llvm::CallGraphUpdater Class Reference

Wrapper to unify "old style" CallGraph and "new style" LazyCallGraph. More...

#include "llvm/Transforms/Utils/CallGraphUpdater.h"

Public Member Functions
	CallGraphUpdater ()=default
	}
	~CallGraphUpdater ()
void	initialize (CallGraph &CG, CallGraphSCC &SCC)
	Initializers for usage outside of a CGSCC pass, inside a CGSCC pass in the old and new pass manager (PM).
void	initialize (LazyCallGraph &LCG, LazyCallGraph::SCC &SCC, CGSCCAnalysisManager &AM, CGSCCUpdateResult &UR)
bool	finalize ()
	}
void	removeFunction (Function &Fn)
	Remove Fn from the call graph.
void	reanalyzeFunction (Function &Fn)
	After an CGSCC pass changes a function in ways that affect the call graph, this method can be called to update it.
void	registerOutlinedFunction (Function &OriginalFn, Function &NewFn)
	If a new function was created by outlining, this method can be called to update the call graph for the new function.
void	replaceFunctionWith (Function &OldFn, Function &NewFn)
	Replace OldFn in the call graph (and SCC) with NewFn.
void	removeCallSite (CallBase &CS)
	Remove the call site CS from the call graph.
bool	replaceCallSite (CallBase &OldCS, CallBase &NewCS)
	Replace OldCS with the new call site NewCS.

Detailed Description

Wrapper to unify "old style" CallGraph and "new style" LazyCallGraph.

This simplifies the interface and the call sites, e.g., new and old pass manager passes can share the same code.

Definition at line 29 of file CallGraphUpdater.h.

Constructor & Destructor Documentation

CallGraphUpdater()

llvm::CallGraphUpdater::CallGraphUpdater ( )

default

}

~CallGraphUpdater()

llvm::CallGraphUpdater::~CallGraphUpdater ( )

inline

Definition at line 58 of file CallGraphUpdater.h.

References finalize().

Member Function Documentation

finalize()

bool CallGraphUpdater::finalize

(

)

}

Finalizer that will trigger actions like function removal from the CG.

Definition at line 24 of file CallGraphUpdater.cpp.

References assert(), llvm::AnalysisManager< IRUnitT, ExtraArgTs >::clear(), FAM, llvm::filterDeadComdatFunctions(), llvm::LazyCallGraph::get(), llvm::PoisonValue::get(), llvm::CallGraph::getExternalCallingNode(), llvm::CallGraphNode::getNumReferences(), llvm::CallGraph::getOrInsertFunction(), llvm::AnalysisManager< IRUnitT, ExtraArgTs >::getResult(), llvm::CGSCCUpdateResult::InvalidatedRefSCCs, llvm::CGSCCUpdateResult::InvalidatedSCCs, llvm::LazyCallGraph::lookupSCC(), N, llvm::CallGraphNode::removeAllCalledFunctions(), llvm::CallGraphNode::removeAnyCallEdgeTo(), llvm::Constant::removeDeadConstantUsers(), llvm::LazyCallGraph::removeDeadFunction(), and llvm::CallGraph::removeFunctionFromModule().

Referenced by ~CallGraphUpdater().

initialize() [1/2]

void llvm::CallGraphUpdater::initialize ( CallGraph &  CG, CallGraphSCC &  SCC  )

inline

Initializers for usage outside of a CGSCC pass, inside a CGSCC pass in the old and new pass manager (PM).

{

Definition at line 63 of file CallGraphUpdater.h.

Referenced by llvm::AttributorCGSCCPass::run(), llvm::AttributorLightCGSCCPass::run(), and llvm::OpenMPOptCGSCCPass::run().

initialize() [2/2]

void llvm::CallGraphUpdater::initialize ( LazyCallGraph &  LCG, LazyCallGraph::SCC &  SCC, CGSCCAnalysisManager &  AM, CGSCCUpdateResult &  UR  )

inline

Definition at line 67 of file CallGraphUpdater.h.

