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 Endian { NOT_DETECTED, LITTLE, BIG };
29
30private:
31 std::unique_ptr<TargetLoweringObjectFile> TLOF;
32 Endian Endianness = Endian::NOT_DETECTED;
33 mutable bool HasGlibcHWCAPAccess = false;
34
35 mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap;
36
37public:
38 PPCTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
39 StringRef FS, const TargetOptions &Options,
40 std::optional<Reloc::Model> RM,
41 std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
42 bool JIT);
43
44 ~PPCTargetMachine() override;
45
46 const PPCSubtarget *getSubtargetImpl(const Function &F) const override;
47 // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
48 // subtargets are per-function entities based on the target-specific
49 // attributes of each function.
50 const PPCSubtarget *getSubtargetImpl() const = delete;
51
52 // Pass Pipeline Configuration
53 TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
54
55 TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
56
57 TargetLoweringObjectFile *getObjFileLowering() const override {
58 return TLOF.get();
59 }
60
61 MachineFunctionInfo *
62 createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
63 const TargetSubtargetInfo *STI) const override;
64 ScheduleDAGInstrs *
65 createMachineScheduler(MachineSchedContext *C) const override;
66 ScheduleDAGInstrs *
67 createPostMachineScheduler(MachineSchedContext *C) const override;
68
69 /// Compute the ABI variant for \p TT and \p ABIName (the "target-abi" module
70 /// flag), falling back to the triple default.
71 static PPCABI computeABI(const Triple &TT, StringRef ABIName);
72
73 bool hasGlibcHWCAPAccess() const { return HasGlibcHWCAPAccess; }
74 void setGlibcHWCAPAccess(bool Val = true) const { HasGlibcHWCAPAccess = Val; }
75 bool isPPC64() const {
76 const Triple &TT = getTargetTriple();
77 return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le);
78 };
79
80 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
81 // Addrspacecasts are always noops.
82 return true;
83 }
84
85 bool isLittleEndian() const;
86
87 int unqualifiedInlineAsmVariant() const override { return 1; }
88};
89} // end namespace llvm
90
91#endif
92