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llvm-for-llvmta/utils/TableGen/SearchableTableEmitter.cpp

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//===- SearchableTableEmitter.cpp - Generate efficiently searchable tables -==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend emits a generic array initialized by specified fields,
// together with companion index tables and lookup functions (binary search,
// currently).
//
//===----------------------------------------------------------------------===//
#include "CodeGenIntrinsics.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <algorithm>
#include <set>
#include <string>
#include <vector>
using namespace llvm;
#define DEBUG_TYPE "searchable-table-emitter"
namespace {
struct GenericTable;
int getAsInt(Init *B) {
return cast<IntInit>(B->convertInitializerTo(IntRecTy::get()))->getValue();
}
int getInt(Record *R, StringRef Field) {
return getAsInt(R->getValueInit(Field));
}
struct GenericEnum {
using Entry = std::pair<StringRef, int64_t>;
std::string Name;
Record *Class = nullptr;
std::string PreprocessorGuard;
std::vector<std::unique_ptr<Entry>> Entries;
DenseMap<Record *, Entry *> EntryMap;
};
struct GenericField {
std::string Name;
RecTy *RecType = nullptr;
bool IsCode = false;
bool IsIntrinsic = false;
bool IsInstruction = false;
GenericEnum *Enum = nullptr;
GenericField(StringRef Name) : Name(std::string(Name)) {}
};
struct SearchIndex {
std::string Name;
SMLoc Loc; // Source location of PrimaryKey or Key field definition.
SmallVector<GenericField, 1> Fields;
bool EarlyOut = false;
};
struct GenericTable {
std::string Name;
ArrayRef<SMLoc> Locs; // Source locations from the Record instance.
std::string PreprocessorGuard;
std::string CppTypeName;
SmallVector<GenericField, 2> Fields;
std::vector<Record *> Entries;
std::unique_ptr<SearchIndex> PrimaryKey;
SmallVector<std::unique_ptr<SearchIndex>, 2> Indices;
const GenericField *getFieldByName(StringRef Name) const {
for (const auto &Field : Fields) {
if (Name == Field.Name)
return &Field;
}
return nullptr;
}
};
class SearchableTableEmitter {
RecordKeeper &Records;
DenseMap<Init *, std::unique_ptr<CodeGenIntrinsic>> Intrinsics;
std::vector<std::unique_ptr<GenericEnum>> Enums;
DenseMap<Record *, GenericEnum *> EnumMap;
std::set<std::string> PreprocessorGuards;
public:
SearchableTableEmitter(RecordKeeper &R) : Records(R) {}
void run(raw_ostream &OS);
private:
typedef std::pair<Init *, int> SearchTableEntry;
enum TypeContext {
TypeInStaticStruct,
TypeInTempStruct,
TypeInArgument,
};
std::string primaryRepresentation(SMLoc Loc, const GenericField &Field,
Init *I) {
if (StringInit *SI = dyn_cast<StringInit>(I)) {
if (Field.IsCode || SI->hasCodeFormat())
return std::string(SI->getValue());
else
return SI->getAsString();
} else if (BitsInit *BI = dyn_cast<BitsInit>(I))
return "0x" + utohexstr(getAsInt(BI));
else if (BitInit *BI = dyn_cast<BitInit>(I))
return BI->getValue() ? "true" : "false";
else if (Field.IsIntrinsic)
return "Intrinsic::" + getIntrinsic(I).EnumName;
else if (Field.IsInstruction)
return I->getAsString();
else if (Field.Enum) {
auto *Entry = Field.Enum->EntryMap[cast<DefInit>(I)->getDef()];
if (!Entry)
PrintFatalError(Loc,
Twine("Entry for field '") + Field.Name + "' is null");
return std::string(Entry->first);
}
PrintFatalError(Loc, Twine("invalid field type for field '") + Field.Name +
"'; expected: bit, bits, string, or code");
}
bool isIntrinsic(Init *I) {
if (DefInit *DI = dyn_cast<DefInit>(I))
