| 1 | //===- SymbolPrivatize.cpp - Pass to mark symbols private -----------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file implements an pass that marks all symbols as private unless |
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| 10 | // excluded. |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | |
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| 14 | #include "mlir/Transforms/Passes.h" |
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| 15 | |
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| 16 | #include "mlir/IR/SymbolTable.h" |
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| 17 | |
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| 18 | namespace mlir { |
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| 19 | #define GEN_PASS_DEF_SYMBOLPRIVATIZE |
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| 20 | #include "mlir/Transforms/Passes.h.inc" |
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| 21 | } // namespace mlir |
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| 22 | |
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| 23 | using namespace mlir; |
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| 24 | |
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| 25 | namespace { |
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| 26 | struct SymbolPrivatize : public impl::SymbolPrivatizeBase<SymbolPrivatize> { |
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| 27 | explicit SymbolPrivatize(ArrayRef<std::string> excludeSymbols); |
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| 28 | LogicalResult initialize(MLIRContext *context) override; |
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| 29 | void runOnOperation() override; |
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| 30 | |
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| 31 | /// Symbols whose visibility won't be changed. |
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| 32 | DenseSet<StringAttr> excludedSymbols; |
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| 33 | }; |
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| 34 | } // namespace |
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| 35 | |
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| 36 | SymbolPrivatize::SymbolPrivatize(llvm::ArrayRef<std::string> excludeSymbols) { |
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| 37 | exclude = excludeSymbols; |
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| 38 | } |
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| 39 | |
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| 40 | LogicalResult SymbolPrivatize::initialize(MLIRContext *context) { |
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| 41 | for (const std::string &symbol : exclude) |
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| 42 | excludedSymbols.insert(StringAttr::get(context, symbol)); |
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| 43 | return success(); |
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| 44 | } |
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| 45 | |
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| 46 | void SymbolPrivatize::runOnOperation() { |
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| 47 | for (Region ®ion : getOperation()->getRegions()) { |
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| 48 | for (Block &block : region) { |
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| 49 | for (Operation &op : block) { |
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| 50 | auto symbol = dyn_cast<SymbolOpInterface>(op); |
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| 51 | if (!symbol) |
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| 52 | continue; |
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| 53 | if (!excludedSymbols.contains(symbol.getNameAttr())) |
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| 54 | symbol.setVisibility(SymbolTable::Visibility::Private); |
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| 55 | } |
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| 56 | } |
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| 57 | } |
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| 58 | } |
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| 59 | |
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| 60 | std::unique_ptr<Pass> |
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| 61 | mlir::createSymbolPrivatizePass(ArrayRef<std::string> exclude) { |
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| 62 | return std::make_unique<SymbolPrivatize>(args&: exclude); |
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| 63 | } |
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| 64 | |
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