llvm::ScalarEvolution::LoopGuards Class Reference

#include "llvm/Analysis/ScalarEvolution.h"

Public Member Functions
LLVM_ABI const SCEV *	rewrite (const SCEV *Expr) const
	Try to apply the collected loop guards to Expr.

Static Public Member Functions
static LLVM_ABI LoopGuards	collect (const Loop *L, ScalarEvolution &SE)
	Collect rewrite map for loop guards for loop L, together with flags indicating if NUW and NSW can be preserved during rewriting.

Detailed Description

Definition at line 1342 of file ScalarEvolution.h.

Member Function Documentation

collect()

ScalarEvolution::LoopGuards ScalarEvolution::LoopGuards::collect ( const Loop * L, ScalarEvolution & SE )

static

Collect rewrite map for loop guards for loop L, together with flags indicating if NUW and NSW can be preserved during rewriting.

Definition at line 15461 of file ScalarEvolution.cpp.

References llvm::ScalarEvolution::ScalarEvolution().

Referenced by llvm::ScalarEvolution::applyLoopGuards(), evaluatePtrAddRecAtMaxBTCWillNotWrap(), llvm::isDereferenceableAndAlignedInLoop(), and shouldPeelLastIteration().

rewrite()

const SCEV * ScalarEvolution::LoopGuards::rewrite

(

const SCEV *

Expr

)

const

Try to apply the collected loop guards to Expr.

A rewriter to replace SCEV expressions in Map with the corresponding entry in the map. It skips AddRecExpr because we cannot guarantee that the replacement is loop invariant in the loop of the AddRec.

Definition at line 15994 of file ScalarEvolution.cpp.

References Changed, llvm::SCEV::FlagAnyWrap, llvm::SCEV::FlagNSW, llvm::SCEV::FlagNUW, llvm::IntegerType::get(), llvm::SCEVNAryExpr::getNoWrapFlags(), llvm::SCEVNAryExpr::getNumOperands(), llvm::SCEVCastExpr::getOperand(), llvm::SCEVNAryExpr::getOperand(), llvm::SCEVCastExpr::getType(), llvm::isa(), llvm::ScalarEvolution::maskFlags(), Operands, llvm::SCEVNAryExpr::operands(), Rewriter, llvm::ScalarEvolution::ScalarEvolution(), llvm::ScalarEvolution::SCEVUnknown, llvm::ScalarEvolution::setFlags(), llvm::SCEVRewriteVisitor< SC >::visit(), llvm::SCEVRewriteVisitor< SC >::visitSignExtendExpr(), llvm::SCEVRewriteVisitor< SC >::visitSMinExpr(), llvm::SCEVRewriteVisitor< SC >::visitUMinExpr(), and llvm::SCEVRewriteVisitor< SC >::visitZeroExtendExpr().

Referenced by llvm::ScalarEvolution::applyLoopGuards().

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

• include/llvm/Analysis/ScalarEvolution.h
• lib/Analysis/ScalarEvolution.cpp