forked from OSchip/llvm-project
[MLIR][Presburger] Add support for piece-wise multi-affine functions
Add the class MultiAffineFunction which represents functions whose domain is an IntegerPolyhedron and which produce an output given by a tuple of affine expressions in the IntegerPolyhedron's ids. Also add support for piece-wise MultiAffineFunctions, which are defined on a union of IntegerPolyhedrons, and may have different output affine expressions on each IntegerPolyhedron. Thus the function is affine on each individual IntegerPolyhedron piece in the domain. This is part of a series of patches leading up to parametric integer programming. Depends on D118778. Reviewed By: Groverkss Differential Revision: https://reviews.llvm.org/D118779
This commit is contained in:
Arjun P
parent
570471199b
commit
d5a2944219
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@ -56,6 +56,7 @@ public:
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enum class Kind {
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FlatAffineConstraints,
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FlatAffineValueConstraints,
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MultiAffineFunction,
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IntegerPolyhedron
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};
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@ -194,6 +195,11 @@ public:
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/// Adds an equality from the coefficients specified in `eq`.
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void addEquality(ArrayRef<int64_t> eq);
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/// Eliminate the `posB^th` local identifier, replacing every instance of it
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/// with the `posA^th` local identifier. This should be used when the two
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/// local variables are known to always take the same values.
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virtual void eliminateRedundantLocalId(unsigned posA, unsigned posB);
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/// Removes identifiers of the specified kind with the specified pos (or
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/// within the specified range) from the system. The specified location is
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/// relative to the first identifier of the specified kind.
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@ -273,6 +279,9 @@ public:
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/// Returns true if the given point satisfies the constraints, or false
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/// otherwise.
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///
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/// Note: currently, if the polyhedron contains local ids, the values of
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/// the local ids must also be provided.
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bool containsPoint(ArrayRef<int64_t> point) const;
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/// Find equality and pairs of inequality contraints identified by their
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@ -0,0 +1,195 @@
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//===- PWMAFunction.h - MLIR PWMAFunction Class------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Support for piece-wise multi-affine functions. These are functions that are
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// defined on a domain that is a union of IntegerPolyhedrons, and on each domain
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// the value of the function is a tuple of integers, with each value in the
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// tuple being an affine expression in the ids of the IntegerPolyhedron.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_ANALYSIS_PRESBURGER_PWMAFUNCTION_H
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#define MLIR_ANALYSIS_PRESBURGER_PWMAFUNCTION_H
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#include "mlir/Analysis/Presburger/IntegerPolyhedron.h"
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#include "mlir/Analysis/Presburger/PresburgerSet.h"
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namespace mlir {
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/// This class represents a multi-affine function whose domain is given by an
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/// IntegerPolyhedron. This can be thought of as an IntegerPolyhedron with a
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/// tuple of integer values attached to every point in the polyhedron, with the
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/// value of each element of the tuple given by an affine expression in the ids
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/// of the polyhedron. For example we could have the domain
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///
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/// (x, y) : (x >= 5, y >= x)
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///
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/// and a tuple of three integers defined at every point in the polyhedron:
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///
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/// (x, y) -> (x + 2, 2*x - 3y + 5, 2*x + y).
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///
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/// In this way every point in the polyhedron has a tuple of integers associated
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/// with it. If the integer polyhedron has local ids, then the output
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/// expressions can use them as well. The output expressions are represented as
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/// a matrix with one row for every element in the output vector one column for
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/// each id, and an extra column at the end for the constant term.
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///
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/// Checking equality of two such functions is supported, as well as finding the
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/// value of the function at a specified point. Note that local ids in the
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/// domain are not yet supported for finding the value at a point.
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class MultiAffineFunction : protected IntegerPolyhedron {
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public:
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/// We use protected inheritance to avoid inheriting the whole public
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/// interface of IntegerPolyhedron. These using declarations explicitly make
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/// only the relevant functions part of the public interface.
