1 //===- MCInstrAnalysis.cpp - InstrDesc target hooks -----------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/MC/MCInstrAnalysis.h"
11 
12 #include "llvm/ADT/APInt.h"
13 #include "llvm/MC/MCInst.h"
14 #include "llvm/MC/MCInstrDesc.h"
15 #include "llvm/MC/MCInstrInfo.h"
16 #include <cstdint>
17 
18 using namespace llvm;
19 
20 bool MCInstrAnalysis::clearsSuperRegisters(const MCRegisterInfo &MRI,
21                                            const MCInst &Inst,
22                                            APInt &Writes) const {
23   Writes.clearAllBits();
24   return false;
25 }
26 
27 bool MCInstrAnalysis::isDependencyBreaking(const MCSubtargetInfo &STI,
28                                            const MCInst &Inst) const {
29   return false;
30 }
31 
32 bool MCInstrAnalysis::evaluateBranch(const MCInst &Inst, uint64_t Addr,
33                                      uint64_t Size, uint64_t &Target) const {
34   if (Inst.getNumOperands() == 0 ||
35       Info->get(Inst.getOpcode()).OpInfo[0].OperandType != MCOI::OPERAND_PCREL)
36     return false;
37 
38   int64_t Imm = Inst.getOperand(0).getImm();
39   Target = Addr+Size+Imm;
40   return true;
41 }
42