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When cloning an op, the `notifyOperationInserted` callback is triggered for all nested ops. Similarly, the `notifyOperationRemoved` callback should be triggered for all nested ops when removing an op. Listeners may inspect the IR during a `notifyOperationRemoved` callback. Therefore, when multiple ops are removed in a single `RewriterBase::eraseOp` call, the notifications must be triggered in an order in which the ops could have been removed one-by-one: * Op removals must be interleaved with `notifyOperationRemoved` callbacks. A callback is triggered right before the respective op is removed. * Ops are removed post-order and in reverse order. Other traversal orders could delete an op that still has uses. (This is not avoidable in graph regions and with cyclic block graphs.) Differential Revision: Imported from https://reviews.llvm.org/D144193.
35 lines
1.2 KiB
C++
35 lines
1.2 KiB
C++
//===- RegionKindInterface.cpp - Region Kind Interfaces ---------*- C++ -*-===//
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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 contains the definitions of the region kind interfaces defined in
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// `RegionKindInterface.td`.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/IR/RegionKindInterface.h"
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using namespace mlir;
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#include "mlir/IR/RegionKindInterface.cpp.inc"
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bool mlir::mayHaveSSADominance(Region ®ion) {
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auto regionKindOp = dyn_cast<RegionKindInterface>(region.getParentOp());
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if (!regionKindOp)
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return true;
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return regionKindOp.hasSSADominance(region.getRegionNumber());
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}
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bool mlir::mayBeGraphRegion(Region ®ion) {
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if (!region.getParentOp()->isRegistered())
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return true;
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auto regionKindOp = dyn_cast<RegionKindInterface>(region.getParentOp());
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if (!regionKindOp)
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return false;
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return !regionKindOp.hasSSADominance(region.getRegionNumber());
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}
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