mirror of
https://github.com/c64scene-ar/llvm-6502.git
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0da3130a98
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26784 91177308-0d34-0410-b5e6-96231b3b80d8
329 lines
12 KiB
C++
329 lines
12 KiB
C++
//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend emits information about intrinsic functions.
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//
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//===----------------------------------------------------------------------===//
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#include "IntrinsicEmitter.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include <algorithm>
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using namespace llvm;
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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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std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
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return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
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}
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CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
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std::string DefName = R->getName();
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ModRef = WriteMem;
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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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if (EnumName[i] == '_')
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Name += '.';
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else
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Name += 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 argument types.
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ListInit *TypeList = R->getValueAsListInit("Types");
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for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
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DefInit *DI = dynamic_cast<DefInit*>(TypeList->getElement(i));
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assert(DI && "Invalid list type!");
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Record *TyEl = DI->getDef();
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assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
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ArgTypes.push_back(TyEl->getValueAsString("TypeVal"));
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ArgTypeDefs.push_back(TyEl);
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}
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if (ArgTypes.size() == 0)
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throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
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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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DefInit *DI = dynamic_cast<DefInit*>(PropList->getElement(i));
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assert(DI && "Invalid list type!");
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Record *Property = DI->getDef();
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assert(Property->isSubClassOf("IntrinsicProperty") &&
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"Expected a property!");
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if (Property->getName() == "InstrNoMem")
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ModRef = NoMem;
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else if (Property->getName() == "InstrReadArgMem")
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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() == "InstrWriteArgMem")
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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
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assert(0 && "Unknown property!");
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}
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}
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//===----------------------------------------------------------------------===//
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// IntrinsicEmitter Implementation
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//===----------------------------------------------------------------------===//
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void IntrinsicEmitter::run(std::ostream &OS) {
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EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
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std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
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// Emit the enum information.
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EmitEnumInfo(Ints, OS);
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// Emit the intrinsic ID -> name table.
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EmitIntrinsicToNameTable(Ints, OS);
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// Emit the function name recognizer.
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EmitFnNameRecognizer(Ints, OS);
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// Emit the intrinsic verifier.
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EmitVerifier(Ints, OS);
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// Emit mod/ref info for each function.
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EmitModRefInfo(Ints, OS);
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// Emit side effect info for each function.
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EmitSideEffectInfo(Ints, OS);
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// Emit a list of intrinsics with corresponding GCC builtins.
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EmitGCCBuiltinList(Ints, OS);
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// Emit code to translate GCC builtins into LLVM intrinsics.
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EmitIntrinsicToGCCBuiltinMap(Ints, OS);
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}
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void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Enum values for Intrinsics.h\n";
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OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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OS << " " << Ints[i].EnumName;
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OS << ((i != e-1) ? ", " : " ");
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OS << std::string(40-Ints[i].EnumName.size(), ' ')
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<< "// " << Ints[i].Name << "\n";
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}
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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// Build a function name -> intrinsic name mapping.
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std::map<std::string, std::string> IntMapping;
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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IntMapping[Ints[i].Name] = Ints[i].EnumName;
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OS << "// Function name -> enum value recognizer code.\n";
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OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
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OS << " switch (Name[5]) {\n";
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OS << " default: break;\n";
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// Emit the intrinsics in sorted order.
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char LastChar = 0;
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for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
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E = IntMapping.end(); I != E; ++I) {
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if (I->first[5] != LastChar) {
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LastChar = I->first[5];
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OS << " case '" << LastChar << "':\n";
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}
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OS << " if (Name == \"" << I->first << "\") return Intrinsic::"
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<< I->second << ";\n";
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}
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OS << " }\n";
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OS << " // The 'llvm.' namespace is reserved!\n";
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OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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std::vector<std::string> Names;
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for (unsigned i = 0, e = Ints.size(); i != e; ++i)
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Names.push_back(Ints[i].Name);
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std::sort(Names.begin(), Names.end());
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OS << "// Intrinsic ID to name table\n";
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OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
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OS << " // Note that entry #0 is the invalid intrinsic!\n";
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for (unsigned i = 0, e = Names.size(); i != e; ++i)
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OS << " \"" << Names[i] << "\",\n";
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OS << "#endif\n\n";
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}
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static void EmitTypeVerify(std::ostream &OS, const std::string &Val,
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Record *ArgType) {
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OS << " Assert1(" << Val << "->getTypeID() == "
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<< ArgType->getValueAsString("TypeVal") << ",\n"
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<< " \"Illegal intrinsic type!\", IF);\n";
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// If this is a packed type, check that the subtype and size are correct.
