LLVM  14.0.0git
MSP430MCInstLower.cpp
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1 //===-- MSP430MCInstLower.cpp - Convert MSP430 MachineInstr to an MCInst --===//
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 // This file contains code to lower MSP430 MachineInstrs to their corresponding
10 // MCInst records.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "MSP430MCInstLower.h"
15 #include "llvm/ADT/SmallString.h"
19 #include "llvm/IR/DataLayout.h"
20 #include "llvm/IR/Mangler.h"
21 #include "llvm/MC/MCAsmInfo.h"
22 #include "llvm/MC/MCContext.h"
23 #include "llvm/MC/MCExpr.h"
24 #include "llvm/MC/MCInst.h"
28 using namespace llvm;
29 
32  switch (MO.getTargetFlags()) {
33  default: llvm_unreachable("Unknown target flag on GV operand");
34  case 0: break;
35  }
36 
37  return Printer.getSymbol(MO.getGlobal());
38 }
39 
42  switch (MO.getTargetFlags()) {
43  default: llvm_unreachable("Unknown target flag on GV operand");
44  case 0: break;
45  }
46 
47  return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
48 }
49 
52  const DataLayout &DL = Printer.getDataLayout();
54  raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "JTI"
55  << Printer.getFunctionNumber() << '_'
56  << MO.getIndex();
57 
58  switch (MO.getTargetFlags()) {
59  default: llvm_unreachable("Unknown target flag on GV operand");
60  case 0: break;
61  }
62 
63  // Create a symbol for the name.
64  return Ctx.getOrCreateSymbol(Name);
65 }
66 
69  const DataLayout &DL = Printer.getDataLayout();
71  raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "CPI"
72  << Printer.getFunctionNumber() << '_'
73  << MO.getIndex();
74 
75  switch (MO.getTargetFlags()) {
76  default: llvm_unreachable("Unknown target flag on GV operand");
77  case 0: break;
78  }
79 
80  // Create a symbol for the name.
81  return Ctx.getOrCreateSymbol(Name);
82 }
83 
86  switch (MO.getTargetFlags()) {
87  default: llvm_unreachable("Unknown target flag on GV operand");
88  case 0: break;
89  }
90 
91  return Printer.GetBlockAddressSymbol(MO.getBlockAddress());
92 }
93 
95 LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
96  // FIXME: We would like an efficient form for this, so we don't have to do a
97  // lot of extra uniquing.
98  const MCExpr *Expr = MCSymbolRefExpr::create(Sym, Ctx);
99 
100  switch (MO.getTargetFlags()) {
101  default: llvm_unreachable("Unknown target flag on GV operand");
102  case 0: break;
103  }
104 
105  if (!MO.isJTI() && MO.getOffset())
106  Expr = MCBinaryExpr::createAdd(Expr,
108  Ctx);
109  return MCOperand::createExpr(Expr);
110 }
111 
112 #define GET_REGINFO_ENUM
113 #include "MSP430GenRegisterInfo.inc"
114 
115 void MSP430MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
116  OutMI.setOpcode(MI->getOpcode());
117 
118  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
119  const MachineOperand &MO = MI->getOperand(i);
120 
121  MCOperand MCOp;
122  switch (MO.getType()) {
123  default:
124  MI->print(errs());
125  llvm_unreachable("unknown operand type");
127  // Ignore all implicit register operands.
128  if (MO.isImplicit()) continue;
129  MCOp = MCOperand::createReg(MO.getReg());
130  break;
132  MCOp = MCOperand::createImm(MO.getImm());
133  break;
136  MO.getMBB()->getSymbol(), Ctx));
137  break;
140  break;
143  break;
145  MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
146  break;
149  break;
152  break;
154  continue;
155  }
156 
157  OutMI.addOperand(MCOp);
158  }
159 }
i
i
Definition: README.txt:29
llvm::MSP430MCInstLower::Lower
void Lower(const MachineInstr *MI, MCInst &OutMI) const
Definition: MSP430MCInstLower.cpp:115
AsmPrinter.h
llvm::MachineOperand::MO_BlockAddress
@ MO_BlockAddress
Address of a basic block.
