0117865412
This commit shuffles SPIR-V code around to better follow MLIR
convention. Specifically,
* Created IR/, Transforms/, Linking/, and Utils/ subdirectories and
moved suitable code inside.
* Created SPIRVEnums.{h|cpp} for SPIR-V C/C++ enums generated from
SPIR-V spec. Previously they are cluttered inside SPIRVTypes.{h|cpp}.
* Fixed include guards in various header files (both .h and .td).
* Moved serialization tests under test/Target/SPIRV.
* Renamed TableGen backend -gen-spirv-op-utils into -gen-spirv-attr-utils
as it is only generating utility functions for attributes.
Reviewed By: mravishankar
Differential Revision: https://reviews.llvm.org/D93407
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
//===- RewriteInsertsPass.cpp - MLIR conversion pass ----------------------===//
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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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// This file implements a pass to rewrite sequential chains of
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// `spirv::CompositeInsert` operations into `spirv::CompositeConstruct`
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// operations.
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//
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//===----------------------------------------------------------------------===//
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#include "PassDetail.h"
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#include "mlir/Dialect/SPIRV/IR/SPIRVOps.h"
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#include "mlir/Dialect/SPIRV/Transforms/Passes.h"
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#include "mlir/IR/Builders.h"
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#include "mlir/IR/BuiltinOps.h"
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using namespace mlir;
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namespace {
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/// Replaces sequential chains of `spirv::CompositeInsertOp` operation into
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/// `spirv::CompositeConstructOp` operation if possible.
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class RewriteInsertsPass
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: public SPIRVRewriteInsertsPassBase<RewriteInsertsPass> {
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public:
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void runOnOperation() override;
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private:
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/// Collects a sequential insertion chain by the given
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/// `spirv::CompositeInsertOp` operation, if the given operation is the last
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/// in the chain.
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LogicalResult
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collectInsertionChain(spirv::CompositeInsertOp op,
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SmallVectorImpl<spirv::CompositeInsertOp> &insertions);
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};
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} // anonymous namespace
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void RewriteInsertsPass::runOnOperation() {
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SmallVector<SmallVector<spirv::CompositeInsertOp, 4>, 4> workList;
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getOperation().walk([this, &workList](spirv::CompositeInsertOp op) {
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SmallVector<spirv::CompositeInsertOp, 4> insertions;
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if (succeeded(collectInsertionChain(op, insertions)))
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workList.push_back(insertions);
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});
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for (const auto &insertions : workList) {
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auto lastCompositeInsertOp = insertions.back();
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auto compositeType = lastCompositeInsertOp.getType();
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auto location = lastCompositeInsertOp.getLoc();
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SmallVector<Value, 4> operands;
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// Collect inserted objects.
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for (auto insertionOp : insertions)
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operands.push_back(insertionOp.object());
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OpBuilder builder(lastCompositeInsertOp);
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auto compositeConstructOp = builder.create<spirv::CompositeConstructOp>(
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location, compositeType, operands);
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lastCompositeInsertOp.replaceAllUsesWith(
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compositeConstructOp->getResult(0));
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// Erase ops.
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for (auto insertOp : llvm::reverse(insertions)) {
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auto *op = insertOp.getOperation();
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if (op->use_empty())
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insertOp.erase();
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}
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}
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}
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LogicalResult RewriteInsertsPass::collectInsertionChain(
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spirv::CompositeInsertOp op,
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SmallVectorImpl<spirv::CompositeInsertOp> &insertions) {
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auto indicesArrayAttr = op.indices().cast<ArrayAttr>();
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// TODO: handle nested composite object.
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if (indicesArrayAttr.size() == 1) {
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auto numElements =
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op.composite().getType().cast<spirv::CompositeType>().getNumElements();
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auto index = indicesArrayAttr[0].cast<IntegerAttr>().getInt();
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// Need a last index to collect a sequential chain.
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if (index + 1 != numElements)
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return failure();
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insertions.resize(numElements);
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while (true) {
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insertions[index] = op;
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if (index == 0)
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return success();
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op = op.composite().getDefiningOp<spirv::CompositeInsertOp>();
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if (!op)
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return failure();
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--index;
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indicesArrayAttr = op.indices().cast<ArrayAttr>();
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if ((indicesArrayAttr.size() != 1) ||
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(indicesArrayAttr[0].cast<IntegerAttr>().getInt() != index))
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return failure();
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}
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}
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return failure();
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}
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std::unique_ptr<mlir::OperationPass<spirv::ModuleOp>>
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mlir::spirv::createRewriteInsertsPass() {
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return std::make_unique<RewriteInsertsPass>();
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}
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