//===--- OpenACCKinds.h - OpenACC Enums -------------------------*- 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
/// Defines some OpenACC-specific enums and functions.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_BASIC_OPENACCKINDS_H
#define LLVM_CLANG_BASIC_OPENACCKINDS_H

#include "clang/Basic/Diagnostic.h"
#include "llvm/Support/ErrorHandling.h"

namespace clang {
// Represents the Construct/Directive kind of a pragma directive. Note the
// OpenACC standard is inconsistent between calling these Construct vs
// Directive, but we're calling it a Directive to be consistent with OpenMP.
enum class OpenACCDirectiveKind {
  // Compute Constructs.
  Parallel,
  Serial,
  Kernels,

  // Data Environment. "enter data" and "exit data" are also referred to in the
  // Executable Directives section, but just as a back reference to the Data
  // Environment.
  Data,
  EnterData,
  ExitData,
  HostData,

  // Misc.
  Loop,
  Cache,

  // Combined Constructs.
  ParallelLoop,
  SerialLoop,
  KernelsLoop,

  // Atomic Construct.
  Atomic,

  // Declare Directive.
  Declare,

  // Executable Directives. "wait" is first referred to here, but ends up being
  // in its own section after "routine".
  Init,
  Shutdown,
  Set,
  Update,
  Wait,

  // Procedure Calls in Compute Regions.
  Routine,

  // Invalid.
  Invalid,
};

inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &Out,
                                             OpenACCDirectiveKind K) {
  switch (K) {
  case OpenACCDirectiveKind::Parallel:
    return Out << "parallel";

  case OpenACCDirectiveKind::Serial:
    return Out << "serial";

  case OpenACCDirectiveKind::Kernels:
    return Out << "kernels";

  case OpenACCDirectiveKind::Data:
    return Out << "data";

  case OpenACCDirectiveKind::EnterData:
    return Out << "enter data";

  case OpenACCDirectiveKind::ExitData:
    return Out << "exit data";

  case OpenACCDirectiveKind::HostData:
    return Out << "host_data";

  case OpenACCDirectiveKind::Loop:
    return Out << "loop";

  case OpenACCDirectiveKind::Cache:
    return Out << "cache";

  case OpenACCDirectiveKind::ParallelLoop:
    return Out << "parallel loop";

  case OpenACCDirectiveKind::SerialLoop:
    return Out << "serial loop";

  case OpenACCDirectiveKind::KernelsLoop:
    return Out << "kernels loop";

  case OpenACCDirectiveKind::Atomic:
    return Out << "atomic";

  case OpenACCDirectiveKind::Declare:
    return Out << "declare";

  case OpenACCDirectiveKind::Init:
    return Out << "init";

  case OpenACCDirectiveKind::Shutdown:
    return Out << "shutdown";

  case OpenACCDirectiveKind::Set:
    return Out << "set";

  case OpenACCDirectiveKind::Update:
    return Out << "update";

  case OpenACCDirectiveKind::Wait:
    return Out << "wait";

  case OpenACCDirectiveKind::Routine:
    return Out << "routine";

  case OpenACCDirectiveKind::Invalid:
    return Out << "<invalid>";
  }
  llvm_unreachable("Uncovered directive kind");
}

enum class OpenACCAtomicKind {
  Read,
  Write,
  Update,
  Capture,
  Invalid,
};

/// Represents the kind of an OpenACC clause.
enum class OpenACCClauseKind {
  /// 'finalize' clause, allowed on 'exit data' directive.
  Finalize,
  /// 'if_present' clause, allowed on 'host_data' and 'update' directives.
  IfPresent,
  /// 'seq' clause, allowed on 'loop' and 'routine' directives.
  Seq,
  /// 'independent' clause, allowed on 'loop' directives.
  Independent,
  /// 'auto' clause, allowed on 'loop' directives.
  Auto,
  /// 'worker' clause, allowed on 'loop', Combined, and 'routine' directives.
  Worker,
  /// 'vector' clause, allowed on 'loop', Combined, and 'routine' directives.
  Vector,
  /// 'nohost' clause, allowed on 'routine' directives.
  NoHost,
  /// 'default' clause, allowed on parallel, serial, kernel (and compound)
  /// constructs.
  Default,
  /// 'if' clause, allowed on all the Compute Constructs, Data Constructs,
  /// Executable Constructs, and Combined Constructs.
  If,
  /// 'self' clause, allowed on Compute and Combined Constructs, plus 'update'.
  Self,
  /// 'copy' clause, allowed on Compute and Combined Constructs, plus 'data' and
  /// 'declare'.
  Copy,
  /// 'use_device' clause, allowed on 'host_data' construct.
  UseDevice,
  /// 'attach' clause, allowed on Compute and Combined constructs, plus 'data'
  /// and 'enter data'.
  Attach,
  /// 'delete' clause, allowed on the 'exit data' construct.
  Delete,
  /// 'detach' clause, allowed on the 'exit data' construct.
  Detach,
  /// 'device' clause, allowed on the 'update' construct.
  Device,
  /// 'deviceptr' clause, allowed on Compute and Combined Constructs, plus
  /// 'data' and 'declare'.
  DevicePtr,
  /// 'device_resident' clause, allowed on the 'declare' construct.
  DeviceResident,
  /// 'firstprivate' clause, allowed on 'parallel', 'serial', 'parallel loop',
  /// and 'serial loop' constructs.
  FirstPrivate,
  /// 'host' clause, allowed on 'update' construct.
  Host,
  /// 'link' clause, allowed on 'declare' construct.
  Link,
  /// 'no_create' clause, allowed on allowed on Compute and Combined constructs,
  /// plus 'data'.
  NoCreate,
  /// 'present' clause, allowed on Compute and Combined constructs, plus 'data'
  /// and 'declare'.
  Present,
  /// 'private' clause, allowed on 'parallel', 'serial', 'loop', 'parallel
  /// loop', and 'serial loop' constructs.
  Private,
  /// 'copyout' clause, allowed on Compute and Combined constructs, plus 'data',
  /// 'exit data', and 'declare'.
  CopyOut,
  /// 'copyin' clause, allowed on Compute and Combined constructs, plus 'data',
  /// 'enter data', and 'declare'.
  CopyIn,
  /// 'copyin' clause, allowed on Compute and Combined constructs, plus 'data',
  /// 'enter data', and 'declare'.
  Create,
  /// 'reduction' clause, allowed on Parallel, Serial, Loop, and the combined
  /// constructs.
  Reduction,
  /// 'collapse' clause, allowed on 'loop' and Combined constructs.
  Collapse,
  /// 'bind' clause, allowed on routine constructs.
  Bind,
  /// 'vector_length' clause, allowed on 'parallel', 'kernels', 'parallel loop',
  /// and 'kernels loop' constructs.
  VectorLength,
  /// 'num_gangs' clause, allowed on 'parallel', 'kernels', parallel loop', and
  /// 'kernels loop' constructs.
  NumGangs,
  /// 'num_workers' clause, allowed on 'parallel', 'kernels', parallel loop',
  /// and 'kernels loop' constructs.
  NumWorkers,
  /// 'device_num' clause, allowed on 'init', 'shutdown', and 'set' constructs.
  DeviceNum,
  /// 'default_async' clause, allowed on 'set' construct.
  DefaultAsync,
  /// 'device_type' clause, allowed on Constructs, 'data', 'init', 'shutdown',
  /// 'set', update', 'loop', 'routine', and Combined constructs.
  DeviceType,
  /// 'dtype' clause, an alias for 'device_type', stored separately for
  /// diagnostic purposes.
  DType,

