LLVM  4.0.0
Public Member Functions | Static Public Member Functions | List of all members
llvm::ConstantRange Class Reference

This class represents a range of values. More...

#include <ConstantRange.h>

Public Member Functions

 ConstantRange (uint32_t BitWidth, bool isFullSet=true)
 Initialize a full (the default) or empty set for the specified bit width. More...
 
 ConstantRange (APIntMoveTy Value)
 Initialize a range to hold the single specified value. More...
 
 ConstantRange (APIntMoveTy Lower, APIntMoveTy Upper)
 Initialize a range of values explicitly. More...
 
bool getEquivalentICmp (CmpInst::Predicate &Pred, APInt &RHS) const
 Set up Pred and RHS such that ConstantRange::makeExactICmpRegion(Pred, RHS) == *this. More...
 
const APIntgetLower () const
 Return the lower value for this range. More...
 
const APIntgetUpper () const
 Return the upper value for this range. More...
 
uint32_t getBitWidth () const
 Get the bit width of this ConstantRange. More...
 
bool isFullSet () const
 Return true if this set contains all of the elements possible for this data-type. More...
 
bool isEmptySet () const
 Return true if this set contains no members. More...
 
bool isWrappedSet () const
 Return true if this set wraps around the top of the range. More...
 
bool isSignWrappedSet () const
 Return true if this set wraps around the INT_MIN of its bitwidth. More...
 
bool contains (const APInt &Val) const
 Return true if the specified value is in the set. More...
 
bool contains (const ConstantRange &CR) const
 Return true if the other range is a subset of this one. More...
 
const APIntgetSingleElement () const
 If this set contains a single element, return it, otherwise return null. More...
 
const APIntgetSingleMissingElement () const
 If this set contains all but a single element, return it, otherwise return null. More...
 
bool isSingleElement () const
 Return true if this set contains exactly one member. More...
 
APInt getSetSize () const
 Return the number of elements in this set. More...
 
APInt getUnsignedMax () const
 Return the largest unsigned value contained in the ConstantRange. More...
 
APInt getUnsignedMin () const
 Return the smallest unsigned value contained in the ConstantRange. More...
 
APInt getSignedMax () const
 Return the largest signed value contained in the ConstantRange. More...
 
APInt getSignedMin () const
 Return the smallest signed value contained in the ConstantRange. More...
 
bool operator== (const ConstantRange &CR) const
 Return true if this range is equal to another range. More...
 
bool operator!= (const ConstantRange &CR) const
 
ConstantRange subtract (const APInt &CI) const
 Subtract the specified constant from the endpoints of this constant range. More...
 
ConstantRange difference (const ConstantRange &CR) const
 Subtract the specified range from this range (aka relative complement of the sets). More...
 
ConstantRange intersectWith (const ConstantRange &CR) const
 Return the range that results from the intersection of this range with another range. More...
 
ConstantRange unionWith (const ConstantRange &CR) const
 Return the range that results from the union of this range with another range. More...
 
ConstantRange castOp (Instruction::CastOps CastOp, uint32_t BitWidth) const
 Return a new range representing the possible values resulting from an application of the specified cast operator to this range. More...
 
ConstantRange zeroExtend (uint32_t BitWidth) const
 Return a new range in the specified integer type, which must be strictly larger than the current type. More...
 
ConstantRange signExtend (uint32_t BitWidth) const
 Return a new range in the specified integer type, which must be strictly larger than the current type. More...
 
ConstantRange truncate (uint32_t BitWidth) const
 Return a new range in the specified integer type, which must be strictly smaller than the current type. More...
 
ConstantRange zextOrTrunc (uint32_t BitWidth) const
 Make this range have the bit width given by BitWidth. More...
 
ConstantRange sextOrTrunc (uint32_t BitWidth) const
 Make this range have the bit width given by BitWidth. More...
 
ConstantRange binaryOp (Instruction::BinaryOps BinOp, const ConstantRange &Other) const
 Return a new range representing the possible values resulting from an application of the specified binary operator to an left hand side of this range and a right hand side of Other. More...
 
ConstantRange add (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from an addition of a value in this range and a value in Other. More...
 
ConstantRange addWithNoSignedWrap (const APInt &Other) const
 Return a new range representing the possible values resulting from a known NSW addition of a value in this range and Other constant. More...
 
ConstantRange sub (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a subtraction of a value in this range and a value in Other. More...
 
ConstantRange multiply (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a multiplication of a value in this range and a value in Other, treating both this and Other as unsigned ranges. More...
 
ConstantRange smax (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a signed maximum of a value in this range and a value in Other. More...
 
ConstantRange umax (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from an unsigned maximum of a value in this range and a value in Other. More...
 
ConstantRange smin (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a signed minimum of a value in this range and a value in Other. More...
 
ConstantRange umin (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from an unsigned minimum of a value in this range and a value in Other. More...
 
ConstantRange udiv (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from an unsigned division of a value in this range and a value in Other. More...
 
ConstantRange binaryAnd (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a binary-and of a value in this range by a value in Other. More...
 
ConstantRange binaryOr (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a binary-or of a value in this range by a value in Other. More...
 
ConstantRange shl (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a left shift of a value in this range by a value in Other. More...
 
ConstantRange lshr (const ConstantRange &Other) const
 Return a new range representing the possible values resulting from a logical right shift of a value in this range and a value in Other. More...
 
ConstantRange inverse () const
 Return a new range that is the logical not of the current set. More...
 
void print (raw_ostream &OS) const
 Print out the bounds to a stream. More...
 
void dump () const
 Allow printing from a debugger easily. More...
 

Static Public Member Functions

static ConstantRange makeAllowedICmpRegion (CmpInst::Predicate Pred, const ConstantRange &Other)
 Produce the smallest range such that all values that may satisfy the given predicate with any value contained within Other is contained in the returned range. More...
 
static ConstantRange makeSatisfyingICmpRegion (CmpInst::Predicate Pred, const ConstantRange &Other)
 Produce the largest range such that all values in the returned range satisfy the given predicate with all values contained within Other. More...
 
static ConstantRange makeExactICmpRegion (CmpInst::Predicate Pred, const APInt &Other)
 Produce the exact range such that all values in the returned range satisfy the given predicate with any value contained within Other. More...
 
static ConstantRange makeGuaranteedNoWrapRegion (Instruction::BinaryOps BinOp, const ConstantRange &Other, unsigned NoWrapKind)
 Return the largest range containing all X such that "X BinOpC Y" is guaranteed not to wrap (overflow) for all Y in Other. More...
 

Detailed Description

This class represents a range of values.

Definition at line 45 of file ConstantRange.h.

Constructor & Destructor Documentation

ConstantRange::ConstantRange ( uint32_t  BitWidth,
bool  isFullSet = true 
)
explicit

Initialize a full (the default) or empty set for the specified bit width.

Initialize a full (the default) or empty set for the specified type.

Definition at line 34 of file ConstantRange.cpp.

References llvm::APInt::getMaxValue(), and llvm::APInt::getMinValue().

Referenced by add(), addWithNoSignedWrap(), binaryAnd(), binaryOp(), binaryOr(), castOp(), intersectWith(), inverse(), lshr(), makeAllowedICmpRegion(), makeGuaranteedNoWrapRegion(), multiply(), shl(), signExtend(), smax(), smin(), sub(), subtract(), truncate(), udiv(), umax(), umin(), unionWith(), and zeroExtend().

ConstantRange::ConstantRange ( APIntMoveTy  Value)

Initialize a range to hold the single specified value.

Definition at line 43 of file ConstantRange.cpp.

References llvm::Lower, and llvm::Upper.

ConstantRange::ConstantRange ( APIntMoveTy  Lower,
APIntMoveTy  Upper 
)

Initialize a range of values explicitly.

This will assert out if Lower==Upper and Lower != Min or Max value for its type. It will also assert out if the two APInt's are not the same bit width.

Definition at line 46 of file ConstantRange.cpp.

References assert(), llvm::APInt::getBitWidth(), llvm::APInt::isMaxValue(), llvm::APInt::isMinValue(), llvm::Lower, and llvm::Upper.

Member Function Documentation

ConstantRange ConstantRange::add ( const ConstantRange Other) const

Return a new range representing the possible values resulting from an addition of a value in this range and a value in Other.

Definition at line 736 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getLower(), getSetSize(), getUpper(), isEmptySet(), isFullSet(), llvm::APInt::ult(), and X.

