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
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
//===- CodeGenInstAlias.h - InstAlias Class Wrapper -------------*- 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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// This file defines a wrapper class for the 'InstAlias' TableGen class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_TABLEGEN_CODEGENINSTALIAS_H
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#define LLVM_UTILS_TABLEGEN_CODEGENINSTALIAS_H
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#include "llvm/ADT/StringRef.h"
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#include <cassert>
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#include <cstdint>
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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template <typename T> class ArrayRef;
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class CodeGenInstruction;
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class CodeGenTarget;
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class DagInit;
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class SMLoc;
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class Record;
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/// CodeGenInstAlias - This represents an InstAlias definition.
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class CodeGenInstAlias {
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public:
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Record *TheDef; // The actual record defining this InstAlias.
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/// AsmString - The format string used to emit a .s file for the
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/// instruction.
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std::string AsmString;
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/// Result - The result instruction.
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DagInit *Result;
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/// ResultInst - The instruction generated by the alias (decoded from
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/// Result).
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CodeGenInstruction *ResultInst;
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struct ResultOperand {
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private:
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std::string Name;
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Record *R = nullptr;
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int64_t Imm = 0;
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public:
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enum { K_Record, K_Imm, K_Reg } Kind;
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ResultOperand(std::string N, Record *r)
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: Name(std::move(N)), R(r), Kind(K_Record) {}
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ResultOperand(int64_t I) : Imm(I), Kind(K_Imm) {}
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ResultOperand(Record *r) : R(r), Kind(K_Reg) {}
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bool isRecord() const { return Kind == K_Record; }
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bool isImm() const { return Kind == K_Imm; }
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bool isReg() const { return Kind == K_Reg; }
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StringRef getName() const {
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assert(isRecord());
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return Name;
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}
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Record *getRecord() const {
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assert(isRecord());
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return R;
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}
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int64_t getImm() const {
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assert(isImm());
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return Imm;
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}
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Record *getRegister() const {
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assert(isReg());
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return R;
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}
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unsigned getMINumOperands() const;
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};
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/// ResultOperands - The decoded operands for the result instruction.
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std::vector<ResultOperand> ResultOperands;
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/// ResultInstOperandIndex - For each operand, this vector holds a pair of
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/// indices to identify the corresponding operand in the result
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/// instruction. The first index specifies the operand and the second
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/// index specifies the suboperand. If there are no suboperands or if all
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/// of them are matched by the operand, the second value should be -1.
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std::vector<std::pair<unsigned, int>> ResultInstOperandIndex;
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CodeGenInstAlias(Record *R, CodeGenTarget &T);
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bool tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, Record *InstOpRec,
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bool hasSubOps, ArrayRef<SMLoc> Loc, CodeGenTarget &T,
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ResultOperand &ResOp);
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};
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} // namespace llvm
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#endif // LLVM_UTILS_TABLEGEN_CODEGENINSTALIAS_H
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