X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FSelectionDAG%2FLegalizeTypes.cpp;h=39337fff50791283884db2b89469db8b0c9ba88f;hb=d2ea0e10cbd158c93fb870cdd03001b9cd1156b8;hp=8454dda303bcb3e39f5a0215ed4dd16473799d3a;hpb=47d9dcc584cdb7fd645ca1d5c2a0ce363570aeb7;p=oota-llvm.git diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp index 8454dda303b..39337fff507 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp @@ -15,9 +15,11 @@ #include "LegalizeTypes.h" #include "llvm/CallingConv.h" -#include "llvm/ADT/SmallPtrSet.h" -#include "llvm/Support/CommandLine.h" #include "llvm/Target/TargetData.h" +#include "llvm/ADT/SetVector.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" using namespace llvm; static cl::opt @@ -62,8 +64,12 @@ void DAGTypeLegalizer::PerformExpensiveChecks() { // The final node obtained by mapping by ReplacedValues is not marked NewNode. // Note that ReplacedValues should be applied iteratively. - // Note that the ReplacedValues map may also map deleted nodes. By iterating - // over the DAG we only consider non-deleted nodes. + // Note that the ReplacedValues map may also map deleted nodes (by iterating + // over the DAG we never dereference deleted nodes). This means that it may + // also map nodes marked NewNode if the deallocated memory was reallocated as + // another node, and that new node was not seen by the LegalizeTypes machinery + // (for example because it was created but not used). In general, we cannot + // distinguish between new nodes and deleted nodes. SmallVector NewNodes; for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(), E = DAG.allnodes_end(); I != E; ++I) { @@ -81,7 +87,7 @@ void DAGTypeLegalizer::PerformExpensiveChecks() { // Check that remapped values are only used by nodes marked NewNode. for (SDNode::use_iterator UI = I->use_begin(), UE = I->use_end(); UI != UE; ++UI) - if (UI.getUse().getSDValue().getResNo() == i) + if (UI.getUse().getResNo() == i) assert(UI->getNodeId() == NewNode && "Remapped value has non-trivial use!"); @@ -108,44 +114,52 @@ void DAGTypeLegalizer::PerformExpensiveChecks() { Mapped |= 32; if (SplitVectors.find(Res) != SplitVectors.end()) Mapped |= 64; + if (WidenedVectors.find(Res) != WidenedVectors.end()) + Mapped |= 128; if (I->getNodeId() != Processed) { - if (Mapped != 0) { - cerr << "Unprocessed value in a map!"; + // Since we allow ReplacedValues to map deleted nodes, it may map nodes + // marked NewNode too, since a deleted node may have been reallocated as + // another node that has not been seen by the LegalizeTypes machinery. + if ((I->getNodeId() == NewNode && Mapped > 1) || + (I->getNodeId() != NewNode && Mapped != 0)) { + dbgs() << "Unprocessed value in a map!"; Failed = true; } } else if (isTypeLegal(Res.getValueType()) || IgnoreNodeResults(I)) { if (Mapped > 1) { - cerr << "Value with legal type was transformed!"; + dbgs() << "Value with legal type was transformed!"; Failed = true; } } else { if (Mapped == 0) { - cerr << "Processed value not in any map!"; + dbgs() << "Processed value not in any map!"; Failed = true; } else if (Mapped & (Mapped - 1)) { - cerr << "Value in multiple maps!"; + dbgs() << "Value in multiple maps!"; Failed = true; } } if (Failed) { if (Mapped & 1) - cerr << " ReplacedValues"; + dbgs() << " ReplacedValues"; if (Mapped & 2) - cerr << " PromotedIntegers"; + dbgs() << " PromotedIntegers"; if (Mapped & 4) - cerr << " SoftenedFloats"; + dbgs() << " SoftenedFloats"; if (Mapped & 8) - cerr << " ScalarizedVectors"; + dbgs() << " ScalarizedVectors"; if (Mapped & 16) - cerr << " ExpandedIntegers"; + dbgs() << " ExpandedIntegers"; if (Mapped & 32) - cerr << " ExpandedFloats"; + dbgs() << " ExpandedFloats"; if (Mapped & 64) - cerr << " SplitVectors"; - cerr << "\n"; - abort(); + dbgs() << " SplitVectors"; + if (Mapped & 128) + dbgs() << " WidenedVectors"; + dbgs() << "\n"; + llvm_unreachable(0); } } } @@ -206,41 +220,43 @@ bool DAGTypeLegalizer::run() { // Scan the values produced by the node, checking to see if any result // types are illegal. for (unsigned i = 0, NumResults = N->getNumValues(); i < NumResults; ++i) { - MVT ResultVT = N->getValueType(i); + EVT ResultVT = N->getValueType(i); switch (getTypeAction(ResultVT)) { - default: - assert(false && "Unknown action!"); - case Legal: + case TargetLowering::TypeLegal: break; // The following calls must take care of *all* of the node's results, // not just the illegal result they were passed (this includes results // with a legal type). Results can be remapped using ReplaceValueWith, // or their promoted/expanded/etc values registered in PromotedIntegers, // ExpandedIntegers etc. - case PromoteInteger: + case TargetLowering::TypePromoteInteger: PromoteIntegerResult(N, i); Changed = true; goto NodeDone; - case ExpandInteger: + case TargetLowering::TypeExpandInteger: ExpandIntegerResult(N, i); Changed = true; goto NodeDone; - case SoftenFloat: + case TargetLowering::TypeSoftenFloat: SoftenFloatResult(N, i); Changed = true; goto NodeDone; - case ExpandFloat: + case TargetLowering::TypeExpandFloat: ExpandFloatResult(N, i); Changed = true; goto NodeDone; - case ScalarizeVector: + case TargetLowering::TypeScalarizeVector: ScalarizeVectorResult(N, i); Changed = true; goto NodeDone; - case SplitVector: + case TargetLowering::TypeSplitVector: SplitVectorResult(N, i); Changed = true; goto NodeDone; + case TargetLowering::TypeWidenVector: + WidenVectorResult(N, i); + Changed = true; + goto NodeDone; } } @@ -255,39 +271,41 @@ ScanOperands: if (IgnoreNodeResults(N->getOperand(i).getNode())) continue; - MVT OpVT = N->getOperand(i).getValueType(); + EVT OpVT = N->getOperand(i).getValueType(); switch (getTypeAction(OpVT)) { - default: - assert(false && "Unknown action!"); - case Legal: + case TargetLowering::TypeLegal: continue; // The following calls must either replace all of the node's results // using ReplaceValueWith, and return "false"; or update the node's // operands in place, and return "true". - case PromoteInteger: + case TargetLowering::TypePromoteInteger: NeedsReanalyzing = PromoteIntegerOperand(N, i); Changed = true; break; - case ExpandInteger: + case TargetLowering::TypeExpandInteger: NeedsReanalyzing = ExpandIntegerOperand(N, i); Changed = true; break; - case SoftenFloat: + case TargetLowering::TypeSoftenFloat: NeedsReanalyzing = SoftenFloatOperand(N, i); Changed = true; break; - case ExpandFloat: + case TargetLowering::TypeExpandFloat: NeedsReanalyzing = ExpandFloatOperand(N, i); Changed = true; break; - case ScalarizeVector: + case TargetLowering::TypeScalarizeVector: NeedsReanalyzing = ScalarizeVectorOperand(N, i); Changed = true; break; - case SplitVector: + case TargetLowering::TypeSplitVector: NeedsReanalyzing = SplitVectorOperand(N, i); Changed = true; break; + case TargetLowering::TypeWidenVector: + NeedsReanalyzing = WidenVectorOperand(N, i); + Changed = true; + break; } break; } @@ -307,17 +325,20 @@ ScanOperands: // The node morphed - this is equivalent to legalizing by replacing every // value of N with the corresponding value of M. So do that now. - N->setNodeId(ReadyToProcess); assert(N->getNumValues() == M->getNumValues() && "Node morphing changed the number of results!"); for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) // Replacing the value takes care of remapping the new value. ReplaceValueWith(SDValue(N, i), SDValue(M, i)); - // Fall through. + assert(N->getNodeId() == NewNode && "Unexpected node state!"); + // The node continues to live on as part of the NewNode fungus that + // grows on top of the useful nodes. Nothing more needs to be done + // with it - move on to the next node. + continue; } if (i == NumOperands) { - DEBUG(cerr << "Legally typed node: "; N->dump(&DAG); cerr << "\n"); + DEBUG(dbgs() << "Legally typed node: "; N->dump(&DAG); dbgs() << "\n"); } } NodeDone: @@ -386,7 +407,7 @@ NodeDone: if (!IgnoreNodeResults(I)) for (unsigned i = 0, NumVals = I->getNumValues(); i < NumVals; ++i) if (!isTypeLegal(I->getValueType(i))) { - cerr << "Result type " << i << " illegal!\n"; + dbgs() << "Result type " << i << " illegal!\n"; Failed = true; } @@ -394,25 +415,25 @@ NodeDone: for (unsigned i = 0, NumOps = I->getNumOperands(); i < NumOps; ++i) if (!IgnoreNodeResults(I->getOperand(i).getNode()) && !isTypeLegal(I->getOperand(i).getValueType())) { - cerr << "Operand type " << i << " illegal!\n"; + dbgs() << "Operand type " << i << " illegal!\n"; Failed = true; } if (I->getNodeId() != Processed) { if (I->getNodeId() == NewNode) - cerr << "New node not analyzed?\n"; + dbgs() << "New node not analyzed?\n"; else if (I->getNodeId() == Unanalyzed) - cerr << "Unanalyzed node not noticed?\n"; + dbgs() << "Unanalyzed node not noticed?\n"; else if (I->getNodeId() > 0) - cerr << "Operand not processed?\n"; + dbgs() << "Operand not processed?\n"; else if (I->getNodeId() == ReadyToProcess) - cerr << "Not added to worklist?\n"; + dbgs() << "Not added to worklist?\n"; Failed = true; } if (Failed) { - I->dump(&DAG); cerr << "\n"; - abort(); + I->dump(&DAG); dbgs() << "\n"; + llvm_unreachable(0); } } #endif @@ -460,16 +481,14 @@ SDNode *DAGTypeLegalizer::AnalyzeNewNode(SDNode *N) { NewOps.push_back(Op); } else if (Op != OrigOp) { // This is the first operand to change - add all operands so far. - for (unsigned j = 0; j < i; ++j) - NewOps.push_back(N->getOperand(j)); + NewOps.append(N->op_begin(), N->op_begin() + i); NewOps.push_back(Op); } } // Some operands changed - update the node. if (!NewOps.empty()) { - SDNode *M = DAG.UpdateNodeOperands(SDValue(N, 0), &NewOps[0], - NewOps.size()).getNode(); + SDNode *M = DAG.UpdateNodeOperands(N, &NewOps[0], NewOps.size()); if (M != N) { // The node morphed into a different node. Normally for this to happen // the original node would have to be marked NewNode. However this can @@ -552,6 +571,12 @@ void DAGTypeLegalizer::ExpungeNode(SDNode *N) { RemapValue(I->second); } + for (DenseMap::iterator I = WidenedVectors.begin(), + E = WidenedVectors.end(); I != E; ++I) { + assert(I->first.getNode() != N); + RemapValue(I->second); + } + for (DenseMap >::iterator I = ExpandedIntegers.begin(), E = ExpandedIntegers.end(); I != E; ++I){ assert(I->first.getNode() != N); @@ -597,16 +622,14 @@ void DAGTypeLegalizer::RemapValue(SDValue &N) { namespace { /// NodeUpdateListener - This class is a DAGUpdateListener that listens for /// updates to nodes and recomputes their ready state. - class VISIBILITY_HIDDEN NodeUpdateListener : - public SelectionDAG::DAGUpdateListener { + class NodeUpdateListener : public SelectionDAG::DAGUpdateListener { DAGTypeLegalizer &DTL; - SmallVectorImpl &NodesToAnalyze; - SmallPtrSet &NodesDeleted; + SmallSetVector &NodesToAnalyze; public: explicit NodeUpdateListener(DAGTypeLegalizer &dtl, - SmallVectorImpl &nta, - SmallPtrSet &nd) - : DTL(dtl), NodesToAnalyze(nta), NodesDeleted(nd) {} + SmallSetVector &nta) + : SelectionDAG::DAGUpdateListener(dtl.getDAG()), + DTL(dtl), NodesToAnalyze(nta) {} virtual void NodeDeleted(SDNode *N, SDNode *E) { assert(N->getNodeId() != DAGTypeLegalizer::ReadyToProcess && @@ -618,15 +641,15 @@ namespace { DTL.NoteDeletion(N, E); // In theory the deleted node could also have been scheduled for analysis. - // So add it to the set of nodes which will not be analyzed. - NodesDeleted.insert(N); + // So remove it from the set of nodes which will be analyzed. + NodesToAnalyze.remove(N); // In general nothing needs to be done for E, since it didn't change but // only gained new uses. However N -> E was just added to ReplacedValues, // and the result of a ReplacedValues mapping is not allowed to be marked // NewNode. So if E is marked NewNode, then it needs to be analyzed. if (E->getNodeId() == DAGTypeLegalizer::NewNode) - NodesToAnalyze.push_back(E); + NodesToAnalyze.insert(E); } virtual void NodeUpdated(SDNode *N) { @@ -636,7 +659,8 @@ namespace { assert(N->getNodeId() != DAGTypeLegalizer::ReadyToProcess && N->getNodeId() != DAGTypeLegalizer::Processed && "Invalid node ID for RAUW deletion!"); - NodesToAnalyze.push_back(N); + N->setNodeId(DAGTypeLegalizer::NewNode); + NodesToAnalyze.insert(N); } }; } @@ -646,8 +670,6 @@ namespace { /// value. Update the DAG and NodeIds replacing any uses of From to use To /// instead. void DAGTypeLegalizer::ReplaceValueWith(SDValue From, SDValue To) { - assert(From.getNode()->getNodeId() == ReadyToProcess && - "Only the node being processed may be remapped!"); assert(From.getNode() != To.getNode() && "Potential legalization loop!"); // If expansion produced new nodes, make sure they are properly marked. @@ -656,49 +678,58 @@ void DAGTypeLegalizer::ReplaceValueWith(SDValue From, SDValue To) { // Anything that used the old node should now use the new one. Note that this // can potentially cause recursive merging. - SmallVector NodesToAnalyze; - SmallPtrSet NodesDeleted; - NodeUpdateListener NUL(*this, NodesToAnalyze, NodesDeleted); - DAG.ReplaceAllUsesOfValueWith(From, To, &NUL); - - // The old node may still be present in a map like ExpandedIntegers or - // PromotedIntegers. Inform maps about the replacement. - ReplacedValues[From] = To; - - // Process the list of nodes that need to be reanalyzed. - while (!NodesToAnalyze.empty()) { - SDNode *N = NodesToAnalyze.back(); - NodesToAnalyze.pop_back(); - - // Do not analyze deleted nodes! - if (NodesDeleted.count(N)) - continue; + SmallSetVector NodesToAnalyze; + NodeUpdateListener NUL(*this, NodesToAnalyze); + do { + DAG.ReplaceAllUsesOfValueWith(From, To); + + // The old node may still be present in a map like ExpandedIntegers or + // PromotedIntegers. Inform maps about the replacement. + ReplacedValues[From] = To; + + // Process the list of nodes that need to be reanalyzed. + while (!NodesToAnalyze.empty()) { + SDNode *N = NodesToAnalyze.back(); + NodesToAnalyze.pop_back(); + if (N->getNodeId() != DAGTypeLegalizer::NewNode) + // The node was analyzed while reanalyzing an earlier node - it is safe + // to skip. Note that this is not a morphing node - otherwise it would + // still be marked NewNode. + continue; - // Analyze the node's operands and recalculate the node ID. - assert(N->getNodeId() != DAGTypeLegalizer::ReadyToProcess && - N->getNodeId() != DAGTypeLegalizer::Processed && - "Invalid node ID for RAUW analysis!"); - N->setNodeId(NewNode); - SDNode *M = AnalyzeNewNode(N); - if (M != N) { - // The node morphed into a different node. Make everyone use the new node - // instead. - assert(M->getNodeId() != NewNode && "Analysis resulted in NewNode!"); - assert(N->getNumValues() == M->getNumValues() && - "Node morphing changed the number of results!"); - for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) { - SDValue OldVal(N, i); - SDValue NewVal(M, i); - if (M->getNodeId() == Processed) - RemapValue(NewVal); - DAG.ReplaceAllUsesOfValueWith(OldVal, NewVal, &NUL); + // Analyze the node's operands and recalculate the node ID. + SDNode *M = AnalyzeNewNode(N); + if (M != N) { + // The node morphed into a different node. Make everyone use the new + // node instead. + assert(M->getNodeId() != NewNode && "Analysis resulted in NewNode!"); + assert(N->getNumValues() == M->getNumValues() && + "Node morphing changed the number of results!"); + for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) { + SDValue OldVal(N, i); + SDValue NewVal(M, i); + if (M->getNodeId() == Processed) + RemapValue(NewVal); + DAG.ReplaceAllUsesOfValueWith(OldVal, NewVal); + // OldVal may be a target of the ReplacedValues map which was marked + // NewNode to force reanalysis because it was updated. Ensure that + // anything that ReplacedValues mapped to OldVal will now be mapped + // all the way to NewVal. + ReplacedValues[OldVal] = NewVal; + } + // The original node continues to exist in the DAG, marked NewNode. } - // The original node continues to exist in the DAG, marked NewNode. } - } + // When recursively update nodes with new nodes, it is possible to have + // new uses of From due to CSE. If this happens, replace the new uses of + // From with To. + } while (!From.use_empty()); } void DAGTypeLegalizer::SetPromotedInteger(SDValue Op, SDValue Result) { + assert(Result.getValueType() == + TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType()) && + "Invalid type for promoted integer"); AnalyzeNewValue(Result); SDValue &OpEntry = PromotedIntegers[Op]; @@ -707,6 +738,9 @@ void DAGTypeLegalizer::SetPromotedInteger(SDValue Op, SDValue Result) { } void DAGTypeLegalizer::SetSoftenedFloat(SDValue Op, SDValue Result) { + assert(Result.getValueType() == + TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType()) && + "Invalid type for softened float"); AnalyzeNewValue(Result); SDValue &OpEntry = SoftenedFloats[Op]; @@ -715,6 +749,12 @@ void DAGTypeLegalizer::SetSoftenedFloat(SDValue Op, SDValue Result) { } void DAGTypeLegalizer::SetScalarizedVector(SDValue Op, SDValue Result) { + // Note that in some cases vector operation operands may be greater than + // the vector element type. For example BUILD_VECTOR of type <1 x i1> with + // a constant i8 operand. + assert(Result.getValueType().getSizeInBits() >= + Op.getValueType().getVectorElementType().getSizeInBits() && + "Invalid type