LLVM  4.0.0
AVRTargetMachine.cpp
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1 //===-- AVRTargetMachine.cpp - Define TargetMachine for AVR ---------------===//
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 defines the AVR specific subclass of TargetMachine.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "AVRTargetMachine.h"
15 
16 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/IR/Module.h"
21 
22 #include "AVRTargetObjectFile.h"
23 #include "AVR.h"
25 
26 namespace llvm {
27 
28 static const char *AVRDataLayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8";
29 
30 /// Processes a CPU name.
31 static StringRef getCPU(StringRef CPU) {
32  if (CPU.empty() || CPU == "generic") {
33  return "avr2";
34  }
35 
36  return CPU;
37 }
38 
40  return RM.hasValue() ? *RM : Reloc::Static;
41 }
42 
44  StringRef CPU, StringRef FS,
45  const TargetOptions &Options,
49  T, AVRDataLayout, TT,
50  getCPU(CPU), FS, Options, getEffectiveRelocModel(RM), CM, OL),
51  SubTarget(TT, getCPU(CPU), FS, *this) {
52  this->TLOF = make_unique<AVRTargetObjectFile>();
53  initAsmInfo();
54 }
55 
56 namespace {
57 /// AVR Code Generator Pass Configuration Options.
58 class AVRPassConfig : public TargetPassConfig {
59 public:
60  AVRPassConfig(AVRTargetMachine *TM, PassManagerBase &PM)
61  : TargetPassConfig(TM, PM) {}
62 
63  AVRTargetMachine &getAVRTargetMachine() const {
64  return getTM<AVRTargetMachine>();
65  }
66 
67  bool addInstSelector() override;
68  void addPreSched2() override;
69  void addPreRegAlloc() override;
70 };
71 } // namespace
72 
74  return new AVRPassConfig(this, PM);
75 }
76 
77 extern "C" void LLVMInitializeAVRTarget() {
78  // Register the target.
80 
81  auto &PR = *PassRegistry::getPassRegistry();
85 }
86 
88  return &SubTarget;
89 }
90 
92  return &SubTarget;
93 }
94 
95 //===----------------------------------------------------------------------===//
96 // Pass Pipeline Configuration
97 //===----------------------------------------------------------------------===//
98 
99 bool AVRPassConfig::addInstSelector() {
100  // Install an instruction selector.
101  addPass(createAVRISelDag(getAVRTargetMachine(), getOptLevel()));
102  // Create the frame analyzer pass used by the PEI pass.
103  addPass(createAVRFrameAnalyzerPass());
104 
105  return false;
106 }
107 
108 void AVRPassConfig::addPreRegAlloc() {
109  // Create the dynalloc SP save/restore pass to handle variable sized allocas.
110  addPass(createAVRDynAllocaSRPass());
111 }
112 
113 void AVRPassConfig::addPreSched2() {
114  addPass(createAVRRelaxMemPass());
115  addPass(createAVRExpandPseudoPass());
116 }
117 
118 } // end of namespace llvm
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
bool hasValue() const
Definition: Optional.h:125
const AVRSubtarget * getSubtargetImpl() const
Target & getTheAVRTarget()
FunctionPass * createAVRRelaxMemPass()
Target-Independent Code Generator Pass Configuration Options.
A generic AVR implementation.
void LLVMInitializeAVRTarget()
void initializeAVRRelaxMemPass(PassRegistry &)
void initializeAVRInstrumentFunctionsPass(PassRegistry &)
static Reloc::Model getEffectiveRelocModel(Optional< Reloc::Model > RM)
TargetPassConfig * createPassConfig(PassManagerBase &PM) override
Create a pass configuration object to be used by addPassToEmitX methods for generating a pipeline of ...
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang","erlang-compatible garbage collector")
This class describes a target machine that is implemented with the LLVM target-independent code gener...
FunctionPass * createAVRISelDag(AVRTargetMachine &TM, CodeGenOpt::Level OptLevel)
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
Module.h This file contains the declarations for the Module class.
Target - Wrapper for Target specific information.
A specific AVR target MCU.
Definition: AVRSubtarget.h:33
FunctionPass * createAVRExpandPseudoPass()
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:130
static const char * AVRDataLayout
static StringRef getCPU(StringRef CPU)
Processes a CPU name.
RegisterTargetMachine - Helper template for registering a target machine implementation, for use in the target machine initialization function.
FunctionPass * createAVRFrameAnalyzerPass()
Creates instance of the frame analyzer pass.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:47
AVRTargetMachine(const Target &T, const Triple &TT, StringRef CPU, StringRef FS, const TargetOptions &Options, Optional< Reloc::Model > RM, CodeModel::Model CM, CodeGenOpt::Level OL)
void initializeAVRExpandPseudoPass(PassRegistry &)
FunctionPass * createAVRDynAllocaSRPass()
createAVRDynAllocaSRPass - returns an instance of the dynalloca stack pointer save/restore pass...