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//===- Action.h - Abstract compilation steps --------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_DRIVER_ACTION_H
#define LLVM_CLANG_DRIVER_ACTION_H
#include "clang/Basic/LLVM.h"
#include "clang/Driver/Types.h"
#include "clang/Driver/Util.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include <string>
namespace llvm {
namespace opt {
class Arg;
} // namespace opt
} // namespace llvm
namespace clang {
namespace driver {
class ToolChain;
/// Action - Represent an abstract compilation step to perform.
///
/// An action represents an edge in the compilation graph; typically
/// it is a job to transform an input using some tool.
///
/// The current driver is hard wired to expect actions which produce a
/// single primary output, at least in terms of controlling the
/// compilation. Actions can produce auxiliary files, but can only
/// produce a single output to feed into subsequent actions.
///
/// Actions are usually owned by a Compilation, which creates new
/// actions via MakeAction().
class Action {
public:
using size_type = ActionList::size_type;
using input_iterator = ActionList::iterator;
using input_const_iterator = ActionList::const_iterator;
using input_range = llvm::iterator_range<input_iterator>;
using input_const_range = llvm::iterator_range<input_const_iterator>;
enum ActionClass {
InputClass = 0,
BindArchClass,
OffloadClass,
PreprocessJobClass,
PrecompileJobClass,
ExtractAPIJobClass,
AnalyzeJobClass,
MigrateJobClass,
CompileJobClass,
BackendJobClass,
AssembleJobClass,
LinkJobClass,
IfsMergeJobClass,
LipoJobClass,
DsymutilJobClass,
VerifyDebugInfoJobClass,
VerifyPCHJobClass,
OffloadBundlingJobClass,
OffloadUnbundlingJobClass,
OffloadPackagerJobClass,
LinkerWrapperJobClass,
StaticLibJobClass,
BinaryAnalyzeJobClass,
JobClassFirst = PreprocessJobClass,
JobClassLast = BinaryAnalyzeJobClass
};
// The offloading kind determines if this action is binded to a particular
// programming model. Each entry reserves one bit. We also have a special kind
// to designate the host offloading tool chain.
enum OffloadKind {
OFK_None = 0x00,
// The host offloading tool chain.
OFK_Host = 0x01,
// The device offloading tool chains - one bit for each programming model.
OFK_Cuda = 0x02,
OFK_OpenMP = 0x04,
OFK_HIP = 0x08,
};
static const char *getClassName(ActionClass AC);
private:
ActionClass Kind;
/// The output type of this action.
types::ID Type;
ActionList Inputs;
/// Flag that is set to true if this action can be collapsed with others
/// actions that depend on it. This is true by default and set to false when
/// the action is used by two different tool chains, which is enabled by the
/// offloading support implementation.
bool CanBeCollapsedWithNextDependentAction = true;
protected:
///
/// Offload information.
///
/// The host offloading kind - a combination of kinds encoded in a mask.
/// Multiple programming models may be supported simultaneously by the same
/// host.
unsigned ActiveOffloadKindMask = 0u;
/// Offloading kind of the device.
OffloadKind OffloadingDeviceKind = OFK_None;
/// The Offloading architecture associated with this action.
const char *OffloadingArch = nullptr;
/// The Offloading toolchain associated with this device action.
const ToolChain *OffloadingToolChain = nullptr;
Action(ActionClass Kind, types::ID Type) : Action(Kind, ActionList(), Type) {}
Action(ActionClass Kind, Action *Input, types::ID Type)
: Action(Kind, ActionList({Input}), Type) {}
Action(ActionClass Kind, Action *Input)
: Action(Kind, ActionList({Input}), Input->getType()) {}
Action(ActionClass Kind, const ActionList &Inputs, types::ID Type)
: Kind(Kind), Type(Type), Inputs(Inputs) {}
public:
virtual ~Action();
const char *getClassName() const { return Action::getClassName(getKind()); }
ActionClass getKind() const { return Kind; }
types::ID getType() const { return Type; }
ActionList &getInputs() { return Inputs; }
const ActionList &getInputs() const { return Inputs; }
size_type size() const { return Inputs.size(); }
input_iterator input_begin() { return Inputs.begin(); }
input_iterator input_end() { return Inputs.end(); }
input_range inputs() { return input_range(input_begin(), input_end()); }
input_const_iterator input_begin() const { return Inputs.begin(); }
input_const_iterator input_end() const { return Inputs.end(); }
input_const_range inputs() const {
return input_const_range(input_begin(), input_end());
}
/// Mark this action as not legal to collapse.
