926fb685de
Since raw pointers are always passed around for IR construct without implying any ownership transfer, it can be error prone to have implicit ownership transferred the same way. For example this code can seem harmless: Pass *pass = .... pm.addPass(pass); pm.addPass(pass); pm.run(module); PiperOrigin-RevId: 263053082
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
//===- TestLoopParametricTiling.cpp --- Parametric loop tiling pass -------===//
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//
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// Copyright 2019 The MLIR Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// =============================================================================
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//
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// This file implements a pass to parametrically tile nests of standard loops.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/LoopOps/LoopOps.h"
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#include "mlir/IR/Builders.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Transforms/LoopUtils.h"
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#include "mlir/Transforms/Passes.h"
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using namespace mlir;
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static llvm::cl::list<int> clOuterLoopSizes(
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"test-outer-loop-sizes", llvm::cl::MiscFlags::CommaSeparated,
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llvm::cl::desc(
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"fixed number of iterations that the outer loops should have"));
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namespace {
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// Extracts fixed-range loops for top-level loop nests with ranges defined in
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// the pass constructor. Assumes loops are permutable.
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class SimpleParametricLoopTilingPass
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: public FunctionPass<SimpleParametricLoopTilingPass> {
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public:
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explicit SimpleParametricLoopTilingPass(ArrayRef<int64_t> outerLoopSizes)
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: sizes(outerLoopSizes.begin(), outerLoopSizes.end()) {}
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void runOnFunction() override {
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FuncOp func = getFunction();
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func.walk<loop::ForOp>([this](loop::ForOp op) {
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// Ignore nested loops.
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if (op.getParentRegion()->getParentOfType<loop::ForOp>())
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return;
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extractFixedOuterLoops(op, sizes);
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});
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}
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SmallVector<int64_t, 4> sizes;
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};
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} // end namespace
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std::unique_ptr<FunctionPassBase>
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mlir::createSimpleParametricTilingPass(ArrayRef<int64_t> outerLoopSizes) {
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return llvm::make_unique<SimpleParametricLoopTilingPass>(outerLoopSizes);
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}
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static PassRegistration<SimpleParametricLoopTilingPass>
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reg("test-extract-fixed-outer-loops",
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"test application of parametric tiling to the outer loops so that the "
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"ranges of outer loops become static",
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[] {
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auto pass = llvm::make_unique<SimpleParametricLoopTilingPass>(
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ArrayRef<int64_t>{});
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pass->sizes.assign(clOuterLoopSizes.begin(), clOuterLoopSizes.end());
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return pass;
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});
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