- PFsByName.insert(std::make_pair(I->first->getName(), *I));
-
-
- for (PFsByNameTy::iterator I = PFsByName.begin(), E = PFsByName.end();
- I != E; ++I) {
- Record *PatFragRecord = I->second.first;// Record that derives from PatFrag.
- TreePattern *P = I->second.second;
-
- // If there is a code init for this fragment, emit the predicate code.
- std::string Code = PatFragRecord->getValueAsCode("Predicate");
- if (Code.empty()) continue;
-
- if (P->getOnlyTree()->isLeaf())
- OS << "inline bool Predicate_" << PatFragRecord->getName()
- << "(SDNode *N) {\n";
- else {
- std::string ClassName =
- CGP.getSDNodeInfo(P->getOnlyTree()->getOperator()).getSDClassName();
- const char *C2 = ClassName == "SDNode" ? "N" : "inN";
-
- OS << "inline bool Predicate_" << PatFragRecord->getName()
- << "(SDNode *" << C2 << ") {\n";
- if (ClassName != "SDNode")
- OS << " " << ClassName << " *N = cast<" << ClassName << ">(inN);\n";
- }
- OS << Code << "\n}\n";
- }
-
- OS << "\n\n";
-}
-
-
-//===----------------------------------------------------------------------===//
-// PatternCodeEmitter implementation.
-//
-class PatternCodeEmitter {
-private:
- CodeGenDAGPatterns &CGP;
-
- // Predicates.
- std::string PredicateCheck;
- // Pattern cost.
- unsigned Cost;
- // Instruction selector pattern.
- TreePatternNode *Pattern;
- // Matched instruction.
- TreePatternNode *Instruction;
-
- // Node to name mapping
- std::map<std::string, std::string> VariableMap;
- // Node to operator mapping
- std::map<std::string, Record*> OperatorMap;
- // Name of the folded node which produces a flag.
- std::pair<std::string, unsigned> FoldedFlag;
- // Names of all the folded nodes which produce chains.
- std::vector<std::pair<std::string, unsigned> > FoldedChains;
- // Original input chain(s).
- std::vector<std::pair<std::string, std::string> > OrigChains;
- std::set<std::string> Duplicates;
-
- /// LSI - Load/Store information.
- /// Save loads/stores matched by a pattern, and generate a MemOperandSDNode
- /// for each memory access. This facilitates the use of AliasAnalysis in
- /// the backend.
- std::vector<std::string> LSI;
-
- /// GeneratedCode - This is the buffer that we emit code to. The first int
- /// indicates whether this is an exit predicate (something that should be
- /// tested, and if true, the match fails) [when 1], or normal code to emit
- /// [when 0], or initialization code to emit [when 2].
- std::vector<std::pair<unsigned, std::string> > &GeneratedCode;
- /// GeneratedDecl - This is the set of all SDValue declarations needed for
- /// the set of patterns for each top-level opcode.
- std::set<std::string> &GeneratedDecl;
- /// TargetOpcodes - The target specific opcodes used by the resulting
- /// instructions.
- std::vector<std::string> &TargetOpcodes;
- std::vector<std::string> &TargetVTs;
- /// OutputIsVariadic - Records whether the instruction output pattern uses
- /// variable_ops. This requires that the Emit function be passed an
- /// additional argument to indicate where the input varargs operands
- /// begin.
- bool &OutputIsVariadic;
- /// NumInputRootOps - Records the number of operands the root node of the
- /// input pattern has. This information is used in the generated code to
- /// pass to Emit functions when variable_ops processing is needed.
- unsigned &NumInputRootOps;
-
- std::string ChainName;
- unsigned TmpNo;
- unsigned OpcNo;
- unsigned VTNo;
-
- void emitCheck(const std::string &S) {
- if (!S.empty())
- GeneratedCode.push_back(std::make_pair(1, S));
- }
- void emitCode(const std::string &S) {
- if (!S.empty())
- GeneratedCode.push_back(std::make_pair(0, S));
- }
- void emitInit(const std::string &S) {
- if (!S.empty())
- GeneratedCode.push_back(std::make_pair(2, S));
- }
- void emitDecl(const std::string &S) {
- assert(!S.empty() && "Invalid declaration");
- GeneratedDecl.insert(S);
- }
- void emitOpcode(const std::string &Opc) {
- TargetOpcodes.push_back(Opc);
- OpcNo++;
- }
- void emitVT(const std::string &VT) {
- TargetVTs.push_back(VT);
- VTNo++;
- }
-public:
- PatternCodeEmitter(CodeGenDAGPatterns &cgp, std::string predcheck,
- TreePatternNode *pattern, TreePatternNode *instr,
- std::vector<std::pair<unsigned, std::string> > &gc,
- std::set<std::string> &gd,
- std::vector<std::string> &to,
- std::vector<std::string> &tv,
- bool &oiv,
- unsigned &niro)
- : CGP(cgp), PredicateCheck(predcheck), Pattern(pattern), Instruction(instr),
- GeneratedCode(gc), GeneratedDecl(gd),
- TargetOpcodes(to), TargetVTs(tv),
- OutputIsVariadic(oiv), NumInputRootOps(niro),
- TmpNo(0), OpcNo(0), VTNo(0) {}
-
- /// EmitMatchCode - Emit a matcher for N, going to the label for PatternNo
- /// if the match fails. At this point, we already know that the opcode for N
- /// matches, and the SDNode for the result has the RootName specified name.
