ARCAsmPrinter.cpp revision 360784 
1//===- ARCAsmPrinter.cpp - ARC LLVM assembly writer -------------*- C++ -*-===//
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 a printer that converts from our internal representation
10// of machine-dependent LLVM code to GNU format ARC assembly language.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ARC.h"
15#include "ARCMCInstLower.h"
16#include "ARCSubtarget.h"
17#include "ARCTargetMachine.h"
18#include "MCTargetDesc/ARCInstPrinter.h"
19#include "TargetInfo/ARCTargetInfo.h"
20#include "llvm/CodeGen/AsmPrinter.h"
21#include "llvm/CodeGen/MachineInstr.h"
22#include "llvm/MC/MCAsmInfo.h"
23#include "llvm/MC/MCInst.h"
24#include "llvm/MC/MCStreamer.h"
25#include "llvm/Support/TargetRegistry.h"
26#include "llvm/Support/raw_ostream.h"
27
28using namespace llvm;
29
30#define DEBUG_TYPE "asm-printer"
31
32namespace {
33
34class ARCAsmPrinter : public AsmPrinter {
35  ARCMCInstLower MCInstLowering;
36
37public:
38  explicit ARCAsmPrinter(TargetMachine &TM,
39                         std::unique_ptr<MCStreamer> Streamer)
40      : AsmPrinter(TM, std::move(Streamer)),
41        MCInstLowering(&OutContext, *this) {}
42
43  StringRef getPassName() const override { return "ARC Assembly Printer"; }
44  void EmitInstruction(const MachineInstr *MI) override;
45};
46
47} // end anonymous namespace
48
49void ARCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
50  SmallString<128> Str;
51  raw_svector_ostream O(Str);
52
53  switch (MI->getOpcode()) {
54  case ARC::DBG_VALUE:
55    llvm_unreachable("Should be handled target independently");
56    break;
57  }
58
59  MCInst TmpInst;
60  MCInstLowering.Lower(MI, TmpInst);
61  EmitToStreamer(*OutStreamer, TmpInst);
62}
63
64// Force static initialization.
65extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCAsmPrinter() {
66  RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());
67}
68