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81107e4235
MemoryBehaviorVisitor - Also, compute use points for destroy_value - Cleanup explicit checks for refcount instructions in RLE
110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
//===--- EscapeAnalysisDumper.cpp - Dumps the escape analysis -------------===//
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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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#define DEBUG_TYPE "dump-ea"
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#include "swift/SILOptimizer/Analysis/EscapeAnalysis.h"
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#include "swift/SILOptimizer/PassManager/Passes.h"
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#include "swift/SILOptimizer/PassManager/Transforms.h"
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#include "llvm/Support/CommandLine.h"
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using namespace swift;
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// For manual debugging, dump graphs in DOT format.
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static llvm::cl::opt<bool> EnableGraphWriter(
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"escapes-enable-graphwriter", llvm::cl::init(false),
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llvm::cl::desc("With -escapes-dump, also write .dot files."));
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namespace {
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static bool gatherValues(EscapeAnalysis *EA, SILFunction &Fn,
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std::vector<SILValue> &Values) {
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for (auto &BB : Fn) {
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for (auto *Arg : BB.getArguments()) {
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if (EA->isPointer(Arg))
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Values.push_back(SILValue(Arg));
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}
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for (auto &II : BB) {
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for (auto result : II.getResults()) {
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if (EA->isPointer(result))
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Values.push_back(result);
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}
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}
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}
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return Values.size() > 1;
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}
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/// Dumps the escape information of all functions in the module.
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/// Only dumps if the compiler is built with assertions.
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/// For details see EscapeAnalysis.
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class EscapeAnalysisDumper : public SILModuleTransform {
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void run() override {
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LLVM_DEBUG(llvm::dbgs() << "** EscapeAnalysisDumper **\n");
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#ifndef NDEBUG
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auto *EA = PM->getAnalysis<EscapeAnalysis>();
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llvm::outs() << "Escape information of module\n";
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for (auto &F : *getModule()) {
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if (!F.isExternalDeclaration()) {
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auto *ConnectionGraph = EA->getConnectionGraph(&F);
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ConnectionGraph->print(llvm::outs());
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if (EnableGraphWriter)
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ConnectionGraph->dumpCG();
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// Gather up all Values in Fn.
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std::vector<SILValue> Values;
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if (!gatherValues(EA, F, Values))
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continue;
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// Emit the N^2 escape analysis evaluation of the values.
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for (auto &bb : F) {
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for (auto &ii : bb) {
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if (auto fas = FullApplySite::isa(&ii)) {
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for (unsigned i = 0, e = Values.size(); i != e; ++i) {
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SILValue val = Values[i];
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bool escape = EA->canEscapeTo(val, fas);
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llvm::outs() << (escape ? "May" : "No") << "Escape: " << val
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<< " to " << ii;
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}
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}
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if (RefCountingInst *rci = dyn_cast<RefCountingInst>(&ii)) {
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for (unsigned i = 0, e = Values.size(); i != e; ++i) {
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SILValue val = Values[i];
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bool escape = EA->canEscapeTo(val, rci);
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llvm::outs() << (escape ? "May" : "No") << "Escape: " << val
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<< " to " << ii;
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}
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}
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if (DestroyValueInst *dvi = dyn_cast<DestroyValueInst>(&ii)) {
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for (unsigned i = 0, e = Values.size(); i != e; ++i) {
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SILValue val = Values[i];
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bool escape = EA->canEscapeTo(val, dvi);
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llvm::outs() << (escape ? "May" : "No") << "Escape: " << val
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<< " to " << ii;
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}
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}
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}
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}
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}
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}
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#endif
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}
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};
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} // end anonymous namespace
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SILTransform *swift::createEscapeAnalysisDumper() {
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return new EscapeAnalysisDumper();
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}
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