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/CodeGen/CodeGenTargetMachineImpl.h"
19#include "llvm/IR/DataLayout.h"
20#include <optional>
21
22namespace llvm {
23
24/// Common code between 32-bit and 64-bit PowerPC targets.
25///
26class PPCTargetMachine final : public CodeGenTargetMachineImpl {
27public:
28 enum PPCABI { PPC_ABI_UNKNOWN, PPC_ABI_ELFv1, PPC_ABI_ELFv2 };
29 enum Endian { NOT_DETECTED, LITTLE, BIG };
30
31private:
32 std::unique_ptr<TargetLoweringObjectFile> TLOF;
33 PPCABI TargetABI;
34 Endian Endianness = Endian::NOT_DETECTED;
35 mutable bool HasGlibcHWCAPAccess = false;
36
37 mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap;
38
39public:
40 PPCTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
41 StringRef FS, const TargetOptions &Options,
42 std::optional<Reloc::Model> RM,
43 std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
44 bool JIT);
45
46 ~PPCTargetMachine() override;
47
48 const PPCSubtarget *getSubtargetImpl(const Function &F) const override;
49 // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
50 // subtargets are per-function entities based on the target-specific
51 // attributes of each function.
52 const PPCSubtarget *getSubtargetImpl() const = delete;
53
54 // Pass Pipeline Configuration
55 TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
56
57 TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
58
59 TargetLoweringObjectFile *getObjFileLowering() const override {
60 return TLOF.get();
61 }
62
63 MachineFunctionInfo *
64 createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
65 const TargetSubtargetInfo *STI) const override;
66 ScheduleDAGInstrs *
67 createMachineScheduler(MachineSchedContext *C) const override;
68 ScheduleDAGInstrs *
69 createPostMachineScheduler(MachineSchedContext *C) const override;
70
71 bool isELFv2ABI() const { return TargetABI == PPC_ABI_ELFv2; }
72 bool hasGlibcHWCAPAccess() const { return HasGlibcHWCAPAccess; }
73 void setGlibcHWCAPAccess(bool Val = true) const { HasGlibcHWCAPAccess = Val; }
74 bool isPPC64() const {
75 const Triple &TT = getTargetTriple();
76 return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le);
77 };
78
79 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
80 // Addrspacecasts are always noops.
81 return true;
82 }
83
84 bool isLittleEndian() const;
85
86 int unqualifiedInlineAsmVariant() const override { return 1; }
87};
88} // end namespace llvm
89
90#endif
91