return DI->getDef()->isSubClassOf("Intrinsic");
return false;
}
CodeGenIntrinsic &getIntrinsic(Init *I) {
std::unique_ptr<CodeGenIntrinsic> &Intr = Intrinsics[I];
if (!Intr)
Intr = std::make_unique<CodeGenIntrinsic>(cast<DefInit>(I)->getDef(),
std::vector<Record *>());
return *Intr;
}
bool compareBy(Record *LHS, Record *RHS, const SearchIndex &Index);
std::string searchableFieldType(const GenericTable &Table,
const SearchIndex &Index,
const GenericField &Field, TypeContext Ctx) {
if (isa<StringRecTy>(Field.RecType)) {
if (Ctx == TypeInStaticStruct)
return "const char *";
if (Ctx == TypeInTempStruct)
return "std::string";
return "StringRef";
} else if (BitsRecTy *BI = dyn_cast<BitsRecTy>(Field.RecType)) {
unsigned NumBits = BI->getNumBits();
if (NumBits <= 8)
return "uint8_t";
if (NumBits <= 16)
return "uint16_t";
if (NumBits <= 32)
return "uint32_t";
if (NumBits <= 64)
return "uint64_t";
PrintFatalError(Index.Loc, Twine("In table '") + Table.Name +
"' lookup method '" + Index.Name +
"', key field '" + Field.Name +
"' of type bits is too large");
} else if (Field.Enum || Field.IsIntrinsic || Field.IsInstruction)
return "unsigned";
PrintFatalError(Index.Loc,
Twine("In table '") + Table.Name + "' lookup method '" +
Index.Name + "', key field '" + Field.Name +
"' has invalid type: " + Field.RecType->getAsString());
}
void emitGenericTable(const GenericTable &Table, raw_ostream &OS);
void emitGenericEnum(const GenericEnum &Enum, raw_ostream &OS);
void emitLookupDeclaration(const GenericTable &Table,
const SearchIndex &Index, raw_ostream &OS);
void emitLookupFunction(const GenericTable &Table, const SearchIndex &Index,
bool IsPrimary, raw_ostream &OS);
void emitIfdef(StringRef Guard, raw_ostream &OS);
bool parseFieldType(GenericField &Field, Init *II);
std::unique_ptr<SearchIndex>
parseSearchIndex(GenericTable &Table, const RecordVal *RecVal, StringRef Name,
const std::vector<StringRef> &Key, bool EarlyOut);
void collectEnumEntries(GenericEnum &Enum, StringRef NameField,
StringRef ValueField,
const std::vector<Record *> &Items);
void collectTableEntries(GenericTable &Table,
const std::vector<Record *> &Items);
};
} // End anonymous namespace.
// For search indices that consists of a single field whose numeric value is
// known, return that numeric value.
static int64_t getNumericKey(const SearchIndex &Index, Record *Rec) {
assert(Index.Fields.size() == 1);
if (Index.Fields[0].Enum) {
Record *EnumEntry = Rec->getValueAsDef(Index.Fields[0].Name);
return Index.Fields[0].Enum->EntryMap[EnumEntry]->second;
}
return getInt(Rec, Index.Fields[0].Name);
}
/// Less-than style comparison between \p LHS and \p RHS according to the
/// key of \p Index.
bool SearchableTableEmitter::compareBy(Record *LHS, Record *RHS,
const SearchIndex &Index) {
for (const auto &Field : Index.Fields) {
Init *LHSI = LHS->getValueInit(Field.Name);
Init *RHSI = RHS->getValueInit(Field.Name);
if (isa<BitsRecTy>(Field.RecType) || isa<IntRecTy>(Field.RecType)) {
int64_t LHSi = getAsInt(LHSI);
int64_t RHSi = getAsInt(RHSI);
if (LHSi < RHSi)
return true;
if (LHSi > RHSi)
return false;
} else if (Field.IsIntrinsic) {
CodeGenIntrinsic &LHSi = getIntrinsic(LHSI);
CodeGenIntrinsic &RHSi = getIntrinsic(RHSI);
if (std::tie(LHSi.TargetPrefix, LHSi.Name) <
std::tie(RHSi.TargetPrefix, RHSi.Name))
return true;
if (std::tie(LHSi.TargetPrefix, LHSi.Name) >
std::tie(RHSi.TargetPrefix, RHSi.Name))
return false;
} else if (Field.IsInstruction) {
// This does not correctly compare the predefined instructions!
