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
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
//===- CodeExpansions.h - Record expansions for CodeExpander --------------===//
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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 Record the expansions to use in a CodeExpander.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringMap.h"
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#ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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#define LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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namespace llvm {
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class CodeExpansions {
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public:
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using const_iterator = StringMap<std::string>::const_iterator;
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protected:
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StringMap<std::string> Expansions;
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public:
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void declare(StringRef Name, StringRef Expansion) {
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// Duplicates are not inserted. The expansion refers to different
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// MachineOperands using the same virtual register.
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Expansions.try_emplace(Name, Expansion);
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}
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void redeclare(StringRef Name, StringRef Expansion) {
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Expansions[Name] = Expansion;
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}
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std::string lookup(StringRef Variable) const {
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return Expansions.lookup(Variable);
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}
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const_iterator begin() const { return Expansions.begin(); }
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const_iterator end() const { return Expansions.end(); }
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const_iterator find(StringRef Variable) const {
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return Expansions.find(Variable);
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}
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};
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} // end namespace llvm
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#endif // ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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