mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-19 01:34:32 +00:00
f124b46b4f
validate the prototype of intrinsic functions. This prevents GCC from going crazy and inlining too much stuff, eventually running out of memory. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27283 91177308-0d34-0410-b5e6-96231b3b80d8
288 lines
10 KiB
C++
288 lines
10 KiB
C++
//===- 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"
|
|
#include <algorithm>
|
|
using namespace llvm;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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 intrinsic ID -> name table.
|
|
EmitIntrinsicToNameTable(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 table of non-memory accessing intrinsics.
|
|
EmitNoMemoryInfo(Ints, OS);
|
|
|
|
// Emit side effect info for each intrinsic.
|
|
EmitSideEffectInfo(Ints, OS);
|
|
|
|
// Emit a list of intrinsics with corresponding GCC builtins.
|
|
EmitGCCBuiltinList(Ints, OS);
|
|
|
|
// Emit code to translate GCC builtins into LLVM intrinsics.
|
|
EmitIntrinsicToGCCBuiltinMap(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) {
|
|
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";
|
|
}
|
|
|
|
void IntrinsicEmitter::
|
|
EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
|
|
std::ostream &OS) {
|
|
OS << "// Intrinsic ID to name table\n";
|
|
OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
|
|
OS << " // Note that entry #0 is the invalid intrinsic!\n";
|
|
for (unsigned i = 0, e = Ints.size(); i != e; ++i)
|
|
OS << " \"" << Ints[i].Name << "\",\n";
|
|
OS << "#endif\n\n";
|
|
}
|
|
|
|
static void EmitTypeVerify(std::ostream &OS, Record *ArgType) {
|
|
OS << "(int)" << ArgType->getValueAsString("TypeVal") << ", ";
|
|
|
|
// If this is a packed type, check that the subtype and size are correct.
|
|
if (ArgType->isSubClassOf("LLVMPackedType")) {
|
|
Record *SubType = ArgType->getValueAsDef("ElTy");
|
|
OS << "(int)" << SubType->getValueAsString("TypeVal") << ", "
|
|
<< ArgType->getValueAsInt("NumElts") << ", ";
|
|
}
|
|
}
|
|
|
|
/// RecordListComparator - Provide a determinstic comparator for lists of
|
|
/// records.
|
|
namespace {
|
|
struct RecordListComparator {
|
|
bool operator()(const std::vector<Record*> &LHS,
|
|
const std::vector<Record*> &RHS) const {
|
|
unsigned i = 0;
|
|
do {
|
|
if (i == RHS.size()) return false; // RHS is shorter than LHS.
|
|
if (LHS[i] != RHS[i])
|
|
return LHS[i]->getName() < RHS[i]->getName();
|
|
} while (++i != LHS.size());
|
|
|
|
return i != RHS.size();
|
|
}
|
|
};
|
|
}
|
|
|
|
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";
|
|
|
|
// This checking can emit a lot of very common code. To reduce the amount of
|
|
// code that we emit, batch up cases that have identical types. This avoids
|
|
// problems where GCC can run out of memory compiling Verifier.cpp.
|
|
typedef std::map<std::vector<Record*>, std::vector<unsigned>,
|
|
RecordListComparator> MapTy;
|
|
MapTy UniqueArgInfos;
|
|
|
|
// Compute the unique argument type info.
|
|
for (unsigned i = 0, e = Ints.size(); i != e; ++i)
|
|
UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
|
|
|
|
// Loop through the array, emitting one comparison for each batch.
|
|
for (MapTy::iterator I = UniqueArgInfos.begin(),
|
|
E = UniqueArgInfos.end(); I != E; ++I) {
|
|
for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
|
|
OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
|
|
<< Ints[I->second[i]].Name << "\n";
|
|
}
|
|
|
|
const std::vector<Record*> &ArgTypes = I->first;
|
|
OS << " VerifyIntrinsicPrototype(IF, ";
|
|
for (unsigned j = 0; j != ArgTypes.size(); ++j)
|
|
EmitTypeVerify(OS, ArgTypes[j]);
|
|
OS << "-1);\n";
|
|
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::
|
|
EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
|
|
OS << "// SelectionDAGIsel code.\n";
|
|
OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
|
|
OS << " switch (IntrinsicID) {\n";
|
|
OS << " default: break;\n";
|
|
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
|
|
switch (Ints[i].ModRef) {
|
|
default: break;
|
|
case CodeGenIntrinsic::NoMem:
|
|
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::
|
|
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";
|
|
}
|
|
|
|
void IntrinsicEmitter::
|
|
EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
|
|
std::ostream &OS) {
|
|
typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
|
|
BIMTy BuiltinMap;
|
|
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
|
|
if (!Ints[i].GCCBuiltinName.empty()) {
|
|
std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
|
|
Ints[i].TargetPrefix);
|
|
if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
|
|
throw "Intrinsic '" + Ints[i].TheDef->getName() +
|
|
"': duplicate GCC builtin name!";
|
|
}
|
|
}
|
|
|
|
OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
|
|
OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
|
|
OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
|
|
OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
|
|
OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
|
|
OS << " if (0);\n";
|
|
// Note: this could emit significantly better code if we cared.
|
|
for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
|
|
OS << " else if (";
|
|
if (!I->first.second.empty()) {
|
|
// Emit this as a strcmp, so it can be constant folded by the FE.
|
|
OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
|
|
<< " ";
|
|
}
|
|
OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
|
|
OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
|
|
}
|
|
OS << " else\n";
|
|
OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
|
|
OS << "#endif\n\n";
|
|
}
|