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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
//===- AsmWriterInst.h - Classes encapsulating a printable inst -*- 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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// These classes implement a parser for assembly strings. The parser splits
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// the string into operands, which can be literal strings (the constant bits of
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// the string), actual operands (i.e., operands from the MachineInstr), and
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// dynamically-generated text, specified by raw C++ code.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_TABLEGEN_ASMWRITERINST_H
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#define LLVM_UTILS_TABLEGEN_ASMWRITERINST_H
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#include <string>
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#include <vector>
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namespace llvm {
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class CodeGenInstruction;
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class Record;
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struct AsmWriterOperand {
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enum OpType {
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// Output this text surrounded by quotes to the asm.
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isLiteralTextOperand,
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// This is the name of a routine to call to print the operand.
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isMachineInstrOperand,
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// Output this text verbatim to the asm writer. It is code that
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// will output some text to the asm.
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isLiteralStatementOperand
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} OperandType;
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/// MiOpNo - For isMachineInstrOperand, this is the operand number of the
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/// machine instruction.
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unsigned MIOpNo;
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/// Str - For isLiteralTextOperand, this IS the literal text. For
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/// isMachineInstrOperand, this is the PrinterMethodName for the operand..
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/// For isLiteralStatementOperand, this is the code to insert verbatim
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/// into the asm writer.
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std::string Str;
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/// MiModifier - For isMachineInstrOperand, this is the modifier string for
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/// an operand, specified with syntax like ${opname:modifier}.
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std::string MiModifier;
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// To make VS STL happy
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AsmWriterOperand(OpType op = isLiteralTextOperand):OperandType(op) {}
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AsmWriterOperand(const std::string &LitStr,
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OpType op = isLiteralTextOperand)
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: OperandType(op), Str(LitStr) {}
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AsmWriterOperand(const std::string &Printer,
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unsigned _MIOpNo,
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const std::string &Modifier,
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OpType op = isMachineInstrOperand)
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: OperandType(op), MIOpNo(_MIOpNo), Str(Printer), MiModifier(Modifier) {}
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bool operator!=(const AsmWriterOperand &Other) const {
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if (OperandType != Other.OperandType || Str != Other.Str) return true;
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if (OperandType == isMachineInstrOperand)
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return MIOpNo != Other.MIOpNo || MiModifier != Other.MiModifier;
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return false;
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}
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bool operator==(const AsmWriterOperand &Other) const {
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return !operator!=(Other);
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}
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/// getCode - Return the code that prints this operand.
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std::string getCode(bool PassSubtarget) const;
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};
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class AsmWriterInst {
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public:
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std::vector<AsmWriterOperand> Operands;
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const CodeGenInstruction *CGI;
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unsigned CGIIndex;
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AsmWriterInst(const CodeGenInstruction &CGI, unsigned CGIIndex,
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unsigned Variant);
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/// MatchesAllButOneOp - If this instruction is exactly identical to the
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/// specified instruction except for one differing operand, return the
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/// differing operand number. Otherwise return ~0.
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unsigned MatchesAllButOneOp(const AsmWriterInst &Other) const;
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private:
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void AddLiteralString(const std::string &Str) {
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// If the last operand was already a literal text string, append this to
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// it, otherwise add a new operand.
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if (!Operands.empty() &&
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Operands.back().OperandType == AsmWriterOperand::isLiteralTextOperand)
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Operands.back().Str.append(Str);
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else
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Operands.push_back(AsmWriterOperand(Str));
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}
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};
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}
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#endif
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