llvm::RegionNode Class Reference

A RegionNode represents a subregion or a BasicBlock that is part of a Region. More...

#include <RegionInfo.h>

Inheritance diagram for llvm::RegionNode:

Collaboration diagram for llvm::RegionNode:

Public Member Functions
	RegionNode (Region *Parent, BasicBlock *Entry, bool isSubRegion=0)
	Create a RegionNode. More...
Region *	getParent () const
	Get the parent Region of this RegionNode. More...
BasicBlock *	getEntry () const
	Get the entry BasicBlock of this RegionNode. More...
template<class T >
T *	getNodeAs () const
	Get the content of this RegionNode. More...
bool	isSubRegion () const
	Is this RegionNode a subregion? More...
template<>
BasicBlock *	getNodeAs () const
template<>
Region *	getNodeAs () const

Protected Attributes
PointerIntPair< BasicBlock *, 1, bool >	entry
Region *	parent
	The parent Region of this RegionNode. More...

Detailed Description

A RegionNode represents a subregion or a BasicBlock that is part of a Region.

Definition at line 56 of file RegionInfo.h.

Constructor & Destructor Documentation

llvm::RegionNode::RegionNode ( Region *  Parent, BasicBlock *  Entry, bool  isSubRegion = 0  )

inline

Create a RegionNode.

Parameters

Parent	The parent of this RegionNode.
Entry	The entry BasicBlock of the RegionNode. If this RegionNode represents a BasicBlock, this is the BasicBlock itself. If it represents a subregion, this is the entry BasicBlock of the subregion.
isSubRegion	If this RegionNode represents a SubRegion.

Definition at line 86 of file RegionInfo.h.

Member Function Documentation

BasicBlock* llvm::RegionNode::getEntry ( ) const

inline

Get the entry BasicBlock of this RegionNode.

If this RegionNode represents a BasicBlock this is just the BasicBlock itself, otherwise we return the entry BasicBlock of the Subregion

Returns

The entry BasicBlock of this RegionNode.

Definition at line 105 of file RegionInfo.h.

References entry, and llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits >::getPointer().

Referenced by llvm::Region::getEntry().

template<class T >

T* llvm::RegionNode::getNodeAs ( ) const

inline

Get the content of this RegionNode.

This can be either a BasicBlock or a subregion. Before calling getNodeAs() check the type of the content with the isSubRegion() function call.

Returns

The content of this RegionNode.

Referenced by buildExtractionBlockSet(), llvm::DOTGraphTraits< RegionInfo * >::getEdgeAttributes(), llvm::DOTGraphTraits< RegionNode * >::getNodeLabel(), and llvm::operator<<().

template<>

BasicBlock* llvm::RegionNode::getNodeAs ( ) const

inline

Definition at line 129 of file RegionInfo.h.

template<>

Region* llvm::RegionNode::getNodeAs ( ) const

inline

Definition at line 135 of file RegionInfo.h.

Region* llvm::RegionNode::getParent ( ) const

inline

Get the parent Region of this RegionNode.

The parent Region is the Region this RegionNode belongs to. If for example a BasicBlock is element of two Regions, there exist two RegionNodes for this BasicBlock. Each with the getParent() function pointing to the Region this RegionNode belongs to.

Returns

Get the parent Region of this RegionNode.

Definition at line 97 of file RegionInfo.h.

References parent.

Referenced by llvm::Region::getParent().

bool llvm::RegionNode::isSubRegion ( ) const

inline

Is this RegionNode a subregion?

Returns

True if it contains a subregion. False if it contains a BasicBlock.

Definition at line 120 of file RegionInfo.h.

References entry, and llvm::PointerIntPair< PointerTy, IntBits, IntType, PtrTraits >::getInt().

Referenced by buildExtractionBlockSet(), llvm::DOTGraphTraits< RegionInfo * >::getEdgeAttributes(), llvm::DOTGraphTraits< RegionNode * >::getNodeLabel(), and llvm::operator<<().

Member Data Documentation

PointerIntPair<BasicBlock*, 1, bool> llvm::RegionNode::entry

protected

This is the entry basic block that starts this region node. If this is a BasicBlock RegionNode, then entry is just the basic block, that this RegionNode represents. Otherwise it is the entry of this (Sub)RegionNode.

In the BBtoRegionNode map of the parent of this node, BB will always map to this node no matter which kind of node this one is.

The node can hold either a Region or a BasicBlock. Use one bit to save, if this RegionNode is a subregion or BasicBlock RegionNode.

Definition at line 71 of file RegionInfo.h.

Referenced by llvm::Region::contains(), llvm::Region::getEnteringBlock(), getEntry(), isSubRegion(), and llvm::Region::replaceEntry().

Region* llvm::RegionNode::parent

protected

The parent Region of this RegionNode.

See Also

getParent()

Definition at line 75 of file RegionInfo.h.

Referenced by llvm::Region::addSubRegion(), llvm::Region::getDepth(), getParent(), and llvm::Region::removeSubRegion().

---

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

• RegionInfo.h