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88bc490380
I am getting rid of FunctionSignatureOptUtils. It is only used by FunctionSignatureOpts, so it should either be a local utility file whose header lives in ./lib or integrated into FunctionSignatureOpts. Beyond this utility function (which seems like a generally useful thing that should be in DebugUtils), the only other thing left in FunctionSignatureOptUtils is part of the heuristic of FunctionSignatureOpts. It should really be in that file. rdar://38196046
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//===--- DebugUtils.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 - 2018 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/SIL/DebugUtils.h"
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#include "swift/Basic/STLExtras.h"
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#include "swift/SIL/SILArgument.h"
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#include "swift/SIL/SILInstruction.h"
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#include "llvm/ADT/PointerIntPair.h"
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#include "llvm/ADT/SmallPtrSet.h"
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using namespace swift;
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bool swift::hasNonTrivialNonDebugTransitiveUsers(
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PointerUnion<SILInstruction *, SILArgument *> V) {
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llvm::SmallVector<SILInstruction *, 8> Worklist;
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llvm::SmallPtrSet<SILInstruction *, 8> SeenInsts;
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// Initialize our worklist.
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if (auto *A = V.dyn_cast<SILArgument *>()) {
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for (Operand *Op : getNonDebugUses(SILValue(A))) {
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auto *User = Op->getUser();
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if (!SeenInsts.insert(User).second)
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continue;
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Worklist.push_back(User);
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}
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} else {
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auto *I = V.get<SILInstruction *>();
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SeenInsts.insert(I);
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Worklist.push_back(I);
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}
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while (!Worklist.empty()) {
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SILInstruction *U = Worklist.pop_back_val();
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assert(SeenInsts.count(U) &&
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"Worklist should only contain seen instructions?!");
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// If U is a terminator inst, return false.
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if (isa<TermInst>(U))
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return true;
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// If U has side effects...
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if (U->mayHaveSideEffects())
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return true;
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// Otherwise add all non-debug uses of I that we have not seen yet to the
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// worklist.
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for (SILValue Result : U->getResults()) {
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for (Operand *I : getNonDebugUses(Result)) {
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auto *User = I->getUser();
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if (!SeenInsts.insert(User).second)
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continue;
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Worklist.push_back(User);
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}
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}
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}
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return false;
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}
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