f49d069ac0
Make promote single iteration optional on affine-loop-normalize: introduce a command-line flag and an argument on the utility. Disable it by default since such a promotion isn't normally expected with loop normalization: it could drop certain structure or information on the loops that a user wanted to preserve. Reviewed By: dcaballe Differential Revision: https://reviews.llvm.org/D137605
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
//===- AffineLoopNormalize.cpp - AffineLoopNormalize 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 normalizer for affine loop-like ops.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Affine/Passes.h"
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#include "mlir/Dialect/Affine/IR/AffineOps.h"
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#include "mlir/Dialect/Affine/Utils.h"
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#include "mlir/Dialect/Func/IR/FuncOps.h"
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namespace mlir {
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#define GEN_PASS_DEF_AFFINELOOPNORMALIZE
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#include "mlir/Dialect/Affine/Passes.h.inc"
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} // namespace mlir
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using namespace mlir;
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namespace {
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/// Normalize affine.parallel ops so that lower bounds are 0 and steps are 1.
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/// As currently implemented, this pass cannot fail, but it might skip over ops
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/// that are already in a normalized form.
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struct AffineLoopNormalizePass
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: public impl::AffineLoopNormalizeBase<AffineLoopNormalizePass> {
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explicit AffineLoopNormalizePass(bool promoteSingleIter) {
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this->promoteSingleIter = promoteSingleIter;
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}
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void runOnOperation() override {
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getOperation().walk([&](Operation *op) {
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if (auto affineParallel = dyn_cast<AffineParallelOp>(op))
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normalizeAffineParallel(affineParallel);
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else if (auto affineFor = dyn_cast<AffineForOp>(op))
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(void)normalizeAffineFor(affineFor, promoteSingleIter);
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});
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}
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};
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} // namespace
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std::unique_ptr<OperationPass<func::FuncOp>>
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mlir::createAffineLoopNormalizePass(bool promoteSingleIter) {
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return std::make_unique<AffineLoopNormalizePass>(promoteSingleIter);
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}
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