void setCannotBeCollapsedWithNextDependentAction() {
CanBeCollapsedWithNextDependentAction = false;
}
/// Return true if this function can be collapsed with others.
bool isCollapsingWithNextDependentActionLegal() const {
return CanBeCollapsedWithNextDependentAction;
}
/// Return a string containing the offload kind of the action.
std::string getOffloadingKindPrefix() const;
/// Return a string that can be used as prefix in order to generate unique
/// files for each offloading kind. By default, no prefix is used for
/// non-device kinds, except if \a CreatePrefixForHost is set.
static std::string
GetOffloadingFileNamePrefix(OffloadKind Kind,
StringRef NormalizedTriple,
bool CreatePrefixForHost = false);
/// Return a string containing a offload kind name.
static StringRef GetOffloadKindName(OffloadKind Kind);
/// Set the device offload info of this action and propagate it to its
/// dependences.
void propagateDeviceOffloadInfo(OffloadKind OKind, const char *OArch,
const ToolChain *OToolChain);
/// Append the host offload info of this action and propagate it to its
/// dependences.
void propagateHostOffloadInfo(unsigned OKinds, const char *OArch);
void setHostOffloadInfo(unsigned OKinds, const char *OArch) {
ActiveOffloadKindMask |= OKinds;
OffloadingArch = OArch;
}
/// Set the offload info of this action to be the same as the provided action,
/// and propagate it to its dependences.
void propagateOffloadInfo(const Action *A);
unsigned getOffloadingHostActiveKinds() const {
return ActiveOffloadKindMask;
}
OffloadKind getOffloadingDeviceKind() const { return OffloadingDeviceKind; }
const char *getOffloadingArch() const { return OffloadingArch; }
const ToolChain *getOffloadingToolChain() const {
return OffloadingToolChain;
}
/// Check if this action have any offload kinds. Note that host offload kinds
/// are only set if the action is a dependence to a host offload action.
bool isHostOffloading(unsigned int OKind) const {
return ActiveOffloadKindMask & OKind;
}
bool isDeviceOffloading(OffloadKind OKind) const {
return OffloadingDeviceKind == OKind;
}
bool isOffloading(OffloadKind OKind) const {
return isHostOffloading(OKind) || isDeviceOffloading(OKind);
}
};
class InputAction : public Action {
const llvm::opt::Arg &Input;
std::string Id;
virtual void anchor();
public:
InputAction(const llvm::opt::Arg &Input, types::ID Type,
StringRef Id = StringRef());
const llvm::opt::Arg &getInputArg() const { return Input; }
void setId(StringRef _Id) { Id = _Id.str(); }
StringRef getId() const { return Id; }
static bool classof(const Action *A) {
return A->getKind() == InputClass;
}
};
class BindArchAction : public Action {
virtual void anchor();
/// The architecture to bind, or 0 if the default architecture
/// should be bound.
StringRef ArchName;
public:
BindArchAction(Action *Input, StringRef ArchName);
StringRef getArchName() const { return ArchName; }
static bool classof(const Action *A) {
return A->getKind() == BindArchClass;
}
};
/// An offload action combines host or/and device actions according to the
/// programming model implementation needs and propagates the offloading kind to
/// its dependences.
class OffloadAction final : public Action {
virtual void anchor();
public:
/// Type used to communicate device actions. It associates bound architecture,
/// toolchain, and offload kind to each action.
class DeviceDependences final {
public:
using ToolChainList = SmallVector<const ToolChain *, 3>;
using BoundArchList = SmallVector<const char *, 3>;
using OffloadKindList = SmallVector<OffloadKind, 3>;
private:
// Lists that keep the information for each dependency. All the lists are
// meant to be updated in sync. We are adopting separate lists instead of a
// list of structs, because that simplifies forwarding the actions list to
// initialize the inputs of the base Action class.
/// The dependence actions.
ActionList DeviceActions;
/// The offloading toolchains that should be used with the action.
ToolChainList DeviceToolChains;
/// The architectures that should be used with this action.
BoundArchList DeviceBoundArchs;
/// The offload kind of each dependence.
