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 
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                    Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM,
38                    CodeGenOpt::Level OL, bool JIT);
39   ~X86TargetMachine() override;
40 
41   const X86Subtarget *getSubtargetImpl(const Function &F) const override;
42   // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
43   // subtargets are per-function entities based on the target-specific
44   // attributes of each function.
45   const X86Subtarget *getSubtargetImpl() const = delete;
46 
47   TargetTransformInfo getTargetTransformInfo(const Function &F) override;
48 
49   // Set up the pass pipeline.
50   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
51 
getObjFileLowering()52   TargetLoweringObjectFile *getObjFileLowering() const override {
53     return TLOF.get();
54   }
55 
isJIT()56   bool isJIT() const { return IsJIT; }
57 
58   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
59 };
60 
61 } // end namespace llvm
62 
63 #endif // LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H
64