lib/MC/MCInstrAnalysis.cpp

   1 //===- MCInstrAnalysis.cpp - InstrDesc target hooks -----------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/MC/MCInstrAnalysis.h"
  10
  11 #include "llvm/ADT/APInt.h"
  12 #include "llvm/MC/MCInst.h"
  13 #include "llvm/MC/MCInstrDesc.h"
  14 #include "llvm/MC/MCInstrInfo.h"
  15 #include <cstdint>
  16
  17 using namespace llvm;
  18
  19 bool MCInstrAnalysis::clearsSuperRegisters(const MCRegisterInfo &MRI,
  20                                            const MCInst &Inst,
  21                                            APInt &Writes) const {
  22   Writes.clearAllBits();
  23   return false;
  24 }
  25
  26 bool MCInstrAnalysis::evaluateBranch(const MCInst &Inst, uint64_t Addr,
  27                                      uint64_t Size, uint64_t &Target) const {
  28   if (Inst.getNumOperands() == 0 ||
  29       Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
  30     return false;
  31
  32   int64_t Imm = Inst.getOperand(0).getImm();
  33   Target = Addr+Size+Imm;
  34   return true;
  35 }
  36
  37 Optional<uint64_t>
  38 MCInstrAnalysis::evaluateMemoryOperandAddress(const MCInst &Inst, uint64_t Addr,
  39                                               uint64_t Size) const {
  40   return None;
  41 }