for scalarized vector"); AnalyzeNewValue(Result); SDValue &OpEntry = ScalarizedVectors[Op]; @@ -734,6 +774,10 @@ void DAGTypeLegalizer::GetExpandedInteger(SDValue Op, SDValue &Lo, void DAGTypeLegalizer::SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi) { + assert(Lo.getValueType() == + TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType()) && + Hi.getValueType() == Lo.getValueType() && + "Invalid type for expanded integer"); // Lo/Hi may have been newly allocated, if so, add nodeid's as relevant. AnalyzeNewValue(Lo); AnalyzeNewValue(Hi); @@ -757,6 +801,10 @@ void DAGTypeLegalizer::GetExpandedFloat(SDValue Op, SDValue &Lo, void DAGTypeLegalizer::SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi) { + assert(Lo.getValueType() == + TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType()) && + Hi.getValueType() == Lo.getValueType() && + "Invalid type for expanded float"); // Lo/Hi may have been newly allocated, if so, add nodeid's as relevant. AnalyzeNewValue(Lo); AnalyzeNewValue(Hi); @@ -780,6 +828,12 @@ void DAGTypeLegalizer::GetSplitVector(SDValue Op, SDValue &Lo, void DAGTypeLegalizer::SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi) { + assert(Lo.getValueType().getVectorElementType() == + Op.getValueType().getVectorElementType() && + 2*Lo.getValueType().getVectorNumElements() == + Op.getValueType().getVectorNumElements() && + Hi.getValueType() == Lo.getValueType() && + "Invalid type for split vector"); // Lo/Hi may have been newly allocated, if so, add nodeid's as relevant. AnalyzeNewValue(Lo); AnalyzeNewValue(Hi); @@ -791,6 +845,17 @@ void DAGTypeLegalizer::SetSplitVector(SDValue Op, SDValue Lo, Entry.second = Hi; } +void DAGTypeLegalizer::SetWidenedVector(SDValue Op, SDValue Result) { + assert(Result.getValueType() == + TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType()) && + "Invalid type for widened vector"); + AnalyzeNewValue(Result); + + SDValue &OpEntry = WidenedVectors[Op]; + assert(OpEntry.getNode() == 0 && "Node already widened!"); + OpEntry = Result; +} + //===----------------------------------------------------------------------===// // Utilities. @@ -799,30 +864,54 @@ void DAGTypeLegalizer::SetSplitVector(SDValue Op, SDValue Lo, /// BitConvertToInteger - Convert to an integer of the same size. SDValue DAGTypeLegalizer::BitConvertToInteger(SDValue Op) { unsigned BitWidth = Op.getValueType().getSizeInBits(); - return DAG.getNode(ISD::BIT_CONVERT, MVT::getIntegerVT(BitWidth), Op); + return DAG.getNode(ISD::BITCAST, Op.getDebugLoc(), + EVT::getIntegerVT(*DAG.getContext(), BitWidth), Op); +} + +/// BitConvertVectorToIntegerVector - Convert to a vector of integers of the +/// same size. +SDValue DAGTypeLegalizer::BitConvertVectorToIntegerVector(SDValue Op) { + assert(Op.getValueType().isVector() && "Only applies to vectors!"); + unsigned EltWidth = Op.getValueType().getVectorElementType().getSizeInBits(); + EVT EltNVT = EVT::getIntegerVT(*DAG.getContext(), EltWidth); + unsigned NumElts = Op.getValueType().getVectorNumElements(); + return DAG.getNode(ISD::BITCAST, Op.getDebugLoc(), + EVT::getVectorVT(*DAG.getContext(), EltNVT, NumElts), Op); } SDValue DAGTypeLegalizer::CreateStackStoreLoad(SDValue Op, - MVT DestVT) { + EVT DestVT) { + DebugLoc dl = Op.getDebugLoc(); // Create the stack frame object. Make sure it is aligned for both // the source and destination types. SDValue StackPtr = DAG.CreateStackTemporary(Op.getValueType(), DestVT); // Emit a store to the stack slot. - SDValue Store = DAG.getStore(DAG.getEntryNode(), Op, StackPtr, NULL, 0); + SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op, StackPtr, + MachinePointerInfo(), false, false, 0); // Result is a load from the stack slot. - return DAG.getLoad(DestVT, Store, StackPtr, NULL, 0); + return DAG.getLoad(DestVT, dl, Store, StackPtr, MachinePointerInfo(), + false, false, false, 0); } -/// CustomLowerResults - Replace the node's results with custom code provided +/// CustomLowerNode - Replace the node's results with custom code provided /// by the target and return "true", or do nothing and return "false". -bool DAGTypeLegalizer::CustomLowerResults(SDNode *N, unsigned ResNo) { +/// The last parameter is FALSE if we are dealing with a node with legal +/// result types and illegal