forked from OSchip/llvm-project
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//===- IntegerSet.cpp - MLIR Integer Set 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/IR/IntegerSet.h"
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#include "IntegerSetDetail.h"
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using namespace mlir;
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using namespace mlir::detail;
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unsigned IntegerSet::getNumDims() const { return set->dimCount; }
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unsigned IntegerSet::getNumSymbols() const { return set->symbolCount; }
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unsigned IntegerSet::getNumInputs() const {
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return set->dimCount + set->symbolCount;
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}
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unsigned IntegerSet::getNumConstraints() const {
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return set->constraints.size();
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}
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unsigned IntegerSet::getNumEqualities() const {
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unsigned numEqualities = 0;
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for (unsigned i = 0, e = getNumConstraints(); i < e; i++)
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if (isEq(i))
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++numEqualities;
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return numEqualities;
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}
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unsigned IntegerSet::getNumInequalities() const {
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return getNumConstraints() - getNumEqualities();
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}
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bool IntegerSet::isEmptyIntegerSet() const {
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// This will only work if uniquing is on.
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static_assert(kUniquingThreshold >= 1,
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"uniquing threshold should be at least one");
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return *this == getEmptySet(set->dimCount, set->symbolCount, getContext());
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}
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ArrayRef<AffineExpr> IntegerSet::getConstraints() const {
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return set->constraints;
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}
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AffineExpr IntegerSet::getConstraint(unsigned idx) const {
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return getConstraints()[idx];
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}
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/// Returns the equality bits, which specify whether each of the constraints
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/// is an equality or inequality.
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ArrayRef<bool> IntegerSet::getEqFlags() const { return set->eqFlags; }
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/// Returns true if the idx^th constraint is an equality, false if it is an
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/// inequality.
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bool IntegerSet::isEq(unsigned idx) const { return getEqFlags()[idx]; }
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MLIRContext *IntegerSet::getContext() const {
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return getConstraint(0).getContext();
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}
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/// Walk all of the AffineExpr's in this set. Each node in an expression
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/// tree is visited in postorder.
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void IntegerSet::walkExprs(function_ref<void(AffineExpr)> callback) const {
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for (auto expr : getConstraints())
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expr.walk(callback);
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}
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IntegerSet IntegerSet::replaceDimsAndSymbols(
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ArrayRef<AffineExpr> dimReplacements, ArrayRef<AffineExpr> symReplacements,
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unsigned numResultDims, unsigned numResultSyms) {
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SmallVector<AffineExpr, 8> constraints;
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constraints.reserve(getNumConstraints());
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for (auto cst : getConstraints())
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constraints.push_back(
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cst.replaceDimsAndSymbols(dimReplacements, symReplacements));
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return get(numResultDims, numResultSyms, constraints, getEqFlags());
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}
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