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Misc. code cleanups. 

llvm-svn: 131495
This commit is contained in:
Dan Gohman 2011-05-17 22:20:36 +00:00
parent 112f5696fb
commit 4298df6d86
1 changed files with 34 additions and 33 deletions
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67
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -529,7 +529,8 @@ SDValue DAGCombiner::ReassociateOps(unsigned Opc, DebugLoc DL,
cast<ConstantSDNode>(N0.getOperand(1)),
cast<ConstantSDNode>(N1));
return DAG.getNode(Opc, DL, VT, N0.getOperand(0), OpNode);
} else if (N0.hasOneUse()) {
}
if (N0.hasOneUse()) {
// reassoc. (op (op x, c1), y) -> (op (op x, y), c1) iff x+c1 has one use
SDValue OpNode = DAG.getNode(Opc, N0.getDebugLoc(), VT,
N0.getOperand(0), N1);
@ -546,7 +547,8 @@ SDValue DAGCombiner::ReassociateOps(unsigned Opc, DebugLoc DL,
cast<ConstantSDNode>(N1.getOperand(1)),
cast<ConstantSDNode>(N0));
return DAG.getNode(Opc, DL, VT, N1.getOperand(0), OpNode);
} else if (N1.hasOneUse()) {
}
if (N1.hasOneUse()) {
// reassoc. (op y, (op x, c1)) -> (op (op x, y), c1) iff x+c1 has one use
SDValue OpNode = DAG.getNode(Opc, N0.getDebugLoc(), VT,
N1.getOperand(0), N0);
@ -1566,7 +1568,8 @@ static SDValue tryFoldToZero(DebugLoc DL, const TargetLowering &TLI, EVT VT,
SelectionDAG &DAG, bool LegalOperations) {
if (!VT.isVector()) {
return DAG.getConstant(0, VT);
} else if (!LegalOperations || TLI.isOperationLegal(ISD::BUILD_VECTOR, VT)) {
}
if (!LegalOperations || TLI.isOperationLegal(ISD::BUILD_VECTOR, VT)) {
// Produce a vector of zeros.
SDValue El = DAG.getConstant(0, VT.getVectorElementType());
std::vector<SDValue> Ops(VT.getVectorNumElements(), El);
@ -4014,7 +4017,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
EVT EltVT = VT.getVectorElementType();
SmallVector<SDValue,8> OneOps(VT.getVectorNumElements(),
DAG.getConstant(1, EltVT));
if (VT.getSizeInBits() == N0VT.getSizeInBits()) {
if (VT.getSizeInBits() == N0VT.getSizeInBits())
// We know that the # elements of the results is the same as the
// # elements of the compare (and the # elements of the compare result
// for that matter). Check to see that they are the same size. If so,
@ -4026,25 +4029,24 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
cast<CondCodeSDNode>(N0.getOperand(2))->get()),
DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), VT,
&OneOps[0], OneOps.size()));
} else {
// If the desired elements are smaller or larger than the source
// elements we can use a matching integer vector type and then
// truncate/sign extend
EVT MatchingElementType =
EVT::getIntegerVT(*DAG.getContext(),
N0VT.getScalarType().getSizeInBits());
EVT MatchingVectorType =
EVT::getVectorVT(*DAG.getContext(), MatchingElementType,
N0VT.getVectorNumElements());
SDValue VsetCC =
DAG.getVSetCC(N->getDebugLoc(), MatchingVectorType, N0.getOperand(0),
N0.getOperand(1),
cast<CondCodeSDNode>(N0.getOperand(2))->get());
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
DAG.getSExtOrTrunc(VsetCC, N->getDebugLoc(), VT),
DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), VT,
&OneOps[0], OneOps.size()));
}
// If the desired elements are smaller or larger than the source
// elements we can use a matching integer vector type and then
// truncate/sign extend
EVT MatchingElementType =
EVT::getIntegerVT(*DAG.getContext(),
N0VT.getScalarType().getSizeInBits());
EVT MatchingVectorType =
EVT::getVectorVT(*DAG.getContext(), MatchingElementType,
N0VT.getVectorNumElements());
SDValue VsetCC =
DAG.getVSetCC(N->getDebugLoc(), MatchingVectorType, N0.getOperand(0),
N0.getOperand(1),
cast<CondCodeSDNode>(N0.getOperand(2))->get());
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
DAG.getSExtOrTrunc(VsetCC, N->getDebugLoc(), VT),
DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), VT,
&OneOps[0], OneOps.size()));
}
// zext(setcc x,y,cc) -> select_cc x, y, 1, 0, cc
@ -7505,18 +7507,17 @@ bool DAGCombiner::FindAliasInfo(SDNode *N,
SrcValueAlign = LD->getOriginalAlignment();
TBAAInfo = LD->getTBAAInfo();
return true;
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
}
if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
Ptr = ST->getBasePtr();
Size = ST->getMemoryVT().getSizeInBits() >> 3;
SrcValue = ST->getSrcValue();
SrcValueOffset = ST->getSrcValueOffset();
SrcValueAlign = ST->getOriginalAlignment();
TBAAInfo = ST->getTBAAInfo();
} else {
llvm_unreachable("FindAliasInfo expected a memory operand");
return false;
}
return false;
llvm_unreachable("FindAliasInfo expected a memory operand");
}
/// GatherAllAliases - Walk up chain skipping non-aliasing memory nodes,
@ -7629,13 +7630,13 @@ SDValue DAGCombiner::FindBetterChain(SDNode *N, SDValue OldChain) {
// Accumulate all the aliases to this node.
GatherAllAliases(N, OldChain, Aliases);
if (Aliases.size() == 0) {
// If no operands then chain to entry token.
// If no operands then chain to entry token.
if (Aliases.size() == 0)
return DAG.getEntryNode();
} else if (Aliases.size() == 1) {
// If a single operand then chain to it. We don't need to revisit it.
// If a single operand then chain to it. We don't need to revisit it.
if (Aliases.size() == 1)
return Aliases[0];
}
// Construct a custom tailored token factor.
return DAG.getNode(ISD::TokenFactor, N->getDebugLoc(), MVT::Other,