Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- TargetPfmCounters.td - Target Pfm Counters -*- tablegen ----------*-===//

//

// 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 defines the target-independent interfaces for performance counters.

//

//===----------------------------------------------------------------------===//

// Definition of a hardware counters from libpfm identifiers.

class PfmCounter<string counter> {

  // The name of the counter that measures events.

  // The name can be "some_counter + some_other_counter", in which case the

  // measured value is the sum of events on these counters.

  string Counter = counter;

}

// Issue counters can be tied to a ProcResource

class PfmIssueCounter<string resource_name, string counter>

    : PfmCounter<counter> {

  // The name of the ProcResource on which uops are issued. This is used by

  // llvm-exegesis to compare measurements with values in the SchedModels.

  // If the CPU has a sched model, this should correspond to the name of a

  // ProcResource.

  string ResourceName = resource_name;

}

def NoPfmCounter : PfmCounter <""> {}

// Set of PfmCounters for measuring sched model characteristics.

class ProcPfmCounters {

  // Processors can define how to measure cycles by defining a CycleCounter.

  PfmCounter CycleCounter = NoPfmCounter;

  // Processors can define how to measure uops by defining a UopsCounter.

  PfmCounter UopsCounter = NoPfmCounter;

  // Processors can define how to measure issued uops by defining IssueCounters.

  list<PfmIssueCounter> IssueCounters = [];

}

// A binding of a set of counters to a CPU.

class PfmCountersBinding<string cpu_name, ProcPfmCounters counters> {

  string CpuName = cpu_name;

  ProcPfmCounters Counters = counters;

}

// Declares the default binding for unbound CPUs for the target.

class PfmCountersDefaultBinding<ProcPfmCounters counters>

    : PfmCountersBinding<"", counters> {}