SelectionDAG::~SelectionDAG() { } SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) { + if (Op.getValueType() == VT) return Op; int64_t Imm = ~0ULL >> 64-MVT::getSizeInBits(VT); return getNode(ISD::AND, Op.getValueType(), Op, getConstant(Imm, Op.getValueType())); -- 2.34.1