OffloadKindList DeviceOffloadKinds;
public:
/// Add an action along with the associated toolchain, bound arch, and
/// offload kind.
void add(Action &A, const ToolChain &TC, const char *BoundArch,
OffloadKind OKind);
/// Add an action along with the associated toolchain, bound arch, and
/// offload kinds.
void add(Action &A, const ToolChain &TC, const char *BoundArch,
unsigned OffloadKindMask);
/// Get each of the individual arrays.
const ActionList &getActions() const { return DeviceActions; }
const ToolChainList &getToolChains() const { return DeviceToolChains; }
const BoundArchList &getBoundArchs() const { return DeviceBoundArchs; }
const OffloadKindList &getOffloadKinds() const {
return DeviceOffloadKinds;
}
};
/// Type used to communicate host actions. It associates bound architecture,
/// toolchain, and offload kinds to the host action.
class HostDependence final {
/// The dependence action.
Action &HostAction;
/// The offloading toolchain that should be used with the action.
const ToolChain &HostToolChain;
/// The architectures that should be used with this action.
const char *HostBoundArch = nullptr;
/// The offload kind of each dependence.
unsigned HostOffloadKinds = 0u;
public:
HostDependence(Action &A, const ToolChain &TC, const char *BoundArch,
const unsigned OffloadKinds)
: HostAction(A), HostToolChain(TC), HostBoundArch(BoundArch),
HostOffloadKinds(OffloadKinds) {}
/// Constructor version that obtains the offload kinds from the device
/// dependencies.
HostDependence(Action &A, const ToolChain &TC, const char *BoundArch,
const DeviceDependences &DDeps);
Action *getAction() const { return &HostAction; }
const ToolChain *getToolChain() const { return &HostToolChain; }
const char *getBoundArch() const { return HostBoundArch; }
unsigned getOffloadKinds() const { return HostOffloadKinds; }
};
using OffloadActionWorkTy =
llvm::function_ref<void(Action *, const ToolChain *, const char *)>;
private:
/// The host offloading toolchain that should be used with the action.
const ToolChain *HostTC = nullptr;
/// The tool chains associated with the list of actions.
DeviceDependences::ToolChainList DevToolChains;
public:
OffloadAction(const HostDependence &HDep);
OffloadAction(const DeviceDependences &DDeps, types::ID Ty);
OffloadAction(const HostDependence &HDep, const DeviceDependences &DDeps);
/// Execute the work specified in \a Work on the host dependence.
void doOnHostDependence(const OffloadActionWorkTy &Work) const;
/// Execute the work specified in \a Work on each device dependence.
void doOnEachDeviceDependence(const OffloadActionWorkTy &Work) const;
/// Execute the work specified in \a Work on each dependence.
void doOnEachDependence(const OffloadActionWorkTy &Work) const;
/// Execute the work specified in \a Work on each host or device dependence if
/// \a IsHostDependenceto is true or false, respectively.
void doOnEachDependence(bool IsHostDependence,
const OffloadActionWorkTy &Work) const;
/// Return true if the action has a host dependence.
bool hasHostDependence() const;
/// Return the host dependence of this action. This function is only expected
/// to be called if the host dependence exists.
Action *getHostDependence() const;
/// Return true if the action has a single device dependence. If \a
/// DoNotConsiderHostActions is set, ignore the host dependence, if any, while
/// accounting for the number of dependences.
bool hasSingleDeviceDependence(bool DoNotConsiderHostActions = false) const;
/// Return the single device dependence of this action. This function is only
/// expected to be called if a single device dependence exists. If \a
/// DoNotConsiderHostActions is set, a host dependence is allowed.
