mirror of
https://github.com/c64scene-ar/llvm-6502.git
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874ae251c3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72712 91177308-0d34-0410-b5e6-96231b3b80d8
577 lines
21 KiB
C++
577 lines
21 KiB
C++
//===- CodeGenTarget.cpp - CodeGen Target Class Wrapper -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class wraps target description classes used by the various code
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// generation TableGen backends. This makes it easier to access the data and
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// provides a single place that needs to check it for validity. All of these
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// classes throw exceptions on error conditions.
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//
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//===----------------------------------------------------------------------===//
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#include "CodeGenTarget.h"
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#include "CodeGenIntrinsics.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Streams.h"
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#include <algorithm>
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using namespace llvm;
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static cl::opt<unsigned>
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AsmWriterNum("asmwriternum", cl::init(0),
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cl::desc("Make -gen-asm-writer emit assembly writer #N"));
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/// getValueType - Return the MVT::SimpleValueType that the specified TableGen
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/// record corresponds to.
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MVT::SimpleValueType llvm::getValueType(Record *Rec) {
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return (MVT::SimpleValueType)Rec->getValueAsInt("Value");
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}
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std::string llvm::getName(MVT::SimpleValueType T) {
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switch (T) {
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case MVT::Other: return "UNKNOWN";
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case MVT::i1: return "MVT::i1";
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case MVT::i8: return "MVT::i8";
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case MVT::i16: return "MVT::i16";
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case MVT::i32: return "MVT::i32";
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case MVT::i64: return "MVT::i64";
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case MVT::i128: return "MVT::i128";
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case MVT::iAny: return "MVT::iAny";
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case MVT::fAny: return "MVT::fAny";
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case MVT::f32: return "MVT::f32";
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case MVT::f64: return "MVT::f64";
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case MVT::f80: return "MVT::f80";
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case MVT::f128: return "MVT::f128";
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case MVT::ppcf128: return "MVT::ppcf128";
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case MVT::Flag: return "MVT::Flag";
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case MVT::isVoid:return "MVT::isVoid";
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case MVT::v2i8: return "MVT::v2i8";
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case MVT::v4i8: return "MVT::v4i8";
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case MVT::v2i16: return "MVT::v2i16";
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case MVT::v8i8: return "MVT::v8i8";
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case MVT::v4i16: return "MVT::v4i16";
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case MVT::v2i32: return "MVT::v2i32";
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case MVT::v1i64: return "MVT::v1i64";
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case MVT::v16i8: return "MVT::v16i8";
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case MVT::v8i16: return "MVT::v8i16";
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case MVT::v4i32: return "MVT::v4i32";
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case MVT::v2i64: return "MVT::v2i64";
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case MVT::v2f32: return "MVT::v2f32";
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case MVT::v4f32: return "MVT::v4f32";
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case MVT::v2f64: return "MVT::v2f64";
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case MVT::v3i32: return "MVT::v3i32";
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case MVT::v3f32: return "MVT::v3f32";
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case MVT::iPTR: return "TLI.getPointerTy()";
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case MVT::iPTRAny: return "TLI.getPointerTy()";
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default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
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}
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}
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std::string llvm::getEnumName(MVT::SimpleValueType T) {
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switch (T) {
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case MVT::Other: return "MVT::Other";
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case MVT::i1: return "MVT::i1";
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case MVT::i8: return "MVT::i8";
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case MVT::i16: return "MVT::i16";
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case MVT::i32: return "MVT::i32";
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case MVT::i64: return "MVT::i64";
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case MVT::i128: return "MVT::i128";
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case MVT::iAny: return "MVT::iAny";
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case MVT::fAny: return "MVT::fAny";
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case MVT::f32: return "MVT::f32";
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case MVT::f64: return "MVT::f64";
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case MVT::f80: return "MVT::f80";
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case MVT::f128: return "MVT::f128";
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case MVT::ppcf128: return "MVT::ppcf128";
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case MVT::Flag: return "MVT::Flag";
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case MVT::isVoid:return "MVT::isVoid";
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case MVT::v2i8: return "MVT::v2i8";
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case MVT::v4i8: return "MVT::v4i8";
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case MVT::v2i16: return "MVT::v2i16";
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case MVT::v8i8: return "MVT::v8i8";
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case MVT::v4i16: return "MVT::v4i16";
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case MVT::v2i32: return "MVT::v2i32";
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case MVT::v1i64: return "MVT::v1i64";
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case MVT::v16i8: return "MVT::v16i8";
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case MVT::v8i16: return "MVT::v8i16";
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case MVT::v4i32: return "MVT::v4i32";
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case MVT::v2i64: return "MVT::v2i64";
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case MVT::v2f32: return "MVT::v2f32";
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case MVT::v4f32: return "MVT::v4f32";
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case MVT::v2f64: return "MVT::v2f64";
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case MVT::v3i32: return "MVT::v3i32";
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case MVT::v3f32: return "MVT::v3f32";
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case MVT::iPTR: return "MVT::iPTR";
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case MVT::iPTRAny: return "MVT::iPTRAny";
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default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
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}
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}
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/// getQualifiedName - Return the name of the specified record, with a
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/// namespace qualifier if the record contains one.
