45a91c1521
Previously this would produce many invalid reductions with "Instruction does not dominate uses" verifier errors. This fixes issues in cases where the incoming IR has unreachable blocks, and the resulting reduction introduced new reachable blocks. Have basic-blocks skip functions that have unreachable blocks, Introduce a separate reduction which only deletes unreachable blocks. Cleanup any newly unreachable blocks after trimming out the requested deletions. Includes a variety of meta-reduced tests for llvm-reduce itself with -abort-on-invalid-reduction that were failing on different iterations of this patch. Bugpoint's implementation is much simpler (but currently I don't understand how it avoids disconnecting interesting blocks from the CFG).
26 lines
987 B
C++
26 lines
987 B
C++
//===- ReduceArguments.h - Specialized Delta Pass ---------------*- 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 implements a function which calls the Generic Delta pass in order
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// to reduce uninteresting BasicBlocks from defined functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_REDUCE_DELTAS_REDUCEBASICBLOCKS_H
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#define LLVM_TOOLS_LLVM_REDUCE_DELTAS_REDUCEBASICBLOCKS_H
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#include "Delta.h"
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#include "llvm/Transforms/Utils/BasicBlockUtils.h"
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#include "llvm/Transforms/Utils/Cloning.h"
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namespace llvm {
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void reduceBasicBlocksDeltaPass(TestRunner &Test);
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void reduceUnreachableBasicBlocksDeltaPass(TestRunner &Test);
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} // namespace llvm
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#endif
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