1 //===- ARCTargetMachine.cpp - Define TargetMachine for ARC ------*- 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 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ARCTargetMachine.h"
14 #include "ARC.h"
15 #include "ARCTargetTransformInfo.h"
16 #include "llvm/CodeGen/Passes.h"
17 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
18 #include "llvm/CodeGen/TargetPassConfig.h"
19 #include "llvm/Support/TargetRegistry.h"
20 
21 using namespace llvm;
22 
23 static Reloc::Model getRelocModel(Optional<Reloc::Model> RM) {
24   if (!RM.hasValue())
25     return Reloc::Static;
26   return *RM;
27 }
28 
29 static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
30   if (CM)
31     return *CM;
32   return CodeModel::Small;
33 }
34 
35 /// ARCTargetMachine ctor - Create an ILP32 architecture model
36 ARCTargetMachine::ARCTargetMachine(const Target &T, const Triple &TT,
37                                    StringRef CPU, StringRef FS,
38                                    const TargetOptions &Options,
39                                    Optional<Reloc::Model> RM,
40                                    Optional<CodeModel::Model> CM,
41                                    CodeGenOpt::Level OL, bool JIT)
42     : LLVMTargetMachine(T,
43                         "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-"
44                         "f32:32:32-i64:32-f64:32-a:0:32-n32",
45                         TT, CPU, FS, Options, getRelocModel(RM),
46                         getEffectiveCodeModel(CM), OL),
47       TLOF(make_unique<TargetLoweringObjectFileELF>()),
48       Subtarget(TT, CPU, FS, *this) {
49   initAsmInfo();
50 }
51 
52 ARCTargetMachine::~ARCTargetMachine() = default;
53 
54 namespace {
55 
56 /// ARC Code Generator Pass Configuration Options.
57 class ARCPassConfig : public TargetPassConfig {
58 public:
59   ARCPassConfig(ARCTargetMachine &TM, PassManagerBase &PM)
60       : TargetPassConfig(TM, PM) {}
61 
62   ARCTargetMachine &getARCTargetMachine() const {
63     return getTM<ARCTargetMachine>();
64   }
65 
66   bool addInstSelector() override;
67   void addPreEmitPass() override;
68   void addPreRegAlloc() override;
69 };
70 
71 } // end anonymous namespace
72 
73 TargetPassConfig *ARCTargetMachine::createPassConfig(PassManagerBase &PM) {
74   return new ARCPassConfig(*this, PM);
75 }
76 
77 bool ARCPassConfig::addInstSelector() {
78   addPass(createARCISelDag(getARCTargetMachine(), getOptLevel()));
79   return false;
80 }
81 
82 void ARCPassConfig::addPreEmitPass() { addPass(createARCBranchFinalizePass()); }
83 
84 void ARCPassConfig::addPreRegAlloc() { addPass(createARCExpandPseudosPass()); }
85 
86 // Force static initialization.
87 extern "C" void LLVMInitializeARCTarget() {
88   RegisterTargetMachine<ARCTargetMachine> X(getTheARCTarget());
89 }
90 
91 TargetIRAnalysis ARCTargetMachine::getTargetIRAnalysis() {
92   return TargetIRAnalysis([this](const Function &F) {
93     return TargetTransformInfo(ARCTTIImpl(this, F));
94   });
95 }
96