//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This tablegen backend is responsible for emitting a description of the target
// instruction set for the code generator.
//
//===----------------------------------------------------------------------===//
#include "InstrInfoEmitter.h"
+#include "CodeGenTarget.h"
#include "Record.h"
+#include <algorithm>
+using namespace llvm;
+
+// runEnums - Print out enum values for all of the instructions.
+void InstrInfoEmitter::runEnums(std::ostream &OS) {
+ EmitSourceFileHeader("Target Instruction Enum Values", OS);
+ OS << "namespace llvm {\n\n";
+
+ CodeGenTarget Target;
+
+ // We must emit the PHI opcode first...
+ Record *InstrInfo = Target.getInstructionSet();
+
+ std::string Namespace = Target.inst_begin()->second.Namespace;
+
+ if (!Namespace.empty())
+ OS << "namespace " << Namespace << " {\n";
+ OS << " enum {\n";
-static void EmitSourceHeader(const std::string &Desc, std::ostream &o) {
- o << "//===- TableGen'erated file -------------------------------------*-"
- " C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"
- "d file, do not edit!\n//\n//===------------------------------------"
- "----------------------------------===//\n\n";
+ std::vector<const CodeGenInstruction*> NumberedInstructions;
+ Target.getInstructionsByEnumValue(NumberedInstructions);
+
+ for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
+ OS << " " << NumberedInstructions[i]->TheDef->getName()
+ << ", \t// " << i << "\n";
+ }
+ OS << " INSTRUCTION_LIST_END\n";
+ OS << " };\n";
+ if (!Namespace.empty())
+ OS << "}\n";
+ OS << "} // End llvm namespace \n";
}
-static std::string getQualifiedName(Record *R) {
- std::string Namespace = R->getValueAsString("Namespace");
- if (Namespace.empty()) return R->getName();
- return Namespace + "::" + R->getName();
+void InstrInfoEmitter::printDefList(const std::vector<Record*> &Uses,
+ unsigned Num, std::ostream &OS) const {
+ OS << "static const unsigned ImplicitList" << Num << "[] = { ";
+ for (unsigned i = 0, e = Uses.size(); i != e; ++i)
+ OS << getQualifiedName(Uses[i]) << ", ";
+ OS << "0 };\n";
}
-static Record *getTarget(RecordKeeper &RC) {
- std::vector<Record*> Targets = RC.getAllDerivedDefinitions("Target");
+static std::vector<Record*> GetOperandInfo(const CodeGenInstruction &Inst) {
+ std::vector<Record*> Result;
+ if (Inst.hasVariableNumberOfOperands)
+ return Result; // No info for variable operand instrs.
- if (Targets.size() != 1)
- throw std::string("ERROR: Multiple subclasses of Target defined!");
- return Targets[0];
+ for (unsigned i = 0, e = Inst.OperandList.size(); i != e; ++i) {
+ if (Inst.OperandList[i].Rec->isSubClassOf("RegisterClass")) {
+ Result.push_back(Inst.OperandList[i].Rec);
+ } else {
+ // This might be a multiple operand thing.
+ // Targets like X86 have registers in their multi-operand operands.
+ DagInit *MIOI = Inst.OperandList[i].MIOperandInfo;
+ unsigned NumDefs = MIOI->getNumArgs();
+ for (unsigned j = 0, e = Inst.OperandList[i].MINumOperands; j != e; ++j) {
+ if (NumDefs <= j) {
+ Result.push_back(0);
+ } else {
+ DefInit *Def = dynamic_cast<DefInit*>(MIOI->getArg(j));
+ Result.push_back(Def ? Def->getDef() : 0);
+ }
+ }
+ }
+ }
+ return Result;
}
-// runEnums - Print out enum values for all of the instructions.
-void InstrInfoEmitter::runEnums(std::ostream &OS) {
- std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
- if (Insts.size() == 0)
- throw std::string("No 'Instruction' subclasses defined!");
+// run - Emit the main instruction description records for the target...
+void InstrInfoEmitter::run(std::ostream &OS) {
+ GatherItinClasses();
- std::string Namespace = Insts[0]->getValueAsString("Namespace");
+ EmitSourceFileHeader("Target Instruction Descriptors", OS);
+ OS << "namespace llvm {\n\n";
- EmitSourceHeader("Target Instruction Enum Values", OS);
+ CodeGenTarget Target;
+ const std::string &TargetName = Target.getName();
+ Record *InstrInfo = Target.getInstructionSet();
+ Record *PHI = InstrInfo->getValueAsDef("PHIInst");
- if (!Namespace.empty())
- OS << "namespace " << Namespace << " {\n";
- OS << " enum {\n";
+ // Emit empty implicit uses and defs lists
+ OS << "static const unsigned EmptyImpList[] = { 0 };\n";
- // We must emit the PHI and NOOP opcodes first...
