X86TargetMachine.h revision 363496 
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/Optional.h"
18#include "llvm/ADT/StringMap.h"
19#include "llvm/Support/CodeGen.h"
20#include "llvm/Target/TargetMachine.h"
21#include <memory>
22
23namespace llvm {
24
25class StringRef;
26class X86Subtarget;
27class X86RegisterBankInfo;
28class TargetTransformInfo;
29
30class X86TargetMachine final : public LLVMTargetMachine {
31  std::unique_ptr<TargetLoweringObjectFile> TLOF;
32  mutable StringMap<std::unique_ptr<X86Subtarget>> SubtargetMap;
33  // True if this is used in JIT.
34  bool IsJIT;
35
36public:
37  X86TargetMachine(const Target &T, const Triple &TT, StringRef CPU,
38                   StringRef FS, const TargetOptions &Options,
39                   Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM,
40                   CodeGenOpt::Level OL, bool JIT);
41  ~X86TargetMachine() override;
42
43  const X86Subtarget *getSubtargetImpl(const Function &F) const override;
44  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
45  // subtargets are per-function entities based on the target-specific
46  // attributes of each function.
47  const X86Subtarget *getSubtargetImpl() const = delete;
48
49  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
50
51  // Set up the pass pipeline.
52  TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
53
54  TargetLoweringObjectFile *getObjFileLowering() const override {
55    return TLOF.get();
56  }
57
58  bool isJIT() const { return IsJIT; }
59};
60
61} // end namespace llvm
62
63#endif // LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H
64