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//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend emits information about intrinsic functions.
//
//===----------------------------------------------------------------------===//
#include "IntrinsicEmitter.h"
#include "Record.h"
#include "llvm/ADT/StringExtras.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// CodeGenIntrinsic Implementation
//===----------------------------------------------------------------------===//
std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
}
CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
std::string DefName = R->getName();
ModRef = WriteMem;
if (DefName.size() <= 4 ||
std::string(DefName.begin(), DefName.begin()+4) != "int_")
throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
EnumName = std::string(DefName.begin()+4, DefName.end());
GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
Name = R->getValueAsString("LLVMName");
if (Name == "") {
// If an explicit name isn't specified, derive one from the DefName.
Name = "llvm.";
for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
if (EnumName[i] == '_')
Name += '.';
else
Name += EnumName[i];
}
// Parse the list of argument types.
ListInit *TypeList = R->getValueAsListInit("Types");
for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
DefInit *DI = dynamic_cast<DefInit*>(TypeList->getElement(i));
assert(DI && "Invalid list type!");
Record *TyEl = DI->getDef();
assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
ArgTypes.push_back(TyEl->getValueAsString("TypeVal"));
ArgTypeDefs.push_back(TyEl);
}
if (ArgTypes.size() == 0)
throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
// Parse the intrinsic properties.
ListInit *PropList = R->getValueAsListInit("Properties");
for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
DefInit *DI = dynamic_cast<DefInit*>(PropList->getElement(i));
assert(DI && "Invalid list type!");
Record *Property = DI->getDef();
assert(Property->isSubClassOf("IntrinsicProperty") &&
"Expected a property!");
if (Property->getName() == "InstrNoMem")
ModRef = NoMem;
else if (Property->getName() == "InstrReadArgMem")
ModRef = ReadArgMem;
else if (Property->getName() == "IntrReadMem")
ModRef = ReadMem;
else if (Property->getName() == "InstrWriteArgMem")
ModRef = WriteArgMem;
else if (Property->getName() == "IntrWriteMem")
ModRef = WriteMem;
else
assert(0 && "Unknown property!");
}
}
//===----------------------------------------------------------------------===//
// IntrinsicEmitter Implementation
//===----------------------------------------------------------------------===//
void IntrinsicEmitter::run(std::ostream &OS) {
EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
// Emit the enum information.
EmitEnumInfo(Ints, OS);
// Emit the function name recognizer.
EmitFnNameRecognizer(Ints, OS);
// Emit the intrinsic verifier.
EmitVerifier(Ints, OS);
// Emit mod/ref info for each function.
EmitModRefInfo(Ints, OS);
// Emit side effect info for each function.
EmitSideEffectInfo(Ints, OS);
// Emit a list of intrinsics with corresponding GCC builtins.
EmitGCCBuiltinList(Ints, OS);
}
void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
OS << "// Enum values for Intrinsics.h\n";
OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
OS << " " << Ints[i].EnumName;
OS << ((i != e-1) ? ", " : " ");
OS << std::string(40-Ints[i].EnumName.size(), ' ')
<< "// " << Ints[i].Name << "\n";
}
OS << "#endif\n\n";
}
void IntrinsicEmitter::
EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
// Build a function name -> intrinsic name mapping.
std::map<std::string, std::string> IntMapping;
for (unsigned i = 0, e = Ints.size(); i != e; ++i)
IntMapping[Ints[i].Name] = Ints[i].EnumName;
OS << "// Function name -> enum value recognizer code.\n";
OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
OS << " switch (Name[5]) {\n";
OS << " default: break;\n";
// Emit the intrinsics in sorted order.
char LastChar = 0;
for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
E = IntMapping.end(); I != E; ++I) {
assert(I->first.size() > 5 && std::string(I->first.begin(),
I->first.begin()+5) == "llvm." &&
"Invalid intrinsic name!");
if (I->first[5] != LastChar) {
LastChar = I->first[5];
OS << " case '" << LastChar << "':\n";
}
OS << " if (Name == \"" << I->first << "\") return Intrinsic::"
<< I->second << ";\n";
}
OS << " }\n";
OS << " // The 'llvm.' namespace is reserved!\n";
OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n";
OS << "#endif\n\n";
}
static void EmitTypeVerify(std::ostream &OS, const std::string &Val,
Record *ArgType) {
OS << " Assert1(" << Val << "->getTypeID() == "
<< ArgType->getValueAsString("TypeVal") << ",\n"
<< " \"Illegal intrinsic type!\", IF);\n";
// If this is a packed type, check that the subtype and size are correct.
if (ArgType->isSubClassOf("LLVMPackedType")) {
Record *SubType = ArgType->getValueAsDef("ElTy");
OS << " Assert1(cast<PackedType>(" << Val
<< ")->getElementType()->getTypeID() == "
<< SubType->getValueAsString("TypeVal") << ",\n"
<< " \"Illegal intrinsic type!\", IF);\n";
OS << " Assert1(cast<PackedType>(" << Val << ")->getNumElements() == "
<< ArgType->getValueAsInt("NumElts") << ",\n"
<< " \"Illegal intrinsic type!\", IF);\n";
}
}
void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
OS << " switch (ID) {\n";
OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
OS << " case Intrinsic::" << Ints[i].EnumName << ":\t\t// "
<< Ints[i].Name << "\n";
OS << " Assert1(FTy->getNumParams() == " << Ints[i].ArgTypes.size()-1
<< ",\n"
<< " \"Illegal # arguments for intrinsic function!\", IF);\n";
EmitTypeVerify(OS, "FTy->getReturnType()", Ints[i].ArgTypeDefs[0]);
for (unsigned j = 1; j != Ints[i].ArgTypes.size(); ++j)
EmitTypeVerify(OS, "FTy->getParamType(" + utostr(j-1) + ")",
Ints[i].ArgTypeDefs[j]);
OS << " break;\n";
}
OS << " }\n";
OS << "#endif\n\n";
}
void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
OS << "// BasicAliasAnalysis code.\n";
OS << "#ifdef GET_MODREF_BEHAVIOR\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
switch (Ints[i].ModRef) {
default: break;
case CodeGenIntrinsic::NoMem:
OS << " NoMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
break;
case CodeGenIntrinsic::ReadArgMem:
case CodeGenIntrinsic::ReadMem:
OS << " OnlyReadsMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
break;
}
}
OS << "#endif\n\n";
}
void IntrinsicEmitter::
EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
OS << "// isInstructionTriviallyDead code.\n";
OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
OS << " switch (F->getIntrinsicID()) {\n";
OS << " default: break;\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
switch (Ints[i].ModRef) {
default: break;
case CodeGenIntrinsic::NoMem:
case CodeGenIntrinsic::ReadArgMem:
case CodeGenIntrinsic::ReadMem:
OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
break;
}
}
OS << " return true; // These intrinsics have no side effects.\n";
OS << " }\n";
OS << "#endif\n\n";
}
void IntrinsicEmitter::
EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
OS << " switch (F->getIntrinsicID()) {\n";
OS << " default: BuiltinName = \"\"; break;\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
if (!Ints[i].GCCBuiltinName.empty()) {
OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
<< Ints[i].GCCBuiltinName << "\"; break;\n";
}
}
OS << " }\n";
OS << "#endif\n\n";
}
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