================ @@ -0,0 +1,191 @@ +//===- EmitTargetFeature.cpp - Generate CPU Targer feature ----===// +// +// 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 exports cpu target features +// and cpu sub-type for all platform. +// +//===----------------------------------------------------------------------===// + +#include "llvm/ADT/DenseMap.h" +#include "llvm/TableGen/Error.h" +#include "llvm/TableGen/Record.h" +#include "llvm/TableGen/TableGenBackend.h" +#include "llvm/TargetParser/SubtargetFeature.h" + +using namespace llvm; + +using FeatureMapTy = DenseMap<const Record *, unsigned>; +using ConstRecVec = std::vector<const Record *>; + +struct LessRecordFieldNameAndID { + bool operator()(const Record *Rec1, const Record *Rec2) const { + return std::tuple(Rec1->getValueAsString("Name"), Rec1->getID()) < + std::tuple(Rec2->getValueAsString("Name"), Rec2->getID()); + } +}; + +static StringRef getTargetName(const RecordKeeper &Records) { + ArrayRef<const Record *> Targets = Records.getAllDerivedDefinitions("Target"); + if (Targets.size() == 0) + PrintFatalError("No 'Target' subclasses defined!"); + if (Targets.size() != 1) + PrintFatalError("Multiple subclasses of Target defined!"); + return Targets[0]->getName(); +} + +static FeatureMapTy enumeration(const RecordKeeper &Records, raw_ostream &OS) { + ArrayRef<const Record *> DefList = + Records.getAllDerivedDefinitions("SubtargetFeature"); + + unsigned N = DefList.size(); + if (N == 0) + return FeatureMapTy(); + + if (N + 1 > MAX_SUBTARGET_FEATURES) + PrintFatalError( + "Too many subtarget features! Bump MAX_SUBTARGET_FEATURES."); + + StringRef Target = getTargetName(Records); + + OS << "namespace " << Target << " {\n"; + + OS << "enum {\n"; + + FeatureMapTy FeatureMap; + for (unsigned I = 0; I < N; ++I) { + const Record *Def = DefList[I]; + // Print the Feature Name. + OS << " " << Def->getName() << " = " << I << ",\n"; + + FeatureMap[Def] = I; + } + + OS << " " << "NumSubtargetFeatures = " << N << "\n"; + + // Close enumeration and namespace + OS << "};\n"; + OS << "} // end namespace " << Target << "\n"; + return FeatureMap; +} + +static void printFeatureMask(raw_ostream &OS, ---------------- rnk wrote:
This tablegen code is duplicated from the subtarget feature emitter. Please factor things so that the code is shared, like the subtarget emitter code could call this code through a header. https://github.com/llvm/llvm-project/pull/144594 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
