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/MC/TargetRegistry.h"
26 #include "llvm/Support/raw_ostream.h"
27
28 using namespace llvm;
29
30 #define DEBUG_TYPE "asm-printer"
31
32 namespace {
33
34 class ARCAsmPrinter : public AsmPrinter {
35 ARCMCInstLower MCInstLowering;
36
37 public:
38 static char ID;
39
ARCAsmPrinter(TargetMachine & TM,std::unique_ptr<MCStreamer> Streamer)40 explicit ARCAsmPrinter(TargetMachine &TM,
41 std::unique_ptr<MCStreamer> Streamer)
42 : AsmPrinter(TM, std::move(Streamer), ID),
43 MCInstLowering(&OutContext, *this) {}
44
getPassName() const45 StringRef getPassName() const override { return "ARC Assembly Printer"; }
46 void emitInstruction(const MachineInstr *MI) override;
47
48 bool runOnMachineFunction(MachineFunction &MF) override;
49 };
50
51 } // end anonymous namespace
52
emitInstruction(const MachineInstr * MI)53 void ARCAsmPrinter::emitInstruction(const MachineInstr *MI) {
54 ARC_MC::verifyInstructionPredicates(MI->getOpcode(),
55 getSubtargetInfo().getFeatureBits());
56
57 SmallString<128> Str;
58 raw_svector_ostream O(Str);
59
60 switch (MI->getOpcode()) {
61 case ARC::DBG_VALUE:
62 llvm_unreachable("Should be handled target independently");
63 break;
64 }
65
66 MCInst TmpInst;
67 MCInstLowering.Lower(MI, TmpInst);
68 EmitToStreamer(*OutStreamer, TmpInst);
69 }
70
runOnMachineFunction(MachineFunction & MF)71 bool ARCAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
72 // Functions are 4-byte aligned.
73 MF.ensureAlignment(Align(4));
74 return AsmPrinter::runOnMachineFunction(MF);
75 }
76
77 char ARCAsmPrinter::ID = 0;
78
79 INITIALIZE_PASS(ARCAsmPrinter, "arc-asm-printer", "ARC Assmebly Printer", false,
80 false)
81
82 // Force static initialization.
LLVMInitializeARCAsmPrinter()83 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCAsmPrinter() {
84 RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());
85 }
86