Record *LHSr = cast<DefInit>(LHSI)->getDef();
Record *RHSr = cast<DefInit>(RHSI)->getDef();
bool LHSpseudo = LHSr->getValueAsBit("isPseudo");
bool RHSpseudo = RHSr->getValueAsBit("isPseudo");
if (LHSpseudo && !RHSpseudo)
return true;
if (!LHSpseudo && RHSpseudo)
return false;
int comp = LHSr->getName().compare(RHSr->getName());
if (comp < 0)
return true;
if (comp > 0)
return false;
} else if (Field.Enum) {
auto LHSr = cast<DefInit>(LHSI)->getDef();
auto RHSr = cast<DefInit>(RHSI)->getDef();
int64_t LHSv = Field.Enum->EntryMap[LHSr]->second;
int64_t RHSv = Field.Enum->EntryMap[RHSr]->second;
if (LHSv < RHSv)
return true;
if (LHSv > RHSv)
return false;
} else {
std::string LHSs = primaryRepresentation(Index.Loc, Field, LHSI);
std::string RHSs = primaryRepresentation(Index.Loc, Field, RHSI);
if (isa<StringRecTy>(Field.RecType)) {
LHSs = StringRef(LHSs).upper();
RHSs = StringRef(RHSs).upper();
}
int comp = LHSs.compare(RHSs);
if (comp < 0)
return true;
if (comp > 0)
return false;
}
}
return false;
}
void SearchableTableEmitter::emitIfdef(StringRef Guard, raw_ostream &OS) {
OS << "#ifdef " << Guard << "\n";
PreprocessorGuards.insert(std::string(Guard));
}
/// Emit a generic enum.
void SearchableTableEmitter::emitGenericEnum(const GenericEnum &Enum,
raw_ostream &OS) {
emitIfdef((Twine("GET_") + Enum.PreprocessorGuard + "_DECL").str(), OS);
OS << "enum " << Enum.Name << " {\n";
for (const auto &Entry : Enum.Entries)
OS << " " << Entry->first << " = " << Entry->second << ",\n";
OS << "};\n";
OS << "#endif\n\n";
}
void SearchableTableEmitter::emitLookupFunction(const GenericTable &Table,
const SearchIndex &Index,
bool IsPrimary,
raw_ostream &OS) {
OS << "\n";
emitLookupDeclaration(Table, Index, OS);
OS << " {\n";
std::vector<Record *> IndexRowsStorage;
ArrayRef<Record *> IndexRows;
StringRef IndexTypeName;
StringRef IndexName;
if (IsPrimary) {
IndexTypeName = Table.CppTypeName;
IndexName = Table.Name;
IndexRows = Table.Entries;
} else {
OS << " struct IndexType {\n";
for (const auto &Field : Index.Fields) {
OS << " "
<< searchableFieldType(Table, Index, Field, TypeInStaticStruct) << " "
<< Field.Name << ";\n";
}
OS << " unsigned _index;\n";
OS << " };\n";
OS << " static const struct IndexType Index[] = {\n";
std::vector<std::pair<Record *, unsigned>> Entries;
Entries.reserve(Table.Entries.size());
for (unsigned i = 0; i < Table.Entries.size(); ++i)
Entries.emplace_back(Table.Entries[i], i);
llvm::stable_sort(Entries, [&](const std::pair<Record *, unsigned> &LHS,
const std::pair<Record *, unsigned> &RHS) {
return compareBy(LHS.first, RHS.first, Index);
});
IndexRowsStorage.reserve(Entries.size());
for (const auto &Entry : Entries) {
IndexRowsStorage.push_back(Entry.first);
OS << " { ";
bool NeedComma = false;
for (const auto &Field : Index.Fields) {
if (NeedComma)
OS << ", ";
NeedComma = true;
std::string Repr = primaryRepresentation(
Index.Loc, Field, Entry.first->getValueInit(Field.Name));
if (isa<StringRecTy>(Field.RecType))
Repr = StringRef(Repr).upper();
OS << Repr;
}
OS << ", " << Entry.second << " },\n";
}
OS << " };\n\n";
IndexTypeName = "IndexType";
IndexName = "Index";
IndexRows = IndexRowsStorage;
}
bool IsContiguous = false;
if (Index.Fields.size() == 1 &&
(Index.Fields[0].Enum || isa<BitsRecTy>(Index.Fields[0].RecType))) {
IsContiguous = true;
for (unsigned i = 0; i < IndexRows.size(); ++i) {
if (getNumericKey(Index, IndexRows[i]) != i) {
IsContiguous = false;
break;
}
}
}
if (IsContiguous) {
OS << " auto Table = makeArrayRef(" << IndexName << ");\n";
OS << " size_t Idx = " << Index.Fields[0].Name << ";\n";