- void EmitMatchCode(TreePatternNode *N, TreePatternNode *P,
- const std::string &RootName, const std::string &ChainSuffix,
- bool &FoundChain) {
-
- // Save loads/stores matched by a pattern.
- if (!N->isLeaf() && N->getName().empty()) {
- if (NodeHasProperty(N, SDNPMemOperand, CGP))
- LSI.push_back(RootName);
- }
-
- bool isRoot = (P == NULL);
- // Emit instruction predicates. Each predicate is just a string for now.
- if (isRoot) {
- // Record input varargs info.
- NumInputRootOps = N->getNumChildren();
-
- if (DisablePatternForFastISel(N, CGP))
- emitCheck("!Fast");
-
- emitCheck(PredicateCheck);
- }
-
- if (N->isLeaf()) {
- if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
- emitCheck("cast<ConstantSDNode>(" + RootName +
- ")->getSExtValue() == INT64_C(" +
- itostr(II->getValue()) + ")");
- return;
- } else if (!NodeIsComplexPattern(N)) {
- assert(0 && "Cannot match this as a leaf value!");
- abort();
- }
- }
-
- // If this node has a name associated with it, capture it in VariableMap. If
- // we already saw this in the pattern, emit code to verify dagness.
- if (!N->getName().empty()) {
- std::string &VarMapEntry = VariableMap[N->getName()];
- if (VarMapEntry.empty()) {
- VarMapEntry = RootName;
- } else {
- // If we get here, this is a second reference to a specific name. Since
- // we already have checked that the first reference is valid, we don't
- // have to recursively match it, just check that it's the same as the
- // previously named thing.
- emitCheck(VarMapEntry + " == " + RootName);
- return;
- }
-
- if (!N->isLeaf())
- OperatorMap[N->getName()] = N->getOperator();
- }
-
-
- // Emit code to load the child nodes and match their contents recursively.
- unsigned OpNo = 0;
- bool NodeHasChain = NodeHasProperty (N, SDNPHasChain, CGP);
- bool HasChain = PatternHasProperty(N, SDNPHasChain, CGP);
- bool EmittedUseCheck = false;
- if (HasChain) {
- if (NodeHasChain)
- OpNo = 1;
- if (!isRoot) {
- // Multiple uses of actual result?
- emitCheck(RootName + ".hasOneUse()");
- EmittedUseCheck = true;
- if (NodeHasChain) {
- // If the immediate use can somehow reach this node through another
- // path, then can't fold it either or it will create a cycle.
- // e.g. In the following diagram, XX can reach ld through YY. If
- // ld is folded into XX, then YY is both a predecessor and a successor
- // of XX.
- //
- // [ld]
- // ^ ^
- // | |
- // / \---
- // / [YY]
- // | ^
- // [XX]-------|
- bool NeedCheck = P != Pattern;
- if (!NeedCheck) {
- const SDNodeInfo &PInfo = CGP.getSDNodeInfo(P->getOperator());
- NeedCheck =
- P->getOperator() == CGP.get_intrinsic_void_sdnode() ||
- P->getOperator() == CGP.get_intrinsic_w_chain_sdnode() ||
- P->getOperator() == CGP.get_intrinsic_wo_chain_sdnode() ||
- PInfo.getNumOperands() > 1 ||
- PInfo.hasProperty(SDNPHasChain) ||
- PInfo.hasProperty(SDNPInFlag) ||
- PInfo.hasProperty(SDNPOptInFlag);
- }
-
- if (NeedCheck) {
- std::string ParentName(RootName.begin(), RootName.end()-1);
- emitCheck("IsLegalAndProfitableToFold(" + RootName +
- ".getNode(), " + ParentName + ".getNode(), N.getNode())");
- }
- }
- }
-
- if (NodeHasChain) {
- if (FoundChain) {
- emitCheck("(" + ChainName + ".getNode() == " + RootName + ".getNode() || "
- "IsChainCompatible(" + ChainName + ".getNode(), " +
- RootName + ".getNode()))");
- OrigChains.push_back(std::make_pair(ChainName, RootName));
- } else
- FoundChain = true;
- ChainName = "Chain" + ChainSuffix;
- emitInit("SDValue " + ChainName + " = " + RootName +
- ".getOperand(0);");
- }
- }
-
- // Don't fold any node which reads or writes a flag and has multiple uses.
- // FIXME: We really need to separate the concepts of flag and "glue". Those
- // real flag results, e.g. X86CMP output, can have multiple uses.
- // FIXME: If the optional incoming flag does not exist. Then it is ok to
- // fold it.
- if (!isRoot &&
- (PatternHasProperty(N, SDNPInFlag, CGP) ||
- PatternHasProperty(N, SDNPOptInFlag, CGP) ||
- PatternHasProperty(N, SDNPOutFlag, CGP))) {
- if (!EmittedUseCheck) {
- // Multiple uses of actual result?
