llvm/lib/MC/MCInstrAnalysis.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

//===- MCInstrAnalysis.cpp - InstrDesc target hooks -----------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "llvm/MC/MCInstrAnalysis.h"

#include "llvm/ADT/APInt.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/MC/MCInstrInfo.h"
#include <cstdint>

using namespace llvm;

bool MCInstrAnalysis::clearsSuperRegisters(const MCRegisterInfo &MRI,
                                           const MCInst &Inst,
                                           APInt &Writes) const {
  Writes.clearAllBits();
  return false;
}

bool MCInstrAnalysis::isDependencyBreaking(const MCSubtargetInfo &STI,
                                           const MCInst &Inst) const {
  return false;
}

bool MCInstrAnalysis::evaluateBranch(const MCInst &Inst, uint64_t Addr,
                                     uint64_t Size, uint64_t &Target) const {
  if (Inst.getNumOperands() == 0 ||
      Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
    return false;

  int64_t Imm = Inst.getOperand(0).getImm();
  Target = Addr+Size+Imm;
  return true;
}