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