OS << " return Idx >= Table.size() ? nullptr : ";
if (IsPrimary)
OS << "&Table[Idx]";
else
OS << "&" << Table.Name << "[Table[Idx]._index]";
OS << ";\n";
OS << "}\n";
return;
}
if (Index.EarlyOut) {
const GenericField &Field = Index.Fields[0];
std::string FirstRepr = primaryRepresentation(
Index.Loc, Field, IndexRows[0]->getValueInit(Field.Name));
std::string LastRepr = primaryRepresentation(
Index.Loc, Field, IndexRows.back()->getValueInit(Field.Name));
OS << " if ((" << Field.Name << " < " << FirstRepr << ") ||\n";
OS << " (" << Field.Name << " > " << LastRepr << "))\n";
OS << " return nullptr;\n\n";
}
OS << " struct KeyType {\n";
for (const auto &Field : Index.Fields) {
OS << " " << searchableFieldType(Table, Index, Field, TypeInTempStruct)
<< " " << Field.Name << ";\n";
}
OS << " };\n";
OS << " KeyType Key = {";
bool NeedComma = false;
for (const auto &Field : Index.Fields) {
if (NeedComma)
OS << ", ";
NeedComma = true;
OS << Field.Name;
if (isa<StringRecTy>(Field.RecType)) {
OS << ".upper()";
if (IsPrimary)
PrintFatalError(Index.Loc,
Twine("In table '") + Table.Name +
"', use a secondary lookup method for "
"case-insensitive comparison of field '" +
Field.Name + "'");
}
}
OS << "};\n";
OS << " auto Table = makeArrayRef(" << IndexName << ");\n";
OS << " auto Idx = std::lower_bound(Table.begin(), Table.end(), Key,\n";
OS << " [](const " << IndexTypeName << " &LHS, const KeyType &RHS) {\n";
for (const auto &Field : Index.Fields) {
if (isa<StringRecTy>(Field.RecType)) {
OS << " int Cmp" << Field.Name << " = StringRef(LHS." << Field.Name
<< ").compare(RHS." << Field.Name << ");\n";
OS << " if (Cmp" << Field.Name << " < 0) return true;\n";
OS << " if (Cmp" << Field.Name << " > 0) return false;\n";
} else if (Field.Enum) {
// Explicitly cast to unsigned, because the signedness of enums is
// compiler-dependent.
OS << " if ((unsigned)LHS." << Field.Name << " < (unsigned)RHS."
<< Field.Name << ")\n";
OS << " return true;\n";
OS << " if ((unsigned)LHS." << Field.Name << " > (unsigned)RHS."
<< Field.Name << ")\n";
OS << " return false;\n";
} else {
OS << " if (LHS." << Field.Name << " < RHS." << Field.Name << ")\n";
OS << " return true;\n";
OS << " if (LHS." << Field.Name << " > RHS." << Field.Name << ")\n";
OS << " return false;\n";
}
}
OS << " return false;\n";
OS << " });\n\n";
OS << " if (Idx == Table.end()";
for (const auto &Field : Index.Fields)
OS << " ||\n Key." << Field.Name << " != Idx->" << Field.Name;
OS << ")\n return nullptr;\n";
if (IsPrimary)
OS << " return &*Idx;\n";
else
OS << " return &" << Table.Name << "[Idx->_index];\n";
OS << "}\n";
}
void SearchableTableEmitter::emitLookupDeclaration(const GenericTable &Table,
const SearchIndex &Index,
raw_ostream &OS) {
OS << "const " << Table.CppTypeName << " *" << Index.Name << "(";
bool NeedComma = false;
for (const auto &Field : Index.Fields) {
if (NeedComma)
OS << ", ";
NeedComma = true;
OS << searchableFieldType(Table, Index, Field, TypeInArgument) << " "
<< Field.Name;
}
OS << ")";
}
void SearchableTableEmitter::emitGenericTable(const GenericTable &Table,
raw_ostream &OS) {
emitIfdef((Twine("GET_") + Table.PreprocessorGuard + "_DECL").str(), OS);
// Emit the declarations for the functions that will perform lookup.
if (Table.PrimaryKey) {
emitLookupDeclaration(Table, *Table.PrimaryKey, OS);
OS << ";\n";
}
for (const auto &Index : Table.Indices) {
emitLookupDeclaration(Table, *Index, OS);
OS << ";\n";
}
OS << "#endif\n\n";
emitIfdef((Twine("GET_") + Table.PreprocessorGuard + "_IMPL").str(), OS);
// The primary data table contains all the fields defined for this map.
