| 1 | //===- BPFInstructionSelector.cpp --------------------------------*- C++ -*-==// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | /// \file |
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| 9 | /// This file implements the targeting of the InstructionSelector class for BPF. |
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| 10 | //===----------------------------------------------------------------------===// |
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| 11 | |
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| 12 | #include "BPFInstrInfo.h" |
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| 13 | #include "BPFRegisterBankInfo.h" |
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| 14 | #include "BPFSubtarget.h" |
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| 15 | #include "BPFTargetMachine.h" |
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| 16 | #include "llvm/CodeGen/GlobalISel/GIMatchTableExecutorImpl.h" |
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| 17 | #include "llvm/CodeGen/GlobalISel/InstructionSelector.h" |
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| 18 | #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" |
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| 19 | #include "llvm/CodeGen/MachineFunction.h" |
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| 20 | #include "llvm/IR/IntrinsicsBPF.h" |
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| 21 | #include "llvm/Support/Debug.h" |
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| 22 | |
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| 23 | #define DEBUG_TYPE "bpf-gisel" |
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| 24 | |
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| 25 | using namespace llvm; |
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| 26 | |
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| 27 | namespace { |
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| 28 | |
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| 29 | #define GET_GLOBALISEL_PREDICATE_BITSET |
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| 30 | #include "BPFGenGlobalISel.inc" |
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| 31 | #undef GET_GLOBALISEL_PREDICATE_BITSET |
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| 32 | |
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| 33 | class BPFInstructionSelector : public InstructionSelector { |
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| 34 | public: |
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| 35 | BPFInstructionSelector(const BPFTargetMachine &TM, const BPFSubtarget &STI, |
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| 36 | const BPFRegisterBankInfo &RBI); |
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| 37 | |
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| 38 | bool select(MachineInstr &I) override; |
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| 39 | static const char *getName() { return DEBUG_TYPE; } |
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| 40 | |
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| 41 | private: |
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| 42 | /// tblgen generated 'select' implementation that is used as the initial |
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| 43 | /// selector for the patterns that do not require complex C++. |
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| 44 | bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const; |
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| 45 | |
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| 46 | const BPFInstrInfo &TII; |
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| 47 | const BPFRegisterInfo &TRI; |
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| 48 | const BPFRegisterBankInfo &RBI; |
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| 49 | |
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| 50 | #define GET_GLOBALISEL_PREDICATES_DECL |
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| 51 | #include "BPFGenGlobalISel.inc" |
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| 52 | #undef GET_GLOBALISEL_PREDICATES_DECL |
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| 53 | |
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| 54 | #define GET_GLOBALISEL_TEMPORARIES_DECL |
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| 55 | #include "BPFGenGlobalISel.inc" |
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| 56 | #undef GET_GLOBALISEL_TEMPORARIES_DECL |
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| 57 | }; |
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| 58 | |
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| 59 | } // namespace |
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| 60 | |
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| 61 | #define GET_GLOBALISEL_IMPL |
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| 62 | #include "BPFGenGlobalISel.inc" |
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| 63 | #undef GET_GLOBALISEL_IMPL |
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| 64 | |
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| 65 | BPFInstructionSelector::BPFInstructionSelector(const BPFTargetMachine &TM, |
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| 66 | const BPFSubtarget &STI, |
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| 67 | const BPFRegisterBankInfo &RBI) |
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| 68 | : TII(*STI.getInstrInfo()), TRI(*STI.getRegisterInfo()), RBI(RBI), |
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| 69 | #define GET_GLOBALISEL_PREDICATES_INIT |
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| 70 | #include "BPFGenGlobalISel.inc" |
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| 71 | #undef GET_GLOBALISEL_PREDICATES_INIT |
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| 72 | #define GET_GLOBALISEL_TEMPORARIES_INIT |
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| 73 | #include "BPFGenGlobalISel.inc" |
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| 74 | #undef GET_GLOBALISEL_TEMPORARIES_INIT |
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| 75 | { |
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| 76 | } |
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| 77 | |
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| 78 | bool BPFInstructionSelector::select(MachineInstr &I) { |
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| 79 | if (!isPreISelGenericOpcode(Opcode: I.getOpcode())) |
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| 80 | return true; |
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| 81 | if (selectImpl(I, CoverageInfo&: *CoverageInfo)) |
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| 82 | return true; |
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| 83 | return false; |
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| 84 | } |
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| 85 | |
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| 86 | namespace llvm { |
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| 87 | InstructionSelector * |
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| 88 | createBPFInstructionSelector(const BPFTargetMachine &TM, |
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| 89 | const BPFSubtarget &Subtarget, |
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| 90 | const BPFRegisterBankInfo &RBI) { |
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| 91 | return new BPFInstructionSelector(TM, Subtarget, RBI); |
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| 92 | } |
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| 93 | } // namespace llvm |
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| 94 | |
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