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33ccf7edff
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7515 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
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//
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// This tablegen backend is responsible for emitting a description of the target
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// instruction set for the code generator.
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//
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//===----------------------------------------------------------------------===//
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#include "InstrInfoEmitter.h"
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#include "Record.h"
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static void EmitSourceHeader(const std::string &Desc, std::ostream &o) {
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o << "//===- TableGen'erated file -------------------------------------*-"
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" C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"
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"d file, do not edit!\n//\n//===------------------------------------"
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"----------------------------------===//\n\n";
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}
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static std::string getQualifiedName(Record *R) {
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std::string Namespace = R->getValueAsString("Namespace");
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if (Namespace.empty()) return R->getName();
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return Namespace + "::" + R->getName();
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}
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static Record *getTarget(RecordKeeper &RC) {
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std::vector<Record*> Targets = RC.getAllDerivedDefinitions("Target");
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if (Targets.size() != 1)
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throw std::string("ERROR: Multiple subclasses of Target defined!");
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return Targets[0];
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}
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// runEnums - Print out enum values for all of the instructions.
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void InstrInfoEmitter::runEnums(std::ostream &OS) {
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std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
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if (Insts.size() == 0)
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throw std::string("No 'Instruction' subclasses defined!");
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std::string Namespace = Insts[0]->getValueAsString("Namespace");
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EmitSourceHeader("Target Instruction Enum Values", OS);
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if (!Namespace.empty())
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OS << "namespace " << Namespace << " {\n";
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OS << " enum {\n";
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// We must emit the PHI and NOOP opcodes first...
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Record *Target = getTarget(Records);
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Record *InstrInfo = Target->getValueAsDef("InstructionSet");
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Record *PHI = InstrInfo->getValueAsDef("PHIInst");
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Record *NOOP = InstrInfo->getValueAsDef("NOOPInst");
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OS << " " << PHI->getName() << ", \t// 0 (fixed for all targets)\n"
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<< " " << NOOP->getName() << ", \t// 1 (fixed for all targets)\n";
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// Print out the rest of the instructions now...
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for (unsigned i = 0, e = Insts.size(); i != e; ++i)
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if (Insts[i] != PHI && Insts[i] != NOOP)
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OS << " " << Insts[i]->getName() << ", \t// " << i+2 << "\n";
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OS << " };\n";
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if (!Namespace.empty())
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OS << "}\n";
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}
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