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Show First 20 Lines • Show All 206 Lines • ▼ Show 20 Lines	func public @public_function() {
"foo.return"() {uses = [@live_private_function]} : () -> ()		"foo.return"() {uses = [@live_private_function]} : () -> ()
}		}
```		```

See [Symbols and SymbolTables](SymbolsAndSymbolTables.md) for more		See [Symbols and SymbolTables](SymbolsAndSymbolTables.md) for more
information on `Symbols`.		information on `Symbols`.
}];		}];
let constructor = "mlir::createSymbolDCEPass()";		let constructor = "mlir::createSymbolDCEPass()";

		let statistics = [
		Statistic<"numDCE", "num-dce'd", "Number of symbols DCE'd">,
		];
}		}

def SymbolPrivatize : Pass<"symbol-privatize"> {		def SymbolPrivatize : Pass<"symbol-privatize"> {
let summary = "Mark symbols private";		let summary = "Mark symbols private";
let description = [{		let description = [{
This pass marks all top-level symbols of the operation run as `private`		This pass marks all top-level symbols of the operation run as `private`
except if listed in `exclude` pass option.		except if listed in `exclude` pass option.
}];		}];
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mlir/lib/Transforms/SymbolDCE.cpp

Show First 20 Lines • Show All 56 Lines • ▼ Show 20 Lines	void SymbolDCE::runOnOperation() {

// After computing the liveness, delete all of the symbols that were found to		// After computing the liveness, delete all of the symbols that were found to
// be dead.		// be dead.
symbolTableOp->walk([&](Operation *nestedSymbolTable) {		symbolTableOp->walk([&](Operation *nestedSymbolTable) {
if (!nestedSymbolTable->hasTrait<OpTrait::SymbolTable>())		if (!nestedSymbolTable->hasTrait<OpTrait::SymbolTable>())
return;		return;
for (auto &block : nestedSymbolTable->getRegion(0)) {		for (auto &block : nestedSymbolTable->getRegion(0)) {
for (Operation &op : llvm::make_early_inc_range(block)) {		for (Operation &op : llvm::make_early_inc_range(block)) {
if (isa<SymbolOpInterface>(&op) && !liveSymbols.count(&op))		if (isa<SymbolOpInterface>(&op) && !liveSymbols.count(&op)) {
op.erase();		op.erase();
		++numDCE;
		}
}		}
}		}
});		});
}		}

/// Compute the liveness of the symbols within the given symbol table.		/// Compute the liveness of the symbols within the given symbol table.
/// `symbolTableIsHidden` is true if this symbol table is known to be		/// `symbolTableIsHidden` is true if this symbol table is known to be
/// unaccessible from operations in its parent regions.		/// unaccessible from operations in its parent regions.
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