llvm::ScalarEvolution::LoopGuards Class Reference

#include "llvm/Analysis/ScalarEvolution.h"

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

Static Public Member Functions
static 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 1302 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 15091 of file ScalarEvolution.cpp.

References llvm::append_range(), assert(), llvm::AssumptionCache::assumptions(), llvm::CallingConv::C, Cond, llvm::ConstantRange::contains(), llvm::ScalarEvolution::containsAddRecurrence(), llvm::DominatorTree::dominates(), llvm::SmallVectorImpl< T >::emplace_back(), llvm::SmallVectorBase< Size_T >::empty(), From, llvm::ScalarEvolution::getAddExpr(), llvm::BranchInst::getCondition(), llvm::ScalarEvolution::getConstant(), llvm::Module::getFunction(), llvm::ScalarEvolution::getMinMaxExpr(), llvm::ScalarEvolution::getMinusSCEV(), llvm::ScalarEvolution::getMulExpr(), llvm::Intrinsic::getName(), llvm::ScalarEvolution::getOne(), llvm::GlobalValue::getParent(), llvm::ScalarEvolution::getSCEV(), llvm::ScalarEvolution::getSignedRange(), llvm::ScalarEvolution::getSMaxExpr(), llvm::ScalarEvolution::getSMinExpr(), llvm::BranchInst::getSuccessor(), llvm::CmpInst::getSwappedPredicate(), llvm::Value::getType(), llvm::ScalarEvolution::getUDivExpr(), llvm::ScalarEvolution::getUMaxExpr(), llvm::ScalarEvolution::getUMinExpr(), llvm::ScalarEvolution::getUnsignedRange(), llvm::ScalarEvolution::getURemExpr(), llvm::SCEVConstant::getValue(), I, llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGE, llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLE, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::ScalarEvolution::isKnownNonNegative(), llvm::Constant::isNullValue(), llvm::Type::isPointerTy(), llvm::BranchInst::isUnconditional(), llvm::APInt::isZero(), llvm::SCEV::isZero(), LHS, llvm::PatternMatch::m_LogicalAnd(), llvm::PatternMatch::m_LogicalOr(), llvm::PatternMatch::m_Value(), llvm::ConstantRange::makeExactICmpRegion(), llvm::PatternMatch::match(), llvm::Mul, llvm::SCEV::operands(), llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::reverse(), rewrite(), RHS, llvm::SmallVectorBase< Size_T >::size(), llvm::SMax, llvm::SMin, llvm::ConstantRange::sub(), std::swap(), llvm::UMax, llvm::UMin, and llvm::APInt::urem().

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

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 15529 of file ScalarEvolution.cpp.

References llvm::SCEV::FlagAnyWrap, llvm::SCEV::FlagNSW, llvm::SCEV::FlagNUW, llvm::IntegerType::get(), llvm::ScalarEvolution::getAddExpr(), llvm::ScalarEvolution::getContext(), llvm::ScalarEvolution::getMulExpr(), llvm::SCEVNAryExpr::getNoWrapFlags(), llvm::SCEVCastExpr::getOperand(), llvm::Type::getScalarSizeInBits(), llvm::SCEVCastExpr::getType(), llvm::ScalarEvolution::getZeroExtendExpr(), I, llvm::ScalarEvolution::maskFlags(), llvm::SCEVNAryExpr::operands(), Operands, Rewriter, llvm::ScalarEvolution::setFlags(), llvm::SCEVRewriteVisitor< SC >::visitSignExtendExpr(), llvm::SCEVRewriteVisitor< SC >::visitSMinExpr(), llvm::SCEVRewriteVisitor< SC >::visitUMinExpr(), and llvm::SCEVRewriteVisitor< SC >::visitZeroExtendExpr().

Referenced by llvm::ScalarEvolution::applyLoopGuards(), and collect().

---

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

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