xref: /freebsd/contrib/llvm-project/llvm/lib/Target/AArch64/AArch64TargetMachine.h (revision 9bc300465e48e19d794d88d0c158a2adb92c7197)
1 //==-- AArch64TargetMachine.h - Define TargetMachine for AArch64 -*- C++ -*-==//
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 // This file declares the AArch64 specific subclass of TargetMachine.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H
14 #define LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H
15 
16 #include "AArch64InstrInfo.h"
17 #include "AArch64LoopIdiomTransform.h"
18 #include "AArch64Subtarget.h"
19 #include "llvm/IR/DataLayout.h"
20 #include "llvm/Target/TargetMachine.h"
21 #include <optional>
22 
23 namespace llvm {
24 
25 class AArch64TargetMachine : public LLVMTargetMachine {
26 protected:
27   std::unique_ptr<TargetLoweringObjectFile> TLOF;
28   mutable StringMap<std::unique_ptr<AArch64Subtarget>> SubtargetMap;
29 
30 public:
31   AArch64TargetMachine(const Target &T, const Triple &TT, StringRef CPU,
32                        StringRef FS, const TargetOptions &Options,
33                        std::optional<Reloc::Model> RM,
34                        std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
35                        bool JIT, bool IsLittleEndian);
36 
37   ~AArch64TargetMachine() override;
38   const AArch64Subtarget *getSubtargetImpl(const Function &F) const override;
39   // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
40   // subtargets are per-function entities based on the target-specific
41   // attributes of each function.
42   const AArch64Subtarget *getSubtargetImpl() const = delete;
43 
44   // Pass Pipeline Configuration
45   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
46 
47   void registerPassBuilderCallbacks(PassBuilder &PB,
48                                     bool PopulateClassToPassNames) override;
49 
50   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
51 
52   TargetLoweringObjectFile* getObjFileLowering() const override {
53     return TLOF.get();
54   }
55 
56   MachineFunctionInfo *
57   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
58                             const TargetSubtargetInfo *STI) const override;
59 
60   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
61   yaml::MachineFunctionInfo *
62   convertFuncInfoToYAML(const MachineFunction &MF) const override;
63   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
64                                 PerFunctionMIParsingState &PFS,
65                                 SMDiagnostic &Error,
66                                 SMRange &SourceRange) const override;
67 
68   /// Returns true if a cast between SrcAS and DestAS is a noop.
69   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
70     // Addrspacecasts are always noops.
71     return true;
72   }
73 
74 private:
75   bool isLittle;
76 };
77 
78 // AArch64 little endian target machine.
79 //
80 class AArch64leTargetMachine : public AArch64TargetMachine {
81   virtual void anchor();
82 
83 public:
84   AArch64leTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
85                          StringRef FS, const TargetOptions &Options,
86                          std::optional<Reloc::Model> RM,
87                          std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
88                          bool JIT);
89 };
90 
91 // AArch64 big endian target machine.
92 //
93 class AArch64beTargetMachine : public AArch64TargetMachine {
94   virtual void anchor();
95 
96 public:
97   AArch64beTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
98                          StringRef FS, const TargetOptions &Options,
99                          std::optional<Reloc::Model> RM,
100                          std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
101                          bool JIT);
102 };
103 
104 } // end namespace llvm
105 
106 #endif
107