- Record *Target = getTarget(Records);
- Record *InstrInfo = Target->getValueAsDef("InstructionSet");
+ // Keep track of all of the def lists we have emitted already.
+ std::map<std::vector<Record*>, unsigned> EmittedLists;
+ unsigned ListNumber = 0;
+
+ // Emit all of the instruction's implicit uses and defs.
+ for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
+ E = Target.inst_end(); II != E; ++II) {
+ Record *Inst = II->second.TheDef;
+ std::vector<Record*> Uses = Inst->getValueAsListOfDefs("Uses");
+ if (!Uses.empty()) {
+ unsigned &IL = EmittedLists[Uses];
+ if (!IL) printDefList(Uses, IL = ++ListNumber, OS);
+ }
+ std::vector<Record*> Defs = Inst->getValueAsListOfDefs("Defs");
+ if (!Defs.empty()) {
+ unsigned &IL = EmittedLists[Defs];
+ if (!IL) printDefList(Defs, IL = ++ListNumber, OS);
+ }
+ }
- Record *PHI = InstrInfo->getValueAsDef("PHIInst");
- Record *NOOP = InstrInfo->getValueAsDef("NOOPInst");
+ std::map<std::vector<Record*>, unsigned> OperandInfosEmitted;
+ unsigned OperandListNum = 0;
+ OperandInfosEmitted[std::vector<Record*>()] = ++OperandListNum;
+
+ // Emit all of the operand info records.
+ OS << "\n";
+ for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
+ E = Target.inst_end(); II != E; ++II) {
+ std::vector<Record*> OperandInfo = GetOperandInfo(II->second);
+ unsigned &N = OperandInfosEmitted[OperandInfo];
+ if (N == 0) {
+ N = ++OperandListNum;
+ OS << "static const TargetOperandInfo OperandInfo" << N << "[] = { ";
+ for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i) {
+ Record *RC = OperandInfo[i];
+ // FIXME: We only care about register operands for now.
+ if (RC && RC->isSubClassOf("RegisterClass")) {
+ OS << "{ &" << getQualifiedName(RC) << "RegClass }, ";
+ } else {
+ OS << "{ 0 }, ";
+ }
+ }
+ OS << "};\n";
+ }
+ }
+
+ // Emit all of the TargetInstrDescriptor records.
+ //
+ OS << "\nstatic const TargetInstrDescriptor " << TargetName
+ << "Insts[] = {\n";
+ emitRecord(Target.getPHIInstruction(), 0, InstrInfo, EmittedLists,
+ OperandInfosEmitted, OS);
- OS << " " << PHI->getName() << ", \t// 0 (fixed for all targets)\n"
- << " " << NOOP->getName() << ", \t// 1 (fixed for all targets)\n";
+ unsigned i = 0;
+ for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
+ E = Target.inst_end(); II != E; ++II)
+ if (II->second.TheDef != PHI)
+ emitRecord(II->second, ++i, InstrInfo, EmittedLists,
+ OperandInfosEmitted, OS);
+ OS << "};\n";
+ OS << "} // End llvm namespace \n";
+}
+
+void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
+ Record *InstrInfo,
+ std::map<std::vector<Record*>, unsigned> &EmittedLists,
+ std::map<std::vector<Record*>, unsigned> &OpInfo,
+ std::ostream &OS) {
+ int NumOperands;
+ if (Inst.hasVariableNumberOfOperands)
+ NumOperands = -1;
+ else if (!Inst.OperandList.empty())
+ // Each logical operand can be multiple MI operands.
+ NumOperands = Inst.OperandList.back().MIOperandNo +
+ Inst.OperandList.back().MINumOperands;
+ else
+ NumOperands = 0;
- // Print out the rest of the instructions now...
- for (unsigned i = 0, e = Insts.size(); i != e; ++i)
- if (Insts[i] != PHI && Insts[i] != NOOP)
- OS << " " << Insts[i]->getName() << ", \t// " << i+2 << "\n";
+ OS << " { \"";
+ if (Inst.Name.empty())
+ OS << Inst.TheDef->getName();
+ else
+ OS << Inst.Name;
- OS << " };\n";
- if (!Namespace.empty())
- OS << "}\n";
+ unsigned ItinClass = !IsItineraries ? 0 :
+ ItinClassNumber(Inst.TheDef->getValueAsDef("Itinerary")->getName());
+
+ OS << "\",\t" << NumOperands << ", -1, 0, false, 0, 0, "
+ << ItinClass
+ << ", 0";
+
+ // Emit all of the target indepedent flags...