Definition: MachineOperand.h:63
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:103
MachineInstr.h
llvm::MachineOperand::MO_Immediate
@ MO_Immediate
Immediate operand.
Definition: MachineOperand.h:53
llvm
---------------------— PointerInfo ------------------------------------—
Definition: AllocatorList.h:23
llvm::MCSymbol
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
llvm::DataLayout
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:112
llvm::MCOperand::createExpr
static MCOperand createExpr(const MCExpr *Val)
Definition: MCInst.h:162
llvm::MachineOperand::getGlobal
const GlobalValue * getGlobal() const
Definition: MachineOperand.h:563
llvm::MCOperand::createImm
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:141
llvm::MCConstantExpr::create
static const MCConstantExpr * create(int64_t Value, MCContext &Ctx, bool PrintInHex=false, unsigned SizeInBytes=0)
Definition: MCExpr.cpp:194
llvm::MachineOperand::getBlockAddress
const BlockAddress * getBlockAddress() const
Definition: MachineOperand.h:568
ErrorHandling.h
MachineBasicBlock.h
llvm::MachineOperand::isJTI
bool isJTI() const
isJTI - Tests if this is a MO_JumpTableIndex operand.
Definition: MachineOperand.h:337
llvm::MSP430MCInstLower::GetConstantPoolIndexSymbol
MCSymbol * GetConstantPoolIndexSymbol(const MachineOperand &MO) const
Definition: MSP430MCInstLower.cpp:68
llvm::errs
raw_fd_ostream & errs()
This returns a reference to a raw_ostream for standard error.
Definition: raw_ostream.cpp:892
llvm::MCInst
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
llvm::MachineOperand::getOffset
int64_t getOffset() const
Return the offset from the symbol in this operand.
Definition: MachineOperand.h:600
llvm::MachineOperand::MO_Register
@ MO_Register
Register operand.
Definition: MachineOperand.h:52
llvm::MCInst::setOpcode
void setOpcode(unsigned Op)
Definition: MCInst.h:197
llvm::MachineBasicBlock::getSymbol
MCSymbol * getSymbol() const
Return the MCSymbol for this basic block.
Definition: MachineBasicBlock.cpp:60
llvm::MCContext::getOrCreateSymbol
MCSymbol * getOrCreateSymbol(const Twine &Name)
Lookup the symbol inside with the specified Name.
Definition: MCContext.cpp:191
llvm::MachineOperand::isImplicit
bool isImplicit() const
Definition: MachineOperand.h:380
llvm::MSP430MCInstLower::GetGlobalAddressSymbol
MCSymbol * GetGlobalAddressSymbol(const MachineOperand &MO) const
Definition: MSP430MCInstLower.cpp:31
TargetMachine.h
SmallString.h
llvm::MachineOperand::MO_GlobalAddress
@ MO_GlobalAddress
Address of a global value.
Definition: MachineOperand.h:62
llvm::MachineOperand::getImm
int64_t getImm() const
Definition: MachineOperand.h:537
MCContext.h
MCInst.h
llvm::MachineOperand
MachineOperand class - Representation of each machine instruction operand.
Definition: MachineOperand.h:49
llvm::MSP430MCInstLower::GetBlockAddressSymbol
MCSymbol * GetBlockAddressSymbol(const MachineOperand &MO) const
Definition: MSP430MCInstLower.cpp:85
llvm::MSP430MCInstLower::LowerSymbolOperand
MCOperand LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const
Definition: MSP430MCInstLower.cpp:95
llvm::MCInst::addOperand
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
llvm::SmallString< 256 >
llvm::Pass::print
virtual void print(raw_ostream &OS, const Module *M) const
print - Print out the internal state of the pass.