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using IntegerPolyhedron::getNumDimAndSymbolIds;
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using IntegerPolyhedron::getNumDimIds;
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using IntegerPolyhedron::getNumIds;
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using IntegerPolyhedron::getNumLocalIds;
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using IntegerPolyhedron::getNumSymbolIds;
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MultiAffineFunction(const IntegerPolyhedron &domain, const Matrix &output)
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: IntegerPolyhedron(domain), output(output) {}
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MultiAffineFunction(const Matrix &output, unsigned numDims,
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unsigned numSymbols = 0, unsigned numLocals = 0)
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: IntegerPolyhedron(numDims, numSymbols, numLocals), output(output) {}
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~MultiAffineFunction() override = default;
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Kind getKind() const override { return Kind::MultiAffineFunction; }
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bool classof(const IntegerPolyhedron *poly) const {
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return poly->getKind() == Kind::MultiAffineFunction;
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}
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unsigned getNumInputs() const { return getNumDimAndSymbolIds(); }
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unsigned getNumOutputs() const { return output.getNumRows(); }
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bool isConsistent() const { return output.getNumColumns() == numIds + 1; }
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const IntegerPolyhedron &getDomain() const { return *this; }
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bool hasCompatibleDimensions(const MultiAffineFunction &f) const;
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/// Insert `num` identifiers of the specified kind at position `pos`.
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/// Positions are relative to the kind of identifier. The coefficient columns
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/// corresponding to the added identifiers are initialized to zero. Return the
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/// absolute column position (i.e., not relative to the kind of identifier)
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/// of the first added identifier.
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unsigned insertId(IdKind kind, unsigned pos, unsigned num = 1) override;
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/// Swap the posA^th identifier with the posB^th identifier.
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void swapId(unsigned posA, unsigned posB) override;
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/// Remove the specified range of ids.
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void removeIdRange(unsigned idStart, unsigned idLimit) override;
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/// Eliminate the `posB^th` local identifier, replacing every instance of it
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/// with the `posA^th` local identifier. This should be used when the two
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/// local variables are known to always take the same values.
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void eliminateRedundantLocalId(unsigned posA, unsigned posB) override;
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/// Return whether the outputs of `this` and `other` agree wherever both
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/// functions are defined, i.e., the outputs should be equal for all points in
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/// the intersection of the domains.
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bool isEqualWhereDomainsOverlap(MultiAffineFunction other) const;
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/// Return whether the `this` and `other` are equal. This is the case if
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/// they lie in the same space, i.e. have the same dimensions, and their
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/// domains are identical and their outputs are equal on their domain.
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bool isEqual(const MultiAffineFunction &other) const;
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/// Get the value of the function at the specified point. If the point lies
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/// outside the domain, an empty optional is returned.
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///
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/// Note: domains with local ids are not yet supported, and will assert-fail.
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Optional<SmallVector<int64_t, 8>> valueAt(ArrayRef<int64_t> point) const;
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void print(raw_ostream &os) const;
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void dump() const;
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private:
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/// The function's output is a tuple of integers, with the ith element of the
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/// tuple defined by the affine expression given by the ith row of this output
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/// matrix.
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Matrix output;
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};
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/// This class represents a piece-wise MultiAffineFunction. This can be thought
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/// of as a list of MultiAffineFunction with disjoint domains, with each having
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/// their own affine expressions for their output tuples. For example, we could
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/// have a function with two input variables (x, y), defined as
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///
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/// f(x, y) = (2*x + y, y - 4) if x >= 0, y >= 0
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/// = (-2*x + y, y + 4) if x < 0, y < 0
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/// = (4, 1) if x < 0, y >= 0
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///
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/// Note that the domains all have to be *disjoint*. Otherwise, the behaviour of
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/// this class is undefined. The domains need not cover all possible points;
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/// this represents a partial function and so could be undefined at some points.
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///
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/// As in PresburgerSets, the input ids are partitioned into dimension ids and
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/// symbolic ids.
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///
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/// Support is provided to compare equality of two such functions as well as
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/// finding the value of the function at a point. Note that local ids in the
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/// piece are not supported for the latter.
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class PWMAFunction {
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public:
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PWMAFunction(unsigned numDims, unsigned numSymbols, unsigned numOutputs)
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: numDims(numDims), numSymbols(numSymbols), numOutputs(numOutputs) {
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assert(numOutputs >= 1 && "The function must output something!");
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}
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void addPiece(const MultiAffineFunction &piece);
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void addPiece(const IntegerPolyhedron &domain, const Matrix &output);
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const MultiAffineFunction &getPiece(unsigned i) const { return pieces[i]; }
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unsigned getNumPieces() const { return pieces.size(); }
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unsigned getNumOutputs() const { return numOutputs; }
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unsigned getNumInputs() const { return numDims + numSymbols; }
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unsigned getNumDimIds() const { return numDims; }
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unsigned getNumSymbolIds() const { return numSymbols; }
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MultiAffineFunction &getPiece(unsigned i) { return pieces[i]; }
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/// Return the domain of this piece-wise MultiAffineFunction. This is the
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/// union of the domains of all the pieces.
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PresburgerSet getDomain() const;
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/// Check whether the `this` and the given function have compatible
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/// dimensions, i.e., the same number of dimension inputs, symbol inputs, and
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/// outputs.
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bool hasCompatibleDimensions(const MultiAffineFunction &f) const;
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bool hasCompatibleDimensions(const PWMAFunction &f) const;
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/// Return the value at the specified point and an empty optional if the
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/// point does not lie in the domain.
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///
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/// Note: domains with local ids are not yet supported, and will assert-fail.
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Optional<SmallVector<int64_t, 8>> valueAt(ArrayRef<int64_t> point) const;
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/// Return whether `this` and `other` are equal as PWMAFunctions, i.e. whether
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/// they have the same dimensions, the same domain and they take the same
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/// value at every point in the domain.
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bool isEqual(const PWMAFunction &other) const;
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void print(raw_ostream &os) const;
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void dump() const;
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private:
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/// The list of pieces in this piece-wise MultiAffineFunction.
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SmallVector<MultiAffineFunction, 4> pieces;
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/// The number of dimensions ids in the domains.
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unsigned numDims;
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/// The number of symbol ids in the domains.
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unsigned numSymbols;
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/// The number of output ids.
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unsigned numOutputs;
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};
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} // namespace mlir
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#endif // MLIR_ANALYSIS_PRESBURGER_PWMAFUNCTION_H
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@ -3,6 +3,7 @@ add_mlir_library(MLIRPresburger
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LinearTransform.cpp
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Matrix.cpp
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PresburgerSet.cpp
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PWMAFunction.cpp
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Simplex.cpp
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Utils.cpp
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@ -1065,24 +1065,17 @@ void IntegerPolyhedron::removeRedundantConstraints() {
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equalities.resizeVertically(pos);
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}
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/// Eliminate `pos2^th` local identifier, replacing its every instance with
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/// `pos1^th` local identifier. This function is intended to be used to remove
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/// redundancy when local variables at position `pos1` and `pos2` are restricted
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/// to have the same value.
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static void eliminateRedundantLocalId(IntegerPolyhedron &poly, unsigned pos1,
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unsigned pos2) {
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void IntegerPolyhedron::eliminateRedundantLocalId(unsigned posA,
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unsigned posB) {
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assert(posA < getNumLocalIds() && "Invalid local id position");
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assert(posB < getNumLocalIds() && "Invalid local id position");
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assert(pos1 < poly.getNumLocalIds() && "Invalid local id position");
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assert(pos2 < poly.getNumLocalIds() && "Invalid local id position");
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unsigned localOffset = poly.getNumDimAndSymbolIds();
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pos1 += localOffset;
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pos2 += localOffset;
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for (unsigned i = 0, e = poly.getNumInequalities(); i < e; ++i)
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poly.atIneq(i, pos1) += poly.atIneq(i, pos2);
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for (unsigned i = 0, e = poly.getNumEqualities(); i < e; ++i)
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poly.atEq(i, pos1) += poly.atEq(i, pos2);
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poly.removeId(pos2);
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unsigned localOffset = getIdKindOffset(IdKind::Local);
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posA += localOffset;
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posB += localOffset;
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inequalities.addToColumn(posB, posA, 1);
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equalities.addToColumn(posB, posA, 1);
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removeId(posB);
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}
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/// Adds additional local ids to the sets such that they both have the union
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@ -1129,8 +1122,8 @@ void IntegerPolyhedron::mergeLocalIds(IntegerPolyhedron &other) {
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// Merge function that merges the local variables in both sets by treating
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// them as the same identifier.
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auto merge = [&polyA, &polyB](unsigned i, unsigned j) -> bool {
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eliminateRedundantLocalId(polyA, i, j);
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eliminateRedundantLocalId(polyB, i, j);
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polyA.eliminateRedundantLocalId(i, j);
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polyB.eliminateRedundantLocalId(i, j);
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return true;
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};
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@ -0,0 +1,198 @@
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//===- PWMAFunction.cpp - MLIR PWMAFunction Class -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Analysis/Presburger/PWMAFunction.h"
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#include "mlir/Analysis/Presburger/Simplex.h"
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using namespace mlir;
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// Return the result of subtracting the two given vectors pointwise.
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// The vectors must be of the same size.
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// e.g., [3, 4, 6] - [2, 5, 1] = [1, -1, 5].
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static SmallVector<int64_t, 8> subtract(ArrayRef<int64_t> vecA,
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ArrayRef<int64_t> vecB) {
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assert(vecA.size() == vecB.size() &&
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"Cannot subtract vectors of differing lengths!");
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SmallVector<int64_t, 8> result;
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result.reserve(vecA.size());
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for (unsigned i = 0, e = vecA.size(); i < e; ++i)
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result.push_back(vecA[i] - vecB[i]);
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return result;
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}
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PresburgerSet PWMAFunction::getDomain() const {
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PresburgerSet domain =
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PresburgerSet::getEmptySet(getNumDimIds(), getNumSymbolIds());
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for (const MultiAffineFunction &piece : pieces)
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domain.unionPolyInPlace(piece.getDomain());
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return domain;
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}
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Optional<SmallVector<int64_t, 8>>
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MultiAffineFunction::valueAt(ArrayRef<int64_t> point) const {
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assert(getNumLocalIds() == 0 && "Local ids are not yet supported!");
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assert(point.size() == getNumIds() && "Point has incorrect dimensionality!");
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if (!getDomain().containsPoint(point))
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return {};
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// The point lies in the domain, so we need to compute the output value.
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// The matrix `output` has an affine expression in the ith row, corresponding
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// to the expression for the ith value in the output vector. The last column
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// of the matrix contains the constant term. Let v be the input point with
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// a 1 appended at the end. We can see that output * v gives the desired
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// output vector.
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SmallVector<int64_t, 8> pointHomogenous{llvm::to_vector(point)};
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pointHomogenous.push_back(1);
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SmallVector<int64_t, 8> result =
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output.postMultiplyWithColumn(pointHomogenous);
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assert(result.size() == getNumOutputs());
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return result;
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}
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Optional<SmallVector<int64_t, 8>>
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PWMAFunction::valueAt(ArrayRef<int64_t> point) const {
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assert(point.size() == getNumInputs() &&
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"Point has incorrect dimensionality!");
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for (const MultiAffineFunction &piece : pieces)
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if (Optional<SmallVector<int64_t, 8>> output = piece.valueAt(point))
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return output;
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return {};
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}
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void MultiAffineFunction::print(raw_ostream &os) const {
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os << "Domain:";
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IntegerPolyhedron::print(os);
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os << "Output:\n";
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output.print(os);
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os << "\n";
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}
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void MultiAffineFunction::dump() const { print(llvm::errs()); }
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bool MultiAffineFunction::isEqual(const MultiAffineFunction &other) const {
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return hasCompatibleDimensions(other) &&
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getDomain().isEqual(other.getDomain()) &&
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isEqualWhereDomainsOverlap(other);
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}
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unsigned MultiAffineFunction::insertId(IdKind kind, unsigned pos,
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unsigned num) {
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unsigned absolutePos = getIdKindOffset(kind) + pos;
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output.insertColumns(absolutePos, num);
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return IntegerPolyhedron::insertId(kind, pos, num);
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}
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void MultiAffineFunction::swapId(unsigned posA, unsigned posB) {
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output.swapColumns(posA, posB);
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IntegerPolyhedron::swapId(posA, posB);
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}
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void MultiAffineFunction::removeIdRange(unsigned idStart, unsigned idLimit) {
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output.removeColumns(idStart, idLimit - idStart);
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IntegerPolyhedron::removeIdRange(idStart, idLimit);
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}
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void MultiAffineFunction::eliminateRedundantLocalId(unsigned posA,
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unsigned posB) {
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output.addToColumn(posB, posA, /*scale=*/1);
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IntegerPolyhedron::eliminateRedundantLocalId(posA, posB);
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}
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bool MultiAffineFunction::isEqualWhereDomainsOverlap(
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MultiAffineFunction other) const {
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if (!hasCompatibleDimensions(other))
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return false;
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// `commonFunc` has the same output as `this`.
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MultiAffineFunction commonFunc = *this;
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// After this merge, `commonFunc` and `other` have the same local ids; they
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// are merged.
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commonFunc.mergeLocalIds(other);
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// After this, the domain of `commonFunc` will be the intersection of the
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// domains of `this` and `other`.
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commonFunc.IntegerPolyhedron::append(other);
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// `commonDomainMatching` contains the subset of the common domain
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// where the outputs of `this` and `other` match.
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//
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// We want to add constraints equating the outputs of `this` and `other`.
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// However, `this` may have difference local ids from `other`, whereas we
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// need both to have the same locals. Accordingly, we use `commonFunc.output`
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// in place of `this->output`, since `commonFunc` has the same output but also
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// has its locals merged.
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IntegerPolyhedron commonDomainMatching = commonFunc.getDomain();
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for (unsigned row = 0, e = getNumOutputs(); row < e; ++row)
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commonDomainMatching.addEquality(
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subtract(commonFunc.output.getRow(row), other.output.getRow(row)));
|
||||
|
||||
// If the whole common domain is a subset of commonDomainMatching, then they
|
||||
// are equal and the two functions match on the whole common domain.
|
||||
return commonFunc.getDomain().isSubsetOf(commonDomainMatching);
|
||||
}
|
||||
|
||||
/// Two PWMAFunctions are equal if they have the same dimensionalities,
|
||||
/// the same domain, and take the same value at every point in the domain.
|
||||
bool PWMAFunction::isEqual(const PWMAFunction &other) const {
|
||||
if (!hasCompatibleDimensions(other))
|
||||
return false;
|
||||
|
||||
if (!this->getDomain().isEqual(other.getDomain()))
|
||||
return false;
|
||||
|
||||
// Check if, whenever the domains of a piece of `this` and a piece of `other`
|
||||
// overlap, they take the same output value. If `this` and `other` have the
|
||||
// same domain (checked above), then this check passes iff the two functions
|
||||
// have the same output at every point in the domain.
|
||||
for (const MultiAffineFunction &aPiece : this->pieces)
|
||||
for (const MultiAffineFunction &bPiece : other.pieces)
|
||||
if (!aPiece.isEqualWhereDomainsOverlap(bPiece))
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
void PWMAFunction::addPiece(const MultiAffineFunction &piece) {
|
||||
assert(hasCompatibleDimensions(piece) &&
|
||||
"Piece to be added is not compatible with this PWMAFunction!");
|
||||
assert(piece.isConsistent() && "Piece is internally inconsistent!");
|
||||
assert(this->getDomain()
|
||||
.intersect(PresburgerSet(piece.getDomain()))
|
||||
.isIntegerEmpty() &&
|
||||
"New piece's domain overlaps with that of existing pieces!");
|
||||
pieces.push_back(piece);
|
||||
}
|
||||
|
||||
void PWMAFunction::addPiece(const IntegerPolyhedron &domain,
|
||||
const Matrix &output) {
|
||||
addPiece(MultiAffineFunction(domain, output));
|
||||
}
|
||||
|
||||
void PWMAFunction::print(raw_ostream &os) const {
|
||||
os << pieces.size() << " pieces:\n";
|
||||
for (const MultiAffineFunction &piece : pieces)
|
||||
piece.print(os);
|
||||
}
|
||||
|
||||
/// The hasCompatibleDimensions functions don't check the number of local ids;
|
||||
/// functions are still compatible if they have differing number of locals.
|
||||
bool MultiAffineFunction::hasCompatibleDimensions(
|
||||
const MultiAffineFunction &f) const {
|
||||
return getNumDimIds() == f.getNumDimIds() &&
|
||||
getNumSymbolIds() == f.getNumSymbolIds() &&
|
||||
getNumOutputs() == f.getNumOutputs();
|
||||
}
|
||||
bool PWMAFunction::hasCompatibleDimensions(const MultiAffineFunction &f) const {
|
||||
return getNumDimIds() == f.getNumDimIds() &&
|
||||
getNumSymbolIds() == f.getNumSymbolIds() &&
|
||||
getNumOutputs() == f.getNumOutputs();
|
||||
}
|
||||
bool PWMAFunction::hasCompatibleDimensions(const PWMAFunction &f) const {
|
||||
return getNumDimIds() == f.getNumDimIds() &&
|
||||
getNumSymbolIds() == f.getNumSymbolIds() &&
|
||||
getNumOutputs() == f.getNumOutputs();
|
||||
}
|
||||
|
|
@ -3,6 +3,7 @@ add_mlir_unittest(MLIRPresburgerTests
|
|||
LinearTransformTest.cpp
|
||||
MatrixTest.cpp
|
||||
PresburgerSetTest.cpp
|
||||
PWMAFunctionTest.cpp
|
||||
SimplexTest.cpp
|
||||
../../Dialect/Affine/Analysis/AffineStructuresParser.cpp
|
||||
)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,183 @@
|
|||
//===- PWMAFunctionTest.cpp - Tests for PWMAFunction ----------------------===//
|
||||
//
|
||||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||||
// See https://llvm.org/LICENSE.txt for license information.
|
||||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
// This file contains tests for PWMAFunction.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "mlir/Analysis/Presburger/PWMAFunction.h"
|
||||
#include "../../Dialect/Affine/Analysis/AffineStructuresParser.h"
|
||||
#include "mlir/Analysis/Presburger/PresburgerSet.h"
|
||||
|
||||
#include <gmock/gmock.h>
|
||||
#include <gtest/gtest.h>
|
||||
|
||||
namespace mlir {
|
||||
using testing::ElementsAre;
|
||||
|
||||
/// Parses an IntegerPolyhedron from a StringRef. It is expected that the
|
||||
/// string represents a valid IntegerSet, otherwise it will violate a gtest
|
||||
/// assertion.
|
||||
static IntegerPolyhedron parsePoly(StringRef str, MLIRContext *context) {
|
||||
FailureOr<IntegerPolyhedron> poly = parseIntegerSetToFAC(str, context);
|
||||
EXPECT_TRUE(succeeded(poly));
|
||||
return *poly;
|
||||
}
|
||||
|
||||
static Matrix makeMatrix(unsigned numRow, unsigned numColumns,
|
||||
ArrayRef<SmallVector<int64_t, 8>> matrix) {
|
||||
Matrix results(numRow, numColumns);
|
||||
assert(matrix.size() == numRow);
|
||||
for (unsigned i = 0; i < numRow; ++i) {
|
||||
assert(matrix[i].size() == numColumns &&
|
||||
"Output expression has incorrect dimensionality!");
|
||||
for (unsigned j = 0; j < numColumns; ++j)
|
||||
results(i, j) = matrix[i][j];
|
||||
}
|
||||
return results;
|
||||
}
|
||||
|
||||
/// Construct a PWMAFunction given the dimensionalities and an array describing
|
||||
/// the list of pieces. Each piece is given by a string describing the domain
|
||||
/// and a 2D array that represents the output.
