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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
//===--- DeadEndBlocksAnalysis.cpp ----------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/SILOptimizer/Analysis/DeadEndBlocksAnalysis.h"
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#include "swift/SILOptimizer/OptimizerBridging.h"
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#include "swift/AST/Decl.h"
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#include "swift/Basic/Assertions.h"
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#include "swift/SIL/SILFunction.h"
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using namespace swift;
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void DeadEndBlocksAnalysis::verify(DeadEndBlocks *deBlocks) const {
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// If the passed in deBlocks has not computed, there is nothing to check.
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if (!deBlocks->isComputed())
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return;
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// Then create our new dead end blocks instance so we can check the internal
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// state of our input against it.
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auto *fn = deBlocks->getFunction();
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DeadEndBlocks newBlocks(fn);
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// Make sure that all values that deBlocks thinks is unreachable are
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// actually unreachable.
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//
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// NOTE: We verify like this b/c DeadEndBlocks looks up state lazily so we
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// can only check the work we have done so far.
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for (auto &block : *fn) {
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if (deBlocks->isDeadEnd(&block)) {
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if (!newBlocks.isDeadEnd(&block)) {
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llvm::errs() << "DeadEndBlocksAnalysis Error! Found dead end block "
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"that is no longer a dead end block?!";
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llvm_unreachable("standard error assertion");
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}
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} else {
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if (newBlocks.isDeadEnd(&block)) {
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llvm::errs() << "DeadEndBlocksAnalysis Error! Found reachable block "
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"that is no longer reachable?!";
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llvm_unreachable("standard error assertion");
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}
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}
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}
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}
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//===----------------------------------------------------------------------===//
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// Main Entry Point
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//===----------------------------------------------------------------------===//
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SILAnalysis *swift::createDeadEndBlocksAnalysis(SILModule *) {
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return new DeadEndBlocksAnalysis();
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}
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