llvm::VPSCEVExpander Class Reference

Lightweight SCEV-to-VPlan expander. More...

#include "Transforms/Vectorize/VPlanUtils.h"

Public Member Functions
	VPSCEVExpander (VPBuilder &Builder, ScalarEvolution &SE, DebugLoc DL={})
VPValue *	tryToExpand (const SCEV *S)
	Try to expand S into recipes and live-ins using the builder.

Detailed Description

Lightweight SCEV-to-VPlan expander.

Converts SCEV expressions into VPInstructions where possible, and returning nullptr for unsupported expressions (like adds, casts, min/max).

Definition at line 187 of file VPlanUtils.h.

Constructor & Destructor Documentation

VPSCEVExpander()

llvm::VPSCEVExpander::VPSCEVExpander ( VPBuilder & Builder, ScalarEvolution & SE, DebugLoc DL = {} )

inline

Definition at line 198 of file VPlanUtils.h.

Member Function Documentation

tryToExpand()

VPValue * VPSCEVExpander::tryToExpand

(

const SCEV *

S

)

Try to expand S into recipes and live-ins using the builder.

Returns nullptr if S cannot be expanded yet.

Definition at line 926 of file VPlanUtils.cpp.

References AbstractManglingParser< Derived, Alloc >::Ops, llvm::cast(), llvm::drop_begin(), llvm::SCEV::getSCEVType(), llvm::SCEV::getType(), getValue(), llvm::Mul, llvm::scConstant, llvm::scMulExpr, llvm::scUnknown, llvm::scVScale, tryToExpand(), and llvm::VPInstruction::VScale.

Referenced by llvm::VPlanTransforms::addMinimumIterationCheck(), llvm::VPlanTransforms::expandSCEVsToVPInstructions(), and tryToExpand().

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

• lib/Transforms/Vectorize/VPlanUtils.h
• lib/Transforms/Vectorize/VPlanUtils.cpp