| //===- DAGISelMatcher.cpp - Representation of DAG pattern matcher ---------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DAGISelMatcher.h" |
| #include "CodeGenDAGPatterns.h" |
| #include "CodeGenTarget.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/TableGen/Record.h" |
| using namespace llvm; |
| |
| void Matcher::anchor() { } |
| |
| void Matcher::dump() const { |
| print(errs(), 0); |
| } |
| |
| void Matcher::print(raw_ostream &OS, unsigned indent) const { |
| printImpl(OS, indent); |
| if (Next) |
| return Next->print(OS, indent); |
| } |
| |
| void Matcher::printOne(raw_ostream &OS) const { |
| printImpl(OS, 0); |
| } |
| |
| /// unlinkNode - Unlink the specified node from this chain. If Other == this, |
| /// we unlink the next pointer and return it. Otherwise we unlink Other from |
| /// the list and return this. |
| Matcher *Matcher::unlinkNode(Matcher *Other) { |
| if (this == Other) |
| return takeNext(); |
| |
| // Scan until we find the predecessor of Other. |
| Matcher *Cur = this; |
| for (; Cur && Cur->getNext() != Other; Cur = Cur->getNext()) |
| /*empty*/; |
| |
| if (!Cur) return nullptr; |
| Cur->takeNext(); |
| Cur->setNext(Other->takeNext()); |
| return this; |
| } |
| |
| /// canMoveBefore - Return true if this matcher is the same as Other, or if |
| /// we can move this matcher past all of the nodes in-between Other and this |
| /// node. Other must be equal to or before this. |
| bool Matcher::canMoveBefore(const Matcher *Other) const { |
| for (;; Other = Other->getNext()) { |
| assert(Other && "Other didn't come before 'this'?"); |
| if (this == Other) return true; |
| |
| // We have to be able to move this node across the Other node. |
| if (!canMoveBeforeNode(Other)) |
| return false; |
| } |
| } |
| |
| /// canMoveBeforeNode - Return true if it is safe to move the current matcher |
| /// across the specified one. |
| bool Matcher::canMoveBeforeNode(const Matcher *Other) const { |
| // We can move simple predicates before record nodes. |
| if (isSimplePredicateNode()) |
| return Other->isSimplePredicateOrRecordNode(); |
| |
| // We can move record nodes across simple predicates. |
| if (isSimplePredicateOrRecordNode()) |
| return isSimplePredicateNode(); |
| |
| // We can't move record nodes across each other etc. |
| return false; |
| } |
| |
| |
| ScopeMatcher::~ScopeMatcher() { |
| for (Matcher *C : Children) |
| delete C; |
| } |
| |
| SwitchOpcodeMatcher::~SwitchOpcodeMatcher() { |
| for (auto &C : Cases) |
| delete C.second; |
| } |
| |
| SwitchTypeMatcher::~SwitchTypeMatcher() { |
| for (auto &C : Cases) |
| delete C.second; |
| } |
| |
| CheckPredicateMatcher::CheckPredicateMatcher( |
| const TreePredicateFn &pred, const SmallVectorImpl<unsigned> &Ops) |
| : Matcher(CheckPredicate), Pred(pred.getOrigPatFragRecord()), |
| Operands(Ops.begin(), Ops.end()) {} |
| |
| TreePredicateFn CheckPredicateMatcher::getPredicate() const { |
| return TreePredicateFn(Pred); |
| } |
| |
| unsigned CheckPredicateMatcher::getNumOperands() const { |
| return Operands.size(); |
| } |
| |
| unsigned CheckPredicateMatcher::getOperandNo(unsigned i) const { |
| assert(i < Operands.size()); |
| return Operands[i]; |
| } |
| |
| |
| // printImpl methods. |
| |
| void ScopeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "Scope\n"; |
| for (const Matcher *C : Children) { |
| if (!C) |
| OS.indent(indent+1) << "NULL POINTER\n"; |
| else |
| C->print(OS, indent+2); |
| } |
| } |
| |
| void RecordMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "Record\n"; |
| } |
| |
| void RecordChildMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "RecordChild: " << ChildNo << '\n'; |
| } |
| |
| void RecordMemRefMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "RecordMemRef\n"; |
| } |
| |
| void CaptureGlueInputMatcher::printImpl(raw_ostream &OS, unsigned indent) const{ |
| OS.indent(indent) << "CaptureGlueInput\n"; |
| } |
| |
| void MoveChildMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "MoveChild " << ChildNo << '\n'; |
| } |
| |
| void MoveParentMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "MoveParent\n"; |
| } |
| |
| void CheckSameMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckSame " << MatchNumber << '\n'; |
| } |
| |
| void CheckChildSameMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckChild" << ChildNo << "Same\n"; |
| } |
| |
| void CheckPatternPredicateMatcher:: |
| printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckPatternPredicate " << Predicate << '\n'; |
| } |
| |
| void CheckPredicateMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckPredicate " << getPredicate().getFnName() << '\n'; |
| } |
| |
| void CheckOpcodeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckOpcode " << Opcode.getEnumName() << '\n'; |
| } |
| |
| void SwitchOpcodeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "SwitchOpcode: {\n"; |
| for (const auto &C : Cases) { |
| OS.indent(indent) << "case " << C.first->getEnumName() << ":\n"; |
| C.second->print(OS, indent+2); |
| } |
| OS.indent(indent) << "}\n"; |
| } |
| |
| |
| void CheckTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckType " << getEnumName(Type) << ", ResNo=" |
| << ResNo << '\n'; |
| } |
| |
| void SwitchTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "SwitchType: {\n"; |
| for (const auto &C : Cases) { |
| OS.indent(indent) << "case " << getEnumName(C.first) << ":\n"; |
| C.second->print(OS, indent+2); |
| } |
| OS.indent(indent) << "}\n"; |
| } |
| |
| void CheckChildTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckChildType " << ChildNo << " " |
| << getEnumName(Type) << '\n'; |
| } |
| |
| |
| void CheckIntegerMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckInteger " << Value << '\n'; |
| } |
| |
| void CheckChildIntegerMatcher::printImpl(raw_ostream &OS, |
| unsigned indent) const { |
| OS.indent(indent) << "CheckChildInteger " << ChildNo << " " << Value << '\n'; |
| } |
| |
| void CheckCondCodeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckCondCode ISD::" << CondCodeName << '\n'; |
| } |
| |
| void CheckChild2CondCodeMatcher::printImpl(raw_ostream &OS, |
| unsigned indent) const { |
| OS.indent(indent) << "CheckChild2CondCode ISD::" << CondCodeName << '\n'; |
| } |
| |
| void CheckValueTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckValueType MVT::" << TypeName << '\n'; |
| } |
| |
| void CheckComplexPatMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckComplexPat " << Pattern.getSelectFunc() << '\n'; |
| } |
| |
| void CheckAndImmMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckAndImm " << Value << '\n'; |
| } |
| |
| void CheckOrImmMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CheckOrImm " << Value << '\n'; |
| } |
| |
| void CheckFoldableChainNodeMatcher::printImpl(raw_ostream &OS, |
| unsigned indent) const { |
| OS.indent(indent) << "CheckFoldableChainNode\n"; |
| } |
| |
| void CheckImmAllOnesVMatcher::printImpl(raw_ostream &OS, |
| unsigned indent) const { |
| OS.indent(indent) << "CheckAllOnesV\n"; |
| } |
| |
| void CheckImmAllZerosVMatcher::printImpl(raw_ostream &OS, |
| unsigned indent) const { |
| OS.indent(indent) << "CheckAllZerosV\n"; |
| } |
| |
| void EmitIntegerMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitInteger " << Val << " VT=" << getEnumName(VT) |
| << '\n'; |
| } |
| |
| void EmitStringIntegerMatcher:: |
| printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitStringInteger " << Val << " VT=" << getEnumName(VT) |
| << '\n'; |
| } |
| |
| void EmitRegisterMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitRegister "; |
| if (Reg) |
| OS << Reg->getName(); |
| else |
| OS << "zero_reg"; |
| OS << " VT=" << getEnumName(VT) << '\n'; |
| } |
| |
| void EmitConvertToTargetMatcher:: |
| printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitConvertToTarget " << Slot << '\n'; |
| } |
| |
| void EmitMergeInputChainsMatcher:: |
| printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitMergeInputChains <todo: args>\n"; |
| } |
| |
| void EmitCopyToRegMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitCopyToReg <todo: args>\n"; |
| } |
| |
| void EmitNodeXFormMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "EmitNodeXForm " << NodeXForm->getName() |
| << " Slot=" << Slot << '\n'; |
| } |
| |
| |
| void EmitNodeMatcherCommon::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent); |
| OS << (isa<MorphNodeToMatcher>(this) ? "MorphNodeTo: " : "EmitNode: ") |
| << OpcodeName << ": <todo flags> "; |
| |
| for (unsigned i = 0, e = VTs.size(); i != e; ++i) |
| OS << ' ' << getEnumName(VTs[i]); |
| OS << '('; |
| for (unsigned i = 0, e = Operands.size(); i != e; ++i) |
| OS << Operands[i] << ' '; |
| OS << ")\n"; |
| } |
| |
| void CompleteMatchMatcher::printImpl(raw_ostream &OS, unsigned indent) const { |
| OS.indent(indent) << "CompleteMatch <todo args>\n"; |
