87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
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//===- CXXPredicates.h ------------------------------------------*- 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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//
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/// \file Contains utilities related to handling C++ code in MIR patterns for
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/// GlobalISel. C++ predicates need to be expanded, and then stored in a
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/// static pool until they can be emitted.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_MIRPATTERNS_CXXPREDICATES_H
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#define LLVM_UTILS_MIRPATTERNS_CXXPREDICATES_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/Hashing.h"
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#include "llvm/ADT/StringRef.h"
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#include <memory>
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#include <string>
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#include <vector>
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namespace llvm {
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namespace gi {
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/// Entry into the static pool of all CXX Predicate code. This contains
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/// fully expanded C++ code.
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///
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/// The static pool is hidden inside the object and can be accessed through
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/// getAllMatchCode/getAllApplyCode
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///
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/// Note that CXXPattern trims C++ code, so the Code is already expected to be
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/// free of leading/trailing whitespace.
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class CXXPredicateCode {
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using CXXPredicateCodePool =
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DenseMap<hash_code, std::unique_ptr<CXXPredicateCode>>;
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static CXXPredicateCodePool AllCXXMatchCode;
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static CXXPredicateCodePool AllCXXApplyCode;
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/// Sorts a `CXXPredicateCodePool` by their IDs and returns it.
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static std::vector<const CXXPredicateCode *>
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getSorted(const CXXPredicateCodePool &Pool);
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/// Gets an instance of `CXXPredicateCode` for \p Code, or returns an already
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/// existing one.
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static const CXXPredicateCode &get(CXXPredicateCodePool &Pool,
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std::string Code);
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CXXPredicateCode(std::string Code, unsigned ID);
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public:
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static const CXXPredicateCode &getMatchCode(std::string Code) {
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return get(AllCXXMatchCode, std::move(Code));
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}
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static const CXXPredicateCode &getApplyCode(std::string Code) {
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return get(AllCXXApplyCode, std::move(Code));
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}
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static std::vector<const CXXPredicateCode *> getAllMatchCode() {
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return getSorted(AllCXXMatchCode);
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}
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static std::vector<const CXXPredicateCode *> getAllApplyCode() {
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return getSorted(AllCXXApplyCode);
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}
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const std::string Code;
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const unsigned ID;
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const std::string BaseEnumName;
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bool needsUnreachable() const {
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return !StringRef(Code).starts_with("return");
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}
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std::string getEnumNameWithPrefix(StringRef Prefix) const {
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return Prefix.str() + BaseEnumName;
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}
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};
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} // namespace gi
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} // end namespace llvm
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#endif // ifndef LLVM_UTILS_MIRPATTERNS_CXXPREDICATES_H
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