- emitCheck(RootName + ".hasOneUse()");
- }
- }
-
- // If there are node predicates for this, emit the calls.
- for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
- emitCheck(N->getPredicateFns()[i] + "(" + RootName + ".getNode())");
-
- // If this is an 'and R, 1234' where the operation is AND/OR and the RHS is
- // a constant without a predicate fn that has more that one bit set, handle
- // this as a special case. This is usually for targets that have special
- // handling of certain large constants (e.g. alpha with it's 8/16/32-bit
- // handling stuff). Using these instructions is often far more efficient
- // than materializing the constant. Unfortunately, both the instcombiner
- // and the dag combiner can often infer that bits are dead, and thus drop
- // them from the mask in the dag. For example, it might turn 'AND X, 255'
- // into 'AND X, 254' if it knows the low bit is set. Emit code that checks
- // to handle this.
- if (!N->isLeaf() &&
- (N->getOperator()->getName() == "and" ||
- N->getOperator()->getName() == "or") &&
- N->getChild(1)->isLeaf() &&
- N->getChild(1)->getPredicateFns().empty()) {
- if (IntInit *II = dynamic_cast<IntInit*>(N->getChild(1)->getLeafValue())) {
- if (!isPowerOf2_32(II->getValue())) { // Don't bother with single bits.
- emitInit("SDValue " + RootName + "0" + " = " +
- RootName + ".getOperand(" + utostr(0) + ");");
- emitInit("SDValue " + RootName + "1" + " = " +
- RootName + ".getOperand(" + utostr(1) + ");");
-
- unsigned NTmp = TmpNo++;
- emitCode("ConstantSDNode *Tmp" + utostr(NTmp) +
- " = dyn_cast<ConstantSDNode>(" + RootName + "1);");
- emitCheck("Tmp" + utostr(NTmp));
- const char *MaskPredicate = N->getOperator()->getName() == "or"
- ? "CheckOrMask(" : "CheckAndMask(";
- emitCheck(MaskPredicate + RootName + "0, Tmp" + utostr(NTmp) +
- ", INT64_C(" + itostr(II->getValue()) + "))");
-
- EmitChildMatchCode(N->getChild(0), N, RootName + utostr(0), RootName,
- ChainSuffix + utostr(0), FoundChain);
- return;
- }
- }
- }
-
- for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
- emitInit("SDValue " + RootName + utostr(OpNo) + " = " +
- RootName + ".getOperand(" +utostr(OpNo) + ");");
-
- EmitChildMatchCode(N->getChild(i), N, RootName + utostr(OpNo), RootName,
- ChainSuffix + utostr(OpNo), FoundChain);
- }
-
- // Handle cases when root is a complex pattern.
- const ComplexPattern *CP;
- if (isRoot && N->isLeaf() && (CP = NodeGetComplexPattern(N, CGP))) {
- std::string Fn = CP->getSelectFunc();
- unsigned NumOps = CP->getNumOperands();
- for (unsigned i = 0; i < NumOps; ++i) {
- emitDecl("CPTmp" + RootName + "_" + utostr(i));
- emitCode("SDValue CPTmp" + RootName + "_" + utostr(i) + ";");
- }
- if (CP->hasProperty(SDNPHasChain)) {
- emitDecl("CPInChain");
- emitDecl("Chain" + ChainSuffix);
- emitCode("SDValue CPInChain;");
- emitCode("SDValue Chain" + ChainSuffix + ";");
- }
-
- std::string Code = Fn + "(" + RootName + ", " + RootName;
- for (unsigned i = 0; i < NumOps; i++)
- Code += ", CPTmp" + RootName + "_" + utostr(i);
- if (CP->hasProperty(SDNPHasChain)) {
- ChainName = "Chain" + ChainSuffix;
- Code += ", CPInChain, Chain" + ChainSuffix;
- }
- emitCheck(Code + ")");
- }
- }
-
- void EmitChildMatchCode(TreePatternNode *Child, TreePatternNode *Parent,
- const std::string &RootName,
- const std::string &ParentRootName,
- const std::string &ChainSuffix, bool &FoundChain) {
- if (!Child->isLeaf()) {
- // If it's not a leaf, recursively match.
- const SDNodeInfo &CInfo = CGP.getSDNodeInfo(Child->getOperator());
- emitCheck(RootName + ".getOpcode() == " +
- CInfo.getEnumName());
- EmitMatchCode(Child, Parent, RootName, ChainSuffix, FoundChain);
- bool HasChain = false;
- if (NodeHasProperty(Child, SDNPHasChain, CGP)) {
- HasChain = true;
- FoldedChains.push_back(std::make_pair(RootName, CInfo.getNumResults()));
- }
- if (NodeHasProperty(Child, SDNPOutFlag, CGP)) {
- assert(FoldedFlag.first == "" && FoldedFlag.second == 0 &&
- "Pattern folded multiple nodes which produce flags?");
- FoldedFlag = std::make_pair(RootName,
- CInfo.getNumResults() + (unsigned)HasChain);
- }
- } else {
- // If this child has a name associated with it, capture it in VarMap. If
- // we already saw this in the pattern, emit code to verify dagness.
