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 
21 namespace llvm {
22 
23 class WebAssemblyTargetMachine final : public LLVMTargetMachine {
24   std::unique_ptr<TargetLoweringObjectFile> TLOF;
25   mutable StringMap<std::unique_ptr<WebAssemblySubtarget>> SubtargetMap;
26   mutable FeatureBitset UsedFeatures;
27 
28 public:
29   WebAssemblyTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
30                            StringRef FS, const TargetOptions &Options,
31                            Optional<Reloc::Model> RM,
32                            Optional<CodeModel::Model> CM, CodeGenOpt::Level OL,
33                            bool JIT);
34 
35   ~WebAssemblyTargetMachine() override;
36 
37   const WebAssemblySubtarget *getSubtargetImpl(std::string CPU,
38                                                std::string FS) const;
39   const WebAssemblySubtarget *
40   getSubtargetImpl(const Function &F) const override;
41 
42   // Pass Pipeline Configuration
43   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
44 
45   TargetLoweringObjectFile *getObjFileLowering() const override {
46     return TLOF.get();
47   }
48 
49   FeatureBitset getUsedFeatures() const { return UsedFeatures; }
50 
51   TargetTransformInfo getTargetTransformInfo(const Function &F) override;
52 
53   bool usesPhysRegsForPEI() const override { return false; }
54 };
55 
56 } // end namespace llvm
57 
58 #endif
59