|
||||
static PWMAFunction parsePWMAF(
|
||||
unsigned numInputs, unsigned numOutputs,
|
||||
ArrayRef<std::pair<StringRef, SmallVector<SmallVector<int64_t, 8>, 8>>>
|
||||
data,
|
||||
unsigned numSymbols = 0) {
|
||||
static MLIRContext context;
|
||||
|
||||
PWMAFunction result(numInputs - numSymbols, numSymbols, numOutputs);
|
||||
for (const auto &pair : data) {
|
||||
IntegerPolyhedron domain = parsePoly(pair.first, &context);
|
||||
result.addPiece(
|
||||
domain, makeMatrix(numOutputs, domain.getNumIds() + 1, pair.second));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
TEST(PWAFunctionTest, isEqual) {
|
||||
MLIRContext context;
|
||||
|
||||
// The output expressions are different but it doesn't matter because they are
|
||||
// equal in this domain.
|
||||
PWMAFunction idAtZeros = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (y == 0)", {{1, 0, 0}, {0, 1, 0}}}, // (x, y).
|
||||
{"(x, y) : (y - 1 >= 0, x == 0)", {{1, 0, 0}, {0, 1, 0}}}, // (x, y).
|
||||
{"(x, y) : (-y - 1 >= 0, x == 0)", {{1, 0, 0}, {0, 1, 0}}} // (x, y).
|
||||
});
|
||||
PWMAFunction idAtZeros2 = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (y == 0)", {{1, 0, 0}, {0, 20, 0}}}, // (x, 20y).
|
||||
{"(x, y) : (y - 1 >= 0, x == 0)", {{30, 0, 0}, {0, 1, 0}}}, //(30x, y)
|
||||
{"(x, y) : (-y - 1 > =0, x == 0)", {{30, 0, 0}, {0, 1, 0}}} //(30x, y)
|
||||
});
|
||||
EXPECT_TRUE(idAtZeros.isEqual(idAtZeros2));
|
||||
|
||||
PWMAFunction notIdAtZeros = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (y == 0)", {{1, 0, 0}, {0, 1, 0}}}, // (x, y).
|
||||
{"(x, y) : (y - 1 >= 0, x == 0)", {{1, 0, 0}, {0, 2, 0}}}, // (x, 2y)
|
||||
{"(x, y) : (-y - 1 >= 0, x == 0)", {{1, 0, 0}, {0, 2, 0}}}, // (x, 2y)
|
||||
});
|
||||
EXPECT_FALSE(idAtZeros.isEqual(notIdAtZeros));
|
||||
|
||||
// These match at their intersection but one has a bigger domain.
|
||||
PWMAFunction idNoNegNegQuadrant = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (x >= 0)", {{1, 0, 0}, {0, 1, 0}}}, // (x, y).
|
||||
{"(x, y) : (-x - 1 >= 0, y >= 0)", {{1, 0, 0}, {0, 1, 0}}} // (x, y).
|
||||
});
|
||||
PWMAFunction idOnlyPosX =
|
||||
parsePWMAF(/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (x >= 0)", {{1, 0, 0}, {0, 1, 0}}}, // (x, y).
|
||||
});
|
||||
EXPECT_FALSE(idNoNegNegQuadrant.isEqual(idOnlyPosX));
|
||||
|
||||
// Different representations of the same domain.
|
||||
PWMAFunction sumPlusOne = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x, y) : (x >= 0)", {{1, 1, 1}}}, // x + y + 1.
|
||||
{"(x, y) : (-x - 1 >= 0, -y - 1 >= 0)", {{1, 1, 1}}}, // x + y + 1.
|
||||
{"(x, y) : (-x - 1 >= 0, y >= 0)", {{1, 1, 1}}} // x + y + 1.