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if (ArgType->isSubClassOf("LLVMPackedType")) {
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Record *SubType = ArgType->getValueAsDef("ElTy");
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OS << " Assert1(cast<PackedType>(" << Val
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<< ")->getElementType()->getTypeID() == "
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<< SubType->getValueAsString("TypeVal") << ",\n"
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<< " \"Illegal intrinsic type!\", IF);\n";
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OS << " Assert1(cast<PackedType>(" << Val << ")->getNumElements() == "
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<< ArgType->getValueAsInt("NumElts") << ",\n"
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<< " \"Illegal intrinsic type!\", IF);\n";
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}
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}
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void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
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OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
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OS << " switch (ID) {\n";
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OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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OS << " case Intrinsic::" << Ints[i].EnumName << ":\t\t// "
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<< Ints[i].Name << "\n";
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OS << " Assert1(FTy->getNumParams() == " << Ints[i].ArgTypes.size()-1
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<< ",\n"
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<< " \"Illegal # arguments for intrinsic function!\", IF);\n";
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EmitTypeVerify(OS, "FTy->getReturnType()", Ints[i].ArgTypeDefs[0]);
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for (unsigned j = 1; j != Ints[i].ArgTypes.size(); ++j)
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EmitTypeVerify(OS, "FTy->getParamType(" + utostr(j-1) + ")",
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Ints[i].ArgTypeDefs[j]);
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OS << " break;\n";
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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OS << "// BasicAliasAnalysis code.\n";
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OS << "#ifdef GET_MODREF_BEHAVIOR\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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switch (Ints[i].ModRef) {
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default: break;
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case CodeGenIntrinsic::NoMem:
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OS << " NoMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
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break;
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case CodeGenIntrinsic::ReadArgMem:
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case CodeGenIntrinsic::ReadMem:
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OS << " OnlyReadsMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
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break;
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}
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}
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
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OS << "// isInstructionTriviallyDead code.\n";
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OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
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OS << " switch (F->getIntrinsicID()) {\n";
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OS << " default: break;\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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switch (Ints[i].ModRef) {
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default: break;
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case CodeGenIntrinsic::NoMem:
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case CodeGenIntrinsic::ReadArgMem:
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case CodeGenIntrinsic::ReadMem:
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OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
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break;
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}
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}
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OS << " return true; // These intrinsics have no side effects.\n";
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
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OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
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OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
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OS << " switch (F->getIntrinsicID()) {\n";
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OS << " default: BuiltinName = \"\"; break;\n";
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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if (!Ints[i].GCCBuiltinName.empty()) {
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OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
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<< Ints[i].GCCBuiltinName << "\"; break;\n";
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}
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}
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OS << " }\n";
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OS << "#endif\n\n";
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}
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void IntrinsicEmitter::
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EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
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std::ostream &OS) {
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typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
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BIMTy BuiltinMap;
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for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
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if (!Ints[i].GCCBuiltinName.empty()) {
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std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
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Ints[i].TargetPrefix);
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if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
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throw "Intrinsic '" + Ints[i].TheDef->getName() +
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"': duplicate GCC builtin name!";
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}
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}
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OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
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OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
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OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
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OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
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OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
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OS << " if (0);\n";
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// Note: this could emit significantly better code if we cared.
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for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
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OS << " else if (";
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if (!I->first.second.empty()) {
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// Emit this as a strcmp, so it can be constant folded by the FE.
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OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
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<< " ";
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}
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OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
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OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
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}
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OS << " else\n";
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OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
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OS << "#endif\n\n";
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}
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