operand. The second parameter denotes the type of +/// illegal OperandNo in that case. +/// The last parameter being TRUE means we are dealing with a +/// node with illegal result types. The second parameter denotes the type of +/// illegal ResNo in that case. +bool DAGTypeLegalizer::CustomLowerNode(SDNode *N, EVT VT, bool LegalizeResult) { // See if the target wants to custom lower this node. - if (TLI.getOperationAction(N->getOpcode(), N->getValueType(ResNo)) != - TargetLowering::Custom) + if (TLI.getOperationAction(N->getOpcode(), VT) != TargetLowering::Custom) return false; SmallVector Results; - TLI.ReplaceNodeResults(N, Results, DAG); + if (LegalizeResult) + TLI.ReplaceNodeResults(N, Results, DAG); + else + TLI.LowerOperationWrapper(N, Results, DAG); + if (Results.empty()) // The target didn't want to custom lower it after all. return false; @@ -835,53 +924,129 @@ bool DAGTypeLegalizer::CustomLowerResults(SDNode *N, unsigned ResNo) { return true; } -/// JoinIntegers - Build an integer with low bits Lo and high bits Hi. -SDValue DAGTypeLegalizer::JoinIntegers(SDValue Lo, SDValue Hi) { - MVT LVT = Lo.getValueType(); - MVT HVT = Hi.getValueType(); - MVT NVT = MVT::getIntegerVT(LVT.getSizeInBits() + HVT.getSizeInBits()); - Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, Lo); - Hi = DAG.getNode(ISD::ANY_EXTEND, NVT, Hi); - Hi = DAG.getNode(ISD::SHL, NVT, Hi, DAG.getConstant(LVT.getSizeInBits(), - TLI.getShiftAmountTy())); - return DAG.getNode(ISD::OR, NVT, Lo, Hi); +/// CustomWidenLowerNode - Widen the node's results with custom code provided +/// by the target and return "true", or do nothing and return "false". +bool DAGTypeLegalizer::CustomWidenLowerNode(SDNode *N, EVT VT) { + // See if the target wants to custom lower this node. + if (TLI.getOperationAction(N->getOpcode(), VT) != TargetLowering::Custom) + return false; + + SmallVector Results; + TLI.ReplaceNodeResults(N, Results, DAG); + + if (Results.empty()) + // The target didn't want to custom widen lower its result after all. + return false; + + // Update the widening map. + assert(Results.size() == N->getNumValues() && + "Custom lowering returned the wrong number of results!"); + for (unsigned i = 0, e = Results.size(); i != e; ++i) + SetWidenedVector(SDValue(N, i), Results[i]); + return true; } -/// SplitInteger - Return the lower LoVT bits of Op in Lo and the upper HiVT -/// bits in Hi. -void DAGTypeLegalizer::SplitInteger(SDValue Op, - MVT LoVT, MVT HiVT, - SDValue &Lo, SDValue &Hi) { - assert(LoVT.getSizeInBits() + HiVT.getSizeInBits() == - Op.getValueType().getSizeInBits() && "Invalid integer splitting!"); - Lo = DAG.getNode(ISD::TRUNCATE, LoVT, Op); - Hi = DAG.getNode(ISD::SRL, Op.getValueType(), Op, - DAG.getConstant(LoVT.getSizeInBits(), - TLI.getShiftAmountTy())); - Hi = DAG.getNode(ISD::TRUNCATE, HiVT, Hi); +SDValue DAGTypeLegalizer::DisintegrateMERGE_VALUES(SDNode *N, unsigned ResNo) { + for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) + if (i != ResNo) + ReplaceValueWith(SDValue(N, i), SDValue(N->getOperand(i))); + return SDValue(N->getOperand(ResNo)); } -/// SplitInteger - Return the lower and upper halves of Op's bits in a value -/// type half the size of Op's. -void DAGTypeLegalizer::SplitInteger(SDValue Op, - SDValue &Lo, SDValue &Hi) { - MVT HalfVT = MVT::getIntegerVT(Op.getValueType().getSizeInBits()/2); - SplitInteger(Op, HalfVT, HalfVT, Lo, Hi); +/// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type +/// which is split into two not necessarily identical pieces. +void DAGTypeLegalizer::GetSplitDestVTs(EVT InVT, EVT &LoVT, EVT &HiVT) { + // Currently all types are split in half. + if (!InVT.isVector()) { + LoVT = HiVT = TLI.getTypeToTransformTo(*DAG.getContext(), InVT); + } else { + unsigned NumElements = InVT.getVectorNumElements(); + assert(!