bf79d4819e
1. The PR proceeds with a backend target hook to allow front-ends to determine what target features are available in a compilation based on the CPU name. 2. Fix a backend target feature bug that supports HTM for Power8/9/10/11. However, HTM is only supported on Power8/9 according to the ISA. 3. All target features that are hardcoded in PPC.cpp can be retrieved from the backend target feature. I have double-checked that the hardcoded logic for inferring target features from the CPU in the frontend(PPC.cpp) is the same as in PPC.td. The reland patch addressed the comment https://github.com/llvm/llvm-project/pull/137670#discussion_r2143541120
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//===- TargetFeaturesEmitter.h- Generate CPU Target features ----===//
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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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//
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// Defines the TargetFeaturesEmitter class, which is used to export
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// CPU target features and CPU subtypes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_TABLEGEN_BASIC_EMITTARGETFEATURE_H
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#define LLVM_UTILS_TABLEGEN_BASIC_EMITTARGETFEATURE_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/TableGen/Record.h"
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namespace llvm {
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/// Sorting predicate to sort record pointers by their
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/// FieldName field.
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struct LessRecordFieldFieldName {
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bool operator()(const Record *Rec1, const Record *Rec2) const {
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return Rec1->getValueAsString("FieldName") <
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Rec2->getValueAsString("FieldName");
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}
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};
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using FeatureMapTy = DenseMap<const Record *, unsigned>;
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class TargetFeaturesEmitter {
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protected:
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const RecordKeeper &Records;
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std::string Target;
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public:
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TargetFeaturesEmitter(const RecordKeeper &R);
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static void printFeatureMask(raw_ostream &OS,
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ArrayRef<const Record *> FeatureList,
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const FeatureMapTy &FeatureMap);
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FeatureMapTy enumeration(raw_ostream &OS);
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void printFeatureKeyValues(raw_ostream &OS, const FeatureMapTy &FeatureMap);
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void printCPUKeyValues(raw_ostream &OS, const FeatureMapTy &FeatureMap);
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virtual void run(raw_ostream &O);
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virtual ~TargetFeaturesEmitter() {};
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};
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} // namespace llvm
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#endif
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