CIRCT  19.0.0git
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ConnectSourceOperandForwarder< OpNum > Struct Template Reference

A sample reduction pattern that replaces a single-use wire and register with an operand of the source value of the connection. More...

Inheritance diagram for ConnectSourceOperandForwarder< OpNum >:
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Public Member Functions

uint64_t match (Operation *op) override
 Check if the reduction can apply to a specific operation. More...
 
LogicalResult rewrite (Operation *op) override
 Apply the reduction to a specific operation. More...
 
std::string getName () const override
 Return a human-readable name for this reduction pattern. More...
 
- Public Member Functions inherited from circt::Reduction
virtual ~Reduction ()
 
virtual void beforeReduction (mlir::ModuleOp)
 Called before the reduction is applied to a new subset of operations. More...
 
virtual void afterReduction (mlir::ModuleOp)
 Called after the reduction has been applied to a subset of operations. More...
 
virtual bool acceptSizeIncrease () const
 Return true if the tool should accept the transformation this reduction performs on the module even if the overall size of the output increases. More...
 
virtual bool isOneShot () const
 Return true if the tool should not try to reapply this reduction after it has been successful. More...
 
void notifyOpErased (Operation *op)
 

Additional Inherited Members

- Public Attributes inherited from circt::Reduction
std::function< void(Operation *)> notifyOpErasedCallback = nullptr
 An optional callback for reductions to communicate removal of operations. More...
 

Detailed Description

template<unsigned OpNum>
struct ConnectSourceOperandForwarder< OpNum >

A sample reduction pattern that replaces a single-use wire and register with an operand of the source value of the connection.

Definition at line 753 of file FIRRTLReductions.cpp.

Member Function Documentation

◆ getName()

template<unsigned OpNum>
std::string ConnectSourceOperandForwarder< OpNum >::getName ( ) const
inlineoverridevirtual

Return a human-readable name for this reduction pattern.

Implements circt::Reduction.

Definition at line 817 of file FIRRTLReductions.cpp.

◆ match()

template<unsigned OpNum>
uint64_t ConnectSourceOperandForwarder< OpNum >::match ( Operation *  op)
inlineoverridevirtual

Check if the reduction can apply to a specific operation.

Returns a benefit measure where a higher number means that applying the pattern leads to a bigger reduction and zero means that the patten does not match and thus cannot be applied at all.

Implements circt::Reduction.

Definition at line 754 of file FIRRTLReductions.cpp.

References circt::firrtl::FIRRTLBaseType::getBitWidthOrSentinel(), and circt::firrtl::FIRRTLBaseType::getWidthlessType().

◆ rewrite()

template<unsigned OpNum>
LogicalResult ConnectSourceOperandForwarder< OpNum >::rewrite ( Operation *  op)
inlineoverridevirtual

Apply the reduction to a specific operation.

If the returned result indicates that the application failed, the resulting module is treated the same as if the tester marked it as uninteresting.

Implements circt::Reduction.

Definition at line 780 of file FIRRTLReductions.cpp.

References builder, and circt::reduce::pruneUnusedOps().


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