1 //===-- X86TargetMachine.h - Define TargetMachine for the X86 ---*- 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 X86 specific subclass of TargetMachine.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H
14 #define LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H
15 
16 #include "X86Subtarget.h"
17 #include "llvm/ADT/StringMap.h"
18 #include "llvm/Support/CodeGen.h"
19 #include "llvm/Target/TargetMachine.h"
20 #include <memory>
21 #include <optional>
22 
23 namespace llvm {
24 
25 class StringRef;
26 class TargetTransformInfo;
27 
28 class X86TargetMachine final : public LLVMTargetMachine {
29   std::unique_ptr<TargetLoweringObjectFile> TLOF;
30   mutable StringMap<std::unique_ptr<X86Subtarget>> SubtargetMap;
31   // True if this is used in JIT.
32   bool IsJIT;
33 
34 public:
35   X86TargetMachine(const Target &T, const Triple &TT, StringRef CPU,
36                    StringRef FS, const TargetOptions &Options,
37                    std::optional<Reloc::Model> RM,
38                    std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
39                    bool JIT);
40   ~X86TargetMachine() override;
41 
42   const X86Subtarget *getSubtargetImpl(const Function &F) const override;
43   // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
44   // subtargets are per-function entities based on the target-specific
45   // attributes of each function.
46   const X86Subtarget *getSubtargetImpl() const = delete;
47 
48   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
49 
50   // Set up the pass pipeline.
51   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
52 
53   TargetLoweringObjectFile *getObjFileLowering() const override {
54     return TLOF.get();
55   }
56 
57   MachineFunctionInfo *
58   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
59                             const TargetSubtargetInfo *STI) const override;
60 
61   bool isJIT() const { return IsJIT; }
62 
63   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
64 };
65 
66 } // end namespace llvm
67 
68 #endif // LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H
69