forked from OSchip/llvm-project
319 lines
12 KiB
C++
319 lines
12 KiB
C++
//===- FunctionSupport.cpp - Utility types for function-like ops ----------===//
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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/FunctionSupport.h"
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#include "mlir/Support/LLVM.h"
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#include "llvm/ADT/BitVector.h"
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using namespace mlir;
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/// Helper to call a callback once on each index in the range
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/// [0, `totalIndices`), *except* for the indices given in `indices`.
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/// `indices` is allowed to have duplicates and can be in any order.
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inline void iterateIndicesExcept(unsigned totalIndices,
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ArrayRef<unsigned> indices,
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function_ref<void(unsigned)> callback) {
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llvm::BitVector skipIndices(totalIndices);
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for (unsigned i : indices)
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skipIndices.set(i);
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for (unsigned i = 0; i < totalIndices; ++i)
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if (!skipIndices.test(i))
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callback(i);
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}
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//===----------------------------------------------------------------------===//
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// Function Arguments and Results.
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//===----------------------------------------------------------------------===//
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static bool isEmptyAttrDict(Attribute attr) {
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return attr.cast<DictionaryAttr>().empty();
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}
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DictionaryAttr mlir::function_like_impl::getArgAttrDict(Operation *op,
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unsigned index) {
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ArrayAttr attrs = op->getAttrOfType<ArrayAttr>(getArgDictAttrName());
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DictionaryAttr argAttrs =
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attrs ? attrs[index].cast<DictionaryAttr>() : DictionaryAttr();
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return argAttrs;
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}
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DictionaryAttr mlir::function_like_impl::getResultAttrDict(Operation *op,
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unsigned index) {
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ArrayAttr attrs = op->getAttrOfType<ArrayAttr>(getResultDictAttrName());
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DictionaryAttr resAttrs =
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attrs ? attrs[index].cast<DictionaryAttr>() : DictionaryAttr();
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return resAttrs;
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}
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void mlir::function_like_impl::detail::setArgResAttrDict(
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Operation *op, StringRef attrName, unsigned numTotalIndices, unsigned index,
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DictionaryAttr attrs) {
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ArrayAttr allAttrs = op->getAttrOfType<ArrayAttr>(attrName);
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if (!allAttrs) {
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if (attrs.empty())
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return;
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// If this attribute is not empty, we need to create a new attribute array.
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SmallVector<Attribute, 8> newAttrs(numTotalIndices,
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DictionaryAttr::get(op->getContext()));
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newAttrs[index] = attrs;
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op->setAttr(attrName, ArrayAttr::get(op->getContext(), newAttrs));
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return;
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}
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// Check to see if the attribute is different from what we already have.
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if (allAttrs[index] == attrs)
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return;
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// If it is, check to see if the attribute array would now contain only empty
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// dictionaries.
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ArrayRef<Attribute> rawAttrArray = allAttrs.getValue();
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if (attrs.empty() &&
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llvm::all_of(rawAttrArray.take_front(index), isEmptyAttrDict) &&
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llvm::all_of(rawAttrArray.drop_front(index + 1), isEmptyAttrDict)) {
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op->removeAttr(attrName);
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return;
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}
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// Otherwise, create a new attribute array with the updated dictionary.
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SmallVector<Attribute, 8> newAttrs(rawAttrArray.begin(), rawAttrArray.end());
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newAttrs[index] = attrs;
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op->setAttr(attrName, ArrayAttr::get(op->getContext(), newAttrs));
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}
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/// Set all of the argument or result attribute dictionaries for a function.