(NumElements & 1) && "Splitting vector, but not in half!"); + LoVT = HiVT = EVT::getVectorVT(*DAG.getContext(), + InVT.getVectorElementType(), NumElements/2); + } +} + +/// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and +/// high parts of the given value. +void DAGTypeLegalizer::GetPairElements(SDValue Pair, + SDValue &Lo, SDValue &Hi) { + DebugLoc dl = Pair.getDebugLoc(); + EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), Pair.getValueType()); + Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Pair, + DAG.getIntPtrConstant(0)); + Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Pair, + DAG.getIntPtrConstant(1)); +} + +SDValue DAGTypeLegalizer::GetVectorElementPointer(SDValue VecPtr, EVT EltVT, + SDValue Index) { + DebugLoc dl = Index.getDebugLoc(); + // Make sure the index type is big enough to compute in. + if (Index.getValueType().bitsGT(TLI.getPointerTy())) + Index = DAG.getNode(ISD::TRUNCATE, dl, TLI.getPointerTy(), Index); + else + Index = DAG.getNode(ISD::ZERO_EXTEND, dl, TLI.getPointerTy(), Index); + + // Calculate the element offset and add it to the pointer. + unsigned EltSize = EltVT.getSizeInBits() / 8; // FIXME: should be ABI size. + + Index = DAG.getNode(ISD::MUL, dl, Index.getValueType(), Index, + DAG.getConstant(EltSize, Index.getValueType())); + return DAG.getNode(ISD::ADD, dl, Index.getValueType(), Index, VecPtr); +} + +/// JoinIntegers - Build an integer with low bits Lo and high bits Hi. +SDValue DAGTypeLegalizer::JoinIntegers(SDValue Lo, SDValue Hi) { + // Arbitrarily use dlHi for result DebugLoc + DebugLoc dlHi = Hi.getDebugLoc(); + DebugLoc dlLo = Lo.getDebugLoc(); + EVT LVT = Lo.getValueType(); + EVT HVT = Hi.getValueType(); + EVT NVT = EVT::getIntegerVT(*DAG.getContext(), + LVT.getSizeInBits() + HVT.getSizeInBits()); + + Lo = DAG.getNode(ISD::ZERO_EXTEND, dlLo, NVT, Lo); + Hi = DAG.getNode(ISD::ANY_EXTEND, dlHi, NVT, Hi); + Hi = DAG.getNode(ISD::SHL, dlHi, NVT, Hi, + DAG.getConstant(LVT.getSizeInBits(), TLI.getPointerTy())); + return DAG.getNode(ISD::OR, dlHi, NVT, Lo, Hi); +} + +/// LibCallify - Convert the node into a libcall with the same prototype. +SDValue DAGTypeLegalizer::LibCallify(RTLIB::Libcall LC, SDNode *N, + bool isSigned) { + unsigned NumOps = N->getNumOperands(); + DebugLoc dl = N->getDebugLoc(); + if (NumOps == 0) { + return MakeLibCall(LC, N->getValueType(0), 0, 0, isSigned, dl); + } else if (NumOps == 1) { + SDValue Op = N->getOperand(0); + return MakeLibCall(LC, N->getValueType(0), &Op, 1, isSigned, dl); + } else if (NumOps == 2) { + SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) }; + return MakeLibCall(LC, N->getValueType(0), Ops, 2, isSigned, dl); + } + SmallVector Ops(NumOps); + for (unsigned i = 0; i < NumOps; ++i) + Ops[i] = N->getOperand(i); + + return MakeLibCall(LC, N->getValueType(0), &Ops[0], NumOps, isSigned, dl); } /// MakeLibCall - Generate a libcall taking the given operands as arguments and /// returning a result of type RetVT. -SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT, +SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, EVT RetVT, const SDValue *Ops, unsigned NumOps, - bool isSigned) { + bool isSigned, DebugLoc dl) { TargetLowering::ArgListTy Args; Args.reserve(NumOps); TargetLowering::ArgListEntry Entry; for (unsigned i = 0; i != NumOps; ++i) { Entry.Node = Ops[i]; - Entry.Ty = Entry.Node.getValueType().getTypeForMVT(); + Entry.Ty = Entry.Node.getValueType().getTypeForEVT(*DAG.getContext()); Entry.isSExt = isSigned; Entry.isZExt = !isSigned; Args.push_back(Entry); @@ -889,67 +1054,82 @@ SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT, SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC), TLI.getPointerTy()); - const Type *RetTy = RetVT.getTypeForMVT(); - std::pair CallInfo = - TLI.LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false, - false, CallingConv::C, false, Callee, Args, DAG); + Type *RetTy = RetVT.getTypeForEVT(*DAG.getContext()); + TargetLowering:: + CallLoweringInfo CLI(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false, + false, 0, TLI.getLibcallCallingConv(LC), + /*isTailCall=*/false, + /*doesNotReturn=*/false, /*isReturnValueUsed=*/true, + Callee, Args, DAG, dl); + std::pair CallInfo = TLI.LowerCallTo(CLI); + return CallInfo.first; } -/// LibCallify - Convert the node into a libcall with the same prototype. -SDValue DAGTypeLegalizer::LibCallify(RTLIB::Libcall LC, SDNode *N, - bool isSigned) { - unsigned NumOps = N->getNumOperands(); - if (NumOps == 0) { - return MakeLibCall(LC, N->getValueType(0), 0, 0, isSigned); - } else if (NumOps == 1) { - SDValue Op = N->getOperand(0); - return MakeLibCall(LC, N->getValueType(0), &Op, 1, isSigned); - } else if (NumOps == 2) { - SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) }; - return