//===- llvm/PassSupport.h - Pass Support code -------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines stuff that is used to define and "use" Passes. This file
// is automatically #included by Pass.h, so:
//
// NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY
//
// Instead, #include Pass.h.
//
// This file defines Pass registration code and classes used for it.
//
//===----------------------------------------------------------------------===//
#if !defined(LLVM_PASS_H) || defined(LLVM_PASSSUPPORT_H)
#error "Do not include <PassSupport.h>; include <Pass.h> instead"
#endif
#ifndef LLVM_PASSSUPPORT_H
#define LLVM_PASSSUPPORT_H
#include "llvm/ADT/StringRef.h"
#include "llvm/PassInfo.h"
#include "llvm/PassRegistry.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/Threading.h"
#include <functional>
namespace llvm {
class Pass;
#define INITIALIZE_PASS(passName, arg, name, cfg, analysis) \
static void *initialize##passName##PassOnce(PassRegistry &Registry) { \
PassInfo *PI = new PassInfo( \
name, arg, &passName::ID, \
PassInfo::NormalCtor_t(callDefaultCtor<passName>), cfg, analysis); \
Registry.registerPass(*PI, true); \
return PI; \
} \
static llvm::once_flag Initialize##passName##PassFlag; \
void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
llvm::call_once(Initialize##passName##PassFlag, \
initialize##passName##PassOnce, std::ref(Registry)); \
}
#define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis) \
static void *initialize##passName##PassOnce(PassRegistry &Registry) {
#define INITIALIZE_PASS_DEPENDENCY(depName) initialize##depName##Pass(Registry);
#define INITIALIZE_AG_DEPENDENCY(depName) \
initialize##depName##AnalysisGroup(Registry);
#define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis) \
PassInfo *PI = new PassInfo( \
name, arg, &passName::ID, \
PassInfo::NormalCtor_t(callDefaultCtor<passName>), cfg, analysis); \
Registry.registerPass(*PI, true); \
return PI; \
} \
static llvm::once_flag Initialize##passName##PassFlag; \
void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
llvm::call_once(Initialize##passName##PassFlag, \
initialize##passName##PassOnce, std::ref(Registry)); \
}
#define INITIALIZE_PASS_WITH_OPTIONS(PassName, Arg, Name, Cfg, Analysis) \
INITIALIZE_PASS_BEGIN(PassName, Arg, Name, Cfg, Analysis) \
PassName::registerOptions(); \
INITIALIZE_PASS_END(PassName, Arg, Name, Cfg, Analysis)
#define INITIALIZE_PASS_WITH_OPTIONS_BEGIN(PassName, Arg, Name, Cfg, Analysis) \
INITIALIZE_PASS_BEGIN(PassName, Arg, Name, Cfg, Analysis) \
PassName::registerOptions();
template <
class PassName,
std::enable_if_t<std::is_default_constructible<PassName>{}, bool> = true>
Pass *callDefaultCtor() {
return new PassName();
}
template <
class PassName,
std::enable_if_t<!std::is_default_constructible<PassName>{}, bool> = true>
Pass *callDefaultCtor() {
// Some codegen passes should only be testable via
// `llc -{start|stop}-{before|after}=<passname>`, not via `opt -<passname>`.
report_fatal_error("target-specific codegen-only pass");
}
//===---------------------------------------------------------------------------
/// RegisterPass<t> template - This template class is used to notify the system
/// that a Pass is available for use, and registers it into the internal
/// database maintained by the PassManager. Unless this template is used, opt,
/// for example will not be able to see the pass and attempts to create the pass
/// will fail. This template is used in the follow manner (at global scope, in
/// your .cpp file):
///
/// static RegisterPass<YourPassClassName> tmp("passopt", "My Pass Name");
///
/// This statement will cause your pass to be created by calling the default
/// constructor exposed by the pass.
template <typename passName> struct RegisterPass : public PassInfo {
// Register Pass using default constructor...
RegisterPass(StringRef PassArg, StringRef Name, bool CFGOnly = false,
bool is_analysis = false)
: PassInfo(Name, PassArg, &passName::ID,
PassInfo::NormalCtor_t(callDefaultCtor<passName>), CFGOnly,
is_analysis) {
PassRegistry::getPassRegistry()->registerPass(*this);
}
};
/// RegisterAnalysisGroup - Register a Pass as a member of an analysis _group_.
/// Analysis groups are used to define an interface (which need not derive from
/// Pass) that is required by passes to do their job. Analysis Groups differ
/// from normal analyses because any available implementation of the group will
/// be used if it is available.