- if (!Child->getName().empty()) {
- std::string &VarMapEntry = VariableMap[Child->getName()];
- if (VarMapEntry.empty()) {
- VarMapEntry = RootName;
- } else {
- // If we get here, this is a second reference to a specific name.
- // Since we already have checked that the first reference is valid,
- // we don't have to recursively match it, just check that it's the
- // same as the previously named thing.
- emitCheck(VarMapEntry + " == " + RootName);
- Duplicates.insert(RootName);
- return;
- }
- }
-
- // Handle leaves of various types.
- if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
- Record *LeafRec = DI->getDef();
- if (LeafRec->isSubClassOf("RegisterClass") ||
- LeafRec->getName() == "ptr_rc") {
- // Handle register references. Nothing to do here.
- } else if (LeafRec->isSubClassOf("Register")) {
- // Handle register references.
- } else if (LeafRec->isSubClassOf("ComplexPattern")) {
- // Handle complex pattern.
- const ComplexPattern *CP = NodeGetComplexPattern(Child, CGP);
- std::string Fn = CP->getSelectFunc();
- unsigned NumOps = CP->getNumOperands();
- for (unsigned i = 0; i < NumOps; ++i) {
- emitDecl("CPTmp" + RootName + "_" + utostr(i));
- emitCode("SDValue CPTmp" + RootName + "_" + utostr(i) + ";");
- }
- if (CP->hasProperty(SDNPHasChain)) {
- const SDNodeInfo &PInfo = CGP.getSDNodeInfo(Parent->getOperator());
- FoldedChains.push_back(std::make_pair("CPInChain",
- PInfo.getNumResults()));
- ChainName = "Chain" + ChainSuffix;
- emitDecl("CPInChain");
- emitDecl(ChainName);
- emitCode("SDValue CPInChain;");
- emitCode("SDValue " + ChainName + ";");
- }
-
- std::string Code = Fn + "(";
- if (CP->hasAttribute(CPAttrParentAsRoot)) {
- Code += ParentRootName + ", ";
- } else {
- Code += "N, ";
- }
- if (CP->hasProperty(SDNPHasChain)) {
- std::string ParentName(RootName.begin(), RootName.end()-1);
- Code += ParentName + ", ";
- }
- Code += RootName;
- for (unsigned i = 0; i < NumOps; i++)
- Code += ", CPTmp" + RootName + "_" + utostr(i);
- if (CP->hasProperty(SDNPHasChain))
- Code += ", CPInChain, Chain" + ChainSuffix;
- emitCheck(Code + ")");
- } else if (LeafRec->getName() == "srcvalue") {
- // Place holder for SRCVALUE nodes. Nothing to do here.
- } else if (LeafRec->isSubClassOf("ValueType")) {
- // Make sure this is the specified value type.
- emitCheck("cast<VTSDNode>(" + RootName +
- ")->getVT() == MVT::" + LeafRec->getName());
- } else if (LeafRec->isSubClassOf("CondCode")) {
- // Make sure this is the specified cond code.
- emitCheck("cast<CondCodeSDNode>(" + RootName +
- ")->get() == ISD::" + LeafRec->getName());
- } else {
-#ifndef NDEBUG
- Child->dump();
- cerr << " ";
-#endif
- assert(0 && "Unknown leaf type!");
- }
-
- // If there are node predicates for this, emit the calls.
- for (unsigned i = 0, e = Child->getPredicateFns().size(); i != e; ++i)
- emitCheck(Child->getPredicateFns()[i] + "(" + RootName +
- ".getNode())");
- } else if (IntInit *II =
- dynamic_cast<IntInit*>(Child->getLeafValue())) {
- unsigned NTmp = TmpNo++;
- emitCode("ConstantSDNode *Tmp"+ utostr(NTmp) +
- " = dyn_cast<ConstantSDNode>("+
- RootName + ");");
- emitCheck("Tmp" + utostr(NTmp));
- unsigned CTmp = TmpNo++;
- emitCode("int64_t CN"+ utostr(CTmp) +
- " = Tmp" + utostr(NTmp) + "->getSExtValue();");
- emitCheck("CN" + utostr(CTmp) + " == "
- "INT64_C(" +itostr(II->getValue()) + ")");
- } else {
-#ifndef NDEBUG
- Child->dump();
-#endif
- assert(0 && "Unknown leaf type!");
- }
- }
- }
-
- /// EmitResultCode - Emit the action for a pattern. Now that it has matched
- /// we actually have to build a DAG!
- std::vector<std::string>
- EmitResultCode(TreePatternNode *N, std::vector<Record*> DstRegs,
- bool InFlagDecled, bool ResNodeDecled,
- bool LikeLeaf = false, bool isRoot = false) {
- // List of arguments of getTargetNode() or SelectNodeTo().
- std::vector<std::string> NodeOps;
- // This is something selected from the pattern we matched.
- if (!N->getName().empty()) {
- const std::string &VarName = N->getName();
- std::string Val = VariableMap[VarName];
- bool ModifiedVal = false;
- if (Val.empty()) {
- cerr << "Variable '" << VarName << " referenced but not defined "
- << "and not caught earlier!\n";
- abort();
- }
- if (Val[0] == 'T' && Val[1] == 'm' && Val[2] == 'p') {
- // Already selected this operand, just return the tmpval.