Definition: Pass.cpp:125
llvm::MachineOperand::getTargetFlags
unsigned getTargetFlags() const
Definition: MachineOperand.h:221
llvm::MachineInstr
Representation of each machine instruction.
Definition: MachineInstr.h:64
llvm::AsmPrinter::GetBlockAddressSymbol
MCSymbol * GetBlockAddressSymbol(const BlockAddress *BA) const
Return the MCSymbol used to satisfy BlockAddress uses of the specified basic block.
Definition: AsmPrinter.cpp:3116
llvm::numbers::e
constexpr double e
Definition: MathExtras.h:57
llvm::MachineOperand::getType
MachineOperandType getType() const
getType - Returns the MachineOperandType for this operand.
Definition: MachineOperand.h:219
llvm::AsmPrinter::getSymbol
MCSymbol * getSymbol(const GlobalValue *GV) const
Definition: AsmPrinter.cpp:486
llvm::MachineOperand::getReg
Register getReg() const
getReg - Returns the register number.
Definition: MachineOperand.h:360
Mangler.h
llvm::MachineOperand::MO_JumpTableIndex
@ MO_JumpTableIndex
Address of indexed Jump Table for switch.
Definition: MachineOperand.h:60
llvm::MCBinaryExpr::createAdd
static const MCBinaryExpr * createAdd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:524
llvm::AsmPrinter::GetExternalSymbolSymbol
MCSymbol * GetExternalSymbolSymbol(StringRef Sym) const
Return the MCSymbol for the specified ExternalSymbol.
Definition: AsmPrinter.cpp:3172
llvm::MachineOperand::getMBB
MachineBasicBlock * getMBB() const
Definition: MachineOperand.h:552
MCAsmInfo.h
DataLayout.h
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
llvm::MCOperand::createReg
static MCOperand createReg(unsigned Reg)
Definition: MCInst.h:134
llvm::MachineOperand::MO_MachineBasicBlock
@ MO_MachineBasicBlock
MachineBasicBlock reference.
Definition: MachineOperand.h:56
DL
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
Definition: AArch64SLSHardening.cpp:76
llvm::GraphProgram::Name
Name
Definition: GraphWriter.h:52
llvm::MachineOperand::MO_ExternalSymbol
@ MO_ExternalSymbol
Name of external global symbol.
Definition: MachineOperand.h:61
llvm::MachineOperand::getIndex
int getIndex() const
Definition: MachineOperand.h:557
MSP430MCInstLower.h
llvm::MCSymbolRefExpr::create
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:385
llvm::MachineOperand::getSymbolName
const char * getSymbolName() const
Definition: MachineOperand.h:608
llvm::raw_svector_ostream
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:658
llvm::AsmPrinter::getDataLayout
const DataLayout & getDataLayout() const
Return information about data layout.
Definition: AsmPrinter.cpp:228
llvm::MSP430MCInstLower::GetExternalSymbolSymbol
MCSymbol * GetExternalSymbolSymbol(const MachineOperand &MO) const
Definition: MSP430MCInstLower.cpp:41
llvm::MCOperand
Instances of this class represent operands of the MCInst class.
Definition: MCInst.h:36
llvm::MachineOperand::MO_RegisterMask
@ MO_RegisterMask
Mask of preserved registers.
Definition: MachineOperand.h:64
raw_ostream.h
MCExpr.h
llvm::AsmPrinter::getFunctionNumber
unsigned getFunctionNumber() const
Return a unique ID for the current function.
Definition: AsmPrinter.cpp:220
llvm::MCExpr
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
llvm::MSP430MCInstLower::GetJumpTableSymbol
MCSymbol * GetJumpTableSymbol(const MachineOperand &MO) const
Definition: MSP430MCInstLower.cpp:51
llvm::MachineOperand::MO_ConstantPoolIndex
@ MO_ConstantPoolIndex
Address of indexed Constant in Constant Pool.
Definition: MachineOperand.h:58