fa3d789df1
Refactor of the llvm-tblgen source into: - a "Basic" library, which contains the bare minimum utilities to build `llvm-min-tablegen` - a "Common" library which contains all of the helpers for TableGen backends. Such helpers can be shared by more than one backend, and even unit tested (e.g. CodeExpander is, maybe we can add more over time) Fixes #80647
106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
//===- SubtargetFeatureInfo.h - Helpers for subtarget features --*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H
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#define LLVM_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/TableGen/Record.h"
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#include <map>
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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struct SubtargetFeatureInfo;
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using SubtargetFeatureInfoMap =
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std::map<Record *, SubtargetFeatureInfo, LessRecordByID>;
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/// Helper class for storing information on a subtarget feature which
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/// participates in instruction matching.
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struct SubtargetFeatureInfo {
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/// The predicate record for this feature.
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Record *TheDef;
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/// An unique index assigned to represent this feature.
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uint64_t Index;
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SubtargetFeatureInfo(Record *D, uint64_t Idx) : TheDef(D), Index(Idx) {}
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/// The name of the enumerated constant identifying this feature.
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std::string getEnumName() const {
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return "Feature_" + TheDef->getName().str();
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}
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/// The name of the enumerated constant identifying the bitnumber for
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/// this feature.
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std::string getEnumBitName() const {
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return "Feature_" + TheDef->getName().str() + "Bit";
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}
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bool mustRecomputePerFunction() const {
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return TheDef->getValueAsBit("RecomputePerFunction");
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}
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void dump() const;
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static std::vector<std::pair<Record *, SubtargetFeatureInfo>>
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getAll(const RecordKeeper &Records);
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/// Emit the subtarget feature flag definitions.
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///
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/// This version emits the bit index for the feature and can therefore support
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/// more than 64 feature bits.
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static void emitSubtargetFeatureBitEnumeration(
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const SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS,
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const std::map<std::string, unsigned> *HwModes = nullptr);
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static void emitNameTable(SubtargetFeatureInfoMap &SubtargetFeatures,
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raw_ostream &OS);
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/// Emit the function to compute the list of available features given a
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/// subtarget.
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///
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/// This version is used for subtarget features defined using Predicate<>
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/// and supports more than 64 feature bits.
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///
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/// \param TargetName The name of the target as used in class prefixes (e.g.
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/// <TargetName>Subtarget)
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/// \param ClassName The name of the class that will contain the generated
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/// functions (including the target prefix.)
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/// \param FuncName The name of the function to emit.
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/// \param SubtargetFeatures A map of TableGen records to the
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/// SubtargetFeatureInfo equivalent.
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/// \param ExtraParams Additional arguments to the generated function.
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/// \param HwModes Map of HwMode conditions to check.
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static void emitComputeAvailableFeatures(
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StringRef TargetName, StringRef ClassName, StringRef FuncName,
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const SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS,
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StringRef ExtraParams = "",
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const std::map<std::string, unsigned> *HwModes = nullptr);
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/// Emit the function to compute the list of available features given a
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/// subtarget.
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///
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/// This version is used for subtarget features defined using
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/// AssemblerPredicate<> and supports up to 64 feature bits.
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///
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/// \param TargetName The name of the target as used in class prefixes (e.g.
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/// <TargetName>Subtarget)
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/// \param ClassName The name of the class (without the <Target> prefix)
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/// that will contain the generated functions.
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/// \param FuncName The name of the function to emit.
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/// \param SubtargetFeatures A map of TableGen records to the
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/// SubtargetFeatureInfo equivalent.
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static void emitComputeAssemblerAvailableFeatures(
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StringRef TargetName, StringRef ClassName, StringRef FuncName,
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SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS);
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};
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} // end namespace llvm
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#endif // LLVM_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H
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