- NodeOps.push_back(Val);
- return NodeOps;
- }
-
- const ComplexPattern *CP;
- unsigned ResNo = TmpNo++;
- if (!N->isLeaf() && N->getOperator()->getName() == "imm") {
- assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
- std::string CastType;
- std::string TmpVar = "Tmp" + utostr(ResNo);
- switch (N->getTypeNum(0)) {
- default:
- cerr << "Cannot handle " << getEnumName(N->getTypeNum(0))
- << " type as an immediate constant. Aborting\n";
- abort();
- case MVT::i1: CastType = "bool"; break;
- case MVT::i8: CastType = "unsigned char"; break;
- case MVT::i16: CastType = "unsigned short"; break;
- case MVT::i32: CastType = "unsigned"; break;
- case MVT::i64: CastType = "uint64_t"; break;
- }
- emitCode("SDValue " + TmpVar +
- " = CurDAG->getTargetConstant(((" + CastType +
- ") cast<ConstantSDNode>(" + Val + ")->getZExtValue()), " +
- getEnumName(N->getTypeNum(0)) + ");");
- // Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
- // value if used multiple times by this pattern result.
- Val = TmpVar;
- ModifiedVal = true;
- NodeOps.push_back(Val);
- } else if (!N->isLeaf() && N->getOperator()->getName() == "fpimm") {
- assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
- std::string TmpVar = "Tmp" + utostr(ResNo);
- emitCode("SDValue " + TmpVar +
- " = CurDAG->getTargetConstantFP(*cast<ConstantFPSDNode>(" +
- Val + ")->getConstantFPValue(), cast<ConstantFPSDNode>(" +
- Val + ")->getValueType(0));");
- // Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
- // value if used multiple times by this pattern result.
- Val = TmpVar;
- ModifiedVal = true;
- NodeOps.push_back(Val);
- } else if (!N->isLeaf() && N->getOperator()->getName() == "texternalsym"){
- Record *Op = OperatorMap[N->getName()];
- // Transform ExternalSymbol to TargetExternalSymbol
- if (Op && Op->getName() == "externalsym") {
- std::string TmpVar = "Tmp"+utostr(ResNo);
- emitCode("SDValue " + TmpVar + " = CurDAG->getTarget"
- "ExternalSymbol(cast<ExternalSymbolSDNode>(" +
- Val + ")->getSymbol(), " +
- getEnumName(N->getTypeNum(0)) + ");");
- // Add Tmp<ResNo> to VariableMap, so that we don't multiply select
- // this value if used multiple times by this pattern result.
- Val = TmpVar;
- ModifiedVal = true;
- }
- NodeOps.push_back(Val);
- } else if (!N->isLeaf() && (N->getOperator()->getName() == "tglobaladdr"
- || N->getOperator()->getName() == "tglobaltlsaddr")) {
- Record *Op = OperatorMap[N->getName()];
- // Transform GlobalAddress to TargetGlobalAddress
- if (Op && (Op->getName() == "globaladdr" ||
- Op->getName() == "globaltlsaddr")) {
- std::string TmpVar = "Tmp" + utostr(ResNo);
- emitCode("SDValue " + TmpVar + " = CurDAG->getTarget"
- "GlobalAddress(cast<GlobalAddressSDNode>(" + Val +
- ")->getGlobal(), " + getEnumName(N->getTypeNum(0)) +
- ");");
- // Add Tmp<ResNo> to VariableMap, so that we don't multiply select
- // this value if used multiple times by this pattern result.
- Val = TmpVar;
- ModifiedVal = true;
- }
- NodeOps.push_back(Val);
- } else if (!N->isLeaf()
- && (N->getOperator()->getName() == "texternalsym"
- || N->getOperator()->getName() == "tconstpool")) {
- // Do not rewrite the variable name, since we don't generate a new
- // temporary.
- NodeOps.push_back(Val);
- } else if (N->isLeaf() && (CP = NodeGetComplexPattern(N, CGP))) {
- for (unsigned i = 0; i < CP->getNumOperands(); ++i) {
- NodeOps.push_back("CPTmp" + Val + "_" + utostr(i));
- }
- } else {
- // This node, probably wrapped in a SDNodeXForm, behaves like a leaf
- // node even if it isn't one. Don't select it.
- if (!LikeLeaf) {
- if (isRoot && N->isLeaf()) {
- emitCode("ReplaceUses(N, " + Val + ");");
- emitCode("return NULL;");
- }
- }
- NodeOps.push_back(Val);
- }
-
- if (ModifiedVal) {
- VariableMap[VarName] = Val;
- }
- return NodeOps;
- }
- if (N->isLeaf()) {
- // If this is an explicit register reference, handle it.