Referenced by binaryOp().

ConstantRange ConstantRange::addWithNoSignedWrap ( const APInt Other) const

Return a new range representing the possible values resulting from a known NSW addition of a value in this range and Other constant.

Definition at line 756 of file ConstantRange.cpp.

References llvm::MCID::Add, ConstantRange(), intersectWith(), makeGuaranteedNoWrapRegion(), and llvm::OverflowingBinaryOperator::NoSignedWrap.

ConstantRange ConstantRange::binaryAnd ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a binary-and of a value in this range by a value in Other.

Definition at line 925 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), llvm::APInt::getNullValue(), getUnsignedMax(), llvm::APInt::isAllOnesValue(), isEmptySet(), umin(), and llvm::APIntOps::umin().

Referenced by binaryOp().

ConstantRange ConstantRange::binaryOp ( Instruction::BinaryOps  BinOp,
const ConstantRange Other 
) const

Return a new range representing the possible values resulting from an application of the specified binary operator to an left hand side of this range and a right hand side of Other.

Definition at line 699 of file ConstantRange.cpp.

References llvm::MCID::Add, add(), llvm::APIntOps::And(), assert(), binaryAnd(), binaryOr(), ConstantRange(), getBitWidth(), lshr(), multiply(), llvm::APIntOps::Or(), shl(), sub(), and udiv().

ConstantRange ConstantRange::binaryOr ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a binary-or of a value in this range by a value in Other.

Definition at line 938 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), llvm::APInt::getNullValue(), getUnsignedMin(), isEmptySet(), llvm::APInt::isMinValue(), umax(), and llvm::APIntOps::umax().

Referenced by binaryOp().

ConstantRange ConstantRange::castOp ( Instruction::CastOps  CastOp,
uint32_t  BitWidth 
) const

Return a new range representing the possible values resulting from an application of the specified cast operator to this range.

BitWidth is the target bitwidth of the cast. For casts which don't change bitwidth, it must be the same as the source bitwidth. For casts which do change bitwidth, the bitwidth must be consistent with the requested cast and source bitwidth.

Definition at line 537 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), llvm::APInt::getMaxValue(), llvm::APInt::getMinValue(), llvm::APInt::getSignedMaxValue(), llvm::APInt::getSignedMinValue(), llvm_unreachable, llvm::Max, llvm::Min, llvm::APInt::sextOrSelf(), signExtend(), truncate(), zeroExtend(), and llvm::APInt::zextOrSelf().

bool ConstantRange::contains ( const APInt Val) const
bool ConstantRange::contains ( const ConstantRange Other) const

Return true if the other range is a subset of this one.

contains - Return true if the argument is a subset of this range.

Two equal sets contain each other. The empty set contained by all other sets.

Definition at line 340 of file ConstantRange.cpp.

References getLower(), getUpper(), isEmptySet(), isFullSet(), isWrappedSet(), and llvm::APInt::ule().

ConstantRange ConstantRange::difference ( const ConstantRange CR) const

Subtract the specified range from this range (aka relative complement of the sets).

Definition at line 370 of file ConstantRange.cpp.

References intersectWith(), and inverse().

Referenced by getEdgeValueLocal(), and isImpliedCondMatchingImmOperands().

LLVM_DUMP_METHOD void ConstantRange::dump ( ) const

Allow printing from a debugger easily.

dump - Allow printing from a debugger easily...

Definition at line 1001 of file ConstantRange.cpp.

References llvm::dbgs(), and print().

uint32_t llvm::ConstantRange::getBitWidth ( ) const
inline
bool ConstantRange::getEquivalentICmp ( CmpInst::Predicate Pred,
APInt RHS 
) const
const APInt& llvm::ConstantRange::getLower ( ) const
inline
APInt ConstantRange::getSetSize ( ) const

Return the number of elements in this set.

getSetSize - Return the number of elements in this set.

Definition at line 264 of file ConstantRange.cpp.

References getBitWidth(), isFullSet(), llvm::APInt::setBit(), and llvm::APInt::zext().

Referenced by add(), intersectWith(), multiply(), and sub().

APInt ConstantRange::getSignedMax ( ) const
APInt ConstantRange::getSignedMin ( ) const
const APInt* llvm::ConstantRange::getSingleElement ( ) const
inline

If this set contains a single element, return it, otherwise return null.