///
/// If no analysis implementing the interface is available, a default
/// implementation is created and added. A pass registers itself as the default
/// implementation by specifying 'true' as the second template argument of this
/// class.
///
/// In addition to registering itself as an analysis group member, a pass must
/// register itself normally as well. Passes may be members of multiple groups
/// and may still be "required" specifically by name.
///
/// The actual interface may also be registered as well (by not specifying the
/// second template argument). The interface should be registered to associate
/// a nice name with the interface.
class RegisterAGBase : public PassInfo {
public:
RegisterAGBase(StringRef Name, const void *InterfaceID,
const void *PassID = nullptr, bool isDefault = false);
};
template <typename Interface, bool Default = false>
struct RegisterAnalysisGroup : public RegisterAGBase {
explicit RegisterAnalysisGroup(PassInfo &RPB)
: RegisterAGBase(RPB.getPassName(), &Interface::ID, RPB.getTypeInfo(),
Default) {}
explicit RegisterAnalysisGroup(const char *Name)
: RegisterAGBase(Name, &Interface::ID) {}
};
#define INITIALIZE_ANALYSIS_GROUP(agName, name, defaultPass) \
static void *initialize##agName##AnalysisGroupOnce(PassRegistry &Registry) { \
initialize##defaultPass##Pass(Registry); \
PassInfo *AI = new PassInfo(name, &agName::ID); \
Registry.registerAnalysisGroup(&agName::ID, 0, *AI, false, true); \
return AI; \
} \
static llvm::once_flag Initialize##agName##AnalysisGroupFlag; \
void llvm::initialize##agName##AnalysisGroup(PassRegistry &Registry) { \
llvm::call_once(Initialize##agName##AnalysisGroupFlag, \
initialize##agName##AnalysisGroupOnce, \
std::ref(Registry)); \
}
#define INITIALIZE_AG_PASS(passName, agName, arg, name, cfg, analysis, def) \
static void *initialize##passName##PassOnce(PassRegistry &Registry) { \
if (!def) \
initialize##agName##AnalysisGroup(Registry); \
PassInfo *PI = new PassInfo( \
name, arg, &passName::ID, \
PassInfo::NormalCtor_t(callDefaultCtor<passName>), cfg, analysis); \
Registry.registerPass(*PI, true); \
\
PassInfo *AI = new PassInfo(name, &agName::ID); \
Registry.registerAnalysisGroup(&agName::ID, &passName::ID, *AI, def, \
true); \
return AI; \
} \
static llvm::once_flag Initialize##passName##PassFlag; \
void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
llvm::call_once(Initialize##passName##PassFlag, \
initialize##passName##PassOnce, std::ref(Registry)); \
}
#define INITIALIZE_AG_PASS_BEGIN(passName, agName, arg, n, cfg, analysis, def) \
static void *initialize##passName##PassOnce(PassRegistry &Registry) { \
if (!def) \
initialize##agName##AnalysisGroup(Registry);
#define INITIALIZE_AG_PASS_END(passName, agName, arg, n, cfg, analysis, def) \
PassInfo *PI = new PassInfo( \
n, arg, &passName::ID, \
PassInfo::NormalCtor_t(callDefaultCtor<passName>), cfg, analysis); \
Registry.registerPass(*PI, true); \
\
PassInfo *AI = new PassInfo(n, &agName::ID); \
Registry.registerAnalysisGroup(&agName::ID, &passName::ID, *AI, def, true); \
return AI; \
} \
static llvm::once_flag Initialize##passName##PassFlag; \
void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
llvm::call_once(Initialize##passName##PassFlag, \
initialize##passName##PassOnce, std::ref(Registry)); \
}
//===---------------------------------------------------------------------------
/// PassRegistrationListener class - This class is meant to be derived from by
/// clients that are interested in which passes get registered and unregistered
/// at runtime (which can be because of the RegisterPass constructors being run
/// as the program starts up, or may be because a shared object just got
/// loaded).
struct PassRegistrationListener {
PassRegistrationListener() = default;
virtual ~PassRegistrationListener() = default;
/// Callback functions - These functions are invoked whenever a pass is loaded
/// or removed from the current executable.
virtual void passRegistered(const PassInfo *) {}
/// enumeratePasses - Iterate over the registered passes, calling the
/// passEnumerate callback on each PassInfo object.
void enumeratePasses();
/// passEnumerate - Callback function invoked when someone calls
/// enumeratePasses on this PassRegistrationListener object.
virtual void passEnumerate(const PassInfo *) {}
};
} // end namespace llvm
#endif // LLVM_PASSSUPPORT_H