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[DAGCombiner] Refactor to make it easy to add support for vectors in a future patch. NFCI.

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llvm-svn: 301320
This commit is contained in:
Simon Pilgrim 2017-04-25 16:16:03 +00:00
parent b0c76d3c64
commit 5ce342b483
1 changed files with 10 additions and 10 deletions
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10
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4203,18 +4203,18 @@ SDValue DAGCombiner::visitOR(SDNode *N) {
// Canonicalize (or (and X, c1), c2) -> (and (or X, c2), c1|c2) // Canonicalize (or (and X, c1), c2) -> (and (or X, c2), c1|c2)
// iff (c1 & c2) != 0. // iff (c1 & c2) != 0.
if (N1C && N0.getOpcode() == ISD::AND && N0.getNode()->hasOneUse() && if (N1C && N0.getOpcode() == ISD::AND && N0.getNode()->hasOneUse()) {
isa<ConstantSDNode>(N0.getOperand(1))) { if (ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(N0.getOperand(1))) {
ConstantSDNode *C1 = cast<ConstantSDNode>(N0.getOperand(1));
if (C1->getAPIntValue().intersects(N1C->getAPIntValue())) { if (C1->getAPIntValue().intersects(N1C->getAPIntValue())) {
if (SDValue COR = DAG.FoldConstantArithmetic(ISD::OR, SDLoc(N1), VT, if (SDValue COR =
N1C, C1)) DAG.FoldConstantArithmetic(ISD::OR, SDLoc(N1), VT, N1C, C1))
return DAG.getNode( return DAG.getNode(
ISD::AND, SDLoc(N), VT, ISD::AND, SDLoc(N), VT,
DAG.getNode(ISD::OR, SDLoc(N0), VT, N0.getOperand(0), N1), COR); DAG.getNode(ISD::OR, SDLoc(N0), VT, N0.getOperand(0), N1), COR);
return SDValue(); return SDValue();
} }
} }
}
// Simplify: (or (op x...), (op y...)) -> (op (or x, y)) // Simplify: (or (op x...), (op y...)) -> (op (or x, y))
if (N0.getOpcode() == N1.getOpcode()) if (N0.getOpcode() == N1.getOpcode())