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The old invalidation lattice was incorrect because changes to control flow could cause changes to the call graph, so we've decided to change the way passes invalidate analysis. In the new scheme, the lattice is replaced with a list of traits that passes preserve or invalidate. The current traits are Calls and Branches. Now, passes report which traits they preserve, which is the opposite of the previous implementation where passes needed to report what they invalidate. Node: I tried to limit the changes in this commit to mechanical changes to ease the review. I will cleanup some of the code in a following commit. Swift SVN r26449
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
//===-- Specializer.cpp ------ Performs Generic Specialization ------------===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "specialization"
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#include "swift/SILPasses/Utils/Generics.h"
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#include "swift/SILPasses/Passes.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/SIL/SILDebugScope.h"
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#include "swift/SIL/SILFunction.h"
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#include "swift/SIL/SILInstruction.h"
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#include "swift/SIL/SILModule.h"
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#include "swift/SILAnalysis/CallGraphAnalysis.h"
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#include "swift/SILPasses/Utils/Local.h"
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#include "swift/SILPasses/Transforms.h"
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/ADT/SmallString.h"
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using namespace swift;
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namespace {
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class SILGenericSpecializerTransform : public SILModuleTransform {
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public:
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SILGenericSpecializerTransform() {}
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void run() override {
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CallGraphAnalysis* CGA = PM->getAnalysis<CallGraphAnalysis>();
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// Collect a call-graph bottom-up list of functions and specialize the
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// functions in reverse order.
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auto &CG = CGA->getCallGraph();
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auto GS = GenericSpecializer(getModule());
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// Try to specialize generic calls.
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bool Changed = GS.specialize(CG.getBottomUpFunctionOrder());
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if (Changed) {
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// Schedule another iteration of the transformation pipe.
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PM->scheduleAnotherIteration();
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// Invalidate the call graph.
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invalidateAnalysis(SILAnalysis::PreserveKind::Nothing);
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}
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}
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StringRef getName() override { return "Generic Specialization"; }
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};
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} // end anonymous namespace
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SILTransform *swift::createGenericSpecializer() {
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return new SILGenericSpecializerTransform();
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}
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