- if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
- unsigned ResNo = TmpNo++;
- if (DI->getDef()->isSubClassOf("Register")) {
- emitCode("SDValue Tmp" + utostr(ResNo) + " = CurDAG->getRegister(" +
- getQualifiedName(DI->getDef()) + ", " +
- getEnumName(N->getTypeNum(0)) + ");");
- NodeOps.push_back("Tmp" + utostr(ResNo));
- return NodeOps;
- } else if (DI->getDef()->getName() == "zero_reg") {
- emitCode("SDValue Tmp" + utostr(ResNo) +
- " = CurDAG->getRegister(0, " +
- getEnumName(N->getTypeNum(0)) + ");");
- NodeOps.push_back("Tmp" + utostr(ResNo));
- return NodeOps;
- }
- } else if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
- unsigned ResNo = TmpNo++;
- assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
- emitCode("SDValue Tmp" + utostr(ResNo) +
- " = CurDAG->getTargetConstant(0x" + itohexstr(II->getValue()) +
- "ULL, " + getEnumName(N->getTypeNum(0)) + ");");
- NodeOps.push_back("Tmp" + utostr(ResNo));
- return NodeOps;
- }
-
-#ifndef NDEBUG
- N->dump();
-#endif
- assert(0 && "Unknown leaf type!");
- return NodeOps;
- }
-
- Record *Op = N->getOperator();
- if (Op->isSubClassOf("Instruction")) {
- const CodeGenTarget &CGT = CGP.getTargetInfo();
- CodeGenInstruction &II = CGT.getInstruction(Op->getName());
- const DAGInstruction &Inst = CGP.getInstruction(Op);
- const TreePattern *InstPat = Inst.getPattern();
- // FIXME: Assume actual pattern comes before "implicit".
- TreePatternNode *InstPatNode =
- isRoot ? (InstPat ? InstPat->getTree(0) : Pattern)
- : (InstPat ? InstPat->getTree(0) : NULL);
- if (InstPatNode && !InstPatNode->isLeaf() &&
- InstPatNode->getOperator()->getName() == "set") {
- InstPatNode = InstPatNode->getChild(InstPatNode->getNumChildren()-1);
- }
- bool IsVariadic = isRoot && II.isVariadic;
- // FIXME: fix how we deal with physical register operands.
- bool HasImpInputs = isRoot && Inst.getNumImpOperands() > 0;
- bool HasImpResults = isRoot && DstRegs.size() > 0;
- bool NodeHasOptInFlag = isRoot &&
- PatternHasProperty(Pattern, SDNPOptInFlag, CGP);
- bool NodeHasInFlag = isRoot &&
- PatternHasProperty(Pattern, SDNPInFlag, CGP);
- bool NodeHasOutFlag = isRoot &&
- PatternHasProperty(Pattern, SDNPOutFlag, CGP);
- bool NodeHasChain = InstPatNode &&
- PatternHasProperty(InstPatNode, SDNPHasChain, CGP);
- bool InputHasChain = isRoot &&
- NodeHasProperty(Pattern, SDNPHasChain, CGP);
- unsigned NumResults = Inst.getNumResults();
- unsigned NumDstRegs = HasImpResults ? DstRegs.size() : 0;
-
- // Record output varargs info.
- OutputIsVariadic = IsVariadic;
-
- if (NodeHasOptInFlag) {
- emitCode("bool HasInFlag = "
- "(N.getOperand(N.getNumOperands()-1).getValueType() == MVT::Flag);");
- }
- if (IsVariadic)
- emitCode("SmallVector<SDValue, 8> Ops" + utostr(OpcNo) + ";");
-
- // How many results is this pattern expected to produce?
- unsigned NumPatResults = 0;
- for (unsigned i = 0, e = Pattern->getExtTypes().size(); i != e; i++) {
- MVT::SimpleValueType VT = Pattern->getTypeNum(i);
- if (VT != MVT::isVoid && VT != MVT::Flag)
- NumPatResults++;
- }
-
- if (OrigChains.size() > 0) {
- // The original input chain is being ignored. If it is not just
- // pointing to the op that's being folded, we should create a
- // TokenFactor with it and the chain of the folded op as the new chain.
- // We could potentially be doing multiple levels of folding, in that
- // case, the TokenFactor can have more operands.
- emitCode("SmallVector<SDValue, 8> InChains;");
- for (unsigned i = 0, e = OrigChains.size(); i < e; ++i) {
- emitCode("if (" + OrigChains[i].first + ".getNode() != " +
- OrigChains[i].second + ".getNode()) {");
- emitCode(" InChains.push_back(" + OrigChains[i].first + ");");
- emitCode("}");
- }
- emitCode("InChains.push_back(" + ChainName + ");");
- emitCode(ChainName + " = CurDAG->getNode(ISD::TokenFactor, "
- "N.getDebugLoc(), MVT::Other, "
- "&InChains[0], InChains.size());");
- if (GenDebug) {
- emitCode("CurDAG->setSubgraphColor(" + ChainName +".getNode(), \"yellow\");");
- emitCode("CurDAG->setSubgraphColor(" + ChainName +".getNode(), \"black\");");
- }
- }
-
- // Loop over all of the operands of the instruction pattern, emitting code
- // to fill them all in. The node 'N' usually has number children equal to
- // the number of input operands of the instruction. However, in cases
- // where there are predicate operands for an instruction, we need to fill
- // in the 'execute always' values. Match up the node operands to the
- // instruction operands to do this.