MakeLibCall(LC, N->getValueType(0), Ops, 2, isSigned); +// ExpandChainLibCall - Expand a node into a call to a libcall. Similar to +// ExpandLibCall except that the first operand is the in-chain. +std::pair +DAGTypeLegalizer::ExpandChainLibCall(RTLIB::Libcall LC, + SDNode *Node, + bool isSigned) { + SDValue InChain = Node->getOperand(0); + + TargetLowering::ArgListTy Args; + TargetLowering::ArgListEntry Entry; + for (unsigned i = 1, e = Node->getNumOperands(); i != e; ++i) { + EVT ArgVT = Node->getOperand(i).getValueType(); + Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext()); + Entry.Node = Node->getOperand(i); + Entry.Ty = ArgTy; + Entry.isSExt = isSigned; + Entry.isZExt = !isSigned; + Args.push_back(Entry); } - SmallVector Ops(NumOps); - for (unsigned i = 0; i < NumOps; ++i) - Ops[i] = N->getOperand(i); + SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC), + TLI.getPointerTy()); - return MakeLibCall(LC, N->getValueType(0), &Ops[0], NumOps, isSigned); -} + Type *RetTy = Node->getValueType(0).getTypeForEVT(*DAG.getContext()); + TargetLowering:: + CallLoweringInfo CLI(InChain, RetTy, isSigned, !isSigned, false, false, + 0, TLI.getLibcallCallingConv(LC), /*isTailCall=*/false, + /*doesNotReturn=*/false, /*isReturnValueUsed=*/true, + Callee, Args, DAG, Node->getDebugLoc()); + std::pair CallInfo = TLI.LowerCallTo(CLI); -SDValue DAGTypeLegalizer::GetVectorElementPointer(SDValue VecPtr, MVT EltVT, - SDValue Index) { - // Make sure the index type is big enough to compute in. - if (Index.getValueType().bitsGT(TLI.getPointerTy())) - Index = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), Index); - else - Index = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), Index); + return CallInfo; +} - // Calculate the element offset and add it to the pointer. - unsigned EltSize = EltVT.getSizeInBits() / 8; // FIXME: should be ABI size. +/// PromoteTargetBoolean - Promote the given target boolean to a target boolean +/// of the given type. A target boolean is an integer value, not necessarily of +/// type i1, the bits of which conform to getBooleanContents. +SDValue DAGTypeLegalizer::PromoteTargetBoolean(SDValue Bool, EVT VT) { + DebugLoc dl = Bool.getDebugLoc(); + ISD::NodeType ExtendCode = + TargetLowering::getExtendForContent(TLI.getBooleanContents(VT.isVector())); + return DAG.getNode(ExtendCode, dl, VT, Bool); +} - Index = DAG.getNode(ISD::MUL, Index.getValueType(), Index, - DAG.getConstant(EltSize, Index.getValueType())); - return DAG.getNode(ISD::ADD, Index.getValueType(), Index, VecPtr); +/// SplitInteger - Return the lower LoVT bits of Op in Lo and the upper HiVT +/// bits in Hi. +void DAGTypeLegalizer::SplitInteger(SDValue Op, + EVT LoVT, EVT HiVT, + SDValue &Lo, SDValue &Hi) { + DebugLoc dl = Op.getDebugLoc(); + assert(LoVT.getSizeInBits() + HiVT.getSizeInBits() == + Op.getValueType().getSizeInBits() && "Invalid integer splitting!"); + Lo = DAG.getNode(ISD::TRUNCATE, dl, LoVT, Op); + Hi = DAG.getNode(ISD::SRL, dl, Op.getValueType(), Op, + DAG.getConstant(LoVT.getSizeInBits(), TLI.getPointerTy())); + Hi = DAG.getNode(ISD::TRUNCATE, dl, HiVT, Hi); } -/// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type -/// which is split into two not necessarily identical pieces. -void DAGTypeLegalizer::GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT) { - if (!InVT.isVector()) { - LoVT = HiVT = TLI.getTypeToTransformTo(InVT); - } else { - MVT NewEltVT = InVT.getVectorElementType(); - unsigned NumElements = InVT.getVectorNumElements(); - if ((NumElements & (NumElements-1)) == 0) { // Simple power of two vector. - NumElements >>= 1; - LoVT = HiVT = MVT::getVectorVT(NewEltVT, NumElements); - } else { // Non-power-of-two vectors. - unsigned NewNumElts_Lo = 1 << Log2_32(NumElements); - unsigned NewNumElts_Hi = NumElements - NewNumElts_Lo; - LoVT = MVT::getVectorVT(NewEltVT, NewNumElts_Lo); - HiVT = MVT::getVectorVT(NewEltVT, NewNumElts_Hi); - } - } +/// SplitInteger - Return the lower and upper halves of Op's bits in a value +/// type half the size of Op's. +void DAGTypeLegalizer::SplitInteger(SDValue Op, + SDValue &Lo, SDValue &Hi) { + EVT HalfVT = EVT::getIntegerVT(*DAG.getContext(), + Op.getValueType().getSizeInBits()/2); + SplitInteger(Op, HalfVT, HalfVT, Lo, Hi); }