90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
//===- MatchDataInfo.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 "match data" for GlobalISel
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/// Combiners. Match data allows for setting some arbitrary data in the "match"
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/// phase and pass it down to the "apply" phase.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_MIRPATTERNS_MATCHDATAINFO_H
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#define LLVM_UTILS_MIRPATTERNS_MATCHDATAINFO_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include <string>
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#include <vector>
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namespace llvm {
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class raw_ostream;
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namespace gi {
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/// Represents MatchData defined by the match stage and required by the apply
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/// stage.
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///
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/// This allows the plumbing of arbitrary data from C++ predicates between the
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/// stages.
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///
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/// When this class is initially created, it only has a pattern symbol and a
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/// type. When all of the MatchDatas declarations of a given pattern have been
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/// parsed, `AssignVariables` must be called to assign storage variable names to
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/// each MatchDataInfo.
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class MatchDataInfo {
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StringRef PatternSymbol;
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StringRef Type;
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std::string VarName;
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public:
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static constexpr StringLiteral StructTypeName = "MatchInfosTy";
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static constexpr StringLiteral StructName = "MatchInfos";
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MatchDataInfo(StringRef PatternSymbol, StringRef Type)
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: PatternSymbol(PatternSymbol), Type(Type.trim()) {}
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StringRef getPatternSymbol() const { return PatternSymbol; };
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StringRef getType() const { return Type; };
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bool hasVariableName() const { return !VarName.empty(); }
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void setVariableName(StringRef Name) { VarName = Name; }
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StringRef getVariableName() const;
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std::string getQualifiedVariableName() const {
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return StructName.str() + "." + getVariableName().str();
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}
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void print(raw_ostream &OS) const;
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void dump() const;
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};
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/// Pool of type -> variables used to emit MatchData variables declarations.
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///
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/// e.g. if the map contains "int64_t" -> ["MD0", "MD1"], then two variable
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/// declarations must be emitted: `int64_t MD0` and `int64_t MD1`.
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///
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/// This has a static lifetime and will outlive all the `MatchDataInfo` objects
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/// by design. It needs a static lifetime so the backends can emit variable
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/// declarations after processing all the inputs.
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extern StringMap<std::vector<std::string>> AllMatchDataVars;
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/// Assign variable names to all MatchDatas used by a pattern. This must be
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/// called after all MatchData decls have been parsed for a given processing
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/// unit (e.g. a combine rule)
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///
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/// Requires an array of MatchDataInfo so we can handle cases where a pattern
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/// uses multiple instances of the same MatchData type.
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///
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/// Writes to \ref AllMatchDataVars.
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void AssignMatchDataVariables(MutableArrayRef<MatchDataInfo> Infos);
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} // namespace gi
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} // end namespace llvm
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#endif // ifndef LLVM_UTILS_MIRPATTERNS_MATCHDATAINFO_H
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