- std::vector<std::string> AllOps;
- for (unsigned ChildNo = 0, InstOpNo = NumResults;
- InstOpNo != II.OperandList.size(); ++InstOpNo) {
- std::vector<std::string> Ops;
-
- // Determine what to emit for this operand.
- Record *OperandNode = II.OperandList[InstOpNo].Rec;
- if ((OperandNode->isSubClassOf("PredicateOperand") ||
- OperandNode->isSubClassOf("OptionalDefOperand")) &&
- !CGP.getDefaultOperand(OperandNode).DefaultOps.empty()) {
- // This is a predicate or optional def operand; emit the
- // 'default ops' operands.
- const DAGDefaultOperand &DefaultOp =
- CGP.getDefaultOperand(II.OperandList[InstOpNo].Rec);
- for (unsigned i = 0, e = DefaultOp.DefaultOps.size(); i != e; ++i) {
- Ops = EmitResultCode(DefaultOp.DefaultOps[i], DstRegs,
- InFlagDecled, ResNodeDecled);
- AllOps.insert(AllOps.end(), Ops.begin(), Ops.end());
- }
- } else {
- // Otherwise this is a normal operand or a predicate operand without
- // 'execute always'; emit it.
- Ops = EmitResultCode(N->getChild(ChildNo), DstRegs,
- InFlagDecled, ResNodeDecled);
- AllOps.insert(AllOps.end(), Ops.begin(), Ops.end());
- ++ChildNo;
- }
- }
-
- // Emit all the chain and CopyToReg stuff.
- bool ChainEmitted = NodeHasChain;
- if (NodeHasInFlag || HasImpInputs)
- EmitInFlagSelectCode(Pattern, "N", ChainEmitted,
- InFlagDecled, ResNodeDecled, true);
- if (NodeHasOptInFlag || NodeHasInFlag || HasImpInputs) {
- if (!InFlagDecled) {
- emitCode("SDValue InFlag(0, 0);");
- InFlagDecled = true;
- }
- if (NodeHasOptInFlag) {
- emitCode("if (HasInFlag) {");
- emitCode(" InFlag = N.getOperand(N.getNumOperands()-1);");
- emitCode("}");
- }
- }
-
- unsigned ResNo = TmpNo++;
-
- unsigned OpsNo = OpcNo;
- std::string CodePrefix;
- bool ChainAssignmentNeeded = NodeHasChain && !isRoot;
- std::deque<std::string> After;
- std::string NodeName;
- if (!isRoot) {
- NodeName = "Tmp" + utostr(ResNo);
- CodePrefix = "SDValue " + NodeName + "(";
- } else {
- NodeName = "ResNode";
- if (!ResNodeDecled) {
- CodePrefix = "SDNode *" + NodeName + " = ";
- ResNodeDecled = true;
- } else
- CodePrefix = NodeName + " = ";
- }
-
- std::string Code = "Opc" + utostr(OpcNo);
-
- if (!isRoot || (InputHasChain && !NodeHasChain))
- // For call to "getTargetNode()".
- Code += ", N.getDebugLoc()";
-
- emitOpcode(II.Namespace + "::" + II.TheDef->getName());
-
- // Output order: results, chain, flags
- // Result types.
- if (NumResults > 0 && N->getTypeNum(0) != MVT::isVoid) {
- Code += ", VT" + utostr(VTNo);
- emitVT(getEnumName(N->getTypeNum(0)));
- }
- // Add types for implicit results in physical registers, scheduler will
- // care of adding copyfromreg nodes.
- for (unsigned i = 0; i < NumDstRegs; i++) {
- Record *RR = DstRegs[i];
- if (RR->isSubClassOf("Register")) {
- MVT::SimpleValueType RVT = getRegisterValueType(RR, CGT);
- Code += ", " + getEnumName(RVT);
- }
- }
- if (NodeHasChain)
- Code += ", MVT::Other";
- if (NodeHasOutFlag)
- Code += ", MVT::Flag";
-
- // Inputs.
- if (IsVariadic) {
- for (unsigned i = 0, e = AllOps.size(); i != e; ++i)
- emitCode("Ops" + utostr(OpsNo) + ".push_back(" + AllOps[i] + ");");
- AllOps.clear();
-
- // Figure out whether any operands at the end of the op list are not
- // part of the variable section.
- std::string EndAdjust;
- if (NodeHasInFlag || HasImpInputs)
- EndAdjust = "-1"; // Always has one flag.
- else if (NodeHasOptInFlag)
- EndAdjust = "-(HasInFlag?1:0)"; // May have a flag.
-
- emitCode("for (unsigned i = NumInputRootOps + " + utostr(NodeHasChain) +
- ", e = N.getNumOperands()" + EndAdjust + "; i != e; ++i) {");
-
- emitCode(" Ops" + utostr(OpsNo) + ".push_back(N.getOperand(i));");
- emitCode("}");
- }
-
- // Generate MemOperandSDNodes nodes for each memory accesses covered by
- // this pattern.
