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fd353df19e
We really only need the analysis to tell whether a function has caller inside the module or not. We do not need to know the callsites. Remove them for now to make the analysis more memory efficient. Add a note to indicate it can be extended.
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
//===--- CallerAnalysis.cpp - Determine callsites to a function ----------===//
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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 - 2016 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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#include "swift/SILOptimizer/Analysis/CallerAnalysis.h"
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#include "swift/Basic/Fallthrough.h"
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#include "swift/SIL/SILModule.h"
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#include "swift/SILOptimizer/Utils/Local.h"
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using namespace swift;
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void CallerAnalysis::processFunctionCallSites(SILFunction *F) {
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// Scan the whole module and search Apply sites.
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for (auto &BB : *F) {
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for (auto &II : BB) {
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if (auto Apply = FullApplySite::isa(&II)) {
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SILFunction *CalleeFn = Apply.getCalleeFunction();
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if (!CalleeFn)
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continue;
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// Update the callee information for this function.
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CallerAnalysisFunctionInfo &CallerInfo
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= CallInfo.FindAndConstruct(F).second;
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CallerInfo.Callees.insert(CalleeFn);
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// Update the callsite information for the callee.
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CallerAnalysisFunctionInfo &CalleeInfo
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= CallInfo.FindAndConstruct(CalleeFn).second;
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CalleeInfo.Callers.insert(F);
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}
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}
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}
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}
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void CallerAnalysis::invalidateExistingCalleeRelation(SILFunction *F) {
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CallerAnalysisFunctionInfo &CallerInfo = CallInfo.FindAndConstruct(F).second;
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for (auto Callee : CallerInfo.Callees) {
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CallerAnalysisFunctionInfo &CalleeInfo
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= CallInfo.FindAndConstruct(Callee).second;
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CalleeInfo.Callers.remove(F);
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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::createCallerAnalysis(SILModule *M) {
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return new CallerAnalysis(M);
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}
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