llvm/llvm/lib/CodeGen/PseudoProbeInserter.cpp

//===- PseudoProbeInserter.cpp - Insert annotation for callsite profiling -===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements PseudoProbeInserter pass, which inserts pseudo probe
// annotations for call instructions with a pseudo-probe-specific dwarf
// discriminator. such discriminator indicates that the call instruction comes
// with a pseudo probe, and the discriminator value holds information to
// identify the corresponding counter.
//===----------------------------------------------------------------------===//

#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PseudoProbe.h"
#include "llvm/InitializePasses.h"

#define DEBUG_TYPE …

usingnamespacellvm;

namespace {
class PseudoProbeInserter : public MachineFunctionPass { … };
} // namespace

char PseudoProbeInserter::ID = …;
INITIALIZE_PASS_BEGIN(PseudoProbeInserter, DEBUG_TYPE,
                      "Insert pseudo probe annotations for value profiling",
                      false, false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
INITIALIZE_PASS_END(PseudoProbeInserter, DEBUG_TYPE,
                    "Insert pseudo probe annotations for value profiling",
                    false, false)

FunctionPass *llvm::createPseudoProbeInserter() { … }