References FAM, and llvm::AnalysisManager< IRUnitT, ExtraArgTs >::getResult().

reanalyzeFunction()

void CallGraphUpdater::reanalyzeFunction

(

Function &

Fn

)

After an CGSCC pass changes a function in ways that affect the call graph, this method can be called to update it.

Definition at line 89 of file CallGraphUpdater.cpp.

References llvm::CallingConv::C, llvm::LazyCallGraph::get(), llvm::CallGraph::getOrInsertFunction(), llvm::LazyCallGraph::lookupSCC(), N, llvm::CallGraph::populateCallGraphNode(), llvm::CallGraphNode::removeAllCalledFunctions(), and llvm::updateCGAndAnalysisManagerForCGSCCPass().

Referenced by runAttributorOnFunctions().

registerOutlinedFunction()

void CallGraphUpdater::registerOutlinedFunction	(	Function &	OriginalFn,
		Function &	NewFn
	)

If a new function was created by outlining, this method can be called to update the call graph for the new function.

Note that the old one still needs to be re-analyzed or manually updated.

Definition at line 101 of file CallGraphUpdater.cpp.

References llvm::LazyCallGraph::addSplitFunction(), and llvm::CallGraph::addToCallGraph().

removeCallSite()

void CallGraphUpdater::removeCallSite

(

CallBase &

CS

)

Remove the call site CS from the call graph.

Definition at line 164 of file CallGraphUpdater.cpp.

References llvm::CallBase::getCaller(), and llvm::CallGraphNode::removeCallEdgeFor().

Referenced by llvm::Attributor::removeCallSite().

removeFunction()

void CallGraphUpdater::removeFunction

(

Function &

Fn

)

Remove Fn from the call graph.

Definition at line 109 of file CallGraphUpdater.cpp.

References llvm::AnalysisManager< IRUnitT, ExtraArgTs >::clear(), llvm::Function::deleteBody(), llvm::CallGraphSCC::DeleteNode(), llvm::GlobalValue::ExternalLinkage, llvm::Value::getName(), llvm::GlobalObject::hasComdat(), llvm::CallGraphNode::removeAllCalledFunctions(), and llvm::GlobalValue::setLinkage().

Referenced by replaceFunctionWith().

replaceCallSite()

bool CallGraphUpdater::replaceCallSite	(	CallBase &	OldCS,
		CallBase &	NewCS
	)

Replace OldCS with the new call site NewCS.

Returns

True if the replacement was successful, otherwise False. In the latter case the parent function of OldCB needs to be re-analyzed.

Definition at line 147 of file CallGraphUpdater.cpp.

References llvm::CallBase::getCalledFunction(), llvm::CallBase::getCaller(), llvm::CallGraph::getOrInsertFunction(), llvm::none_of(), and llvm::CallGraphNode::replaceCallEdge().

replaceFunctionWith()

void CallGraphUpdater::replaceFunctionWith	(	Function &	OldFn,
		Function &	NewFn
	)

Replace OldFn in the call graph (and SCC) with NewFn.

The uses outside the call graph and the function OldFn are not modified. Note that OldFn is also removed from the call graph (

See also

removeFunction).

Definition at line 127 of file CallGraphUpdater.cpp.

References llvm::LazyCallGraph::get(), llvm::CallGraph::getOrInsertFunction(), llvm::LazyCallGraph::SCC::getOuterRefSCC(), llvm::Constant::removeDeadConstantUsers(), removeFunction(), llvm::CallGraph::ReplaceExternalCallEdge(), llvm::CallGraphSCC::ReplaceNode(), llvm::LazyCallGraph::RefSCC::replaceNodeFunction(), and llvm::CallGraphNode::stealCalledFunctionsFrom().

Referenced by runAttributorOnFunctions().

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The documentation for this class was generated from the following files:

• include/llvm/Transforms/Utils/CallGraphUpdater.h
• lib/Transforms/Utils/CallGraphUpdater.cpp