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///
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std::string llvm::getQualifiedName(const 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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/// getTarget - Return the current instance of the Target class.
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///
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CodeGenTarget::CodeGenTarget() {
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std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
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if (Targets.size() == 0)
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throw std::string("ERROR: No 'Target' subclasses defined!");
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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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TargetRec = Targets[0];
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}
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const std::string &CodeGenTarget::getName() const {
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return TargetRec->getName();
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}
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std::string CodeGenTarget::getInstNamespace() const {
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std::string InstNS;
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for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
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InstNS = i->second.Namespace;
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// Make sure not to pick up "TargetInstrInfo" by accidentally getting
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// the namespace off the PHI instruction or something.
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if (InstNS != "TargetInstrInfo")
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break;
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}
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return InstNS;
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}
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Record *CodeGenTarget::getInstructionSet() const {
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return TargetRec->getValueAsDef("InstructionSet");
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}
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/// getAsmWriter - Return the AssemblyWriter definition for this target.
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///
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Record *CodeGenTarget::getAsmWriter() const {
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std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
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if (AsmWriterNum >= LI.size())
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throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
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return LI[AsmWriterNum];
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}
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void CodeGenTarget::ReadRegisters() const {
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std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
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if (Regs.empty())
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throw std::string("No 'Register' subclasses defined!");
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Registers.reserve(Regs.size());
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Registers.assign(Regs.begin(), Regs.end());
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}
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CodeGenRegister::CodeGenRegister(Record *R) : TheDef(R) {
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DeclaredSpillSize = R->getValueAsInt("SpillSize");
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DeclaredSpillAlignment = R->getValueAsInt("SpillAlignment");
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}
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const std::string &CodeGenRegister::getName() const {
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return TheDef->getName();
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}
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void CodeGenTarget::ReadRegisterClasses() const {
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std::vector<Record*> RegClasses =
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Records.getAllDerivedDefinitions("RegisterClass");
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if (RegClasses.empty())
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throw std::string("No 'RegisterClass' subclasses defined!");
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RegisterClasses.reserve(RegClasses.size());
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RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
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}
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std::vector<unsigned char> CodeGenTarget::getRegisterVTs(Record *R) const {
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std::vector<unsigned char> Result;
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const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
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for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
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const CodeGenRegisterClass &RC = RegisterClasses[i];
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for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
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if (R == RC.Elements[ei]) {
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const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
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for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
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Result.push_back(InVTs[i]);
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}
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}
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}
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return Result;
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}
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CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
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// Rename anonymous register classes.
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if (R->getName().size() > 9 && R->getName()[9] == '.') {
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static unsigned AnonCounter = 0;
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R->setName("AnonRegClass_"+utostr(AnonCounter++));
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}
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std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
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for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
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Record *Type = TypeList[i];
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if (!Type->isSubClassOf("ValueType"))
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throw "RegTypes list member '" + Type->getName() +
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"' does not derive from the ValueType class!";
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VTs.push_back(getValueType(Type));
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}
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assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
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std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
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for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
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Record *Reg = RegList[i];
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if (!Reg->isSubClassOf("Register"))
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throw "Register Class member '" + Reg->getName() +
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"' does not derive from the Register class!";
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Elements.push_back(Reg);
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}
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std::vector<Record*> SubRegClassList =
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R->getValueAsListOfDefs("SubRegClassList");
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for (unsigned i = 0, e = SubRegClassList.size(); i != e; ++i) {
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Record *SubRegClass = SubRegClassList[i];
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if (!SubRegClass->isSubClassOf("RegisterClass"))
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throw "Register Class member '" + SubRegClass->getName() +
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"' does not derive from the RegisterClass class!";
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SubRegClasses.push_back(SubRegClass);
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}
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// Allow targets to override the size in bits of the RegisterClass.