  /// Represents an invalid clause, for the purposes of parsing.
  Invalid,
};

inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &Out,
                                             OpenACCClauseKind K) {
  switch (K) {
  case OpenACCClauseKind::Finalize:
    return Out << "finalize";

  case OpenACCClauseKind::IfPresent:
    return Out << "if_present";

  case OpenACCClauseKind::Seq:
    return Out << "seq";

  case OpenACCClauseKind::Independent:
    return Out << "independent";

  case OpenACCClauseKind::Auto:
    return Out << "auto";

  case OpenACCClauseKind::Worker:
    return Out << "worker";

  case OpenACCClauseKind::Vector:
    return Out << "vector";

  case OpenACCClauseKind::NoHost:
    return Out << "nohost";

  case OpenACCClauseKind::Default:
    return Out << "default";

  case OpenACCClauseKind::If:
    return Out << "if";

  case OpenACCClauseKind::Self:
    return Out << "self";

  case OpenACCClauseKind::Copy:
    return Out << "copy";

  case OpenACCClauseKind::UseDevice:
    return Out << "use_device";

  case OpenACCClauseKind::Attach:
    return Out << "attach";

  case OpenACCClauseKind::Delete:
    return Out << "delete";

  case OpenACCClauseKind::Detach:
    return Out << "detach";

  case OpenACCClauseKind::Device:
    return Out << "device";

  case OpenACCClauseKind::DevicePtr:
    return Out << "deviceptr";

  case OpenACCClauseKind::DeviceResident:
    return Out << "device_resident";

  case OpenACCClauseKind::FirstPrivate:
    return Out << "firstprivate";

  case OpenACCClauseKind::Host:
    return Out << "host";

  case OpenACCClauseKind::Link:
    return Out << "link";

  case OpenACCClauseKind::NoCreate:
    return Out << "no_create";

  case OpenACCClauseKind::Present:
    return Out << "present";

  case OpenACCClauseKind::Private:
    return Out << "private";

  case OpenACCClauseKind::CopyOut:
    return Out << "copyout";

  case OpenACCClauseKind::CopyIn:
    return Out << "copyin";

  case OpenACCClauseKind::Create:
    return Out << "create";

  case OpenACCClauseKind::Reduction:
    return Out << "reduction";

  case OpenACCClauseKind::Collapse:
    return Out << "collapse";

  case OpenACCClauseKind::Bind:
    return Out << "bind";

  case OpenACCClauseKind::VectorLength:
    return Out << "vector_length";

  case OpenACCClauseKind::NumGangs:
    return Out << "num_gangs";

  case OpenACCClauseKind::NumWorkers:
    return Out << "num_workers";

  case OpenACCClauseKind::DeviceNum:
    return Out << "device_num";

  case OpenACCClauseKind::DefaultAsync:
    return Out << "default_async";

  case OpenACCClauseKind::DeviceType:
    return Out << "device_type";

  case OpenACCClauseKind::DType:
    return Out << "dtype";

  case OpenACCClauseKind::Invalid:
    return Out << "<invalid>";
  }
  llvm_unreachable("Uncovered clause kind");
}
enum class OpenACCDefaultClauseKind {
  /// 'none' option.
  None,
  /// 'present' option.
  Present,
  /// Not a valid option.
  Invalid,
};

enum class OpenACCReductionOperator {
  /// '+'.
  Addition,
  /// '*'.
  Multiplication,
  /// 'max'.
  Max,
  /// 'min'.
  Min,
  /// '&'.
  BitwiseAnd,
  /// '|'.
  BitwiseOr,
  /// '^'.
  BitwiseXOr,
  /// '&&'.
  And,
  /// '||'.
  Or,
  /// Invalid Reduction Clause Kind.
  Invalid,
};
} // namespace clang

#endif // LLVM_CLANG_BASIC_OPENACCKINDS_H