mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Giacomo Vercesi
ab125b35b0
Change company name to "rev.ng Labs Srl" in all license headers to reflect changed company name and legal status Add missing license headers to files that didn't have one
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
//
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// Copyright (c) rev.ng Labs Srl. See LICENSE.md for details.
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//
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#include "DLAStep.h"
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bool dla::RemoveInvalidPointers::runOnTypeSystem(LayoutTypeSystem &TS) {
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bool Changed = false;
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for (LayoutTypeSystemNode *PtrNode : llvm::nodes(&TS)) {
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// Nodes whose size is the same of a pointer cannot have invalid outgoind
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// pointer edges.
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if (PtrNode->Size == PointerSize)
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continue;
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auto It = PtrNode->Successors.begin();
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auto End = PtrNode->Successors.end();
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auto Next = End;
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for (; It != End; It = Next) {
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Next = std::next(It);
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// Ignore non-pointer edges
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if (not isPointerEdge(*It))
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continue;
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// If we reach this point PtrNode->Size is different from a pointer size
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// and It points to a pointer edge that is outgoing from PtrNode.
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// That edge is invalid, because according to PtrNode->Size PtrNode cannot
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// be a pointer, so we remove the wrong edge.
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LayoutTypeSystemNode *Pointee = It->first;
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auto PredIt = Pointee->Predecessors.find({ PtrNode, It->second });
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revng_assert(PredIt != Pointee->Predecessors.end());
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Pointee->Predecessors.erase(PredIt);
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PtrNode->Successors.erase(It);
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Changed = true;
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}
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}
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return Changed;
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}
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