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unsigned Size = R->getValueAsInt("Size");
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Namespace = R->getValueAsString("Namespace");
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SpillSize = Size ? Size : MVT(VTs[0]).getSizeInBits();
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SpillAlignment = R->getValueAsInt("Alignment");
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CopyCost = R->getValueAsInt("CopyCost");
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MethodBodies = R->getValueAsCode("MethodBodies");
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MethodProtos = R->getValueAsCode("MethodProtos");
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}
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const std::string &CodeGenRegisterClass::getName() const {
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return TheDef->getName();
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}
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void CodeGenTarget::ReadLegalValueTypes() const {
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const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
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for (unsigned i = 0, e = RCs.size(); i != e; ++i)
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for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
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LegalValueTypes.push_back(RCs[i].VTs[ri]);
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// Remove duplicates.
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std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
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LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
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LegalValueTypes.end()),
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LegalValueTypes.end());
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}
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void CodeGenTarget::ReadInstructions() const {
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std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
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if (Insts.size() <= 2)
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throw std::string("No 'Instruction' subclasses defined!");
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// Parse the instructions defined in the .td file.
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std::string InstFormatName =
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getAsmWriter()->getValueAsString("InstFormatName");
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for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
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std::string AsmStr = Insts[i]->getValueAsString(InstFormatName);
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Instructions.insert(std::make_pair(Insts[i]->getName(),
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CodeGenInstruction(Insts[i], AsmStr)));
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}
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}
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/// getInstructionsByEnumValue - Return all of the instructions defined by the
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/// target, ordered by their enum value.
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void CodeGenTarget::
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getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
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&NumberedInstructions) {
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std::map<std::string, CodeGenInstruction>::const_iterator I;
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I = getInstructions().find("PHI");
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if (I == Instructions.end()) throw "Could not find 'PHI' instruction!";
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const CodeGenInstruction *PHI = &I->second;
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I = getInstructions().find("INLINEASM");
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if (I == Instructions.end()) throw "Could not find 'INLINEASM' instruction!";
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const CodeGenInstruction *INLINEASM = &I->second;
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I = getInstructions().find("DBG_LABEL");
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if (I == Instructions.end()) throw "Could not find 'DBG_LABEL' instruction!";
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const CodeGenInstruction *DBG_LABEL = &I->second;
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I = getInstructions().find("EH_LABEL");
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if (I == Instructions.end()) throw "Could not find 'EH_LABEL' instruction!";
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const CodeGenInstruction *EH_LABEL = &I->second;
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I = getInstructions().find("GC_LABEL");
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if (I == Instructions.end()) throw "Could not find 'GC_LABEL' instruction!";
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const CodeGenInstruction *GC_LABEL = &I->second;
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I = getInstructions().find("DECLARE");
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if (I == Instructions.end()) throw "Could not find 'DECLARE' instruction!";
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const CodeGenInstruction *DECLARE = &I->second;
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I = getInstructions().find("EXTRACT_SUBREG");
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if (I == Instructions.end())
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throw "Could not find 'EXTRACT_SUBREG' instruction!";
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const CodeGenInstruction *EXTRACT_SUBREG = &I->second;
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I = getInstructions().find("INSERT_SUBREG");
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if (I == Instructions.end())
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throw "Could not find 'INSERT_SUBREG' instruction!";
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const CodeGenInstruction *INSERT_SUBREG = &I->second;
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I = getInstructions().find("IMPLICIT_DEF");
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if (I == Instructions.end())
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throw "Could not find 'IMPLICIT_DEF' instruction!";
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const CodeGenInstruction *IMPLICIT_DEF = &I->second;
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I = getInstructions().find("SUBREG_TO_REG");
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if (I == Instructions.end())
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throw "Could not find 'SUBREG_TO_REG' instruction!";
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const CodeGenInstruction *SUBREG_TO_REG = &I->second;
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I = getInstructions().find("COPY_TO_REGCLASS");
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if (I == Instructions.end())
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throw "Could not find 'COPY_TO_REGCLASS' instruction!";
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const CodeGenInstruction *COPY_TO_REGCLASS = &I->second;
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// Print out the rest of the instructions now.
