LLVM 17.0.0git
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)

SelectionDAGgetDAG () 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 30 of file LegalizeTypes.h.

## ◆ 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

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 36 of file LegalizeTypes.h.

## ◆ DAGTypeLegalizer()

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

Definition at line 167 of file LegalizeTypes.h.

References llvm::MVT::LAST_VALUETYPE, and llvm::MVT::MAX_ALLOWED_VALUETYPE.

## ◆ getDAG()

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

Definition at line 207 of file LegalizeTypes.h.

## ◆ NoteDeletion()

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

Definition at line 179 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 202 of file LegalizeTypes.cpp.

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

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