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annotate lib/Target/SystemZ/SystemZMCInstLower.cpp @ 137:dc788094b8e4

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force SROA and TailRecursionElimination on non optimize mode for code segment
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Tue, 06 Mar 2018 08:58:23 +0900
parents afa8332a0e37
children c2174574ed3a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===-- SystemZMCInstLower.cpp - Lower MachineInstr to MCInst -------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "SystemZMCInstLower.h"
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11 #include "SystemZAsmPrinter.h"
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12 #include "llvm/IR/Mangler.h"
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13 #include "llvm/MC/MCExpr.h"
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14 #include "llvm/MC/MCInst.h"
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15 #include "llvm/MC/MCStreamer.h"
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16
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17 using namespace llvm;
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18
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19 // Return the VK_* enumeration for MachineOperand target flags Flags.
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20 static MCSymbolRefExpr::VariantKind getVariantKind(unsigned Flags) {
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21 switch (Flags & SystemZII::MO_SYMBOL_MODIFIER) {
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22 case 0:
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23 return MCSymbolRefExpr::VK_None;
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24 case SystemZII::MO_GOT:
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25 return MCSymbolRefExpr::VK_GOT;
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26 case SystemZII::MO_INDNTPOFF:
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27 return MCSymbolRefExpr::VK_INDNTPOFF;
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28 }
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29 llvm_unreachable("Unrecognised MO_ACCESS_MODEL");
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30 }
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31
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32 SystemZMCInstLower::SystemZMCInstLower(MCContext &ctx,
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33 SystemZAsmPrinter &asmprinter)
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34 : Ctx(ctx), AsmPrinter(asmprinter) {}
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35
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36 const MCExpr *
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37 SystemZMCInstLower::getExpr(const MachineOperand &MO,
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38 MCSymbolRefExpr::VariantKind Kind) const {
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39 const MCSymbol *Symbol;
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40 bool HasOffset = true;
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41 switch (MO.getType()) {
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42 case MachineOperand::MO_MachineBasicBlock:
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43 Symbol = MO.getMBB()->getSymbol();
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44 HasOffset = false;
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45 break;
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46
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47 case MachineOperand::MO_GlobalAddress:
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48 Symbol = AsmPrinter.getSymbol(MO.getGlobal());
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49 break;
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50
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51 case MachineOperand::MO_ExternalSymbol:
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52 Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
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53 break;
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54
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55 case MachineOperand::MO_JumpTableIndex:
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56 Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
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57 HasOffset = false;
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58 break;
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59
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60 case MachineOperand::MO_ConstantPoolIndex:
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61 Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
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62 break;
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63
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64 case MachineOperand::MO_BlockAddress:
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65 Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
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66 break;
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67
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68 default:
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69 llvm_unreachable("unknown operand type");
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70 }
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71 const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, Kind, Ctx);
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72 if (HasOffset)
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73 if (int64_t Offset = MO.getOffset()) {
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74 const MCExpr *OffsetExpr = MCConstantExpr::create(Offset, Ctx);
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75 Expr = MCBinaryExpr::createAdd(Expr, OffsetExpr, Ctx);
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76 }
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77 return Expr;
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78 }
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79
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80 MCOperand SystemZMCInstLower::lowerOperand(const MachineOperand &MO) const {
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81 switch (MO.getType()) {
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82 case MachineOperand::MO_Register:
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83 return MCOperand::createReg(MO.getReg());
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84
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85 case MachineOperand::MO_Immediate:
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86 return MCOperand::createImm(MO.getImm());
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87
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88 default: {
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89 MCSymbolRefExpr::VariantKind Kind = getVariantKind(MO.getTargetFlags());
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90 return MCOperand::createExpr(getExpr(MO, Kind));
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91 }
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92 }
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93 }
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94
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95 void SystemZMCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {
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96 OutMI.setOpcode(MI->getOpcode());
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97 for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I) {
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98 const MachineOperand &MO = MI->getOperand(I);
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99 // Ignore all implicit register operands.
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100 if (!MO.isReg() || !MO.isImplicit())
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101 OutMI.addOperand(lowerOperand(MO));
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102 }
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103 }