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NumberedInstructions.push_back(PHI);
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NumberedInstructions.push_back(INLINEASM);
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NumberedInstructions.push_back(DBG_LABEL);
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NumberedInstructions.push_back(EH_LABEL);
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NumberedInstructions.push_back(GC_LABEL);
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NumberedInstructions.push_back(DECLARE);
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NumberedInstructions.push_back(EXTRACT_SUBREG);
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NumberedInstructions.push_back(INSERT_SUBREG);
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NumberedInstructions.push_back(IMPLICIT_DEF);
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NumberedInstructions.push_back(SUBREG_TO_REG);
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NumberedInstructions.push_back(COPY_TO_REGCLASS);
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for (inst_iterator II = inst_begin(), E = inst_end(); II != E; ++II)
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if (&II->second != PHI &&
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&II->second != INLINEASM &&
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&II->second != DBG_LABEL &&
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&II->second != EH_LABEL &&
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&II->second != GC_LABEL &&
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&II->second != DECLARE &&
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&II->second != EXTRACT_SUBREG &&
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&II->second != INSERT_SUBREG &&
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&II->second != IMPLICIT_DEF &&
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&II->second != SUBREG_TO_REG &&
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&II->second != COPY_TO_REGCLASS)
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NumberedInstructions.push_back(&II->second);
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}
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/// isLittleEndianEncoding - Return whether this target encodes its instruction
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/// in little-endian format, i.e. bits laid out in the order [0..n]
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///
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bool CodeGenTarget::isLittleEndianEncoding() const {
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return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
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}
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//===----------------------------------------------------------------------===//
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// ComplexPattern implementation
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//
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ComplexPattern::ComplexPattern(Record *R) {
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Ty = ::getValueType(R->getValueAsDef("Ty"));
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NumOperands = R->getValueAsInt("NumOperands");
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SelectFunc = R->getValueAsString("SelectFunc");
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RootNodes = R->getValueAsListOfDefs("RootNodes");
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// Parse the properties.
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Properties = 0;
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std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
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for (unsigned i = 0, e = PropList.size(); i != e; ++i)
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if (PropList[i]->getName() == "SDNPHasChain") {
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Properties |= 1 << SDNPHasChain;
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} else if (PropList[i]->getName() == "SDNPOptInFlag") {
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Properties |= 1 << SDNPOptInFlag;
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} else if (PropList[i]->getName() == "SDNPMayStore") {
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Properties |= 1 << SDNPMayStore;
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} else if (PropList[i]->getName() == "SDNPMayLoad") {
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Properties |= 1 << SDNPMayLoad;
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} else if (PropList[i]->getName() == "SDNPSideEffect") {
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Properties |= 1 << SDNPSideEffect;
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} else if (PropList[i]->getName() == "SDNPMemOperand") {
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Properties |= 1 << SDNPMemOperand;
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} else {
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cerr << "Unsupported SD Node property '" << PropList[i]->getName()
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<< "' on ComplexPattern '" << R->getName() << "'!\n";
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exit(1);
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}
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// Parse the attributes.
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Attributes = 0;
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PropList = R->getValueAsListOfDefs("Attributes");
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for (unsigned i = 0, e = PropList.size(); i != e; ++i)
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if (PropList[i]->getName() == "CPAttrParentAsRoot") {
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Attributes |= 1 << CPAttrParentAsRoot;
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} else {
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cerr << "Unsupported pattern attribute '" << PropList[i]->getName()
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<< "' on ComplexPattern '" << R->getName() << "'!\n";
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exit(1);
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}
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}
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//===----------------------------------------------------------------------===//
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// CodeGenIntrinsic Implementation
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//===----------------------------------------------------------------------===//
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std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
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bool TargetOnly) {
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std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
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std::vector<CodeGenIntrinsic> Result;
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for (unsigned i = 0, e = I.size(); i != e; ++i) {
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bool isTarget = I[i]->getValueAsBit("isTarget");
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if (isTarget == TargetOnly)
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Result.push_back(CodeGenIntrinsic(I[i]));
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}
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return Result;
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}
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CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
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TheDef = R;
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std::string DefName = R->getName();
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ModRef = WriteMem;
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isOverloaded = false;
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isCommutative = false;
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if (DefName.size() <= 4 ||
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std::string(DefName.begin(), DefName.begin() + 4) != "int_")
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throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
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EnumName = std::string(DefName.begin()+4, DefName.end());
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if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
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GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
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TargetPrefix = R->getValueAsString("TargetPrefix");
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Name = R->getValueAsString("LLVMName");
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if (Name == "") {
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// If an explicit name isn't specified, derive one from the DefName.
