1 // WebAssemblyTargetMachine.h - Define TargetMachine for WebAssembly -*- 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 /// \file
10 /// This file declares the WebAssembly-specific subclass of
11 /// TargetMachine.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETMACHINE_H
16 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYTARGETMACHINE_H
17 
18 #include "WebAssemblySubtarget.h"
19 #include "llvm/Target/TargetMachine.h"
20 #include <optional>
21 
22 namespace llvm {
23 
24 class WebAssemblyTargetMachine final : public LLVMTargetMachine {
25   std::unique_ptr<TargetLoweringObjectFile> TLOF;
26   mutable StringMap<std::unique_ptr<WebAssemblySubtarget>> SubtargetMap;
27 
28 public:
29   WebAssemblyTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
30                            StringRef FS, const TargetOptions &Options,
31                            std::optional<Reloc::Model> RM,
32                            std::optional<CodeModel::Model> CM,
33                            CodeGenOpt::Level OL, bool JIT);
34 
35   ~WebAssemblyTargetMachine() override;
36 
37   const WebAssemblySubtarget *getSubtargetImpl() const;
38   const WebAssemblySubtarget *getSubtargetImpl(std::string CPU,
39                                                std::string FS) const;
40   const WebAssemblySubtarget *
41   getSubtargetImpl(const Function &F) const override;
42 
43   // Pass Pipeline Configuration
44   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
45 
46   TargetLoweringObjectFile *getObjFileLowering() const override {
47     return TLOF.get();
48   }
49 
50   MachineFunctionInfo *
51   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
52                             const TargetSubtargetInfo *STI) const override;
53 
54   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
55 
56   bool usesPhysRegsForValues() const override { return false; }
57 
58   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
59   yaml::MachineFunctionInfo *
60   convertFuncInfoToYAML(const MachineFunction &MF) const override;
61   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
62                                 PerFunctionMIParsingState &PFS,
63                                 SMDiagnostic &Error,
64                                 SMRange &SourceRange) const override;
65 };
66 
67 } // end namespace llvm
68 
69 #endif
70