LLVM  10.0.0svn
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"
16 #include "llvm/CodeGen/Passes.h"
20 #include "llvm/MC/MCAsmInfo.h"
22 using namespace llvm;
23 
24 extern "C" void LLVMInitializeMSP430Target() {
25  // Register the target.
27 }
28 
30  if (!RM.hasValue())
31  return Reloc::Static;
32  return *RM;
33 }
34 
35 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
36  const TargetOptions &Options) {
37  return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
38 }
39 
41  StringRef CPU, StringRef FS,
42  const TargetOptions &Options,
45  CodeGenOpt::Level OL, bool JIT)
46  : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
47  Options, getEffectiveRelocModel(RM),
48  getEffectiveCodeModel(CM, CodeModel::Small), OL),
49  TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
50  Subtarget(TT, CPU, FS, *this) {
51  initAsmInfo();
52 }
53 
55 
56 namespace {
57 /// MSP430 Code Generator Pass Configuration Options.
58 class MSP430PassConfig : public TargetPassConfig {
59 public:
60  MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
61  : TargetPassConfig(TM, PM) {}
62 
63  MSP430TargetMachine &getMSP430TargetMachine() const {
64  return getTM<MSP430TargetMachine>();
65  }
66 
67  bool addInstSelector() override;
68  void addPreEmitPass() override;
69 };
70 } // namespace
71 
73  return new MSP430PassConfig(*this, PM);
74 }
75 
76 bool MSP430PassConfig::addInstSelector() {
77  // Install an instruction selector.
78  addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
79  return false;
80 }
81 
82 void MSP430PassConfig::addPreEmitPass() {
83  // Must run branch selection immediately preceding the asm printer.
84  addPass(createMSP430BranchSelectionPass(), false);
85 }
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()
FunctionPass * createMSP430ISelDag(MSP430TargetMachine &TM, CodeGenOpt::Level OptLevel)
createMSP430ISelDag - This pass converts a legalized DAG into a MSP430-specific DAG, ready for instruction scheduling.
Definition: BitVector.h:937
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)