Definition at line 165 of file ConstantRange.h.

Referenced by llvm::LazyValueInfo::getConstant(), llvm::LazyValueInfo::getConstantOnEdge(), getEquivalentICmp(), isSingleElement(), and makeGuaranteedNoWrapRegion().

const APInt* llvm::ConstantRange::getSingleMissingElement ( ) const
inline

If this set contains all but a single element, return it, otherwise return null.

Definition at line 173 of file ConstantRange.h.

Referenced by getEquivalentICmp().

APInt ConstantRange::getUnsignedMax ( ) const
APInt ConstantRange::getUnsignedMin ( ) const

Return the smallest unsigned value contained in the ConstantRange.

getUnsignedMin - Return the smallest unsigned value contained in the ConstantRange.

Definition at line 287 of file ConstantRange.cpp.

References getBitWidth(), getLower(), llvm::APInt::getMinValue(), getUpper(), isFullSet(), and isWrappedSet().

Referenced by llvm::SCEVAAResult::alias(), binaryOr(), llvm::SelectionDAGBuilder::lowerRangeToAssertZExt(), lshr(), makeAllowedICmpRegion(), multiply(), shl(), llvm::ScalarEvolution::SimplifyICmpOperands(), udiv(), umax(), and umin().

const APInt& llvm::ConstantRange::getUpper ( ) const
inline
ConstantRange ConstantRange::intersectWith ( const ConstantRange CR) const

Return the range that results from the intersection of this range with another range.

intersectWith - Return the range that results from the intersection of this range with another range.

The resultant range is guaranteed to include all elements contained in both input ranges, and to have the smallest possible set size that does so. Because there may be two intersections with the same set size, A.intersectWith(B) might not be equal to B.intersectWith(A).

Definition at line 379 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), getSetSize(), intersectWith(), isEmptySet(), isFullSet(), isWrappedSet(), llvm::APInt::ule(), and llvm::APInt::ult().

Referenced by addWithNoSignedWrap(), canBeMerged(), difference(), intersectWith(), isImpliedCondMatchingImmOperands(), and simplifyICmpWithConstant().

ConstantRange ConstantRange::inverse ( ) const

Return a new range that is the logical not of the current set.

Definition at line 980 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), isEmptySet(), and isFullSet().

Referenced by difference(), getPredicateResult(), makeGuaranteedNoWrapRegion(), makeSatisfyingICmpRegion(), and simplifyICmpWithConstant().

bool ConstantRange::isEmptySet ( ) const
bool ConstantRange::isFullSet ( ) const

Return true if this set contains all of the elements possible for this data-type.

isFullSet - Return true if this set contains all of the elements possible for this data-type

Definition at line 237 of file ConstantRange.cpp.

References llvm::APInt::isMaxValue().

Referenced by add(), contains(), getEquivalentICmp(), llvm::MDNode::getMostGenericRange(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), getSetSize(), getUnsignedMax(), getUnsignedMin(), intersectWith(), inverse(), llvm::SelectionDAGBuilder::lowerRangeToAssertZExt(), print(), signExtend(), llvm::ScalarEvolution::SimplifyICmpOperands(), simplifyICmpWithConstant(), sub(), truncate(), udiv(), unionWith(), and zeroExtend().

bool ConstantRange::isSignWrappedSet ( ) const

Return true if this set wraps around the INT_MIN of its bitwidth.

isSignWrappedSet - Return true if this set wraps around the INT_MIN of its bitwidth, for example: i8 [120, 140).

For example: i8 [120, 140).

Definition at line 257 of file ConstantRange.cpp.

References contains(), getBitWidth(), llvm::APInt::getSignedMaxValue(), and llvm::APInt::getSignedMinValue().

Referenced by signExtend().

bool llvm::ConstantRange::isSingleElement ( ) const
inline

Return true if this set contains exactly one member.

Definition at line 181 of file ConstantRange.h.

References getSingleElement().

Referenced by getPredicateResult(), and makeAllowedICmpRegion().

bool ConstantRange::isWrappedSet ( ) const

Return true if this set wraps around the top of the range.

isWrappedSet - Return true if this set wraps around the top of the range, for example: [100, 8)

For example: [100, 8).

Definition at line 250 of file ConstantRange.cpp.

References llvm::APInt::ugt().

Referenced by contains(), getSignedMax(), getSignedMin(), getUnsignedMax(), getUnsignedMin(), intersectWith(), llvm::SelectionDAGBuilder::lowerRangeToAssertZExt(), multiply(), truncate(), unionWith(), and zeroExtend().

ConstantRange ConstantRange::lshr ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a logical right shift of a value in this range and a value in Other.

Definition at line 968 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), llvm::APInt::lshr(), and fuzzer::min().

Referenced by binaryOp().

ConstantRange ConstantRange::makeAllowedICmpRegion ( CmpInst::Predicate  Pred,
const ConstantRange Other 
)
static

Produce the smallest range such that all values that may satisfy the given predicate with any value contained within Other is contained in the returned range.

Formally, this returns a superset of 'union over all y in Other . { x : icmp op x y is true }'. If the exact answer is not representable as a ConstantRange, the return value will be a proper superset of the above.

Example: Pred = ult and Other = i8 [2, 5) returns Result = [0, 4)

Definition at line 54 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getLower(), llvm::APInt::getMinValue(), llvm::APInt::getNullValue(), getSignedMax(), getSignedMin(), llvm::APInt::getSignedMinValue(), getUnsignedMax(), getUnsignedMin(), getUpper(), 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, isEmptySet(), isSingleElement(), and llvm_unreachable.

Referenced by getValueFromICmpCondition(), isImpliedCondMatchingImmOperands(), makeExactICmpRegion(), makeSatisfyingICmpRegion(), and SimplifyAndOfICmps().

ConstantRange ConstantRange::makeExactICmpRegion ( CmpInst::Predicate  Pred,
const APInt Other 
)
static

Produce the exact range such that all values in the returned range satisfy the given predicate with any value contained within Other.

Formally, this returns the exact answer when the superset of 'union over all y in Other is exactly same as the subset of intersection over all y in Other. { x : icmp op x y is true}'.

Example: Pred = ult and Other = i8 3 returns [0, 3)

Definition at line 130 of file ConstantRange.cpp.

References assert(), makeAllowedICmpRegion(), and makeSatisfyingICmpRegion().

Referenced by getEquivalentICmp(), getPredicateResult(), isImpliedCondMatchingImmOperands(), llvm::ScalarEvolution::SimplifyICmpOperands(), and simplifyICmpWithConstant().

ConstantRange ConstantRange::makeGuaranteedNoWrapRegion ( Instruction::BinaryOps  BinOp,
const ConstantRange Other,
unsigned  NoWrapKind 
)
static

Return the largest range containing all X such that "X BinOpC Y" is guaranteed not to wrap (overflow) for all Y in Other.

NB! The returned set does not contain all possible values of X for which "X BinOpC Y" does not wrap – some viable values of X may be missing, so you cannot use this to contrain X's range. E.g. in the last example, "(-2) + 1" is both nsw and nuw (so the "X" could be -2), but (-2) is not in the set returned.

Examples: typedef OverflowingBinaryOperator OBO; #define MGNR makeGuaranteedNoWrapRegion MGNR(Add, [i8 1, 2), OBO::NoSignedWrap) == [-128, 127) MGNR(Add, [i8 1, 2), OBO::NoUnsignedWrap) == [0, -1) MGNR(Add, [i8 0, 1), OBO::NoUnsignedWrap) == Full Set MGNR(Add, [i8 1, 2), OBO::NoUnsignedWrap | OBO::NoSignedWrap) == [0,INT_MAX) MGNR(Add, [i8 -1, 6), OBO::NoSignedWrap) == [INT_MIN+1, INT_MAX-4)

Definition at line 177 of file ConstantRange.cpp.

References llvm::MCID::Add, assert(), C, ConstantRange(), getBitWidth(), llvm::APInt::getNullValue(), getSignedMax(), getSignedMin(), llvm::APInt::getSignedMinValue(), getSingleElement(), getUnsignedMax(), inverse(), llvm::APInt::isNegative(), llvm::APInt::isStrictlyPositive(), and unionWith().

Referenced by addWithNoSignedWrap(), processAdd(), and StrengthenNoWrapFlags().

ConstantRange ConstantRange::makeSatisfyingICmpRegion ( CmpInst::Predicate  Pred,
const ConstantRange Other 
)
static

Produce the largest range such that all values in the returned range satisfy the given predicate with all values contained within Other.

Formally, this returns a subset of 'intersection over all y in Other . { x : icmp op x y is true }'. If the exact answer is not representable as a ConstantRange, the return value will be a proper subset of the above.

Example: Pred = ult and Other = i8 [2, 5) returns [0, 2)

Definition at line 120 of file ConstantRange.cpp.

References llvm::CmpInst::getInversePredicate(), inverse(), and makeAllowedICmpRegion().

Referenced by makeExactICmpRegion(), and SimplifyICmpInst().

ConstantRange ConstantRange::multiply ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a multiplication of a value in this range and a value in Other, treating both this and Other as unsigned ranges.

Definition at line 791 of file ConstantRange.cpp.

References A, B, llvm::MCID::Compare, ConstantRange(), getBitWidth(), getLower(), getSetSize(), getSignedMax(), getSignedMin(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), llvm::APInt::isNonNegative(), isWrappedSet(), L, fuzzer::min(), llvm::APInt::sext(), llvm::APInt::slt(), truncate(), llvm::APInt::ult(), and llvm::APInt::zext().

Referenced by binaryOp().

bool llvm::ConstantRange::operator!= ( const ConstantRange CR) const
inline

Definition at line 208 of file ConstantRange.h.

References operator==().

bool llvm::ConstantRange::operator== ( const ConstantRange CR) const
inline

Return true if this range is equal to another range.

Definition at line 205 of file ConstantRange.h.

Referenced by operator!=().

void ConstantRange::print ( raw_ostream OS) const

Print out the bounds to a stream.

print - Print out the bounds to a stream...

Definition at line 990 of file ConstantRange.cpp.

References isEmptySet(), and isFullSet().

Referenced by dump(), llvm::operator<<(), and llvm::ScalarEvolution::print().

ConstantRange ConstantRange::sextOrTrunc ( uint32_t  DstTySize) const

Make this range have the bit width given by BitWidth.

sextOrTrunc - make this range have the bit width given by DstTySize.

The value is sign extended, truncated, or left alone to make it that width.

Definition at line 690 of file ConstantRange.cpp.

References getBitWidth(), signExtend(), and truncate().

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

ConstantRange ConstantRange::shl ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a left shift of a value in this range by a value in Other.

TODO: This isn't fully implemented yet.

Definition at line 951 of file ConstantRange.cpp.

References ConstantRange(), llvm::countLeadingZeros(), getBitWidth(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), fuzzer::min(), llvm::APInt::shl(), and llvm::APInt::ugt().

Referenced by binaryOp().

ConstantRange ConstantRange::signExtend ( uint32_t  DstTySize) const

Return a new range in the specified integer type, which must be strictly larger than the current type.

signExtend - Return a new range in the specified integer type, which must be strictly larger than the current type.

The returned range will correspond to the possible range of values if the source range had been sign extended to BitWidth.

The returned range will correspond to the possible range of values as if the source range had been sign extended.

Definition at line 604 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), llvm::APInt::getHighBitsSet(), llvm::APInt::getLowBitsSet(), isEmptySet(), isFullSet(), llvm::APInt::isMinSignedValue(), isSignWrappedSet(), llvm::APInt::sext(), and llvm::APInt::zext().

Referenced by castOp(), llvm::ScalarEvolution::getSignExtendExpr(), and sextOrTrunc().

ConstantRange ConstantRange::smax ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a signed maximum of a value in this range and a value in Other.

Definition at line 844 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getSignedMax(), getSignedMin(), isEmptySet(), and llvm::APIntOps::smax().

ConstantRange ConstantRange::smin ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a signed minimum of a value in this range and a value in Other.

Definition at line 870 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getSignedMax(), getSignedMin(), isEmptySet(), and llvm::APIntOps::smin().

ConstantRange ConstantRange::sub ( const ConstantRange Other) const

Return a new range representing the possible values resulting from a subtraction of a value in this range and a value in Other.

Definition at line 770 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getLower(), getSetSize(), getUpper(), isEmptySet(), isFullSet(), llvm::APInt::ult(), and X.

