94 lines
3 KiB
C++
94 lines
3 KiB
C++
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//===- BPFInstructionSelector.cpp --------------------------------*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file implements the targeting of the InstructionSelector class for BPF.
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//===----------------------------------------------------------------------===//
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#include "BPFInstrInfo.h"
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#include "BPFRegisterBankInfo.h"
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#include "BPFSubtarget.h"
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#include "BPFTargetMachine.h"
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#include "llvm/CodeGen/GlobalISel/GIMatchTableExecutorImpl.h"
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#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
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#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/IR/IntrinsicsBPF.h"
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#include "llvm/Support/Debug.h"
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#define DEBUG_TYPE "bpf-gisel"
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using namespace llvm;
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namespace {
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#define GET_GLOBALISEL_PREDICATE_BITSET
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_PREDICATE_BITSET
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class BPFInstructionSelector : public InstructionSelector {
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public:
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BPFInstructionSelector(const BPFTargetMachine &TM, const BPFSubtarget &STI,
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const BPFRegisterBankInfo &RBI);
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bool select(MachineInstr &I) override;
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static const char *getName() { return DEBUG_TYPE; }
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private:
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/// tblgen generated 'select' implementation that is used as the initial
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/// selector for the patterns that do not require complex C++.
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bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const;
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const BPFInstrInfo &TII;
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const BPFRegisterInfo &TRI;
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const BPFRegisterBankInfo &RBI;
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#define GET_GLOBALISEL_PREDICATES_DECL
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_PREDICATES_DECL
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#define GET_GLOBALISEL_TEMPORARIES_DECL
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_TEMPORARIES_DECL
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};
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} // namespace
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#define GET_GLOBALISEL_IMPL
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_IMPL
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BPFInstructionSelector::BPFInstructionSelector(const BPFTargetMachine &TM,
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const BPFSubtarget &STI,
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const BPFRegisterBankInfo &RBI)
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: TII(*STI.getInstrInfo()), TRI(*STI.getRegisterInfo()), RBI(RBI),
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#define GET_GLOBALISEL_PREDICATES_INIT
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_PREDICATES_INIT
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#define GET_GLOBALISEL_TEMPORARIES_INIT
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#include "BPFGenGlobalISel.inc"
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#undef GET_GLOBALISEL_TEMPORARIES_INIT
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{
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}
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bool BPFInstructionSelector::select(MachineInstr &I) {
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if (!isPreISelGenericOpcode(I.getOpcode()))
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return true;
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if (selectImpl(I, *CoverageInfo))
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return true;
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return false;
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}
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namespace llvm {
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InstructionSelector *
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createBPFInstructionSelector(const BPFTargetMachine &TM,
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const BPFSubtarget &Subtarget,
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const BPFRegisterBankInfo &RBI) {
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return new BPFInstructionSelector(TM, Subtarget, RBI);
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}
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} // namespace llvm
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