1 //===- ARCTargetMachine.cpp - Define TargetMachine for ARC ------*- 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 //
10 //===----------------------------------------------------------------------===//
11 
12 #include "ARCTargetMachine.h"
13 #include "ARC.h"
14 #include "ARCMachineFunctionInfo.h"
15 #include "ARCTargetTransformInfo.h"
16 #include "TargetInfo/ARCTargetInfo.h"
17 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
19 #include "llvm/CodeGen/TargetPassConfig.h"
20 #include "llvm/MC/TargetRegistry.h"
21 #include <optional>
22 
23 using namespace llvm;
24 
25 static Reloc::Model getRelocModel(std::optional<Reloc::Model> RM) {
26   return RM.value_or(Reloc::Static);
27 }
28 
29 /// ARCTargetMachine ctor - Create an ILP32 architecture model
30 ARCTargetMachine::ARCTargetMachine(const Target &T, const Triple &TT,
31                                    StringRef CPU, StringRef FS,
32                                    const TargetOptions &Options,
33                                    std::optional<Reloc::Model> RM,
34                                    std::optional<CodeModel::Model> CM,
35                                    CodeGenOptLevel OL, bool JIT)
36     : LLVMTargetMachine(T,
37                         "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-"
38                         "f32:32:32-i64:32-f64:32-a:0:32-n32",
39                         TT, CPU, FS, Options, getRelocModel(RM),
40                         getEffectiveCodeModel(CM, CodeModel::Small), OL),
41       TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
42       Subtarget(TT, std::string(CPU), std::string(FS), *this) {
43   initAsmInfo();
44 }
45 
46 ARCTargetMachine::~ARCTargetMachine() = default;
47 
48 namespace {
49 
50 /// ARC Code Generator Pass Configuration Options.
51 class ARCPassConfig : public TargetPassConfig {
52 public:
53   ARCPassConfig(ARCTargetMachine &TM, PassManagerBase &PM)
54       : TargetPassConfig(TM, PM) {}
55 
56   ARCTargetMachine &getARCTargetMachine() const {
57     return getTM<ARCTargetMachine>();
58   }
59 
60   void addIRPasses() override;
61   bool addInstSelector() override;
62   void addPreEmitPass() override;
63   void addPreRegAlloc() override;
64 };
65 
66 } // end anonymous namespace
67 
68 TargetPassConfig *ARCTargetMachine::createPassConfig(PassManagerBase &PM) {
69   return new ARCPassConfig(*this, PM);
70 }
71 
72 void ARCPassConfig::addIRPasses() {
73   addPass(createAtomicExpandPass());
74 
75   TargetPassConfig::addIRPasses();
76 }
77 
78 bool ARCPassConfig::addInstSelector() {
79   addPass(createARCISelDag(getARCTargetMachine(), getOptLevel()));
80   return false;
81 }
82 
83 void ARCPassConfig::addPreEmitPass() { addPass(createARCBranchFinalizePass()); }
84 
85 void ARCPassConfig::addPreRegAlloc() {
86     addPass(createARCExpandPseudosPass());
87     addPass(createARCOptAddrMode());
88 }
89 
90 MachineFunctionInfo *ARCTargetMachine::createMachineFunctionInfo(
91     BumpPtrAllocator &Allocator, const Function &F,
92     const TargetSubtargetInfo *STI) const {
93     return ARCFunctionInfo::create<ARCFunctionInfo>(Allocator, F, STI);
94 }
95 
96 // Force static initialization.
97 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCTarget() {
98   RegisterTargetMachine<ARCTargetMachine> X(getTheARCTarget());
99   PassRegistry &PR = *PassRegistry::getPassRegistry();
100   initializeARCDAGToDAGISelPass(PR);
101 }
102 
103 TargetTransformInfo
104 ARCTargetMachine::getTargetTransformInfo(const Function &F) const {
105   return TargetTransformInfo(ARCTTIImpl(this, F));
106 }
107