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Name = "llvm.";
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for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
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Name += (EnumName[i] == '_') ? '.' : EnumName[i];
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} else {
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// Verify it starts with "llvm.".
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if (Name.size() <= 5 ||
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std::string(Name.begin(), Name.begin() + 5) != "llvm.")
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throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
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}
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// If TargetPrefix is specified, make sure that Name starts with
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// "llvm.<targetprefix>.".
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if (!TargetPrefix.empty()) {
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if (Name.size() < 6+TargetPrefix.size() ||
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std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
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!= (TargetPrefix + "."))
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throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
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TargetPrefix + ".'!";
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}
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// Parse the list of return types.
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std::vector<MVT::SimpleValueType> OverloadedVTs;
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ListInit *TypeList = R->getValueAsListInit("RetTypes");
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for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
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Record *TyEl = TypeList->getElementAsRecord(i);
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assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
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MVT::SimpleValueType VT;
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if (TyEl->isSubClassOf("LLVMMatchType")) {
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unsigned MatchTy = TyEl->getValueAsInt("Number");
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assert(MatchTy < OverloadedVTs.size() &&
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"Invalid matching number!");
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VT = OverloadedVTs[MatchTy];
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// It only makes sense to use the extended and truncated vector element
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// variants with iAny types; otherwise, if the intrinsic is not
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// overloaded, all the types can be specified directly.
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assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
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!TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
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VT == MVT::iAny) && "Expected iAny type");
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} else {
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VT = getValueType(TyEl->getValueAsDef("VT"));
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}
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if (VT == MVT::iAny || VT == MVT::fAny || VT == MVT::iPTRAny) {
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OverloadedVTs.push_back(VT);
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isOverloaded |= true;
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}
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IS.RetVTs.push_back(VT);
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IS.RetTypeDefs.push_back(TyEl);
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}
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if (IS.RetVTs.size() == 0)
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throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
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// Parse the list of parameter types.
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TypeList = R->getValueAsListInit("ParamTypes");
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for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
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Record *TyEl = TypeList->getElementAsRecord(i);
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assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
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MVT::SimpleValueType VT;
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if (TyEl->isSubClassOf("LLVMMatchType")) {
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unsigned MatchTy = TyEl->getValueAsInt("Number");
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assert(MatchTy < OverloadedVTs.size() &&
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"Invalid matching number!");
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VT = OverloadedVTs[MatchTy];
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// It only makes sense to use the extended and truncated vector element
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// variants with iAny types; otherwise, if the intrinsic is not
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// overloaded, all the types can be specified directly.
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assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
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!TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
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VT == MVT::iAny) && "Expected iAny type");
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} else
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VT = getValueType(TyEl->getValueAsDef("VT"));
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if (VT == MVT::iAny || VT == MVT::fAny || VT == MVT::iPTRAny) {
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OverloadedVTs.push_back(VT);
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isOverloaded |= true;
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}
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IS.ParamVTs.push_back(VT);
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IS.ParamTypeDefs.push_back(TyEl);
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}
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// Parse the intrinsic properties.
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ListInit *PropList = R->getValueAsListInit("Properties");
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for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
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Record *Property = PropList->getElementAsRecord(i);
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assert(Property->isSubClassOf("IntrinsicProperty") &&
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"Expected a property!");
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if (Property->getName() == "IntrNoMem")
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ModRef = NoMem;
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else if (Property->getName() == "IntrReadArgMem")
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ModRef = ReadArgMem;
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else if (Property->getName() == "IntrReadMem")
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ModRef = ReadMem;
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else if (Property->getName() == "IntrWriteArgMem")
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ModRef = WriteArgMem;
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else if (Property->getName() == "IntrWriteMem")
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ModRef = WriteMem;
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else if (Property->getName() == "Commutative")
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isCommutative = true;
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else if (Property->isSubClassOf("NoCapture")) {
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unsigned ArgNo = Property->getValueAsInt("ArgNo");
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ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
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} else
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assert(0 && "Unknown property!");
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}
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}
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