Referenced by binaryOp().

ConstantRange ConstantRange::subtract ( const APInt Val) const

Subtract the specified constant from the endpoints of this constant range.

subtract - Subtract the specified constant from the endpoints of this constant range.

Definition at line 360 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), and llvm::APInt::getBitWidth().

Referenced by llvm::SCEVAddRecExpr::getNumIterationsInRange(), and getValueFromICmpCondition().

ConstantRange ConstantRange::truncate ( uint32_t  DstTySize) const

Return a new range in the specified integer type, which must be strictly smaller than the current type.

truncate - Return a new range in the specified integer type, which must be strictly smaller than the current type.

The returned range will correspond to the possible range of values if the source range had been truncated to the specified type.

The returned range will correspond to the possible range of values as if the source range had been truncated to the specified type.

Definition at line 626 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), llvm::APInt::getMaxValue(), isEmptySet(), isFullSet(), isWrappedSet(), llvm::APInt::setBit(), llvm::APInt::trunc(), llvm::APInt::udivrem(), llvm::APInt::uge(), llvm::APInt::ule(), llvm::APInt::ult(), unionWith(), and llvm::APInt::zext().

Referenced by castOp(), llvm::ScalarEvolution::getSignExtendExpr(), llvm::ScalarEvolution::getZeroExtendExpr(), multiply(), sextOrTrunc(), and zextOrTrunc().

ConstantRange ConstantRange::udiv ( const ConstantRange Other) const

Return a new range representing the possible values resulting from an unsigned division of a value in this range and a value in Other.

Definition at line 896 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getLower(), getUnsignedMax(), getUnsignedMin(), getUpper(), isEmptySet(), isFullSet(), and llvm::APInt::udiv().

Referenced by binaryOp().

ConstantRange ConstantRange::umax ( const ConstantRange Other) const

Return a new range representing the possible values resulting from an unsigned maximum of a value in this range and a value in Other.

Definition at line 857 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), and llvm::APIntOps::umax().

Referenced by binaryOr().

ConstantRange ConstantRange::umin ( const ConstantRange Other) const

Return a new range representing the possible values resulting from an unsigned minimum of a value in this range and a value in Other.

Definition at line 883 of file ConstantRange.cpp.

References ConstantRange(), getBitWidth(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), and llvm::APIntOps::umin().

Referenced by binaryAnd().

ConstantRange ConstantRange::unionWith ( const ConstantRange CR) const

Return the range that results from the union of this range with another range.

unionWith - Return the range that results from the union of this range with another range.

The resultant range is guaranteed to include the elements of both sets, but may contain more. For example, [3, 9) union [12,15) is [3, 15), which includes 9, 10, and 11, which were not included in either set before.

Definition at line 460 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), if(), isEmptySet(), isFullSet(), isWrappedSet(), L, llvm::APInt::uge(), llvm::APInt::ugt(), llvm::APInt::ule(), llvm::APInt::ult(), and unionWith().

Referenced by getEdgeValueLocal(), makeGuaranteedNoWrapRegion(), truncate(), tryMergeRange(), and unionWith().

ConstantRange ConstantRange::zeroExtend ( uint32_t  DstTySize) const

Return a new range in the specified integer type, which must be strictly larger than the current type.

zeroExtend - Return a new range in the specified integer type, which must be strictly larger than the current type.

The returned range will correspond to the possible range of values if the source range had been zero extended to BitWidth.

The returned range will correspond to the possible range of values as if the source range had been zero extended.

Definition at line 584 of file ConstantRange.cpp.

References assert(), ConstantRange(), getBitWidth(), llvm::APInt::getOneBitSet(), isEmptySet(), isFullSet(), isWrappedSet(), and llvm::APInt::zext().

Referenced by castOp(), llvm::ScalarEvolution::getZeroExtendExpr(), and zextOrTrunc().

ConstantRange ConstantRange::zextOrTrunc ( uint32_t  DstTySize) const

Make this range have the bit width given by BitWidth.

zextOrTrunc - make this range have the bit width given by DstTySize.

The value is zero extended, truncated, or left alone to make it that width.

Definition at line 679 of file ConstantRange.cpp.

References getBitWidth(), truncate(), and zeroExtend().

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


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