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//===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
//
// This tablegen backend is responsible for emitting a description of the target
// instruction set for the code generator.
//
//===----------------------------------------------------------------------===//
#include "InstrInfoEmitter.h"
#include "Record.h"
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";
}
static std::string getQualifiedName(Record *R) {
std::string Namespace = R->getValueAsString("Namespace");
if (Namespace.empty()) return R->getName();
return Namespace + "::" + R->getName();
}
static Record *getTarget(RecordKeeper &RC) {
std::vector<Record*> Targets = RC.getAllDerivedDefinitions("Target");
if (Targets.size() != 1)
throw std::string("ERROR: Multiple subclasses of Target defined!");
return Targets[0];
}
// 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!");
std::string Namespace = Insts[0]->getValueAsString("Namespace");
EmitSourceHeader("Target Instruction Enum Values", OS);
if (!Namespace.empty())
OS << "namespace " << Namespace << " {\n";
OS << " enum {\n";
// We must emit the PHI and NOOP opcodes first...
Record *Target = getTarget(Records);
Record *InstrInfo = Target->getValueAsDef("InstructionSet");
Record *PHI = InstrInfo->getValueAsDef("PHIInst");
Record *NOOP = InstrInfo->getValueAsDef("NOOPInst");
OS << " " << PHI->getName() << ", \t// 0 (fixed for all targets)\n"
<< " " << NOOP->getName() << ", \t// 1 (fixed for all targets)\n";
// 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 << " };\n";
if (!Namespace.empty())
OS << "}\n";
}
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