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//===- DataLayoutAnalysis.cpp ---------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "mlir/Analysis/DataLayoutAnalysis.h"
#include "mlir/IR/BuiltinOps.h"
#include "mlir/IR/Operation.h"
#include "mlir/Interfaces/DataLayoutInterfaces.h"
using namespace mlir;
DataLayoutAnalysis::DataLayoutAnalysis(Operation *root)
: defaultLayout(std::make_unique<DataLayout>(DataLayoutOpInterface())) {
// Construct a DataLayout if possible from the op.
auto computeLayout = [this](Operation *op) {
if (auto iface = dyn_cast<DataLayoutOpInterface>(op))
layouts[op] = std::make_unique<DataLayout>(iface);
if (auto module = dyn_cast<ModuleOp>(op))
layouts[op] = std::make_unique<DataLayout>(module);
};
// Compute layouts for both ancestors and descendants.
root->walk(computeLayout);
for (Operation *ancestor = root->getParentOp(); ancestor != nullptr;
ancestor = ancestor->getParentOp()) {
computeLayout(ancestor);
}
}
const DataLayout &DataLayoutAnalysis::getAbove(Operation *operation) const {
for (Operation *ancestor = operation->getParentOp(); ancestor != nullptr;
ancestor = ancestor->getParentOp()) {
auto it = layouts.find(ancestor);
if (it != layouts.end())
return *it->getSecond();
}
// Fallback to the default layout.
return *defaultLayout;
}
const DataLayout &DataLayoutAnalysis::getAtOrAbove(Operation *operation) const {
auto it = layouts.find(operation);
if (it != layouts.end())
return *it->getSecond();
return getAbove(operation);
}
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