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static void setAllArgResAttrDicts(Operation *op, StringRef attrName,
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ArrayRef<Attribute> attrs) {
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if (llvm::all_of(attrs, isEmptyAttrDict))
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op->removeAttr(attrName);
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else
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op->setAttr(attrName, ArrayAttr::get(op->getContext(), attrs));
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}
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void mlir::function_like_impl::setAllArgAttrDicts(
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Operation *op, ArrayRef<DictionaryAttr> attrs) {
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setAllArgAttrDicts(op, ArrayRef<Attribute>(attrs.data(), attrs.size()));
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}
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void mlir::function_like_impl::setAllArgAttrDicts(Operation *op,
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ArrayRef<Attribute> attrs) {
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auto wrappedAttrs = llvm::map_range(attrs, [op](Attribute attr) -> Attribute {
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return !attr ? DictionaryAttr::get(op->getContext()) : attr;
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});
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setAllArgResAttrDicts(op, getArgDictAttrName(),
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llvm::to_vector<8>(wrappedAttrs));
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}
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void mlir::function_like_impl::setAllResultAttrDicts(
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Operation *op, ArrayRef<DictionaryAttr> attrs) {
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setAllResultAttrDicts(op, ArrayRef<Attribute>(attrs.data(), attrs.size()));
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}
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void mlir::function_like_impl::setAllResultAttrDicts(
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Operation *op, ArrayRef<Attribute> attrs) {
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auto wrappedAttrs = llvm::map_range(attrs, [op](Attribute attr) -> Attribute {
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return !attr ? DictionaryAttr::get(op->getContext()) : attr;
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});
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setAllArgResAttrDicts(op, getResultDictAttrName(),
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llvm::to_vector<8>(wrappedAttrs));
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}
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void mlir::function_like_impl::insertFunctionArguments(
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Operation *op, ArrayRef<unsigned> argIndices, TypeRange argTypes,
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ArrayRef<DictionaryAttr> argAttrs, ArrayRef<Optional<Location>> argLocs,
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unsigned originalNumArgs, Type newType) {
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assert(argIndices.size() == argTypes.size());
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assert(argIndices.size() == argAttrs.size() || argAttrs.empty());
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assert(argIndices.size() == argLocs.size() || argLocs.empty());
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if (argIndices.empty())
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return;
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// There are 3 things that need to be updated:
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// - Function type.
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// - Arg attrs.
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// - Block arguments of entry block.
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Block &entry = op->getRegion(0).front();
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// Update the argument attributes of the function.
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auto oldArgAttrs = op->getAttrOfType<ArrayAttr>(getArgDictAttrName());
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if (oldArgAttrs || !argAttrs.empty()) {
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SmallVector<DictionaryAttr, 4> newArgAttrs;
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newArgAttrs.reserve(originalNumArgs + argIndices.size());
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unsigned oldIdx = 0;
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auto migrate = [&](unsigned untilIdx) {
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if (!oldArgAttrs) {
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newArgAttrs.resize(newArgAttrs.size() + untilIdx - oldIdx);
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} else {
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auto oldArgAttrRange = oldArgAttrs.getAsRange<DictionaryAttr>();
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newArgAttrs.append(oldArgAttrRange.begin() + oldIdx,
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oldArgAttrRange.begin() + untilIdx);
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}
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oldIdx = untilIdx;
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};
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for (unsigned i = 0, e = argIndices.size(); i < e; ++i) {
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migrate(argIndices[i]);
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newArgAttrs.push_back(argAttrs.empty() ? DictionaryAttr{} : argAttrs[i]);
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}
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migrate(originalNumArgs);
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setAllArgAttrDicts(op, newArgAttrs);
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}
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// Update the function type and any entry block arguments.
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op->setAttr(getTypeAttrName(), TypeAttr::get(newType));
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for (unsigned i = 0, e = argIndices.size(); i < e; ++i)
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entry.insertArgument(argIndices[i], argTypes[i],
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argLocs.empty() ? Optional<Location>{} : argLocs[i]);
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}
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void mlir::function_like_impl::insertFunctionResults(
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Operation *op, ArrayRef<unsigned> resultIndices, TypeRange resultTypes,
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ArrayRef<DictionaryAttr> resultAttrs, unsigned originalNumResults,
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Type newType) {
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assert(resultIndices.size() == resultTypes.size());
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assert(resultIndices.size() == resultAttrs.size() || resultAttrs.empty());
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if (resultIndices.empty())
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return;
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// There are 2 things that need to be updated:
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// - Function type.
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// - Result attrs.
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// Update the result attributes of the function.
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auto oldResultAttrs = op->getAttrOfType<ArrayAttr>(getResultDictAttrName());
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if (oldResultAttrs || !resultAttrs.empty()) {
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SmallVector<DictionaryAttr, 4> newResultAttrs;
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newResultAttrs.reserve(originalNumResults + resultIndices.size());
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unsigned oldIdx = 0;
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auto migrate = [&](unsigned untilIdx) {
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if (!oldResultAttrs) {
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newResultAttrs.resize(newResultAttrs.size() + untilIdx - oldIdx);
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} else {
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auto oldResultAttrsRange = oldResultAttrs.getAsRange<DictionaryAttr>();
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newResultAttrs.append(oldResultAttrsRange.begin() + oldIdx,
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oldResultAttrsRange.begin() + untilIdx);
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}
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oldIdx = untilIdx;
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};
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for (unsigned i = 0, e = resultIndices.size(); i < e; ++i) {
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migrate(resultIndices[i]);
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newResultAttrs.push_back(resultAttrs.empty() ? DictionaryAttr{}
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: resultAttrs[i]);
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}
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migrate(originalNumResults);
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setAllResultAttrDicts(op, newResultAttrs);
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}
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// Update the function type.
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op->setAttr(getTypeAttrName(), TypeAttr::get(newType));
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}
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void mlir::function_like_impl::eraseFunctionArguments(
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Operation *op, ArrayRef<unsigned> argIndices, unsigned originalNumArgs,
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Type newType) {
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// There are 3 things that need to be updated:
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// - Function type.
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// - Arg attrs.
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// - Block arguments of entry block.
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Block &entry = op->getRegion(0).front();
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// Update the argument attributes of the function.
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if (auto argAttrs = op->getAttrOfType<ArrayAttr>(getArgDictAttrName())) {
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SmallVector<DictionaryAttr, 4> newArgAttrs;
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newArgAttrs.reserve(argAttrs.size());
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iterateIndicesExcept(originalNumArgs, argIndices, [&](unsigned i) {
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newArgAttrs.emplace_back(argAttrs[i].cast<DictionaryAttr>());
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});
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setAllArgAttrDicts(op, newArgAttrs);
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}
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// Update the function type and any entry block arguments.
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op->setAttr(getTypeAttrName(), TypeAttr::get(newType));
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entry.eraseArguments(argIndices);
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}
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void mlir::function_like_impl::eraseFunctionResults(
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Operation *op, ArrayRef<unsigned> resultIndices,
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unsigned originalNumResults, Type newType) {
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// There are 2 things that need to be updated:
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// - Function type.
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// - Result attrs.
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// Update the result attributes of the function.
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if (auto resAttrs = op->getAttrOfType<ArrayAttr>(getResultDictAttrName())) {
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SmallVector<DictionaryAttr, 4> newResultAttrs;
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newResultAttrs.reserve(resAttrs.size());
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iterateIndicesExcept(originalNumResults, resultIndices, [&](unsigned i) {
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newResultAttrs.emplace_back(resAttrs[i].cast<DictionaryAttr>());
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});
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setAllResultAttrDicts(op, newResultAttrs);
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}
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// Update the function type.
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op->setAttr(getTypeAttrName(), TypeAttr::get(newType));
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}
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//===----------------------------------------------------------------------===//
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// Function type signature.
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//===----------------------------------------------------------------------===//
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FunctionType mlir::function_like_impl::getFunctionType(Operation *op) {
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assert(op->hasTrait<OpTrait::FunctionLike>());
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return op->getAttrOfType<TypeAttr>(getTypeAttrName())
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.getValue()
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.cast<FunctionType>();
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}
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void mlir::function_like_impl::setFunctionType(Operation *op,
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FunctionType newType) {
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assert(op->hasTrait<OpTrait::FunctionLike>());
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FunctionType oldType = getFunctionType(op);
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op->setAttr(getTypeAttrName(), TypeAttr::get(newType));
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// Functor used to update the argument and result attributes of the function.
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auto updateAttrFn = [&](StringRef attrName, unsigned oldCount,
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unsigned newCount, auto setAttrFn) {
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if (oldCount == newCount)
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return;
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// The new type has no arguments/results, just drop the attribute.
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if (newCount == 0) {
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op->removeAttr(attrName);
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return;
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}
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ArrayAttr attrs = op->getAttrOfType<ArrayAttr>(attrName);
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if (!attrs)
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return;
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// The new type has less arguments/results, take the first N attributes.
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if (newCount < oldCount)
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return setAttrFn(op, attrs.getValue().take_front(newCount));
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// Otherwise, the new type has more arguments/results. Initialize the new
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// arguments/results with empty attributes.
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SmallVector<Attribute> newAttrs(attrs.begin(), attrs.end());
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newAttrs.resize(newCount);
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setAttrFn(op, newAttrs);
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};
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// Update the argument and result attributes.
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updateAttrFn(function_like_impl::getArgDictAttrName(), oldType.getNumInputs(),
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newType.getNumInputs(), [&](Operation *op, auto &&attrs) {
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setAllArgAttrDicts(op, attrs);
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});
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updateAttrFn(
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function_like_impl::getResultDictAttrName(), oldType.getNumResults(),
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newType.getNumResults(),
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[&](Operation *op, auto &&attrs) { setAllResultAttrDicts(op, attrs); });
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}
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//===----------------------------------------------------------------------===//
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// Function body.
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//===----------------------------------------------------------------------===//
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Region &mlir::function_like_impl::getFunctionBody(Operation *op) {
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assert(op->hasTrait<OpTrait::FunctionLike>());
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return op->getRegion(0);
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}
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