OS << "constexpr " << Table.CppTypeName << " " << Table.Name << "[] = {\n";
for (unsigned i = 0; i < Table.Entries.size(); ++i) {
Record *Entry = Table.Entries[i];
OS << " { ";
bool NeedComma = false;
for (const auto &Field : Table.Fields) {
if (NeedComma)
OS << ", ";
NeedComma = true;
OS << primaryRepresentation(Table.Locs[0], Field,
Entry->getValueInit(Field.Name));
}
OS << " }, // " << i << "\n";
}
OS << " };\n";
// Indexes are sorted "{ Thing, PrimaryIdx }" arrays, so that a binary
// search can be performed by "Thing".
if (Table.PrimaryKey)
emitLookupFunction(Table, *Table.PrimaryKey, true, OS);
for (const auto &Index : Table.Indices)
emitLookupFunction(Table, *Index, false, OS);
OS << "#endif\n\n";
}
bool SearchableTableEmitter::parseFieldType(GenericField &Field, Init *TypeOf) {
if (auto Type = dyn_cast<StringInit>(TypeOf)) {
if (Type->getValue() == "code") {
Field.IsCode = true;
return true;
} else {
if (Record *TypeRec = Records.getDef(Type->getValue())) {
if (TypeRec->isSubClassOf("GenericEnum")) {
Field.Enum = EnumMap[TypeRec];
Field.RecType = RecordRecTy::get(Field.Enum->Class);
return true;
}
}
}
}
return false;
}
std::unique_ptr<SearchIndex> SearchableTableEmitter::parseSearchIndex(
GenericTable &Table, const RecordVal *KeyRecVal, StringRef Name,
const std::vector<StringRef> &Key, bool EarlyOut) {
auto Index = std::make_unique<SearchIndex>();
Index->Name = std::string(Name);
Index->Loc = KeyRecVal->getLoc();
Index->EarlyOut = EarlyOut;
for (const auto &FieldName : Key) {
const GenericField *Field = Table.getFieldByName(FieldName);
if (!Field)
PrintFatalError(
KeyRecVal,
Twine("In table '") + Table.Name +
"', 'PrimaryKey' or 'Key' refers to nonexistent field '" +
FieldName + "'");
Index->Fields.push_back(*Field);
}
if (EarlyOut && isa<StringRecTy>(Index->Fields[0].RecType)) {
PrintFatalError(
KeyRecVal, Twine("In lookup method '") + Name + "', early-out is not " +
"supported for a first key field of type string");
}
return Index;
}
void SearchableTableEmitter::collectEnumEntries(
GenericEnum &Enum, StringRef NameField, StringRef ValueField,
const std::vector<Record *> &Items) {
for (auto EntryRec : Items) {
StringRef Name;
if (NameField.empty())
Name = EntryRec->getName();
else
Name = EntryRec->getValueAsString(NameField);
int64_t Value = 0;
if (!ValueField.empty())
Value = getInt(EntryRec, ValueField);
Enum.Entries.push_back(std::make_unique<GenericEnum::Entry>(Name, Value));
Enum.EntryMap.insert(std::make_pair(EntryRec, Enum.Entries.back().get()));
}
if (ValueField.empty()) {
llvm::stable_sort(Enum.Entries,
[](const std::unique_ptr<GenericEnum::Entry> &LHS,
const std::unique_ptr<GenericEnum::Entry> &RHS) {
return LHS->first < RHS->first;
});
for (size_t i = 0; i < Enum.Entries.size(); ++i)
Enum.Entries[i]->second = i;
}
}
void SearchableTableEmitter::collectTableEntries(
GenericTable &Table, const std::vector<Record *> &Items) {
if (Items.empty())
PrintFatalError(Table.Locs,
Twine("Table '") + Table.Name + "' has no entries");
for (auto EntryRec : Items) {
for (auto &Field : Table.Fields) {
auto TI = dyn_cast<TypedInit>(EntryRec->getValueInit(Field.Name));
if (!TI || !TI->isComplete()) {
PrintFatalError(EntryRec, Twine("Record '") + EntryRec->getName() +
"' for table '" + Table.Name +
"' is missing field '" + Field.Name +
"'");
}
if (!Field.RecType) {
Field.RecType = TI->getType();
} else {
RecTy *Ty = resolveTypes(Field.RecType, TI->getType());
if (!Ty)
PrintFatalError(EntryRec->getValue(Field.Name),
Twine("Field '") + Field.Name + "' of table '" +
Table.Name + "' entry has incompatible type: " +
TI->getType()->getAsString() + " vs. " +
Field.RecType->getAsString());
Field.RecType = Ty;
}
}
Table.Entries.push_back(EntryRec); // Add record to table's record list.