| OS.indent(indent) << "Src = " << *Pattern.getSrcPattern() << "\n"; |
| OS.indent(indent) << "Dst = " << *Pattern.getDstPattern() << "\n"; |
| } |
| |
| bool CheckOpcodeMatcher::isEqualImpl(const Matcher *M) const { |
| // Note: pointer equality isn't enough here, we have to check the enum names |
| // to ensure that the nodes are for the same opcode. |
| return cast<CheckOpcodeMatcher>(M)->Opcode.getEnumName() == |
| Opcode.getEnumName(); |
| } |
| |
| bool EmitNodeMatcherCommon::isEqualImpl(const Matcher *m) const { |
| const EmitNodeMatcherCommon *M = cast<EmitNodeMatcherCommon>(m); |
| return M->OpcodeName == OpcodeName && M->VTs == VTs && |
| M->Operands == Operands && M->HasChain == HasChain && |
| M->HasInGlue == HasInGlue && M->HasOutGlue == HasOutGlue && |
| M->HasMemRefs == HasMemRefs && |
| M->NumFixedArityOperands == NumFixedArityOperands; |
| } |
| |
| void EmitNodeMatcher::anchor() { } |
| |
| void MorphNodeToMatcher::anchor() { } |
| |
| // isContradictoryImpl Implementations. |
| |
| static bool TypesAreContradictory(MVT::SimpleValueType T1, |
| MVT::SimpleValueType T2) { |
| // If the two types are the same, then they are the same, so they don't |
| // contradict. |
| if (T1 == T2) return false; |
| |
| // If either type is about iPtr, then they don't conflict unless the other |
| // one is not a scalar integer type. |
| if (T1 == MVT::iPTR) |
| return !MVT(T2).isInteger() || MVT(T2).isVector(); |
| |
| if (T2 == MVT::iPTR) |
| return !MVT(T1).isInteger() || MVT(T1).isVector(); |
| |
| // Otherwise, they are two different non-iPTR types, they conflict. |
| return true; |
| } |
| |
| bool CheckOpcodeMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckOpcodeMatcher *COM = dyn_cast<CheckOpcodeMatcher>(M)) { |
| // One node can't have two different opcodes! |
| // Note: pointer equality isn't enough here, we have to check the enum names |
| // to ensure that the nodes are for the same opcode. |
| return COM->getOpcode().getEnumName() != getOpcode().getEnumName(); |
| } |
| |
| // If the node has a known type, and if the type we're checking for is |
| // different, then we know they contradict. For example, a check for |
| // ISD::STORE will never be true at the same time a check for Type i32 is. |
| if (const CheckTypeMatcher *CT = dyn_cast<CheckTypeMatcher>(M)) { |
| // If checking for a result the opcode doesn't have, it can't match. |
| if (CT->getResNo() >= getOpcode().getNumResults()) |
| return true; |
| |
| MVT::SimpleValueType NodeType = getOpcode().getKnownType(CT->getResNo()); |
| if (NodeType != MVT::Other) |
| return TypesAreContradictory(NodeType, CT->getType()); |
| } |
| |
| return false; |
| } |
| |
| bool CheckTypeMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckTypeMatcher *CT = dyn_cast<CheckTypeMatcher>(M)) |
| return TypesAreContradictory(getType(), CT->getType()); |
| return false; |
| } |
| |
| bool CheckChildTypeMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckChildTypeMatcher *CC = dyn_cast<CheckChildTypeMatcher>(M)) { |
| // If the two checks are about different nodes, we don't know if they |
| // conflict! |
| if (CC->getChildNo() != getChildNo()) |
| return false; |
| |
| return TypesAreContradictory(getType(), CC->getType()); |
| } |
| return false; |
| } |
| |
| bool CheckIntegerMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckIntegerMatcher *CIM = dyn_cast<CheckIntegerMatcher>(M)) |
| return CIM->getValue() != getValue(); |
| return false; |
| } |
| |
| bool CheckChildIntegerMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckChildIntegerMatcher *CCIM = dyn_cast<CheckChildIntegerMatcher>(M)) { |
| // If the two checks are about different nodes, we don't know if they |
| // conflict! |
| if (CCIM->getChildNo() != getChildNo()) |
| return false; |
| |
| return CCIM->getValue() != getValue(); |
| } |
| return false; |
| } |
| |
| bool CheckValueTypeMatcher::isContradictoryImpl(const Matcher *M) const { |
| if (const CheckValueTypeMatcher *CVT = dyn_cast<CheckValueTypeMatcher>(M)) |
| return CVT->getTypeName() != getTypeName(); |
| return false; |
| } |
| |
| bool CheckImmAllOnesVMatcher::isContradictoryImpl(const Matcher *M) const { |
| // AllZeros is contradictory. |
| return isa<CheckImmAllZerosVMatcher>(M); |
| } |
| |
| bool CheckImmAllZerosVMatcher::isContradictoryImpl(const Matcher *M) const { |
| // AllOnes is contradictory. |
| return isa<CheckImmAllOnesVMatcher>(M); |
| } |