- if (II.mayLoad | II.mayStore) {
- std::vector<std::string>::const_iterator mi, mie;
- for (mi = LSI.begin(), mie = LSI.end(); mi != mie; ++mi) {
- std::string LSIName = "LSI_" + *mi;
- emitCode("SDValue " + LSIName + " = "
- "CurDAG->getMemOperand(cast<MemSDNode>(" +
- *mi + ")->getMemOperand());");
- if (GenDebug) {
- emitCode("CurDAG->setSubgraphColor(" + LSIName +".getNode(), \"yellow\");");
- emitCode("CurDAG->setSubgraphColor(" + LSIName +".getNode(), \"black\");");
- }
- if (IsVariadic)
- emitCode("Ops" + utostr(OpsNo) + ".push_back(" + LSIName + ");");
- else
- AllOps.push_back(LSIName);
- }
- }
-
- if (NodeHasChain) {
- if (IsVariadic)
- emitCode("Ops" + utostr(OpsNo) + ".push_back(" + ChainName + ");");
- else
- AllOps.push_back(ChainName);
- }
-
- if (IsVariadic) {
- if (NodeHasInFlag || HasImpInputs)
- emitCode("Ops" + utostr(OpsNo) + ".push_back(InFlag);");
- else if (NodeHasOptInFlag) {
- emitCode("if (HasInFlag)");
- emitCode(" Ops" + utostr(OpsNo) + ".push_back(InFlag);");
- }
- Code += ", &Ops" + utostr(OpsNo) + "[0], Ops" + utostr(OpsNo) +
- ".size()";
- } else if (NodeHasInFlag || NodeHasOptInFlag || HasImpInputs)
- AllOps.push_back("InFlag");
-
- unsigned NumOps = AllOps.size();
- if (NumOps) {
- if (!NodeHasOptInFlag && NumOps < 4) {
- for (unsigned i = 0; i != NumOps; ++i)
- Code += ", " + AllOps[i];
- } else {
- std::string OpsCode = "SDValue Ops" + utostr(OpsNo) + "[] = { ";
- for (unsigned i = 0; i != NumOps; ++i) {
- OpsCode += AllOps[i];
- if (i != NumOps-1)
- OpsCode += ", ";
- }
- emitCode(OpsCode + " };");
- Code += ", Ops" + utostr(OpsNo) + ", ";
- if (NodeHasOptInFlag) {
- Code += "HasInFlag ? ";
- Code += utostr(NumOps) + " : " + utostr(NumOps-1);
- } else
- Code += utostr(NumOps);
- }
- }
-
- if (!isRoot)
- Code += "), 0";
-
- std::vector<std::string> ReplaceFroms;
- std::vector<std::string> ReplaceTos;
- if (!isRoot) {
- NodeOps.push_back("Tmp" + utostr(ResNo));
- } else {
-
- if (NodeHasOutFlag) {
- if (!InFlagDecled) {
- After.push_back("SDValue InFlag(ResNode, " +
- utostr(NumResults+NumDstRegs+(unsigned)NodeHasChain) +
- ");");
- InFlagDecled = true;
- } else
- After.push_back("InFlag = SDValue(ResNode, " +
- utostr(NumResults+NumDstRegs+(unsigned)NodeHasChain) +
- ");");
- }
-
- for (unsigned j = 0, e = FoldedChains.size(); j < e; j++) {
- ReplaceFroms.push_back("SDValue(" +
- FoldedChains[j].first + ".getNode(), " +
- utostr(FoldedChains[j].second) +
- ")");
- ReplaceTos.push_back("SDValue(ResNode, " +
- utostr(NumResults+NumDstRegs) + ")");
- }
-
- if (NodeHasOutFlag) {
- if (FoldedFlag.first != "") {
- ReplaceFroms.push_back("SDValue(" + FoldedFlag.first + ".getNode(), " +
- utostr(FoldedFlag.second) + ")");
- ReplaceTos.push_back("InFlag");
- } else {
- assert(NodeHasProperty(Pattern, SDNPOutFlag, CGP));
- ReplaceFroms.push_back("SDValue(N.getNode(), " +
- utostr(NumPatResults + (unsigned)InputHasChain)
- + ")");
- ReplaceTos.push_back("InFlag");
- }
- }
-
- if (!ReplaceFroms.empty() && InputHasChain) {
- ReplaceFroms.push_back("SDValue(N.getNode(), " +
- utostr(NumPatResults) + ")");
- ReplaceTos.push_back("SDValue(" + ChainName + ".getNode(), " +
- ChainName + ".getResNo()" + ")");
- ChainAssignmentNeeded |= NodeHasChain;
- }
-
- // User does not expect the instruction would produce a chain!
- if ((!InputHasChain && NodeHasChain) && NodeHasOutFlag) {
- ;
- } else if (InputHasChain && !NodeHasChain) {
- // One of the inner node produces a chain.
- if (NodeHasOutFlag) {
- ReplaceFroms.push_back("SDValue(N.getNode(), " +
- utostr(NumPatResults+1) +
- ")");
- ReplaceTos.push_back("SDValue(ResNode, N.getResNo()-1)");
- }
- ReplaceFroms.push_back("SDValue(N.getNode(), " +
- utostr(NumPatResults) + ")");
- ReplaceTos.push_back(ChainName);
- }
- }