1 //===-- PPCTargetMachine.h - Define TargetMachine for PowerPC ---*- 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 PowerPC specific subclass of TargetMachine.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_POWERPC_PPCTARGETMACHINE_H
14 #define LLVM_LIB_TARGET_POWERPC_PPCTARGETMACHINE_H
15 
16 #include "PPCInstrInfo.h"
17 #include "PPCSubtarget.h"
18 #include "llvm/IR/DataLayout.h"
19 #include "llvm/Target/TargetMachine.h"
20 
21 namespace llvm {
22 
23 /// Common code between 32-bit and 64-bit PowerPC targets.
24 ///
25 class PPCTargetMachine final : public LLVMTargetMachine {
26 public:
27   enum PPCABI { PPC_ABI_UNKNOWN, PPC_ABI_ELFv1, PPC_ABI_ELFv2 };
28 private:
29   std::unique_ptr<TargetLoweringObjectFile> TLOF;
30   PPCABI TargetABI;
31 
32   mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap;
33 
34 public:
35   PPCTargetMachine(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 
40   ~PPCTargetMachine() override;
41 
42   const PPCSubtarget *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 PPCSubtarget *getSubtargetImpl() const = delete;
47 
48   // Pass Pipeline Configuration
49   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
50 
51   TargetTransformInfo getTargetTransformInfo(const Function &F) override;
52 
53   TargetLoweringObjectFile *getObjFileLowering() const override {
54     return TLOF.get();
55   }
56   bool isELFv2ABI() const { return TargetABI == PPC_ABI_ELFv2; }
57   bool isPPC64() const {
58     const Triple &TT = getTargetTriple();
59     return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le);
60   };
61 
62   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
63     // Addrspacecasts are always noops.
64     return true;
65   }
66 };
67 } // end namespace llvm
68 
69 #endif
70