llvm-6502/lib/IR/PassRegistry.cpp
Chandler Carruth ef68758aa8 [PM] Remove an unused and rather expensive mapping from an analysis
group's interface to all of the implementations of that analysis group.
The groups themselves can and do manage this anyways, the pass registry
needn't involve itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219097 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-06 00:30:59 +00:00

131 lines
4.6 KiB
C++

//===- PassRegistry.cpp - Pass Registration Implementation ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the PassRegistry, with which passes are registered on
// initialization, and supports the PassManager in dependency resolution.
//
//===----------------------------------------------------------------------===//
#include "llvm/PassRegistry.h"
#include "llvm/IR/Function.h"
#include "llvm/PassSupport.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/RWMutex.h"
#include <vector>
using namespace llvm;
// FIXME: We use ManagedStatic to erase the pass registrar on shutdown.
// Unfortunately, passes are registered with static ctors, and having
// llvm_shutdown clear this map prevents successful resurrection after
// llvm_shutdown is run. Ideally we should find a solution so that we don't
// leak the map, AND can still resurrect after shutdown.
static ManagedStatic<PassRegistry> PassRegistryObj;
PassRegistry *PassRegistry::getPassRegistry() {
return &*PassRegistryObj;
}
//===----------------------------------------------------------------------===//
// Accessors
//
PassRegistry::~PassRegistry() {}
const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
sys::SmartScopedReader<true> Guard(Lock);
MapType::const_iterator I = PassInfoMap.find(TI);
return I != PassInfoMap.end() ? I->second : nullptr;
}
const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
sys::SmartScopedReader<true> Guard(Lock);
StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
return I != PassInfoStringMap.end() ? I->second : nullptr;
}
//===----------------------------------------------------------------------===//
// Pass Registration mechanism
//
void PassRegistry::registerPass(const PassInfo &PI, bool ShouldFree) {
sys::SmartScopedWriter<true> Guard(Lock);
bool Inserted =
PassInfoMap.insert(std::make_pair(PI.getTypeInfo(), &PI)).second;
assert(Inserted && "Pass registered multiple times!");
(void)Inserted;
PassInfoStringMap[PI.getPassArgument()] = &PI;
// Notify any listeners.
for (auto *Listener : Listeners)
Listener->passRegistered(&PI);
if (ShouldFree)
ToFree.push_back(std::unique_ptr<const PassInfo>(&PI));
}
void PassRegistry::enumerateWith(PassRegistrationListener *L) {
sys::SmartScopedReader<true> Guard(Lock);
for (auto PassInfoPair : PassInfoMap)
L->passEnumerate(PassInfoPair.second);
}
/// Analysis Group Mechanisms.
void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
const void *PassID,
PassInfo &Registeree, bool isDefault,
bool ShouldFree) {
PassInfo *InterfaceInfo = const_cast<PassInfo *>(getPassInfo(InterfaceID));
if (!InterfaceInfo) {
// First reference to Interface, register it now.
registerPass(Registeree);
InterfaceInfo = &Registeree;
}
assert(Registeree.isAnalysisGroup() &&
"Trying to join an analysis group that is a normal pass!");
if (PassID) {
PassInfo *ImplementationInfo = const_cast<PassInfo *>(getPassInfo(PassID));
assert(ImplementationInfo &&
"Must register pass before adding to AnalysisGroup!");
sys::SmartScopedWriter<true> Guard(Lock);
// Make sure we keep track of the fact that the implementation implements
// the interface.
ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
if (isDefault) {
assert(InterfaceInfo->getNormalCtor() == nullptr &&
"Default implementation for analysis group already specified!");
assert(
ImplementationInfo->getNormalCtor() &&
"Cannot specify pass as default if it does not have a default ctor");
InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
InterfaceInfo->setTargetMachineCtor(
ImplementationInfo->getTargetMachineCtor());
}
}
if (ShouldFree)
ToFree.push_back(std::unique_ptr<const PassInfo>(&Registeree));
}
void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
sys::SmartScopedWriter<true> Guard(Lock);
Listeners.push_back(L);
}
void PassRegistry::removeRegistrationListener(PassRegistrationListener *L) {
sys::SmartScopedWriter<true> Guard(Lock);
auto I = std::find(Listeners.begin(), Listeners.end(), L);
Listeners.erase(I);
}