2003-08-01 04:38:38 +00:00
|
|
|
//===- RegisterInfoEmitter.cpp - Generate a Register File Desc. -*- C++ -*-===//
|
|
|
|
//
|
|
|
|
// This tablegen backend is responsible for emitting a description of a target
|
|
|
|
// register file for a code generator. It uses instances of the Register,
|
|
|
|
// RegisterAliases, and RegisterClass classes to gather this information.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#include "RegisterInfoEmitter.h"
|
|
|
|
#include "Record.h"
|
2003-08-01 06:27:59 +00:00
|
|
|
#include "Support/StringExtras.h"
|
2003-08-01 05:59:20 +00:00
|
|
|
#include <set>
|
2003-08-01 04:38:38 +00:00
|
|
|
|
|
|
|
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";
|
|
|
|
}
|
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
// runEnums - Print out enum values for all of the registers.
|
|
|
|
void RegisterInfoEmitter::runEnums(std::ostream &OS) {
|
|
|
|
std::vector<Record*> Registers = Records.getAllDerivedDefinitions("Register");
|
|
|
|
|
|
|
|
if (Registers.size() == 0)
|
|
|
|
throw std::string("No 'Register' subclasses defined!");
|
|
|
|
|
|
|
|
std::string Namespace = Registers[0]->getValueAsString("Namespace");
|
|
|
|
|
|
|
|
EmitSourceHeader("Target Register Enum Values", OS);
|
|
|
|
|
|
|
|
if (!Namespace.empty())
|
|
|
|
OS << "namespace " << Namespace << " {\n";
|
|
|
|
OS << " enum {\n NoRegister,\n";
|
|
|
|
|
|
|
|
for (unsigned i = 0, e = Registers.size(); i != e; ++i)
|
|
|
|
OS << " " << Registers[i]->getName() << ",\n";
|
|
|
|
|
|
|
|
OS << " };\n";
|
|
|
|
if (!Namespace.empty())
|
|
|
|
OS << "}\n";
|
|
|
|
}
|
|
|
|
|
2003-08-01 04:38:38 +00:00
|
|
|
void RegisterInfoEmitter::runHeader(std::ostream &OS) {
|
|
|
|
std::vector<Record*> RegisterInfos =
|
|
|
|
Records.getAllDerivedDefinitions("RegisterInfo");
|
|
|
|
|
|
|
|
if (RegisterInfos.size() != 1)
|
|
|
|
throw std::string("ERROR: Multiple subclasses of RegisterInfo defined!");
|
|
|
|
|
|
|
|
EmitSourceHeader("Register Information Header Fragment", OS);
|
|
|
|
|
|
|
|
std::string ClassName = RegisterInfos[0]->getValueAsString("ClassName");
|
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
OS << "#include \"llvm/Target/MRegisterInfo.h\"\n\n";
|
2003-08-01 04:38:38 +00:00
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
OS << "struct " << ClassName << " : public MRegisterInfo {\n"
|
2003-08-01 04:38:38 +00:00
|
|
|
<< " " << ClassName << "();\n"
|
|
|
|
<< " const unsigned* getCalleeSaveRegs() const;\n"
|
|
|
|
<< "};\n\n";
|
|
|
|
}
|
|
|
|
|
2003-08-01 06:27:59 +00:00
|
|
|
static std::string getQualifiedRecordName(Record *R) {
|
|
|
|
std::string Namespace = R->getValueAsString("Namespace");
|
|
|
|
if (Namespace.empty()) return R->getName();
|
|
|
|
return Namespace + "::" + R->getName();
|
|
|
|
}
|
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
// RegisterInfoEmitter::run - Main register file description emitter.
|
|
|
|
//
|
|
|
|
void RegisterInfoEmitter::run(std::ostream &OS) {
|
|
|
|
EmitSourceHeader("Register Information Source Fragment", OS);
|
|
|
|
|
|
|
|
// Start out by emitting each of the register classes... to do this, we build
|
|
|
|
// a set of registers which belong to a register class, this is to ensure that
|
|
|
|
// each register is only in a single register class.
|
|
|
|
//
|
|
|
|
std::vector<Record*> RegisterClasses =
|
|
|
|
Records.getAllDerivedDefinitions("RegisterClass");
|
|
|
|
|
2003-08-01 06:27:59 +00:00
|
|
|
std::vector<Record*> Registers = Records.getAllDerivedDefinitions("Register");
|
|
|
|
Record *RegisterClass = Records.getClass("Register");
|
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
std::set<Record*> RegistersFound;
|
|
|
|
|
|
|
|
// Loop over all of the register classes... emitting each one.
|
|
|
|
OS << "namespace { // Register classes...\n";
|
|
|
|
std::vector<std::string> RegisterClassNames;
|
|
|
|
for (unsigned rc = 0, e = RegisterClasses.size(); rc != e; ++rc) {
|
|
|
|
Record *RC = RegisterClasses[rc];
|
|
|
|
std::string Name = RC->getName();
|
2003-08-01 06:27:59 +00:00
|
|
|
if (Name[9] == '.') {
|
|
|
|
static unsigned AnonCounter = 0;
|
|
|
|
Name = "AnonRegClass_"+utostr(AnonCounter++);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Emit the register list now...
|
|
|
|
OS << " // " << Name << " Register Class...\n const unsigned " << Name
|
|
|
|
<< "[] = {\n ";
|
|
|
|
ListInit *RegList = RC->getValueAsListInit("MemberList");
|
|
|
|
for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) {
|
|
|
|
Record *Reg = RegList->getElement(i);
|
|
|
|
if (!Reg->isSubClassOf(RegisterClass))
|
|
|
|
throw "Register Class member '" + Reg->getName() +
|
|
|
|
" does not derive from the Register class!";
|
|
|
|
if (RegistersFound.count(Reg))
|
|
|
|
throw "Register '" + Reg->getName() +
|
|
|
|
"' included in multiple register classes!";
|
|
|
|
OS << getQualifiedRecordName(Reg) << ", ";
|
|
|
|
}
|
|
|
|
OS << "\n };\n\n";
|
|
|
|
|
|
|
|
OS << " struct " << Name << "Class : public TargetRegisterClass {\n"
|
|
|
|
<< " " << Name << "Class() : TargetRegisterClass("
|
|
|
|
<< RC->getValueAsInt("Size")/8 << ", " << RC->getValueAsInt("Alignment")
|
|
|
|
<< ", " << Name << ", " << Name << " + " << RegList->getSize()
|
|
|
|
<< ") {}\n";
|
|
|
|
|
|
|
|
if (CodeInit *CI = dynamic_cast<CodeInit*>(RC->getValueInit("Methods")))
|
|
|
|
OS << CI->getValue();
|
|
|
|
else
|
|
|
|
throw "Expected 'code' fragment for 'Methods' value in register class '"+
|
|
|
|
RC->getName() + "'!";
|
|
|
|
|
|
|
|
OS << " } " << Name << "Instance;\n\n";
|
2003-08-01 05:59:20 +00:00
|
|
|
|
|
|
|
}
|
2003-08-01 04:38:38 +00:00
|
|
|
|
2003-08-01 05:59:20 +00:00
|
|
|
OS << "}\n"; // End of anonymous namespace...
|
2003-08-01 04:38:38 +00:00
|
|
|
}
|