1 //===- ARCAsmPrinter.cpp - ARC LLVM assembly writer -------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to GNU format ARC assembly language.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "ARC.h"
16 #include "ARCInstrInfo.h"
17 #include "ARCMCInstLower.h"
18 #include "ARCSubtarget.h"
19 #include "ARCTargetMachine.h"
20 #include "ARCTargetStreamer.h"
21 #include "InstPrinter/ARCInstPrinter.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/StringExtras.h"
24 #include "llvm/CodeGen/AsmPrinter.h"
25 #include "llvm/CodeGen/MachineFunctionPass.h"
26 #include "llvm/CodeGen/MachineInstr.h"
27 #include "llvm/CodeGen/MachineModuleInfo.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/MC/MCExpr.h"
30 #include "llvm/MC/MCInst.h"
31 #include "llvm/MC/MCStreamer.h"
32 #include "llvm/MC/MCSymbolELF.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/TargetRegistry.h"
35 #include "llvm/Support/raw_ostream.h"
36 #include "llvm/Target/TargetLoweringObjectFile.h"
37 #include <algorithm>
38 
39 using namespace llvm;
40 
41 #define DEBUG_TYPE "asm-printer"
42 
43 namespace {
44 
45 class ARCAsmPrinter : public AsmPrinter {
46   ARCMCInstLower MCInstLowering;
47   ARCTargetStreamer &getTargetStreamer();
48 
49 public:
ARCAsmPrinter(TargetMachine & TM,std::unique_ptr<MCStreamer> Streamer)50   explicit ARCAsmPrinter(TargetMachine &TM,
51                          std::unique_ptr<MCStreamer> Streamer)
52       : AsmPrinter(TM, std::move(Streamer)),
53         MCInstLowering(&OutContext, *this) {}
54 
getPassName() const55   StringRef getPassName() const override { return "ARC Assembly Printer"; }
56   void EmitInstruction(const MachineInstr *MI) override;
57 };
58 
59 } // end anonymous namespace
60 
getTargetStreamer()61 ARCTargetStreamer &ARCAsmPrinter::getTargetStreamer() {
62   return static_cast<ARCTargetStreamer &>(*OutStreamer->getTargetStreamer());
63 }
64 
EmitInstruction(const MachineInstr * MI)65 void ARCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
66   SmallString<128> Str;
67   raw_svector_ostream O(Str);
68 
69   switch (MI->getOpcode()) {
70   case ARC::DBG_VALUE:
71     llvm_unreachable("Should be handled target independently");
72     break;
73   }
74 
75   MCInst TmpInst;
76   MCInstLowering.Lower(MI, TmpInst);
77   EmitToStreamer(*OutStreamer, TmpInst);
78 }
79 
80 // Force static initialization.
LLVMInitializeARCAsmPrinter()81 extern "C" void LLVMInitializeARCAsmPrinter() {
82   RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());
83 }
84