LLVM 20.0.0git
LoongArchInstPrinter.cpp
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1//===- LoongArchInstPrinter.cpp - Convert LoongArch MCInst to asm syntax --===//
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 class prints an LoongArch MCInst to a .s file.
10//
11//===----------------------------------------------------------------------===//
12
14#include "LoongArchBaseInfo.h"
16#include "llvm/MC/MCAsmInfo.h"
17#include "llvm/MC/MCInst.h"
20#include "llvm/MC/MCSymbol.h"
22using namespace llvm;
23
24#define DEBUG_TYPE "loongarch-asm-printer"
25
26// Include the auto-generated portion of the assembly writer.
27#define PRINT_ALIAS_INSTR
28#include "LoongArchGenAsmWriter.inc"
29
30static cl::opt<bool>
31 NumericReg("loongarch-numeric-reg",
32 cl::desc("Print numeric register names rather than the ABI "
33 "names (such as $r0 instead of $zero)"),
34 cl::init(false), cl::Hidden);
35
36// The command-line flag above is used by llvm-mc and llc. It can be used by
37// `llvm-objdump`, but we override the value here to handle options passed to
38// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to
39// be an easier way to allow these options in all these tools, without doing it
40// this way.
42 if (Opt == "numeric") {
43 NumericReg = true;
44 return true;
45 }
46
47 return false;
48}
49
51 StringRef Annot,
52 const MCSubtargetInfo &STI,
53 raw_ostream &O) {
54 if (!printAliasInstr(MI, Address, STI, O))
55 printInstruction(MI, Address, STI, O);
56 printAnnotation(O, Annot);
57}
58
60 O << '$' << getRegisterName(Reg);
61}
62
63void LoongArchInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
64 const MCSubtargetInfo &STI,
65 raw_ostream &O) {
66 const MCOperand &MO = MI->getOperand(OpNo);
67
68 if (MO.isReg()) {
69 printRegName(O, MO.getReg());
70 return;
71 }
72
73 if (MO.isImm()) {
74 O << MO.getImm();
75 return;
76 }
77
78 assert(MO.isExpr() && "Unknown operand kind in printOperand");
79 MO.getExpr()->print(O, &MAI);
80}
81
83 const MCSubtargetInfo &STI,
84 raw_ostream &O) {
85 const MCOperand &MO = MI->getOperand(OpNo);
86 assert(MO.isReg() && "printAtomicMemOp can only print register operands");
87 printRegName(O, MO.getReg());
88}
89
91 // Default print reg alias name
92 return getRegisterName(Reg, NumericReg ? LoongArch::NoRegAltName
93 : LoongArch::RegAliasName);
94}
IRTranslator LLVM IR MI
static cl::opt< bool > NumericReg("loongarch-numeric-reg", cl::desc("Print numeric register names rather than the ABI " "names (such as $r0 instead of $zero)"), cl::init(false), cl::Hidden)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
void printInstruction(const MCInst *MI, uint64_t Address, const MCSubtargetInfo &STI, raw_ostream &O)
void printInst(const MCInst *MI, uint64_t Address, StringRef Annot, const MCSubtargetInfo &STI, raw_ostream &O) override
Print the specified MCInst to the specified raw_ostream.
bool applyTargetSpecificCLOption(StringRef Opt) override
Customize the printer according to a command line option.
bool printAliasInstr(const MCInst *MI, uint64_t Address, const MCSubtargetInfo &STI, raw_ostream &O)
static const char * getRegisterName(MCRegister Reg)
void printRegName(raw_ostream &O, MCRegister Reg) const override
Print the assembler register name.
void printAtomicMemOp(const MCInst *MI, unsigned OpNo, const MCSubtargetInfo &STI, raw_ostream &O)
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:40
void printAnnotation(raw_ostream &OS, StringRef Annot)
Utility function for printing annotations.
const MCAsmInfo & MAI
Definition: MCInstPrinter.h:51
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
Instances of this class represent operands of the MCInst class.
Definition: MCInst.h:36
int64_t getImm() const
Definition: MCInst.h:80
bool isImm() const
Definition: MCInst.h:62
unsigned getReg() const
Returns the register number.
Definition: MCInst.h:69
bool isReg() const
Definition: MCInst.h:61
const MCExpr * getExpr() const
Definition: MCInst.h:114
bool isExpr() const
Definition: MCInst.h:65
Wrapper class representing physical registers. Should be passed by value.
Definition: MCRegister.h:33
Generic base class for all target subtargets.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:443
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18