|
||||
});
|
||||
PWMAFunction sumPlusOne2 =
|
||||
parsePWMAF(/*numInputs=*/2, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x, y) : ()", {{1, 1, 1}}}, // x + y + 1.
|
||||
});
|
||||
EXPECT_TRUE(sumPlusOne.isEqual(sumPlusOne2));
|
||||
|
||||
// Functions with zero input dimensions.
|
||||
PWMAFunction noInputs1 = parsePWMAF(/*numInputs=*/0, /*numOutputs=*/1,
|
||||
{
|
||||
{"() : ()", {{1}}}, // 1.
|
||||
});
|
||||
PWMAFunction noInputs2 = parsePWMAF(/*numInputs=*/0, /*numOutputs=*/1,
|
||||
{
|
||||
{"() : ()", {{2}}}, // 1.
|
||||
});
|
||||
EXPECT_TRUE(noInputs1.isEqual(noInputs1));
|
||||
EXPECT_FALSE(noInputs1.isEqual(noInputs2));
|
||||
|
||||
// Mismatched dimensionalities.
|
||||
EXPECT_FALSE(noInputs1.isEqual(sumPlusOne));
|
||||
EXPECT_FALSE(idOnlyPosX.isEqual(sumPlusOne));
|
||||
|
||||
// Divisions.
|
||||
// Domain is only multiples of 6; x = 6k for some k.
|
||||
// x + 4(x/2) + 4(x/3) == 26k.
|
||||
PWMAFunction mul2AndMul3 = parsePWMAF(
|
||||
/*numInputs=*/1, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x) : (x - 2*(x floordiv 2) == 0, x - 3*(x floordiv 3) == 0)",
|
||||
{{1, 4, 4, 0}}}, // x + 4(x/2) + 4(x/3).
|
||||
});
|
||||
PWMAFunction mul6 = parsePWMAF(
|
||||
/*numInputs=*/1, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x) : (x - 6*(x floordiv 6) == 0)", {{0, 26, 0}}}, // 26(x/6).
|
||||
});
|
||||
EXPECT_TRUE(mul2AndMul3.isEqual(mul6));
|
||||
|
||||
PWMAFunction mul6diff = parsePWMAF(
|
||||
/*numInputs=*/1, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x) : (x - 5*(x floordiv 5) == 0)", {{0, 52, 0}}}, // 52(x/6).
|
||||
});
|
||||
EXPECT_FALSE(mul2AndMul3.isEqual(mul6diff));
|
||||
|
||||
PWMAFunction mul5 = parsePWMAF(
|
||||
/*numInputs=*/1, /*numOutputs=*/1,
|
||||
{
|
||||
{"(x) : (x - 5*(x floordiv 5) == 0)", {{0, 26, 0}}}, // 26(x/5).
|
||||
});
|
||||
EXPECT_FALSE(mul2AndMul3.isEqual(mul5));
|
||||
}
|
||||
|
||||
TEST(PWMAFunction, valueAt) {
|
||||
PWMAFunction nonNegPWAF = parsePWMAF(
|
||||
/*numInputs=*/2, /*numOutputs=*/2,
|
||||
{
|
||||
{"(x, y) : (x >= 0)", {{1, 2, 3}, {3, 4, 5}}}, // (x, y).
|
||||
{"(x, y) : (y >= 0, -x - 1 >= 0)", {{-1, 2, 3}, {-3, 4, 5}}} // (x, y)
|
||||
});
|
||||
EXPECT_THAT(*nonNegPWAF.valueAt({2, 3}), ElementsAre(11, 23));
|
||||
EXPECT_THAT(*nonNegPWAF.valueAt({-2, 3}), ElementsAre(11, 23));
|
||||
EXPECT_THAT(*nonNegPWAF.valueAt({2, -3}), ElementsAre(-1, -1));
|
||||
EXPECT_FALSE(nonNegPWAF.valueAt({-2, -3}).hasValue());
|
||||
}
|
||||
|
||||
} // namespace mlir
|
||||
Loading…
Reference in New Issue