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