llvm::TargetLowering::getNegatedExpression

Synopses

Declared in <llvm/CodeGen/TargetLowering.h>

This is the helper function to return the newly negated expression if the cost is not expensive.

SDValue
getNegatedExpression(
    SDValue Op,
    SelectionDAG& DAG,
    bool LegalOps,
    bool OptForSize,
    unsigned int Depth = 0) const;

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Return the newly negated expression if the cost is not expensive and set the cost in Cost to indicate that if it is cheaper or neutral to do the negation.

virtual
SDValue
getNegatedExpression(
    SDValue Op,
    SelectionDAG& DAG,
    bool LegalOps,
    bool OptForSize,
    NegatibleCost& Cost,
    unsigned int Depth = 0) const;

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Return Value

The lowered or expanded SelectionDAG value, or an empty SDValue on failure.
The newly negated expression if the cost is not expensive and set the cost in Cost to indicate that if it is cheaper or neutral to do the negation.

Parameters

Name	Description
Op	SDNode or value being queried.
DAG	SelectionDAG providing context.
LegalOps	Restrict results to legal operations.
OptForSize	Optimize the negation for size.
Depth	Recursion depth limit for the analysis.
Cost	Maximum acceptable negation cost.