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88d2fa438a
Original commit message: Use uint16_t to store InstrNameIndices in MCInstrInfo. Add asserts to protect all 16-bit string table offsets. Also make sure the string to offset table string is not larger than 65536 characters since larger string literals aren't portable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152296 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
//===-- llvm/MC/MCInstrInfo.h - Target Instruction Info ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes the target machine instruction set.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCINSTRINFO_H
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#define LLVM_MC_MCINSTRINFO_H
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#include "llvm/MC/MCInstrDesc.h"
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#include <cassert>
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namespace llvm {
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//---------------------------------------------------------------------------
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///
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/// MCInstrInfo - Interface to description of machine instruction set
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///
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class MCInstrInfo {
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const MCInstrDesc *Desc; // Raw array to allow static init'n
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const uint16_t *InstrNameIndices; // Array for name indices in InstrNameData
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const char *InstrNameData; // Instruction name string pool
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unsigned NumOpcodes; // Number of entries in the desc array
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public:
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/// InitMCInstrInfo - Initialize MCInstrInfo, called by TableGen
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/// auto-generated routines. *DO NOT USE*.
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void InitMCInstrInfo(const MCInstrDesc *D, const uint16_t *NI, const char *ND,
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unsigned NO) {
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Desc = D;
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InstrNameIndices = NI;
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InstrNameData = ND;
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NumOpcodes = NO;
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}
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unsigned getNumOpcodes() const { return NumOpcodes; }
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/// get - Return the machine instruction descriptor that corresponds to the
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/// specified instruction opcode.
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///
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const MCInstrDesc &get(unsigned Opcode) const {
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assert(Opcode < NumOpcodes && "Invalid opcode!");
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return Desc[Opcode];
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}
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/// getName - Returns the name for the instructions with the given opcode.
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const char *getName(unsigned Opcode) const {
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assert(Opcode < NumOpcodes && "Invalid opcode!");
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return &InstrNameData[InstrNameIndices[Opcode]];
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}
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};
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} // End llvm namespace
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#endif
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