}
Record *IntrinsicClass = Records.getClass("Intrinsic");
Record *InstructionClass = Records.getClass("Instruction");
for (auto &Field : Table.Fields) {
if (!Field.RecType)
PrintFatalError(Twine("Cannot determine type of field '") + Field.Name +
"' in table '" + Table.Name + "'. Maybe it is not used?");
if (auto RecordTy = dyn_cast<RecordRecTy>(Field.RecType)) {
if (IntrinsicClass && RecordTy->isSubClassOf(IntrinsicClass))
Field.IsIntrinsic = true;
else if (InstructionClass && RecordTy->isSubClassOf(InstructionClass))
Field.IsInstruction = true;
}
}
}
void SearchableTableEmitter::run(raw_ostream &OS) {
// Emit tables in a deterministic order to avoid needless rebuilds.
SmallVector<std::unique_ptr<GenericTable>, 4> Tables;
DenseMap<Record *, GenericTable *> TableMap;
// Collect all definitions first.
for (auto EnumRec : Records.getAllDerivedDefinitions("GenericEnum")) {
StringRef NameField;
if (!EnumRec->isValueUnset("NameField"))
NameField = EnumRec->getValueAsString("NameField");
StringRef ValueField;
if (!EnumRec->isValueUnset("ValueField"))
ValueField = EnumRec->getValueAsString("ValueField");
auto Enum = std::make_unique<GenericEnum>();
Enum->Name = std::string(EnumRec->getName());
Enum->PreprocessorGuard = std::string(EnumRec->getName());
StringRef FilterClass = EnumRec->getValueAsString("FilterClass");
Enum->Class = Records.getClass(FilterClass);
if (!Enum->Class)
PrintFatalError(EnumRec->getValue("FilterClass"),
Twine("Enum FilterClass '") + FilterClass +
"' does not exist");
collectEnumEntries(*Enum, NameField, ValueField,
Records.getAllDerivedDefinitions(FilterClass));
EnumMap.insert(std::make_pair(EnumRec, Enum.get()));
Enums.emplace_back(std::move(Enum));
}
for (auto TableRec : Records.getAllDerivedDefinitions("GenericTable")) {
auto Table = std::make_unique<GenericTable>();
Table->Name = std::string(TableRec->getName());
Table->Locs = TableRec->getLoc();
Table->PreprocessorGuard = std::string(TableRec->getName());
Table->CppTypeName = std::string(TableRec->getValueAsString("CppTypeName"));
std::vector<StringRef> Fields = TableRec->getValueAsListOfStrings("Fields");
for (const auto &FieldName : Fields) {
Table->Fields.emplace_back(FieldName); // Construct a GenericField.
