LLVM  16.0.0git
CSKYTargetMachine.cpp
Go to the documentation of this file.
1 //===--- CSKYTargetMachine.cpp - Define TargetMachine for CSKY ------------===//
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 // Implements the info about CSKY target spec.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "CSKYTargetMachine.h"
14 #include "CSKY.h"
15 #include "CSKYSubtarget.h"
16 #include "CSKYTargetObjectFile.h"
22 #include "llvm/MC/TargetRegistry.h"
23 #include <optional>
24 
25 using namespace llvm;
26 
29 
32 }
33 
34 static std::string computeDataLayout(const Triple &TT) {
35  std::string Ret;
36 
37  // Only support little endian for now.
38  // TODO: Add support for big endian.
39  Ret += "e";
40 
41  // CSKY is always 32-bit target with the CSKYv2 ABI as prefer now.
42  // It's a 4-byte aligned stack with ELF mangling only.
43  Ret += "-m:e-S32-p:32:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:32"
44  "-v128:32:32-a:0:32-Fi32-n32";
45 
46  return Ret;
47 }
48 
50  StringRef CPU, StringRef FS,
51  const TargetOptions &Options,
52  std::optional<Reloc::Model> RM,
53  std::optional<CodeModel::Model> CM,
54  CodeGenOpt::Level OL, bool JIT)
56  RM.value_or(Reloc::Static),
58  TLOF(std::make_unique<CSKYELFTargetObjectFile>()) {
59  initAsmInfo();
60 }
61 
62 const CSKYSubtarget *
64  Attribute CPUAttr = F.getFnAttribute("target-cpu");
65  Attribute TuneAttr = F.getFnAttribute("tune-cpu");
66  Attribute FSAttr = F.getFnAttribute("target-features");
67 
68  std::string CPU =
69  CPUAttr.isValid() ? CPUAttr.getValueAsString().str() : TargetCPU;
70  std::string TuneCPU =
71  TuneAttr.isValid() ? TuneAttr.getValueAsString().str() : CPU;
72  std::string FS =
73  FSAttr.isValid() ? FSAttr.getValueAsString().str() : TargetFS;
74 
75  std::string Key = CPU + TuneCPU + FS;
76  auto &I = SubtargetMap[Key];
77  if (!I) {
78  // This needs to be done before we create a new subtarget since any
79  // creation will depend on the TM and the code generation flags on the
80  // function that reside in TargetOptions.
82  I = std::make_unique<CSKYSubtarget>(TargetTriple, CPU, TuneCPU, FS, *this);
83  if (I->useHardFloat() && !I->hasAnyFloatExt())
84  errs() << "Hard-float can't be used with current CPU,"
85  " set to Soft-float\n";
86  }
87  return I.get();
88 }
89 
90 namespace {
91 class CSKYPassConfig : public TargetPassConfig {
92 public:
93  CSKYPassConfig(CSKYTargetMachine &TM, PassManagerBase &PM)
94  : TargetPassConfig(TM, PM) {}
95 
96  CSKYTargetMachine &getCSKYTargetMachine() const {
97  return getTM<CSKYTargetMachine>();
98  }
99 
100  void addIRPasses() override;
101  bool addInstSelector() override;
102  void addPreEmitPass() override;
103 };
104 
105 } // namespace
106 
108  return new CSKYPassConfig(*this, PM);
109 }
110 
111 void CSKYPassConfig::addIRPasses() {
112  addPass(createAtomicExpandPass());
114 }
115 
116 bool CSKYPassConfig::addInstSelector() {
117  addPass(createCSKYISelDag(getCSKYTargetMachine()));
118 
119  return false;
120 }
121 
122 void CSKYPassConfig::addPreEmitPass() {
123  addPass(createCSKYConstantIslandPass());
124 }
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
llvm::Attribute::isValid
bool isValid() const
Return true if the attribute is any kind of attribute.
Definition: Attributes.h:185
llvm::TargetOptions
Definition: TargetOptions.h:124
T
llvm::Function
Definition: Function.h:60
llvm::Attribute
Definition: Attributes.h:67
llvm::CSKYTargetMachine::CSKYTargetMachine
CSKYTargetMachine(const Target &T, const Triple &TT, StringRef CPU, StringRef FS, const TargetOptions &Options, std::optional< Reloc::Model > RM, std::optional< CodeModel::Model > CM, CodeGenOpt::Level OL, bool JIT)
Definition: CSKYTargetMachine.cpp:49
llvm::Target
Target - Wrapper for Target specific information.
Definition: TargetRegistry.h:149
CSKYTargetMachine.h
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
CSKY.h
LLVMInitializeCSKYTarget
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYTarget()
Definition: CSKYTargetMachine.cpp:27
llvm::errs
raw_fd_ostream & errs()
This returns a reference to a raw_ostream for standard error.
Definition: raw_ostream.cpp:891
llvm::MipsISD::Ret
@ Ret
Definition: MipsISelLowering.h:119
llvm::createCSKYISelDag
FunctionPass * createCSKYISelDag(CSKYTargetMachine &TM)
Definition: CSKYISelDAGToDAG.cpp:397
F
#define F(x, y, z)
Definition: MD5.cpp:55
llvm::getTheCSKYTarget
Target & getTheCSKYTarget()
Definition: CSKYTargetInfo.cpp:13
llvm::MSP430Attrs::CodeModel
CodeModel
Definition: MSP430Attributes.h:37
llvm::PassRegistry::getPassRegistry
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
Definition: PassRegistry.cpp:24
CSKYSubtarget.h
llvm::AMDGPU::PALMD::Key
Key
PAL metadata keys.
Definition: AMDGPUMetadata.h:486
computeDataLayout
static std::string computeDataLayout(const Triple &TT)
Definition: CSKYTargetMachine.cpp:34
llvm::CodeModel::Small
@ Small
Definition: CodeGen.h:28
llvm::createAtomicExpandPass
FunctionPass * createAtomicExpandPass()
AtomicExpandPass - At IR level this pass replace atomic instructions with __atomic_* library calls,...
llvm::RegisterTargetMachine
RegisterTargetMachine - Helper template for registering a target machine implementation,...
Definition: TargetRegistry.h:1354
llvm::PassRegistry
PassRegistry - This class manages the registration and intitialization of the pass subsystem as appli...
Definition: PassRegistry.h:38
Options
const char LLVMTargetMachineRef LLVMPassBuilderOptionsRef Options
Definition: PassBuilderBindings.cpp:48
llvm::TargetMachine::TargetFS
std::string TargetFS
Definition: TargetMachine.h:97
llvm::Attribute::getValueAsString
StringRef getValueAsString() const
Return the attribute's value as a string.
Definition: Attributes.cpp:312
llvm::CSKYSubtarget
Definition: CSKYSubtarget.h:30
X
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
llvm::TargetMachine::resetTargetOptions
void resetTargetOptions(const Function &F) const
Reset the target options based on the function's attributes.
Definition: TargetMachine.cpp:53
llvm::CSKYTargetMachine::createPassConfig
TargetPassConfig * createPassConfig(PassManagerBase &PM) override
Create a pass configuration object to be used by addPassToEmitX methods for generating a pipeline of ...
Definition: CSKYTargetMachine.cpp:107
llvm::TargetPassConfig
Target-Independent Code Generator Pass Configuration Options.
Definition: TargetPassConfig.h:84
llvm::TargetMachine::TargetTriple
Triple TargetTriple
Triple string, CPU name, and target feature strings the TargetMachine instance is created with.
Definition: TargetMachine.h:95
llvm::getEffectiveCodeModel
CodeModel::Model getEffectiveCodeModel(std::optional< CodeModel::Model > CM, CodeModel::Model Default)
Helper method for getting the code model, returning Default if CM does not have a value.
Definition: TargetMachine.h:501
llvm::EngineKind::JIT
@ JIT
Definition: ExecutionEngine.h:524
LLVM_EXTERNAL_VISIBILITY
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:127
llvm::CSKYELFTargetObjectFile
Definition: CSKYTargetObjectFile.h:17
I
#define I(x, y, z)
Definition: MD5.cpp:58
llvm::TargetPassConfig::addIRPasses
virtual void addIRPasses()
Add common target configurable passes that perform LLVM IR to IR transforms following machine indepen...
Definition: TargetPassConfig.cpp:854
llvm::createCSKYConstantIslandPass
FunctionPass * createCSKYConstantIslandPass()
Returns a pass that converts branches to long branches.
Definition: CSKYConstantIslandPass.cpp:1366
TargetPassConfig.h
llvm::initializeCSKYConstantIslandsPass
void initializeCSKYConstantIslandsPass(PassRegistry &)
CSKYTargetObjectFile.h
llvm::X86AS::FS
@ FS
Definition: X86.h:200
llvm::AArch64::RM
@ RM
Definition: AArch64ISelLowering.h:493
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
TargetSubtargetInfo.h
llvm::CSKYTargetMachine
Definition: CSKYTargetMachine.h:23
llvm::CodeGenOpt::Level
Level
Definition: CodeGen.h:52
llvm::LLVMTargetMachine::initAsmInfo
void initAsmInfo()
Definition: LLVMTargetMachine.cpp:40
std
Definition: BitVector.h:851
MachineFrameInfo.h
llvm::LLVMTargetMachine
This class describes a target machine that is implemented with the LLVM target-independent code gener...
Definition: TargetMachine.h:408
llvm::Registry
A global registry used in conjunction with static constructors to make pluggable components (like tar...
Definition: Registry.h:44
CSKYTargetInfo.h
llvm::legacy::PassManagerBase
PassManagerBase - An abstract interface to allow code to add passes to a pass manager without having ...
Definition: LegacyPassManager.h:39
llvm::StringRef::str
std::string str() const
str - Get the contents as an std::string.
Definition: StringRef.h:221
TM
const char LLVMTargetMachineRef TM
Definition: PassBuilderBindings.cpp:47
TargetRegistry.h
llvm::TargetMachine::TargetCPU
std::string TargetCPU
Definition: TargetMachine.h:96
llvm::CSKYTargetMachine::getSubtargetImpl
const CSKYSubtarget * getSubtargetImpl() const =delete
TargetLoweringObjectFileImpl.h