Action *
getSingleDeviceDependence(bool DoNotConsiderHostActions = false) const;
static bool classof(const Action *A) { return A->getKind() == OffloadClass; }
};
class JobAction : public Action {
virtual void anchor();
protected:
JobAction(ActionClass Kind, Action *Input, types::ID Type);
JobAction(ActionClass Kind, const ActionList &Inputs, types::ID Type);
public:
static bool classof(const Action *A) {
return (A->getKind() >= JobClassFirst &&
A->getKind() <= JobClassLast);
}
};
class PreprocessJobAction : public JobAction {
void anchor() override;
public:
PreprocessJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == PreprocessJobClass;
}
};
class PrecompileJobAction : public JobAction {
void anchor() override;
protected:
PrecompileJobAction(ActionClass Kind, Action *Input, types::ID OutputType);
public:
PrecompileJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == PrecompileJobClass;
}
};
class ExtractAPIJobAction : public JobAction {
void anchor() override;
public:
ExtractAPIJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == ExtractAPIJobClass;
}
void addHeaderInput(Action *Input) { getInputs().push_back(Input); }
};
class AnalyzeJobAction : public JobAction {
void anchor() override;
public:
AnalyzeJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == AnalyzeJobClass;
}
};
class MigrateJobAction : public JobAction {
void anchor() override;
public:
MigrateJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == MigrateJobClass;
}
};
class CompileJobAction : public JobAction {
void anchor() override;
public:
CompileJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == CompileJobClass;
}
};
class BackendJobAction : public JobAction {
void anchor() override;
public:
BackendJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == BackendJobClass;
}
};
class AssembleJobAction : public JobAction {
void anchor() override;
public:
AssembleJobAction(Action *Input, types::ID OutputType);
static bool classof(const Action *A) {
return A->getKind() == AssembleJobClass;
}
};
class IfsMergeJobAction : public JobAction {
void anchor() override;
public:
IfsMergeJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == IfsMergeJobClass;
}
};
class LinkJobAction : public JobAction {
void anchor() override;
public:
LinkJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == LinkJobClass;
}
};
class LipoJobAction : public JobAction {
void anchor() override;
public:
LipoJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == LipoJobClass;
}
};
class DsymutilJobAction : public JobAction {
void anchor() override;
public:
DsymutilJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == DsymutilJobClass;
}
};
class VerifyJobAction : public JobAction {
void anchor() override;
public:
VerifyJobAction(ActionClass Kind, Action *Input, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == VerifyDebugInfoJobClass ||
A->getKind() == VerifyPCHJobClass;
}
};
class VerifyDebugInfoJobAction : public VerifyJobAction {
void anchor() override;
public:
VerifyDebugInfoJobAction(Action *Input, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == VerifyDebugInfoJobClass;
}
};
class VerifyPCHJobAction : public VerifyJobAction {
void anchor() override;
public:
VerifyPCHJobAction(Action *Input, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == VerifyPCHJobClass;
}
};
class OffloadBundlingJobAction : public JobAction {
void anchor() override;
public:
// Offloading bundling doesn't change the type of output.
OffloadBundlingJobAction(ActionList &Inputs);
static bool classof(const Action *A) {
return A->getKind() == OffloadBundlingJobClass;
}
};
class OffloadUnbundlingJobAction final : public JobAction {
void anchor() override;
public:
/// Type that provides information about the actions that depend on this
/// unbundling action.
struct DependentActionInfo final {
/// The tool chain of the dependent action.
const ToolChain *DependentToolChain = nullptr;
/// The bound architecture of the dependent action.
StringRef DependentBoundArch;
/// The offload kind of the dependent action.
const OffloadKind DependentOffloadKind = OFK_None;
DependentActionInfo(const ToolChain *DependentToolChain,
StringRef DependentBoundArch,
const OffloadKind DependentOffloadKind)
: DependentToolChain(DependentToolChain),
DependentBoundArch(DependentBoundArch),
DependentOffloadKind(DependentOffloadKind) {}
};
private:
/// Container that keeps information about each dependence of this unbundling
/// action.
SmallVector<DependentActionInfo, 6> DependentActionInfoArray;
public:
// Offloading unbundling doesn't change the type of output.
OffloadUnbundlingJobAction(Action *Input);
/// Register information about a dependent action.
void registerDependentActionInfo(const ToolChain *TC, StringRef BoundArch,
OffloadKind Kind) {
DependentActionInfoArray.push_back({TC, BoundArch, Kind});
}
/// Return the information about all depending actions.
ArrayRef<DependentActionInfo> getDependentActionsInfo() const {
return DependentActionInfoArray;
}
static bool classof(const Action *A) {
return A->getKind() == OffloadUnbundlingJobClass;
}
};
class OffloadPackagerJobAction : public JobAction {
void anchor() override;
public:
OffloadPackagerJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == OffloadPackagerJobClass;
}
};
class LinkerWrapperJobAction : public JobAction {
void anchor() override;
public:
LinkerWrapperJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == LinkerWrapperJobClass;
}
};
class StaticLibJobAction : public JobAction {
void anchor() override;
public:
StaticLibJobAction(ActionList &Inputs, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == StaticLibJobClass;
}
};
class BinaryAnalyzeJobAction : public JobAction {
void anchor() override;
public:
BinaryAnalyzeJobAction(Action *Input, types::ID Type);
static bool classof(const Action *A) {
return A->getKind() == BinaryAnalyzeJobClass;
}
};
} // namespace driver
} // namespace clang
#endif // LLVM_CLANG_DRIVER_ACTION_H
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