6953cf6502
This revision adds a helper function to hoist vector.transfer_read / vector.transfer_write pairs out of immediately enclosing scf::ForOp iteratively, if the following conditions are true: 1. The 2 ops access the same memref with the same indices. 2. All operands are invariant under the enclosing scf::ForOp. 3. No uses of the memref either dominate the transfer_read or are dominated by the transfer_write (i.e. no aliasing between the write and the read across the loop) To improve hoisting opportunities, call the `moveLoopInvariantCode` helper function on the candidate loop above which to hoist. Hoisting the transfers results in scf::ForOp yielding the value that originally transited through memory. This revision additionally exposes `moveLoopInvariantCode` as a helper in LoopUtils.h and updates SliceAnalysis to support return scf::For values and allow hoisting across multiple scf::ForOps. Differential Revision: https://reviews.llvm.org/D81199
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//===- TestLinalgHoisting.cpp - Test Linalg hoisting functions ------------===//
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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 logic for testing Linalg hoisting functions.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Linalg/IR/LinalgOps.h"
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#include "mlir/Dialect/Linalg/Transforms/Hoisting.h"
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#include "mlir/Pass/Pass.h"
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using namespace mlir;
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using namespace mlir::linalg;
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namespace {
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struct TestLinalgHoisting
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: public PassWrapper<TestLinalgHoisting, FunctionPass> {
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TestLinalgHoisting() = default;
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TestLinalgHoisting(const TestLinalgHoisting &pass) {}
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void runOnFunction() override;
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Option<bool> testHoistViewAllocs{
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*this, "test-hoist-view-allocs",
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llvm::cl::desc("Test hoisting alloc used by view"),
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llvm::cl::init(false)};
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Option<bool> testHoistRedundantTransfers{
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*this, "test-hoist-redundant-transfers",
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llvm::cl::desc("Test hoisting transfer_read/transfer_write pairs"),
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llvm::cl::init(false)};
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};
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} // end anonymous namespace
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void TestLinalgHoisting::runOnFunction() {
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if (testHoistViewAllocs) {
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hoistViewAllocOps(getFunction());
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return;
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}
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if (testHoistRedundantTransfers) {
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hoistRedundantVectorTransfers(getFunction());
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return;
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}
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}
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namespace mlir {
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void registerTestLinalgHoisting() {
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PassRegistration<TestLinalgHoisting> testTestLinalgHoistingPass(
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"test-linalg-hoisting", "Test Linalg hoisting functions.");
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}
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} // namespace mlir
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