if (auto TypeOfRecordVal = TableRec->getValue(("TypeOf_" + FieldName).str())) {
if (!parseFieldType(Table->Fields.back(), TypeOfRecordVal->getValue())) {
PrintError(TypeOfRecordVal,
Twine("Table '") + Table->Name +
"' has invalid 'TypeOf_" + FieldName +
"': " + TypeOfRecordVal->getValue()->getAsString());
PrintFatalNote("The 'TypeOf_xxx' field must be a string naming a "
"GenericEnum record, or \"code\"");
}
}
}
StringRef FilterClass = TableRec->getValueAsString("FilterClass");
if (!Records.getClass(FilterClass))
PrintFatalError(TableRec->getValue("FilterClass"),
Twine("Table FilterClass '") +
FilterClass + "' does not exist");
collectTableEntries(*Table, Records.getAllDerivedDefinitions(FilterClass));
if (!TableRec->isValueUnset("PrimaryKey")) {
Table->PrimaryKey =
parseSearchIndex(*Table, TableRec->getValue("PrimaryKey"),
TableRec->getValueAsString("PrimaryKeyName"),
TableRec->getValueAsListOfStrings("PrimaryKey"),
TableRec->getValueAsBit("PrimaryKeyEarlyOut"));
llvm::stable_sort(Table->Entries, [&](Record *LHS, Record *RHS) {
return compareBy(LHS, RHS, *Table->PrimaryKey);
});
}
TableMap.insert(std::make_pair(TableRec, Table.get()));
Tables.emplace_back(std::move(Table));
}
for (Record *IndexRec : Records.getAllDerivedDefinitions("SearchIndex")) {
Record *TableRec = IndexRec->getValueAsDef("Table");
auto It = TableMap.find(TableRec);
if (It == TableMap.end())
PrintFatalError(IndexRec->getValue("Table"),
Twine("SearchIndex '") + IndexRec->getName() +
"' refers to nonexistent table '" +
TableRec->getName());
GenericTable &Table = *It->second;
Table.Indices.push_back(
parseSearchIndex(Table, IndexRec->getValue("Key"), IndexRec->getName(),
IndexRec->getValueAsListOfStrings("Key"),
IndexRec->getValueAsBit("EarlyOut")));
}
// Translate legacy tables.
Record *SearchableTable = Records.getClass("SearchableTable");
for (auto &NameRec : Records.getClasses()) {
Record *Class = NameRec.second.get();
if (Class->getSuperClasses().size() != 1 ||
!Class->isSubClassOf(SearchableTable))
continue;
StringRef TableName = Class->getName();
std::vector<Record *> Items = Records.getAllDerivedDefinitions(TableName);
if (!Class->isValueUnset("EnumNameField")) {
StringRef NameField = Class->getValueAsString("EnumNameField");
StringRef ValueField;
if (!Class->isValueUnset("EnumValueField"))
ValueField = Class->getValueAsString("EnumValueField");
auto Enum = std::make_unique<GenericEnum>();
Enum->Name = (Twine(Class->getName()) + "Values").str();
Enum->PreprocessorGuard = Class->getName().upper();
Enum->Class = Class;
collectEnumEntries(*Enum, NameField, ValueField, Items);
Enums.emplace_back(std::move(Enum));
}
auto Table = std::make_unique<GenericTable>();
Table->Name = (Twine(Class->getName()) + "sList").str();
Table->Locs = Class->getLoc();
Table->PreprocessorGuard = Class->getName().upper();
Table->CppTypeName = std::string(Class->getName());
for (const RecordVal &Field : Class->getValues()) {
std::string FieldName = std::string(Field.getName());
// Skip uninteresting fields: either special to us, or injected
// template parameters (if they contain a ':').
if (FieldName.find(':') != std::string::npos ||
FieldName == "SearchableFields" || FieldName == "EnumNameField" ||
FieldName == "EnumValueField")
continue;
Table->Fields.emplace_back(FieldName);
}
collectTableEntries(*Table, Items);
for (const auto &Field :
Class->getValueAsListOfStrings("SearchableFields")) {
std::string Name =
(Twine("lookup") + Table->CppTypeName + "By" + Field).str();
Table->Indices.push_back(parseSearchIndex(*Table, Class->getValue(Field),
Name, {Field}, false));
}
Tables.emplace_back(std::move(Table));
}
// Emit everything.
for (const auto &Enum : Enums)
emitGenericEnum(*Enum, OS);
for (const auto &Table : Tables)
emitGenericTable(*Table, OS);
// Put all #undefs last, to allow multiple sections guarded by the same
// define.
for (const auto &Guard : PreprocessorGuards)
OS << "#undef " << Guard << "\n";
}
namespace llvm {
void EmitSearchableTables(RecordKeeper &RK, raw_ostream &OS) {
SearchableTableEmitter(RK).run(OS);
}
} // End llvm namespace.
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