+ if (Inst.isReturn) OS << "|M_RET_FLAG";
+ if (Inst.isBranch) OS << "|M_BRANCH_FLAG";
+ if (Inst.isBarrier) OS << "|M_BARRIER_FLAG";
+ if (Inst.hasDelaySlot) OS << "|M_DELAY_SLOT_FLAG";
+ if (Inst.isCall) OS << "|M_CALL_FLAG";
+ if (Inst.isLoad) OS << "|M_LOAD_FLAG";
+ if (Inst.isStore) OS << "|M_STORE_FLAG";
+ if (Inst.isTwoAddress) OS << "|M_2_ADDR_FLAG";
+ if (Inst.isConvertibleToThreeAddress) OS << "|M_CONVERTIBLE_TO_3_ADDR";
+ if (Inst.isCommutable) OS << "|M_COMMUTABLE";
+ if (Inst.isTerminator) OS << "|M_TERMINATOR_FLAG";
+ if (Inst.usesCustomDAGSchedInserter)
+ OS << "|M_USES_CUSTOM_DAG_SCHED_INSERTION";
+ OS << ", 0";
+
+ // Emit all of the target-specific flags...
+ ListInit *LI = InstrInfo->getValueAsListInit("TSFlagsFields");
+ ListInit *Shift = InstrInfo->getValueAsListInit("TSFlagsShifts");
+ if (LI->getSize() != Shift->getSize())
+ throw "Lengths of " + InstrInfo->getName() +
+ ":(TargetInfoFields, TargetInfoPositions) must be equal!";
+
+ for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
+ emitShiftedValue(Inst.TheDef, dynamic_cast<StringInit*>(LI->getElement(i)),
+ dynamic_cast<IntInit*>(Shift->getElement(i)), OS);
+
+ OS << ", ";
+
+ // Emit the implicit uses and defs lists...
+ std::vector<Record*> UseList = Inst.TheDef->getValueAsListOfDefs("Uses");
+ if (UseList.empty())
+ OS << "EmptyImpList, ";
+ else
+ OS << "ImplicitList" << EmittedLists[UseList] << ", ";
+
+ std::vector<Record*> DefList = Inst.TheDef->getValueAsListOfDefs("Defs");
+ if (DefList.empty())
+ OS << "EmptyImpList, ";
+ else
+ OS << "ImplicitList" << EmittedLists[DefList] << ", ";
+
+ // Emit the operand info.
+ std::vector<Record*> OperandInfo = GetOperandInfo(Inst);
+ if (OperandInfo.empty())
+ OS << "0";
+ else
+ OS << "OperandInfo" << OpInfo[OperandInfo];
+
+ OS << " }, // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
}
+
+struct LessRecord {
+ bool operator()(const Record *Rec1, const Record *Rec2) const {
+ return Rec1->getName() < Rec2->getName();
+ }
+};
+void InstrInfoEmitter::GatherItinClasses() {
+ std::vector<Record*> DefList =
+ Records.getAllDerivedDefinitions("InstrItinClass");
+ IsItineraries = !DefList.empty();
+
+ if (!IsItineraries) return;
+
+ sort(DefList.begin(), DefList.end(), LessRecord());
+
+ for (unsigned i = 0, N = DefList.size(); i < N; i++) {
+ Record *Def = DefList[i];
+ ItinClassMap[Def->getName()] = i;
+ }
+}
+
+unsigned InstrInfoEmitter::ItinClassNumber(std::string ItinName) {
+ return ItinClassMap[ItinName];
+}
+
+void InstrInfoEmitter::emitShiftedValue(Record *R, StringInit *Val,
+ IntInit *ShiftInt, std::ostream &OS) {
+ if (Val == 0 || ShiftInt == 0)
+ throw std::string("Illegal value or shift amount in TargetInfo*!");
+ RecordVal *RV = R->getValue(Val->getValue());
+ int Shift = ShiftInt->getValue();
+
+ if (RV == 0 || RV->getValue() == 0)
+ throw R->getName() + " doesn't have a field named '" + Val->getValue()+"'!";
+
+ Init *Value = RV->getValue();
+ if (BitInit *BI = dynamic_cast<BitInit*>(Value)) {
+ if (BI->getValue()) OS << "|(1<<" << Shift << ")";
+ return;
+ } else if (BitsInit *BI = dynamic_cast<BitsInit*>(Value)) {
+ // Convert the Bits to an integer to print...
+ Init *I = BI->convertInitializerTo(new IntRecTy());
+ if (I)
+ if (IntInit *II = dynamic_cast<IntInit*>(I)) {
+ if (II->getValue())
+ OS << "|(" << II->getValue() << "<<" << Shift << ")";
+ return;
+ }
+
+ } else if (IntInit *II = dynamic_cast<IntInit*>(Value)) {
+ if (II->getValue()) OS << "|(" << II->getValue() << "<<" << Shift << ")";
+ return;
+ }
+
+ std::cerr << "Unhandled initializer: " << *Val << "\n";
+ throw "In record '" + R->getName() + "' for TSFlag emission.";
+}
+
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