llvm::DAGTypeLegalizer Class Reference

This takes an arbitrary SelectionDAG as input and hacks on it until only value types the target machine can handle are left. More...

#include "CodeGen/SelectionDAG/LegalizeTypes.h"

Public Types
enum	NodeIdFlags { ReadyToProcess = 0 , NewNode = -1 , Unanalyzed = -2 , Processed = -3 }
	This pass uses the NodeId on the SDNodes to hold information about the state of the node. More...

Public Member Functions
	DAGTypeLegalizer (SelectionDAG &dag)
bool	run ()
	This is the main entry point for the type legalizer.
void	NoteDeletion (SDNode *Old, SDNode *New)
SelectionDAG &	getDAG () const

Detailed Description

This takes an arbitrary SelectionDAG as input and hacks on it until only value types the target machine can handle are left.

This involves promoting small sizes to large sizes or splitting up large values into small values.

Definition at line 31 of file LegalizeTypes.h.

Member Enumeration Documentation

NodeIdFlags

enum llvm::DAGTypeLegalizer::NodeIdFlags

This pass uses the NodeId on the SDNodes to hold information about the state of the node.

The enum has all the values.

Enumerator
ReadyToProcess	All operands have been processed, so this node is ready to be handled.
NewNode	This is a new node, not before seen, that was created in the process of legalizing some other node.
Unanalyzed	This node's ID needs to be set to the number of its unprocessed operands.
Processed	This is a node that has already been processed.

Definition at line 37 of file LegalizeTypes.h.

Constructor & Destructor Documentation

DAGTypeLegalizer()

llvm::DAGTypeLegalizer::DAGTypeLegalizer ( SelectionDAG &  dag )

inlineexplicit

Definition at line 168 of file LegalizeTypes.h.

Member Function Documentation

getDAG()

SelectionDAG & llvm::DAGTypeLegalizer::getDAG ( ) const

inline

Definition at line 206 of file LegalizeTypes.h.

NoteDeletion()

void llvm::DAGTypeLegalizer::NoteDeletion ( SDNode *  Old, SDNode *  New  )

inline

Definition at line 178 of file LegalizeTypes.h.

References assert(), and llvm::SDNode::getNumValues().

run()

bool DAGTypeLegalizer::run

(

)

This is the main entry point for the type legalizer.

This does a top-down traversal of the dag, legalizing types as it goes. Returns "true" if it made any changes.

Definition at line 200 of file LegalizeTypes.cpp.

References llvm::SelectionDAG::allnodes(), assert(), llvm::dbgs(), EnableExpensiveChecks, llvm::Failed(), llvm::User::getNumOperands(), llvm::SelectionDAG::getRoot(), LLVM_DEBUG, llvm_unreachable, N, NewNode, Processed, ReadyToProcess, llvm::SelectionDAG::RemoveDeadNodes(), llvm::report_fatal_error(), llvm::SelectionDAG::setRoot(), llvm::TargetLoweringBase::TypeExpandFloat, llvm::TargetLoweringBase::TypeExpandInteger, llvm::TargetLoweringBase::TypeLegal, llvm::TargetLoweringBase::TypePromoteFloat, llvm::TargetLoweringBase::TypePromoteInteger, llvm::TargetLoweringBase::TypeScalarizeScalableVector, llvm::TargetLoweringBase::TypeScalarizeVector, llvm::TargetLoweringBase::TypeSoftenFloat, llvm::TargetLoweringBase::TypeSoftPromoteHalf, llvm::TargetLoweringBase::TypeSplitVector, llvm::TargetLoweringBase::TypeWidenVector, and Unanalyzed.

Referenced by llvm::SelectionDAG::LegalizeTypes().

---

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

• lib/CodeGen/SelectionDAG/LegalizeTypes.h
• lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
• lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
• lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
• lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp
• lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp