LLVM: llvm::ConstantRange Class Reference (original) (raw)
This class represents a range of values. More...
#include "[llvm/IR/ConstantRange.h](ConstantRange%5F8h%5Fsource.html)"
| Public Types | |
|---|---|
| enum | PreferredRangeType { Smallest, Unsigned, Signed } |
| If represented precisely, the result of some range operations may consist of multiple disjoint ranges. More... | |
| enum class | OverflowResult { AlwaysOverflowsLow, AlwaysOverflowsHigh, MayOverflow, NeverOverflows } |
| Represents whether an operation on the given constant range is known to always or never overflow. More... | |
| Public Member Functions | |
|---|---|
| ConstantRange (uint32_t BitWidth, bool isFullSet) | |
| Initialize a full or empty set for the specified bit width. | |
| ConstantRange (APInt Value) | |
| Initialize a range to hold the single specified value. | |
| ConstantRange (APInt Lower, APInt Upper) | |
| Initialize a range of values explicitly. | |
| bool | icmp (CmpInst::Predicate Pred, const ConstantRange &Other) const |
| Does the predicate Pred hold between ranges this and Other? NOTE: false does not mean that inverse predicate holds! | |
| bool | getEquivalentICmp (CmpInst::Predicate &Pred, APInt &RHS) const |
| Set up Pred and RHS such that ConstantRange::makeExactICmpRegion(Pred, RHS) == *this. | |
| void | getEquivalentICmp (CmpInst::Predicate &Pred, APInt &RHS, APInt &Offset) const |
| Set up Pred, RHS and Offset such that (V + Offset) Pred RHS is true iff V is in the range. | |
| const APInt & | getLower () const |
| Return the lower value for this range. | |
| const APInt & | getUpper () const |
| Return the upper value for this range. | |
| uint32_t | getBitWidth () const |
| Get the bit width of this ConstantRange. | |
| bool | isFullSet () const |
| Return true if this set contains all of the elements possible for this data-type. | |
| bool | isEmptySet () const |
| Return true if this set contains no members. | |
| bool | isWrappedSet () const |
| Return true if this set wraps around the unsigned domain. | |
| bool | isUpperWrapped () const |
| Return true if the exclusive upper bound wraps around the unsigned domain. | |
| bool | isSignWrappedSet () const |
| Return true if this set wraps around the signed domain. | |
| bool | isUpperSignWrapped () const |
| Return true if the (exclusive) upper bound wraps around the signed domain. | |
| bool | contains (const APInt &Val) const |
| Return true if the specified value is in the set. | |
| bool | contains (const ConstantRange &CR) const |
| Return true if the other range is a subset of this one. | |
| const APInt * | getSingleElement () const |
| If this set contains a single element, return it, otherwise return null. | |
| const APInt * | getSingleMissingElement () const |
| If this set contains all but a single element, return it, otherwise return null. | |
| bool | isSingleElement () const |
| Return true if this set contains exactly one member. | |
| bool | isSizeStrictlySmallerThan (const ConstantRange &CR) const |
| Compare set size of this range with the range CR. | |
| bool | isSizeLargerThan (uint64_t MaxSize) const |
| Compare set size of this range with Value. | |
| bool | isAllNegative () const |
| Return true if all values in this range are negative. | |
| bool | isAllNonNegative () const |
| Return true if all values in this range are non-negative. | |
| bool | isAllPositive () const |
| Return true if all values in this range are positive. | |
| APInt | getUnsignedMax () const |
| Return the largest unsigned value contained in the ConstantRange. | |
| APInt | getUnsignedMin () const |
| Return the smallest unsigned value contained in the ConstantRange. | |
| APInt | getSignedMax () const |
| Return the largest signed value contained in the ConstantRange. | |
| APInt | getSignedMin () const |
| Return the smallest signed value contained in the ConstantRange. | |
| bool | operator== (const ConstantRange &CR) const |
| Return true if this range is equal to another range. | |
| bool | operator!= (const ConstantRange &CR) const |
| unsigned | getActiveBits () const |
| Compute the maximal number of active bits needed to represent every value in this range. | |
| unsigned | getMinSignedBits () const |
| Compute the maximal number of bits needed to represent every value in this signed range. | |
| ConstantRange | subtract (const APInt &CI) const |
| Subtract the specified constant from the endpoints of this constant range. | |
| ConstantRange | difference (const ConstantRange &CR) const |
| Subtract the specified range from this range (aka relative complement of the sets). | |
| ConstantRange | intersectWith (const ConstantRange &CR, PreferredRangeType Type=Smallest) const |
| Return the range that results from the intersection of this range with another range. | |
| ConstantRange | unionWith (const ConstantRange &CR, PreferredRangeType Type=Smallest) const |
| Return the range that results from the union of this range with another range. | |
| std::optional< ConstantRange > | exactIntersectWith (const ConstantRange &CR) const |
| Intersect the two ranges and return the result if it can be represented exactly, otherwise return std::nullopt. | |
| std::optional< ConstantRange > | exactUnionWith (const ConstantRange &CR) const |
| Union the two ranges and return the result if it can be represented exactly, otherwise return std::nullopt. | |
| 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. | |
| ConstantRange | zeroExtend (uint32_t BitWidth) const |
| Return a new range in the specified integer type, which must be strictly larger than the current type. | |
| ConstantRange | signExtend (uint32_t BitWidth) const |
| Return a new range in the specified integer type, which must be strictly larger than the current type. | |
| ConstantRange | truncate (uint32_t BitWidth) const |
| Return a new range in the specified integer type, which must be strictly smaller than the current type. | |
| ConstantRange | zextOrTrunc (uint32_t BitWidth) const |
| Make this range have the bit width given by BitWidth. | |
| ConstantRange | sextOrTrunc (uint32_t BitWidth) const |
| Make this range have the bit width given by BitWidth. | |
| 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. | |
| ConstantRange | overflowingBinaryOp (Instruction::BinaryOps BinOp, const ConstantRange &Other, unsigned NoWrapKind) const |
| Return a new range representing the possible values resulting from an application of the specified overflowing binary operator to a left hand side of this range and a right hand side of Other given the provided knowledge about lack of wrapping NoWrapKind. | |
| 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. | |
| ConstantRange | addWithNoWrap (const ConstantRange &Other, unsigned NoWrapKind, PreferredRangeType RangeType=Smallest) const |
| Return a new range representing the possible values resulting from an addition with wrap type NoWrapKind of a value in this range and a value in Other. | |
| 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. | |
| ConstantRange | subWithNoWrap (const ConstantRange &Other, unsigned NoWrapKind, PreferredRangeType RangeType=Smallest) const |
| Return a new range representing the possible values resulting from an subtraction with wrap type NoWrapKind of a value in this range and a value in Other. | |
| 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. | |
| ConstantRange | multiplyWithNoWrap (const ConstantRange &Other, unsigned NoWrapKind, PreferredRangeType RangeType=Smallest) const |
| Return a new range representing the possible values resulting from a multiplication with wrap type NoWrapKind of a value in this range and a value in Other. | |
| ConstantRange | smul_fast (const ConstantRange &Other) const |
| Return range of possible values for a signed multiplication of this and Other. | |
| 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. | |
| 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. | |
| 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. | |
| 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. | |
| 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. | |
| ConstantRange | sdiv (const ConstantRange &Other) const |
| Return a new range representing the possible values resulting from a signed division of a value in this range and a value in Other. | |
| ConstantRange | urem (const ConstantRange &Other) const |
| Return a new range representing the possible values resulting from an unsigned remainder operation of a value in this range and a value in Other. | |
| ConstantRange | srem (const ConstantRange &Other) const |
| Return a new range representing the possible values resulting from a signed remainder operation of a value in this range and a value in Other. | |
| ConstantRange | binaryNot () const |
| Return a new range representing the possible values resulting from a binary-xor of a value in this range by an all-one value, aka bitwise complement operation. | |
| 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. | |
| 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. | |
| ConstantRange | binaryXor (const ConstantRange &Other) const |
| Return a new range representing the possible values resulting from a binary-xor of a value in this range by a value in Other. | |
| 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. | |
| ConstantRange | shlWithNoWrap (const ConstantRange &Other, unsigned NoWrapKind, PreferredRangeType RangeType=Smallest) const |
| Return a new range representing the possible values resulting from a left shift with wrap type NoWrapKind of a value in this range and a value in Other. | |
| 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. | |
| ConstantRange | ashr (const ConstantRange &Other) const |
| Return a new range representing the possible values resulting from a arithmetic right shift of a value in this range and a value in Other. | |
| ConstantRange | uadd_sat (const ConstantRange &Other) const |
| Perform an unsigned saturating addition of two constant ranges. | |
| ConstantRange | sadd_sat (const ConstantRange &Other) const |
| Perform a signed saturating addition of two constant ranges. | |
| ConstantRange | usub_sat (const ConstantRange &Other) const |
| Perform an unsigned saturating subtraction of two constant ranges. | |
| ConstantRange | ssub_sat (const ConstantRange &Other) const |
| Perform a signed saturating subtraction of two constant ranges. | |
| ConstantRange | umul_sat (const ConstantRange &Other) const |
| Perform an unsigned saturating multiplication of two constant ranges. | |
| ConstantRange | smul_sat (const ConstantRange &Other) const |
| Perform a signed saturating multiplication of two constant ranges. | |
| ConstantRange | ushl_sat (const ConstantRange &Other) const |
| Perform an unsigned saturating left shift of this constant range by a value in Other. | |
| ConstantRange | sshl_sat (const ConstantRange &Other) const |
| Perform a signed saturating left shift of this constant range by a value in Other. | |
| ConstantRange | inverse () const |
| Return a new range that is the logical not of the current set. | |
| ConstantRange | abs (bool IntMinIsPoison=false) const |
| Calculate absolute value range. | |
| ConstantRange | ctlz (bool ZeroIsPoison=false) const |
| Calculate ctlz range. | |
| ConstantRange | cttz (bool ZeroIsPoison=false) const |
| Calculate cttz range. | |
| ConstantRange | ctpop () const |
| Calculate ctpop range. | |
| OverflowResult | unsignedAddMayOverflow (const ConstantRange &Other) const |
| Return whether unsigned add of the two ranges always/never overflows. | |
| OverflowResult | signedAddMayOverflow (const ConstantRange &Other) const |
| Return whether signed add of the two ranges always/never overflows. | |
| OverflowResult | unsignedSubMayOverflow (const ConstantRange &Other) const |
| Return whether unsigned sub of the two ranges always/never overflows. | |
| OverflowResult | signedSubMayOverflow (const ConstantRange &Other) const |
| Return whether signed sub of the two ranges always/never overflows. | |
| OverflowResult | unsignedMulMayOverflow (const ConstantRange &Other) const |
| Return whether unsigned mul of the two ranges always/never overflows. | |
| KnownBits | toKnownBits () const |
| Return known bits for values in this range. | |
| void | print (raw_ostream &OS) const |
| Print out the bounds to a stream. | |
| void | dump () const |
| Allow printing from a debugger easily. | |
| Static Public Member Functions | |
|---|---|
| static ConstantRange | getEmpty (uint32_t BitWidth) |
| Create empty constant range with the given bit width. | |
| static ConstantRange | getFull (uint32_t BitWidth) |
| Create full constant range with the given bit width. | |
| static ConstantRange | getNonEmpty (APInt Lower, APInt Upper) |
| Create non-empty constant range with the given bounds. | |
| static ConstantRange | fromKnownBits (const KnownBits &Known, bool IsSigned) |
| Initialize a range based on a known bits constraint. | |
| 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. | |
| 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. | |
| 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. | |
| static bool | areInsensitiveToSignednessOfICmpPredicate (const ConstantRange &CR1, const ConstantRange &CR2) |
| Return true iff CR1 ult CR2 is equivalent to CR1 slt CR2. | |
| static bool | areInsensitiveToSignednessOfInvertedICmpPredicate (const ConstantRange &CR1, const ConstantRange &CR2) |
| Return true iff CR1 ult CR2 is equivalent to CR1 sge CR2. | |
| static CmpInst::Predicate | getEquivalentPredWithFlippedSignedness (CmpInst::Predicate Pred, const ConstantRange &CR1, const ConstantRange &CR2) |
| If the comparison between constant ranges this and Other is insensitive to the signedness of the comparison predicate, return a predicate equivalent to Pred, with flipped signedness (i.e. | |
| static ConstantRange | makeGuaranteedNoWrapRegion (Instruction::BinaryOps BinOp, const ConstantRange &Other, unsigned NoWrapKind) |
| Produce the largest range containing all X such that "X BinOp Y" is guaranteed not to wrap (overflow) for all Y in Other. | |
| static ConstantRange | makeExactNoWrapRegion (Instruction::BinaryOps BinOp, const APInt &Other, unsigned NoWrapKind) |
| Produce the range that contains X if and only if "X BinOp Other" does not wrap. | |
| static ConstantRange | makeMaskNotEqualRange (const APInt &Mask, const APInt &C) |
| Initialize a range containing all values X that satisfy (X & Mask) != C. | |
| static bool | isIntrinsicSupported (Intrinsic::ID IntrinsicID) |
| Returns true if ConstantRange calculations are supported for intrinsic with IntrinsicID. | |
| static ConstantRange | intrinsic (Intrinsic::ID IntrinsicID, ArrayRef< ConstantRange > Ops) |
| Compute range of intrinsic result for the given operand ranges. | |
This class represents a range of values.
Definition at line 47 of file ConstantRange.h.
◆ OverflowResult
Represents whether an operation on the given constant range is known to always or never overflow.
| Enumerator | |
|---|---|
| AlwaysOverflowsLow | Always overflows in the direction of signed/unsigned min value. |
| AlwaysOverflowsHigh | Always overflows in the direction of signed/unsigned max value. |
| MayOverflow | May or may not overflow. |
| NeverOverflows | Never overflows. |
Definition at line 567 of file ConstantRange.h.
◆ PreferredRangeType
If represented precisely, the result of some range operations may consist of multiple disjoint ranges.
As only a single range may be returned, any range covering these disjoint ranges constitutes a valid result, but some may be more useful than others depending on context. The preferred range type specifies whether a range that is non-wrapping in the unsigned or signed domain, or has the smallest size, is preferred. If a signedness is preferred but all ranges are non-wrapping or all wrapping, then the smallest set size is preferred. If there are multiple smallest sets, any one of them may be returned.
| Enumerator |
|---|
| Smallest |
| Unsigned |
| Signed |
Definition at line 327 of file ConstantRange.h.
| ConstantRange::ConstantRange ( uint32_t BitWidth, bool isFullSet ) | explicit |
|---|
Initialize a full or empty set for the specified bit width.
Definition at line 45 of file ConstantRange.cpp.
◆ ConstantRange() [2/3]
| ConstantRange::ConstantRange | ( | APInt | Value | ) |
|---|
Initialize a range to hold the single specified value.
Definition at line 49 of file ConstantRange.cpp.
◆ ConstantRange() [3/3]
| ConstantRange::ConstantRange | ( | APInt | Lower, |
|---|---|---|---|
| APInt | Upper | ||
| ) |
◆ abs()
Calculate absolute value range.
If the original range contains signed min, then the resulting range will contain signed min if and only if IntMinIsPoison is false.
Definition at line 1943 of file ConstantRange.cpp.
References getBitWidth(), getNonEmpty(), getSignedMax(), getSignedMin(), llvm::APInt::getSignedMinValue(), llvm::APInt::getZero(), isEmptySet(), isSignWrappedSet(), llvm::APInt::isStrictlyPositive(), llvm::Lo, llvm::SMax, llvm::SMin, llvm::APIntOps::umax(), and llvm::APIntOps::umin().
Referenced by processSRem().
◆ add()
◆ addWithNoWrap()
◆ areInsensitiveToSignednessOfICmpPredicate()
◆ areInsensitiveToSignednessOfInvertedICmpPredicate()
◆ ashr()
◆ binaryAnd()
◆ binaryNot()
◆ binaryOp()
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 935 of file ConstantRange.cpp.
References add(), ashr(), assert(), binaryAnd(), binaryOr(), binaryXor(), llvm::Instruction::isBinaryOp(), lshr(), multiply(), llvm::Other, sdiv(), shl(), srem(), sub(), udiv(), and urem().
Referenced by overflowingBinaryOp().
◆ binaryOr()
◆ binaryXor()
Return a new range representing the possible values resulting from a binary-xor of a value in this range by a value in Other.
Definition at line 1612 of file ConstantRange.cpp.
References binaryNot(), fromKnownBits(), getBitWidth(), getSingleElement(), intersectWith(), isEmptySet(), isSingleElement(), llvm::KnownBits::One, llvm::Other, sub(), toKnownBits(), Unsigned, and llvm::KnownBits::Zero.
Referenced by binaryOp().
◆ castOp()
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 778 of file ConstantRange.cpp.
References getBitWidth(), llvm::APInt::getMaxValue(), llvm::APInt::getMinValue(), getNonEmpty(), llvm::APInt::getSignedMaxValue(), llvm::APInt::getSignedMinValue(), llvm_unreachable, signExtend(), llvm::SMax, llvm::SMin, truncate(), zeroExtend(), and llvm::APInt::zext().
◆ contains() [1/2]
Return true if the specified value is in the set.
Definition at line 507 of file ConstantRange.cpp.
References isFullSet(), isUpperWrapped(), and llvm::APInt::ule().
Referenced by canScalarizeAccess(), cmpExcludesZero(), llvm::JumpThreadingPass::computeValueKnownInPredecessorsImpl(), llvm::copyRangeMetadata(), ctlz(), cttz(), foldCtpop(), llvm::ScalarEvolution::getMulExpr(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), getRangeForAffineARHelper(), llvm::ScalarEvolution::getSignExtendExprImpl(), llvm::ScalarEvolution::getTripCountFromExitCount(), llvm::ScalarEvolution::getZeroExtendExprImpl(), icmp(), llvm::is_contained(), llvm::RecurrenceDescriptor::isFindLastIVPattern(), llvm::SelectionDAG::isKnownNeverZero(), isKnownNonZero(), isKnownNonZeroFromOperator(), llvm::ValueLatticeElement::markConstantRange(), narrowSDivOrSRem(), processAbsIntrinsic(), processAShr(), processBinOp(), rangeMetadataExcludesValue(), sdiv(), simplifyICmpWithConstant(), simplifySwitchOnSelectUsingRanges(), SolveQuadraticAddRecRange(), splitGlobal(), and willNotOverflow().
◆ contains() [2/2]
◆ ctlz()
Calculate ctlz range.
If ZeroIsPoison is set, the range is computed ignoring a possible zero value contained in the input range.
Definition at line 1985 of file ConstantRange.cpp.
References contains(), llvm::countl_zero(), getBitWidth(), getLower(), getNonEmpty(), getUnsignedMax(), getUnsignedMin(), getUpper(), llvm::APInt::getZero(), isEmptySet(), and isZero().
◆ ctpop()
◆ cttz()
Calculate cttz range.
If ZeroIsPoison is set, the range is computed ignoring a possible zero value contained in the input range.
Definition at line 2045 of file ConstantRange.cpp.
References llvm::BitWidth, contains(), getBitWidth(), getNonEmpty(), getUnsignedCountTrailingZerosRange(), llvm::APInt::getZero(), isEmptySet(), isFullSet(), isWrappedSet(), llvm::APInt::isZero(), and unionWith().
◆ difference()
◆ dump()
◆ exactIntersectWith()
◆ exactUnionWith()
◆ fromKnownBits()
Initialize a range based on a known bits constraint.
The IsSigned flag indicates whether the constant range should not wrap in the signed or unsigned domain.
Definition at line 60 of file ConstantRange.cpp.
References llvm::APInt::clearSignBit(), llvm::KnownBits::getBitWidth(), llvm::KnownBits::getMaxValue(), llvm::KnownBits::getMinValue(), llvm::KnownBits::hasConflict(), llvm::KnownBits::isNegative(), llvm::KnownBits::isNonNegative(), and llvm::KnownBits::isUnknown().
Referenced by binaryAnd(), binaryOr(), binaryXor(), llvm::computeConstantRangeIncludingKnownBits(), llvm::SelectionDAG::computeOverflowForSignedSub(), llvm::SelectionDAG::computeOverflowForUnsignedAdd(), llvm::computeOverflowForUnsignedMul(), llvm::SelectionDAG::computeOverflowForUnsignedMul(), llvm::SelectionDAG::computeOverflowForUnsignedSub(), llvm::SelectionDAG::getValidShiftAmountRange(), llvm::CombinerHelper::matchAddOverflow(), and llvm::CombinerHelper::matchSuboCarryOut().
◆ getActiveBits()
| unsigned ConstantRange::getActiveBits | ( | ) | const |
|---|
◆ getBitWidth()
| uint32_t llvm::ConstantRange::getBitWidth ( ) const | inline |
|---|
Get the bit width of this ConstantRange.
Definition at line 209 of file ConstantRange.h.
Referenced by abs(), binaryNot(), binaryXor(), castOp(), llvm::SelectionDAG::ComputeNumSignBits(), computeNumSignBitsFromRangeMetadata(), computeOverflowForSignedAdd(), ctlz(), ctpop(), cttz(), emitConstantRange(), llvm::Attribute::getAsString(), getDomain(), getEquivalentICmp(), getRangeForAffineARHelper(), getSignedMax(), getSignedMin(), getUnsignedMax(), getUnsignedMin(), llvm::ConstantRangeList::insert(), intersectWith(), llvm::SelectionDAG::isKnownNeverZero(), isKnownNonZero(), isKnownNonZeroFromOperator(), isSizeLargerThan(), isSizeStrictlySmallerThan(), makeAllowedICmpRegion(), multiply(), multiplyWithNoWrap(), sdiv(), sextOrTrunc(), shl(), signedAddMayOverflow(), signedSubMayOverflow(), signExtend(), srem(), subtract(), llvm::ConstantRangeList::subtract(), toKnownBits(), truncate(), llvm::AttributeFuncs::typeIncompatible(), unionWith(), urem(), zeroExtend(), and zextOrTrunc().
◆ getEmpty()
◆ getEquivalentICmp() [1/2]
◆ getEquivalentICmp() [2/2]
Set up Pred, RHS and Offset such that (V + Offset) Pred RHS is true iff V is in the range.
Prefers using Offset == 0 if possible.
Definition at line 206 of file ConstantRange.cpp.
References add(), assert(), getBitWidth(), getLower(), getSingleElement(), getSingleMissingElement(), getUpper(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGE, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_ULT, isEmptySet(), isFullSet(), llvm::APInt::isMinSignedValue(), makeExactICmpRegion(), llvm::Offset, and RHS.
◆ getEquivalentPredWithFlippedSignedness()
If the comparison between constant ranges this and Other is insensitive to the signedness of the comparison predicate, return a predicate equivalent to Pred, with flipped signedness (i.e.
unsigned instead of signed or vice versa), and maybe inverted, otherwise returns CmpInst::Predicate::BAD_ICMP_PREDICATE.
Definition at line 188 of file ConstantRange.cpp.
References areInsensitiveToSignednessOfICmpPredicate(), areInsensitiveToSignednessOfInvertedICmpPredicate(), assert(), llvm::CmpInst::BAD_ICMP_PREDICATE, llvm::ICmpInst::getFlippedSignednessPredicate(), llvm::CmpInst::getInversePredicate(), llvm::CmpInst::isIntPredicate(), and llvm::CmpInst::isRelational().
Referenced by processICmp().
◆ getFull()
◆ getLower()
| const APInt & llvm::ConstantRange::getLower ( ) const | inline |
|---|
Return the lower value for this range.
Definition at line 203 of file ConstantRange.h.
Referenced by add(), ctlz(), emitConstantRange(), llvm::Attribute::get(), llvm::Attribute::getAsString(), getEquivalentICmp(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), getRangeForAffineARHelper(), getSignedMin(), getUnsignedMin(), llvm::ConstantRangeList::insert(), llvm::ConstantRangeList::intersectWith(), llvm::ConstantRangeList::isOrderedRanges(), lowerKernelArguments(), makeAllowedICmpRegion(), llvm::operator<<(), llvm::ConstantRangeList::print(), llvm::AttributeImpl::Profile(), SolveQuadraticAddRecRange(), splitGlobal(), sub(), llvm::ConstantRangeList::subtract(), llvm::ConstantRangeList::unionWith(), and writeFunctionTypeMetadataRecords().
◆ getMinSignedBits()
| unsigned ConstantRange::getMinSignedBits | ( | ) | const |
|---|
◆ getNonEmpty()
Create non-empty constant range with the given bounds.
If Lower and Upper are the same, a full range is returned.
Definition at line 84 of file ConstantRange.h.
References llvm::Upper.
Referenced by abs(), ashr(), binaryAnd(), binaryOr(), castOp(), llvm::computeConstantRange(), computeShlNSWWithNegLHS(), computeShlNSWWithNNegLHS(), computeShlNUW(), ctlz(), ctpop(), cttz(), getRangeForAffineARHelper(), getRangeForIntrinsic(), getRangeForSelectPattern(), getValueFromICmpCtpop(), llvm::RecurrenceDescriptor::isFindLastIVPattern(), lshr(), makeAllowedICmpRegion(), makeExactMulNSWRegion(), makeExactMulNUWRegion(), makeGuaranteedNoWrapRegion(), makeMaskNotEqualRange(), multiplyWithNoWrap(), sadd_sat(), shl(), smax(), smin(), smul_fast(), smul_sat(), sshl_sat(), ssub_sat(), uadd_sat(), udiv(), umax(), umin(), umul_sat(), unionWithMinMaxIntrinsicClamp(), urem(), ushl_sat(), and usub_sat().
◆ getSignedMax()
| APInt ConstantRange::getSignedMax | ( | ) | const |
|---|
Return the largest signed value contained in the ConstantRange.
Definition at line 495 of file ConstantRange.cpp.
References getBitWidth(), llvm::APInt::getSignedMaxValue(), getUpper(), isFullSet(), and isUpperSignWrapped().
Referenced by abs(), ashr(), llvm::SelectionDAG::ComputeNumSignBits(), computeNumSignBitsFromRangeMetadata(), getMinSignedBits(), llvm::ScalarEvolution::getSignedRangeMax(), icmp(), makeAllowedICmpRegion(), multiply(), processAbsIntrinsic(), sadd_sat(), signedAddMayOverflow(), signedSubMayOverflow(), smax(), smin(), smul_fast(), smul_sat(), srem(), sshl_sat(), ssub_sat(), and stripAndAccumulateOffsets().
◆ getSignedMin()
| APInt ConstantRange::getSignedMin | ( | ) | const |
|---|
Return the smallest signed value contained in the ConstantRange.
Definition at line 501 of file ConstantRange.cpp.
References getBitWidth(), getLower(), llvm::APInt::getSignedMinValue(), isFullSet(), and isSignWrappedSet().
Referenced by abs(), ashr(), computeKnownFPClass(), llvm::SelectionDAG::ComputeNumSignBits(), computeNumSignBitsFromRangeMetadata(), getMinSignedBits(), llvm::ScalarEvolution::getSignedRangeMin(), icmp(), makeAllowedICmpRegion(), multiply(), multiplyWithNoWrap(), sadd_sat(), signedAddMayOverflow(), signedSubMayOverflow(), smax(), smin(), smul_fast(), smul_sat(), srem(), sshl_sat(), ssub_sat(), and stripAndAccumulateOffsets().
◆ getSingleElement()
| const APInt * llvm::ConstantRange::getSingleElement ( ) const | inline |
|---|
If this set contains a single element, return it, otherwise return null.
Definition at line 251 of file ConstantRange.h.
References llvm::Upper.
Referenced by llvm::ValueLatticeElement::asConstantInteger(), binaryXor(), computeKnownFPClass(), llvm::InstCombinerImpl::foldICmpWithDominatingICmp(), llvm::AAValueConstantRange::getAssumedConstant(), llvm::SCCPInstVisitor::getConstant(), llvm::LazyValueInfo::getConstant(), llvm::LazyValueInfo::getConstantOnEdge(), getEquivalentICmp(), llvm::SelectionDAG::getVScale(), icmp(), multiply(), processSDiv(), simplifyIntrinsic(), srem(), and urem().
◆ getSingleMissingElement()
| const APInt * llvm::ConstantRange::getSingleMissingElement ( ) const | inline |
|---|
◆ getUnsignedMax()
| APInt ConstantRange::getUnsignedMax | ( | ) | const |
|---|
Return the largest unsigned value contained in the ConstantRange.
Definition at line 483 of file ConstantRange.cpp.
References getBitWidth(), llvm::APInt::getMaxValue(), getUpper(), isFullSet(), and isUpperWrapped().
Referenced by llvm::SCEVAAResult::alias(), binaryAnd(), llvm::SelectionDAG::computeKnownBits(), computeKnownBitsFromOperator(), llvm::computeKnownBitsFromRangeMetadata(), ctlz(), getActiveBits(), llvm::AArch64TargetMachine::getSubtargetImpl(), llvm::ScalarEvolution::getUnsignedRangeMax(), getValueFromICmpCtpop(), icmp(), lshr(), makeAllowedICmpRegion(), makeGuaranteedNoWrapRegion(), multiply(), mustBeFiniteCountedLoop(), processAnd(), shl(), srem(), subWithNoWrap(), toKnownBits(), uadd_sat(), udiv(), umax(), umin(), umul_sat(), unsignedAddMayOverflow(), unsignedMulMayOverflow(), unsignedSubMayOverflow(), urem(), ushl_sat(), and usub_sat().
◆ getUnsignedMin()
| APInt ConstantRange::getUnsignedMin | ( | ) | const |
|---|
Return the smallest unsigned value contained in the ConstantRange.
Definition at line 489 of file ConstantRange.cpp.
References getBitWidth(), getLower(), llvm::APInt::getMinValue(), isFullSet(), and isWrappedSet().
Referenced by llvm::SCEVAAResult::alias(), binaryOr(), llvm::computeKnownBitsFromRangeMetadata(), ctlz(), llvm::AArch64TargetMachine::getSubtargetImpl(), llvm::ScalarEvolution::getUnsignedRangeMin(), getValueFromICmpCtpop(), icmp(), lshr(), makeAllowedICmpRegion(), multiply(), shl(), srem(), toKnownBits(), uadd_sat(), udiv(), umax(), umin(), umul_sat(), unsignedAddMayOverflow(), unsignedMulMayOverflow(), unsignedSubMayOverflow(), ushl_sat(), and usub_sat().
◆ getUpper()
| const APInt & llvm::ConstantRange::getUpper ( ) const | inline |
|---|
Return the upper value for this range.
Definition at line 206 of file ConstantRange.h.
References llvm::Upper.
Referenced by add(), ctlz(), emitConstantRange(), llvm::Attribute::get(), llvm::Attribute::getAsString(), getEquivalentICmp(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), getRangeForAffineARHelper(), getSignedMax(), getUnsignedMax(), llvm::ConstantRangeList::insert(), llvm::ConstantRangeList::intersectWith(), llvm::ConstantRangeList::isOrderedRanges(), lowerKernelArguments(), makeAllowedICmpRegion(), multiply(), llvm::operator<<(), llvm::ConstantRangeList::print(), llvm::AttributeImpl::Profile(), SolveQuadraticAddRecRange(), splitGlobal(), sub(), llvm::ConstantRangeList::subtract(), switchToLookupTable(), llvm::ConstantRangeList::unionWith(), and writeFunctionTypeMetadataRecords().
◆ icmp()
Does the predicate Pred hold between ranges this and Other? NOTE: false does not mean that inverse predicate holds!
Definition at line 243 of file ConstantRange.cpp.
References contains(), getSignedMax(), getSignedMin(), getSingleElement(), getUnsignedMax(), getUnsignedMin(), 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, inverse(), isEmptySet(), llvm_unreachable, llvm::Other, llvm::APInt::sge(), llvm::APInt::sgt(), llvm::APInt::sle(), llvm::APInt::slt(), llvm::APInt::uge(), llvm::APInt::ugt(), llvm::APInt::ule(), and llvm::APInt::ult().
Referenced by expandUDivOrURem(), getDomain(), getPredicateResult(), isImpliedCondCommonOperandWithCR(), processAbsIntrinsic(), processCmpIntrinsic(), processMinMaxIntrinsic(), processSRem(), and llvm::InstCombinerImpl::visitCallInst().
◆ intersectWith()
Return the range that results from the intersection of this range with another range.
If the intersection is disjoint, such that two results are possible, the preferred range is determined by the PreferredRangeType.
Definition at line 581 of file ConstantRange.cpp.
References assert(), getBitWidth(), getPreferredRange(), intersectWith(), isEmptySet(), isFullSet(), isUpperWrapped(), llvm::APInt::ule(), and llvm::APInt::ult().
Referenced by AddParamAndFnBasicAttributes(), AddReturnAttributes(), areNonOverlapSameBaseLoadAndStore(), binaryAnd(), binaryOr(), binaryXor(), llvm::computeConstantRange(), llvm::computeConstantRangeIncludingKnownBits(), difference(), exactIntersectWith(), exactUnionWith(), foldCtpop(), llvm::InstCombinerImpl::foldICmpWithDominatingICmp(), llvm::inferAttribute(), llvm::ARMTTIImpl::instCombineIntrinsic(), llvm::ValueLatticeElement::intersect(), llvm::IntegerRangeState::intersectKnown(), intersectWith(), makeGuaranteedNoWrapRegion(), sdiv(), shlWithNoWrap(), smax(), smin(), umax(), umin(), and llvm::IntegerRangeState::unionAssumed().
◆ intrinsic()
◆ inverse()
◆ isAllNegative()
| bool ConstantRange::isAllNegative | ( | ) | const |
|---|
◆ isAllNonNegative()
| bool ConstantRange::isAllNonNegative | ( | ) | const |
|---|
Return true if all values in this range are non-negative.
Definition at line 468 of file ConstantRange.cpp.
References llvm::APInt::isNonNegative(), and isSignWrappedSet().
Referenced by areInsensitiveToSignednessOfICmpPredicate(), areInsensitiveToSignednessOfInvertedICmpPredicate(), computeKnownFPClass(), computeOverflowForSignedAdd(), getDomain(), processAShr(), processPossibleNonNeg(), processSExt(), processSIToFP(), and llvm::refineInstruction().
◆ isAllPositive()
| bool ConstantRange::isAllPositive | ( | ) | const |
|---|
◆ isEmptySet()
| bool ConstantRange::isEmptySet | ( | ) | const |
|---|
Return true if this set contains no members.
Definition at line 418 of file ConstantRange.cpp.
References llvm::APInt::isMinValue().
Referenced by abs(), add(), addWithNoWrap(), areInsensitiveToSignednessOfICmpPredicate(), areInsensitiveToSignednessOfInvertedICmpPredicate(), areNonOverlapSameBaseLoadAndStore(), ashr(), binaryAnd(), binaryOr(), binaryXor(), contains(), ctlz(), ctpop(), cttz(), llvm::InstCombinerImpl::foldICmpWithDominatingICmp(), getActiveBits(), llvm::AAValueConstantRange::getAssumedConstant(), getEquivalentICmp(), getMinSignedBits(), llvm::ValueLatticeElement::getRange(), icmp(), llvm::ConstantRangeList::insert(), intersectWith(), inverse(), isAllNegative(), isAllPositive(), lshr(), makeAllowedICmpRegion(), makeGuaranteedNoWrapRegion(), llvm::ValueLatticeElement::markConstantRange(), multiply(), multiplyWithNoWrap(), print(), sadd_sat(), sdiv(), shl(), shlWithNoWrap(), signedAddMayOverflow(), signedSubMayOverflow(), signExtend(), llvm::ScalarEvolution::SimplifyICmpOperands(), simplifyICmpWithConstant(), smax(), smin(), smul_fast(), smul_sat(), srem(), sshl_sat(), ssub_sat(), sub(), llvm::ConstantRangeList::subtract(), subWithNoWrap(), toKnownBits(), truncate(), uadd_sat(), udiv(), umax(), umin(), umul_sat(), unionWith(), unsignedAddMayOverflow(), unsignedMulMayOverflow(), unsignedSubMayOverflow(), urem(), ushl_sat(), usub_sat(), and zeroExtend().
◆ isFullSet()
| bool ConstantRange::isFullSet | ( | ) | const |
|---|
Return true if this set contains all of the elements possible for this data-type.
Definition at line 414 of file ConstantRange.cpp.
References llvm::APInt::isMaxValue().
Referenced by add(), llvm::AttrBuilder::addConstantRangeAttr(), addWithNoWrap(), contains(), ctpop(), cttz(), llvm::Attribute::get(), getEquivalentICmp(), llvm::MDNode::getMostGenericRange(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), llvm::ValueLatticeElement::getRange(), getRangeForAffineARHelper(), getSignedMax(), getSignedMin(), getUnsignedMax(), getUnsignedMin(), llvm::ConstantRangeList::insert(), intersectWith(), llvm::AttributeSet::intersectWith(), inverse(), isAllNegative(), isAllPositive(), isSizeLargerThan(), isSizeStrictlySmallerThan(), llvm::IntegerRangeState::isValidState(), llvm::ValueLatticeElement::markConstantRange(), multiplyWithNoWrap(), print(), signExtend(), llvm::ScalarEvolution::SimplifyICmpOperands(), simplifyICmpWithConstant(), stripAndAccumulateOffsets(), sub(), llvm::ConstantRangeList::subtract(), subWithNoWrap(), truncate(), unionWith(), llvm::InstCombinerImpl::visitCallInst(), and zeroExtend().
◆ isIntrinsicSupported()
◆ isSignWrappedSet()
| bool ConstantRange::isSignWrappedSet | ( | ) | const |
|---|
Return true if this set wraps around the signed domain.
Special cases:
- Empty set: Not wrapped.
- Full set: Not wrapped.
- [X, SignedMin) == [X, SignedMax]: Not wrapped.
Definition at line 430 of file ConstantRange.cpp.
References llvm::APInt::isMinSignedValue(), and llvm::APInt::sgt().
Referenced by abs(), getPreferredRange(), getSignedMin(), isAllNonNegative(), isAllPositive(), signExtend(), smax(), and smin().
◆ isSingleElement()
| bool llvm::ConstantRange::isSingleElement ( ) const | inline |
|---|
◆ isSizeLargerThan()
| bool ConstantRange::isSizeLargerThan | ( | uint64_t | MaxSize | ) | const |
|---|
◆ isSizeStrictlySmallerThan()
◆ isUpperSignWrapped()
| bool ConstantRange::isUpperSignWrapped | ( | ) | const |
|---|
◆ isUpperWrapped()
| bool ConstantRange::isUpperWrapped | ( | ) | const |
|---|
◆ isWrappedSet()
| bool ConstantRange::isWrappedSet | ( | ) | const |
|---|
◆ lshr()
◆ makeAllowedICmpRegion()
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 98 of file ConstantRange.cpp.
References getBitWidth(), getLower(), llvm::APInt::getMinValue(), getNonEmpty(), getSignedMax(), getSignedMin(), llvm::APInt::getSignedMinValue(), getUnsignedMax(), getUnsignedMin(), getUpper(), llvm::APInt::getZero(), 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(), llvm_unreachable, llvm::SMax, llvm::SMin, llvm::UMax, and llvm::UMin.
Referenced by llvm::computeConstantRange(), computeKnownBitsFromCmp(), isImpliedCondCommonOperandWithCR(), makeExactICmpRegion(), and makeSatisfyingICmpRegion().
◆ makeExactICmpRegion()
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 158 of file ConstantRange.cpp.
References assert(), llvm::CallingConv::C, makeAllowedICmpRegion(), and makeSatisfyingICmpRegion().
Referenced by cmpExcludesZero(), computeKnownBitsFromOperator(), llvm::JumpThreadingPass::computeValueKnownInPredecessorsImpl(), llvm::InstCombinerImpl::foldICmpAddConstant(), foldICmpUSubSatOrUAddSatWithConstant(), llvm::InstCombinerImpl::foldICmpWithDominatingICmp(), getEquivalentICmp(), getValueFromICmpCtpop(), llvm::isKnownInversion(), simplifyAndOrOfICmpsWithConstants(), llvm::ScalarEvolution::SimplifyICmpOperands(), simplifyICmpWithConstant(), and simplifySwitchOnSelectUsingRanges().
◆ makeExactNoWrapRegion()
◆ makeGuaranteedNoWrapRegion()
Produce the largest range containing all X such that "X BinOp Y" is guaranteed not to wrap (overflow) for all Y in Other.
However, there may be some Y in Other for which additional X not contained in the result also do not overflow.
NoWrapKind must be one of OBO::NoUnsignedWrap or OBO::NoSignedWrap.
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, 6), OBO::NoSignedWrap) == [INT_MIN+1, INT_MAX-4) MGNR(Sub, [i8 1, 2), OBO::NoSignedWrap) == [-127, 128) MGNR(Sub, [i8 1, 2), OBO::NoUnsignedWrap) == [1, 0)
Definition at line 315 of file ConstantRange.cpp.
References ashr(), assert(), llvm::BitWidth, llvm::CallingConv::C, llvm::APInt::getMaxValue(), llvm::APInt::getMinValue(), getNonEmpty(), llvm::APInt::getSignedMaxValue(), llvm::APInt::getSignedMinValue(), getUnsignedMax(), llvm::APInt::getZero(), intersectWith(), llvm::Instruction::isBinaryOp(), isEmptySet(), llvm_unreachable, lshr(), makeExactMulNSWRegion(), makeExactMulNUWRegion(), llvm::Other, llvm::SMax, llvm::SMin, and Unsigned.
Referenced by llvm::ScalarEvolution::getMulExpr(), makeExactNoWrapRegion(), processBinOp(), llvm::refineInstruction(), StrengthenNoWrapFlags(), and willNotOverflow().
◆ makeMaskNotEqualRange()
◆ makeSatisfyingICmpRegion()
◆ multiply()
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 1164 of file ConstantRange.cpp.
References A, B, llvm::CallingConv::C, getBitWidth(), getSignedMax(), getSignedMin(), getSingleElement(), getUnsignedMax(), getUnsignedMin(), getUpper(), llvm::APInt::getZero(), isEmptySet(), llvm::APInt::isMinSignedValue(), llvm::APInt::isNonNegative(), isSizeStrictlySmallerThan(), isUpperWrapped(), llvm::Other, llvm::APInt::sext(), sub(), truncate(), and llvm::APInt::zext().
Referenced by binaryOp(), llvm::SelectionDAG::computeKnownBits(), llvm::SelectionDAG::isKnownNeverZero(), and multiplyWithNoWrap().
◆ multiplyWithNoWrap()
Return a new range representing the possible values resulting from a multiplication with wrap type NoWrapKind of a value in this range and a value in Other.
If the result range is disjoint, the preferred range is determined by the PreferredRangeType.
Definition at line 1232 of file ConstantRange.cpp.
References getBitWidth(), getNonEmpty(), getSignedMin(), llvm::APInt::getSignedMinValue(), llvm::APInt::getZero(), isEmptySet(), isFullSet(), multiply(), llvm::OverflowingBinaryOperator::NoSignedWrap, llvm::OverflowingBinaryOperator::NoUnsignedWrap, llvm::Other, smul_sat(), and umul_sat().
Referenced by overflowingBinaryOp().
◆ operator!=()
◆ operator==()
◆ overflowingBinaryOp()
◆ print()
◆ sadd_sat()
◆ sdiv()
Return a new range representing the possible values resulting from a signed division of a value in this range and a value in Other.
Division by zero and division of SignedMin by -1 are considered undefined behavior, in line with IR, and do not contribute towards the result.
Definition at line 1358 of file ConstantRange.cpp.
References contains(), getBitWidth(), llvm::APInt::getSignedMinValue(), llvm::APInt::getZero(), intersectWith(), llvm::APInt::isAllOnes(), isEmptySet(), llvm::APInt::isMinSignedValue(), llvm::APInt::isZero(), llvm::Lo, RHS, llvm::APInt::sdiv(), sdiv(), Signed, and unionWith().
Referenced by binaryOp(), processSDiv(), and sdiv().
◆ sextOrTrunc()
◆ shl()
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 1645 of file ConstantRange.cpp.
References llvm::APInt::countl_one(), llvm::countl_zero(), llvm::APInt::getBitsSetFrom(), getBitWidth(), getNonEmpty(), getUnsignedMax(), getUnsignedMin(), llvm::APInt::getZero(), isAllNegative(), isEmptySet(), llvm::Other, RHS, llvm::APInt::ugt(), and llvm::APInt::ule().
Referenced by binaryOp(), and shlWithNoWrap().
◆ shlWithNoWrap()
◆ signedAddMayOverflow()
Return whether signed add of the two ranges always/never overflows.
Definition at line 2153 of file ConstantRange.cpp.
References AlwaysOverflowsHigh, AlwaysOverflowsLow, getBitWidth(), getSignedMax(), llvm::APInt::getSignedMaxValue(), getSignedMin(), llvm::APInt::getSignedMinValue(), isEmptySet(), llvm::APInt::isNegative(), llvm::APInt::isNonNegative(), MayOverflow, NeverOverflows, llvm::Other, llvm::APInt::sgt(), and llvm::APInt::slt().
Referenced by computeOverflowForSignedAdd(), and llvm::CombinerHelper::matchAddOverflow().
◆ signedSubMayOverflow()
Return whether signed sub of the two ranges always/never overflows.
Definition at line 2199 of file ConstantRange.cpp.
References AlwaysOverflowsHigh, AlwaysOverflowsLow, getBitWidth(), getSignedMax(), llvm::APInt::getSignedMaxValue(), getSignedMin(), llvm::APInt::getSignedMinValue(), isEmptySet(), llvm::APInt::isNegative(), llvm::APInt::isNonNegative(), MayOverflow, NeverOverflows, llvm::Other, llvm::APInt::sgt(), and llvm::APInt::slt().
Referenced by llvm::computeOverflowForSignedSub(), llvm::SelectionDAG::computeOverflowForSignedSub(), and llvm::CombinerHelper::matchSuboCarryOut().
◆ 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.
Definition at line 846 of file ConstantRange.cpp.
References assert(), getBitWidth(), llvm::APInt::getHighBitsSet(), llvm::APInt::getLowBitsSet(), isEmptySet(), isFullSet(), llvm::APInt::isMinSignedValue(), isSignWrappedSet(), llvm::APInt::sext(), and llvm::APInt::zext().
Referenced by castOp(), llvm::SelectionDAG::ComputeNumSignBits(), computeNumSignBitsFromRangeMetadata(), llvm::ScalarEvolution::getSignExtendExprImpl(), and sextOrTrunc().
◆ smax()
◆ smin()
◆ smul_fast()
◆ smul_sat()
◆ srem()
Return a new range representing the possible values resulting from a signed remainder operation of a value in this range and a value in Other.
Definition at line 1468 of file ConstantRange.cpp.
References getBitWidth(), getSignedMax(), getSignedMin(), getSingleElement(), getUnsignedMax(), getUnsignedMin(), llvm::APInt::getZero(), isEmptySet(), llvm::APInt::isNonNegative(), llvm::APInt::isZero(), RHS, llvm::APInt::ugt(), llvm::APIntOps::umax(), llvm::APIntOps::umin(), and llvm::Upper.
Referenced by binaryOp().
◆ sshl_sat()
◆ ssub_sat()
◆ sub()
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 1114 of file ConstantRange.cpp.
References getLower(), getUpper(), isEmptySet(), isFullSet(), llvm::Other, and X.
Referenced by binaryNot(), binaryOp(), binaryXor(), computeKnownBitsFromCmp(), foldICmpUSubSatOrUAddSatWithConstant(), multiply(), and subWithNoWrap().
◆ subtract()
◆ subWithNoWrap()
◆ toKnownBits()
| KnownBits ConstantRange::toKnownBits | ( | ) | const |
|---|
Return known bits for values in this range.
Definition at line 80 of file ConstantRange.cpp.
References llvm::APInt::clearLowBits(), getBitWidth(), llvm::APIntOps::GetMostSignificantDifferentBit(), getUnsignedMax(), getUnsignedMin(), isEmptySet(), llvm::KnownBits::makeConstant(), llvm::KnownBits::One, and llvm::KnownBits::Zero.
Referenced by binaryAnd(), binaryOr(), binaryXor(), computeKnownBits(), llvm::SelectionDAG::computeKnownBits(), computeKnownBitsFromCmp(), and computeKnownBitsFromOperator().
◆ 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.
Definition at line 864 of file ConstantRange.cpp.
References assert(), llvm::APInt::clearBit(), llvm::APInt::countr_one(), llvm::APInt::getActiveBits(), llvm::APInt::getBitsSetFrom(), getBitWidth(), llvm::APInt::getMaxValue(), isEmptySet(), isFullSet(), isUpperWrapped(), llvm::APInt::setAllBits(), llvm::APInt::trunc(), llvm::APInt::ult(), and unionWith().
Referenced by castOp(), llvm::InstCombinerImpl::foldICmpAddConstant(), llvm::ScalarEvolution::getSignExtendExprImpl(), llvm::ScalarEvolution::getZeroExtendExprImpl(), multiply(), sextOrTrunc(), and zextOrTrunc().
◆ uadd_sat()
◆ udiv()
◆ umax()
◆ umin()
◆ umul_sat()
◆ 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 687 of file ConstantRange.cpp.
References assert(), getBitWidth(), getPreferredRange(), isEmptySet(), isFullSet(), isUpperWrapped(), llvm::APInt::uge(), llvm::APInt::ugt(), llvm::APInt::ule(), llvm::APInt::ult(), and unionWith().
Referenced by llvm::computeConstantRange(), computeShlNSW(), ctpop(), cttz(), exactIntersectWith(), exactUnionWith(), llvm::getConstantRangeFromMetadata(), llvm::AttributeSet::intersectWith(), llvm::IntegerRangeState::operator&=(), sdiv(), smax(), smin(), llvm::Constant::toConstantRange(), truncate(), tryMergeRange(), umax(), umin(), llvm::IntegerRangeState::unionAssumed(), and unionWith().
◆ unsignedAddMayOverflow()
◆ unsignedMulMayOverflow()
◆ unsignedSubMayOverflow()
◆ urem()
◆ ushl_sat()
◆ usub_sat()
◆ 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.
Definition at line 829 of file ConstantRange.cpp.
References assert(), getBitWidth(), llvm::APInt::getOneBitSet(), isEmptySet(), isFullSet(), isUpperWrapped(), and llvm::APInt::zext().
Referenced by castOp(), llvm::SelectionDAG::ComputeNumSignBits(), computeNumSignBitsFromRangeMetadata(), llvm::ScalarEvolution::getZeroExtendExprImpl(), and zextOrTrunc().
◆ zextOrTrunc()
The documentation for this class was generated from the following files:
- include/llvm/IR/ConstantRange.h
- lib/IR/ConstantRange.cpp