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be1881aa1f
At some point, pass definitions were heavily macro-ized. Pass descriptive names were added in two places. This is not only redundant but a source of confusion. You could waste a lot of time grepping for the wrong string. I removed all the getName() overrides which, at around 90 passes, was a fairly significant amount of code bloat. Any pass that we want to be able to invoke by name from a tool (sil-opt) or pipeline plan *should* have unique type name, enum value, commend-line string, and name string. I removed a comment about the various inliner passes that contradicted that. Side note: We should be consistent with the policy that a pass is identified by its type. We have a couple passes, LICM and CSE, which currently violate that convention.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
//===--- LoopCanonicalizer.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 - 2017 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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///
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/// \file
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/// This is a simple pass that can be used to apply loop canonicalizations to a
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/// cfg. It also enables loop canonicalizations to be tested via FileCheck.
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///
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "sil-loop-canonicalizer"
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#include "swift/SILOptimizer/PassManager/Passes.h"
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#include "swift/SILOptimizer/Analysis/Analysis.h"
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#include "swift/SILOptimizer/Analysis/DominanceAnalysis.h"
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#include "swift/SILOptimizer/Analysis/LoopAnalysis.h"
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#include "swift/SILOptimizer/PassManager/Transforms.h"
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#include "swift/SILOptimizer/Utils/LoopUtils.h"
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using namespace swift;
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namespace {
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class LoopCanonicalizer : public SILFunctionTransform {
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void run() override {
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SILFunction *F = getFunction();
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DEBUG(llvm::dbgs() << "Attempt to canonicalize loops in " << F->getName()
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<< "\n");
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auto *LA = PM->getAnalysis<SILLoopAnalysis>();
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auto *LI = LA->get(F);
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if (LI->empty()) {
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DEBUG(llvm::dbgs() << " No loops to canonicalize!\n");
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return;
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}
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auto *DA = PM->getAnalysis<DominanceAnalysis>();
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auto *DI = DA->get(F);
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if (canonicalizeAllLoops(DI, LI)) {
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// We preserve loop info and the dominator tree.
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DA->lockInvalidation();
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LA->lockInvalidation();
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PM->invalidateAnalysis(F, SILAnalysis::InvalidationKind::FunctionBody);
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DA->unlockInvalidation();
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LA->unlockInvalidation();
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}
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}
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};
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} // end anonymous namespace
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//===----------------------------------------------------------------------===//
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// Top Level Entrypoint
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//===----------------------------------------------------------------------===//
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SILTransform *swift::createLoopCanonicalizer() {
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return new LoopCanonicalizer();
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}
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