LLVM  9.0.0svn
MSP430TargetMachine.cpp
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1 //===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
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 // Top-level implementation for the MSP430 target.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "MSP430TargetMachine.h"
14 #include "MSP430.h"
15 #include "llvm/CodeGen/Passes.h"
19 #include "llvm/MC/MCAsmInfo.h"
21 using namespace llvm;
22 
23 extern "C" void LLVMInitializeMSP430Target() {
24  // Register the target.
26 }
27 
29  if (!RM.hasValue())
30  return Reloc::Static;
31  return *RM;
32 }
33 
34 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
35  const TargetOptions &Options) {
36  return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
37 }
38 
40  StringRef CPU, StringRef FS,
41  const TargetOptions &Options,
44  CodeGenOpt::Level OL, bool JIT)
45  : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
46  Options, getEffectiveRelocModel(RM),
47  getEffectiveCodeModel(CM, CodeModel::Small), OL),
49  Subtarget(TT, CPU, FS, *this) {
50  initAsmInfo();
51 }
52 
54 
55 namespace {
56 /// MSP430 Code Generator Pass Configuration Options.
57 class MSP430PassConfig : public TargetPassConfig {
58 public:
59  MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
60  : TargetPassConfig(TM, PM) {}
61 
62  MSP430TargetMachine &getMSP430TargetMachine() const {
63  return getTM<MSP430TargetMachine>();
64  }
65 
66  bool addInstSelector() override;
67  void addPreEmitPass() override;
68 };
69 } // namespace
70 
72  return new MSP430PassConfig(*this, PM);
73 }
74 
75 bool MSP430PassConfig::addInstSelector() {
76  // Install an instruction selector.
77  addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
78  return false;
79 }
80 
81 void MSP430PassConfig::addPreEmitPass() {
82  // Must run branch selection immediately preceding the asm printer.
83  addPass(createMSP430BranchSelectionPass(), false);
84 }
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
Target & getTheMSP430Target()
CodeModel::Model getEffectiveCodeModel(Optional< CodeModel::Model > CM, CodeModel::Model Default)
Helper method for getting the code model, returning Default if CM does not have a value...
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void LLVMInitializeMSP430Target()
std::enable_if<!std::is_array< T >::value, std::unique_ptr< T > >::type make_unique(Args &&... args)
Constructs a new T() with the given args and returns a unique_ptr<T> which owns the object...
Definition: STLExtras.h:1393
FunctionPass * createMSP430ISelDag(MSP430TargetMachine &TM, CodeGenOpt::Level OptLevel)
createMSP430ISelDag - This pass converts a legalized DAG into a MSP430-specific DAG, ready for instruction scheduling.
Target-Independent Code Generator Pass Configuration Options.
RegisterTargetMachine - Helper template for registering a target machine implementation, for use in the target machine initialization function.
FunctionPass * createMSP430BranchSelectionPass()
Returns an instance of the Branch Selection Pass.
CodeGenOpt::Level getOptLevel() const
Returns the optimization level: None, Less, Default, or Aggressive.
static Reloc::Model getEffectiveRelocModel(Optional< Reloc::Model > RM)
This class describes a target machine that is implemented with the LLVM target-independent code gener...
MSP430TargetMachine.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
PassManagerBase - An abstract interface to allow code to add passes to a pass manager without having ...
static std::string computeDataLayout(const Triple &TT, StringRef CPU, const TargetOptions &Options)
Target - Wrapper for Target specific information.
bool hasValue() const
Definition: Optional.h:259
TargetPassConfig * createPassConfig(PassManagerBase &PM) override
Create a pass configuration object to be used by addPassToEmitX methods for generating a pipeline of ...
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
MSP430TargetMachine(const Target &T, const Triple &TT, StringRef CPU, StringRef FS, const TargetOptions &Options, Optional< Reloc::Model > RM, Optional< CodeModel::Model > CM, CodeGenOpt::Level OL, bool JIT)