1 //===-- XCoreTargetMachine.cpp - Define TargetMachine for XCore -----------===//
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 "XCoreTargetMachine.h"
14 #include "MCTargetDesc/XCoreMCTargetDesc.h"
15 #include "XCore.h"
16 #include "XCoreTargetObjectFile.h"
17 #include "XCoreTargetTransformInfo.h"
18 #include "llvm/ADT/Optional.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/Analysis/TargetTransformInfo.h"
21 #include "llvm/CodeGen/Passes.h"
22 #include "llvm/CodeGen/TargetPassConfig.h"
23 #include "llvm/Support/CodeGen.h"
24 #include "llvm/Support/TargetRegistry.h"
25 
26 using namespace llvm;
27 
28 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
29   if (!RM.hasValue())
30     return Reloc::Static;
31   return *RM;
32 }
33 
34 static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
35   if (CM) {
36     if (*CM != CodeModel::Small && *CM != CodeModel::Large)
37       report_fatal_error("Target only supports CodeModel Small or Large");
38     return *CM;
39   }
40   return CodeModel::Small;
41 }
42 
43 /// Create an ILP32 architecture model
44 ///
45 XCoreTargetMachine::XCoreTargetMachine(const Target &T, const Triple &TT,
46                                        StringRef CPU, StringRef FS,
47                                        const TargetOptions &Options,
48                                        Optional<Reloc::Model> RM,
49                                        Optional<CodeModel::Model> CM,
50                                        CodeGenOpt::Level OL, bool JIT)
51     : LLVMTargetMachine(
52           T, "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:32-f64:32-a:0:32-n32",
53           TT, CPU, FS, Options, getEffectiveRelocModel(RM),
54           getEffectiveCodeModel(CM), OL),
55       TLOF(llvm::make_unique<XCoreTargetObjectFile>()),
56       Subtarget(TT, CPU, FS, *this) {
57   initAsmInfo();
58 }
59 
60 XCoreTargetMachine::~XCoreTargetMachine() = default;
61 
62 namespace {
63 
64 /// XCore Code Generator Pass Configuration Options.
65 class XCorePassConfig : public TargetPassConfig {
66 public:
67   XCorePassConfig(XCoreTargetMachine &TM, PassManagerBase &PM)
68     : TargetPassConfig(TM, PM) {}
69 
70   XCoreTargetMachine &getXCoreTargetMachine() const {
71     return getTM<XCoreTargetMachine>();
72   }
73 
74   void addIRPasses() override;
75   bool addPreISel() override;
76   bool addInstSelector() override;
77   void addPreEmitPass() override;
78 };
79 
80 } // end anonymous namespace
81 
82 TargetPassConfig *XCoreTargetMachine::createPassConfig(PassManagerBase &PM) {
83   return new XCorePassConfig(*this, PM);
84 }
85 
86 void XCorePassConfig::addIRPasses() {
87   addPass(createAtomicExpandPass());
88 
89   TargetPassConfig::addIRPasses();
90 }
91 
92 bool XCorePassConfig::addPreISel() {
93   addPass(createXCoreLowerThreadLocalPass());
94   return false;
95 }
96 
97 bool XCorePassConfig::addInstSelector() {
98   addPass(createXCoreISelDag(getXCoreTargetMachine(), getOptLevel()));
99   return false;
100 }
101 
102 void XCorePassConfig::addPreEmitPass() {
103   addPass(createXCoreFrameToArgsOffsetEliminationPass(), false);
104 }
105 
106 // Force static initialization.
107 extern "C" void LLVMInitializeXCoreTarget() {
108   RegisterTargetMachine<XCoreTargetMachine> X(getTheXCoreTarget());
109 }
110 
111 TargetTransformInfo
112 XCoreTargetMachine::getTargetTransformInfo(const Function &F) {
113   return TargetTransformInfo(XCoreTTIImpl(this, F));
114 }
115