mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Alvise de Faveri
47db3fdb11
While doing thie, also drop `printAccessNode()` from DLA DebugPrinter. The information about which LLVM instruction originated a given access node is already available in the csv generated by the `dla-accesses-log` logger.
81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
//
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// Copyright (c) rev.ng Srls. See LICENSE.md for details.
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//
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#include <algorithm>
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#include <set>
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#include "llvm/ADT/PostOrderIterator.h"
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#include "revng/ADT/FilteredGraphTraits.h"
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#include "revng/Support/Debug.h"
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#include "revng-c/DataLayoutAnalysis/DLATypeSystem.h"
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#include "DLAStep.h"
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using namespace llvm;
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static Logger<> Log("dla-prune");
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namespace dla {
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bool PruneLayoutNodesWithoutLayout::runOnTypeSystem(LayoutTypeSystem &TS) {
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bool Changed = false;
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using LTSN = LayoutTypeSystemNode;
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if (Log.isEnabled())
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TS.dumpDotOnFile("before-prune.dot");
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if (VerifyLog.isEnabled())
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revng_assert(TS.verifyDAG() and TS.verifyInheritanceTree());
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std::set<const LTSN *> Visited;
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std::set<LTSN *> ToRemove;
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for (LTSN *Root : llvm::nodes(&TS)) {
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revng_assert(Root != nullptr);
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if (not isRoot(Root))
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continue;
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revng_log(Log, "# Starting from Root: " << Root->ID);
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for (LTSN *N : post_order_ext(Root, Visited)) {
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revng_log(Log, "## Visiting N: " << N->ID);
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revng_log(Log, "## Is Leaf: " << isLeaf(N));
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if (N->Size > 0) {
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revng_log(Log, "### has size " << N->Size << " !");
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continue;
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}
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using GT = GraphTraits<LTSN *>;
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if (std::any_of(GT::child_begin(N),
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GT::child_end(N),
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[&ToRemove](LTSN *Chld) {
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return ToRemove.count(Chld) == 0;
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})) {
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revng_log(Log, "### ChildHasLayout(N)!");
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continue;
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}
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// Here N does not have valid layout, nor any of its child has.
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revng_log(Log, "#### Queuing for removal: " << N->ID);
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ToRemove.insert(N);
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}
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}
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Changed = not ToRemove.empty();
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for (LTSN *N : ToRemove) {
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revng_log(Log, "# Removing: " << N->ID);
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TS.removeNode(N);
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}
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if (VerifyLog.isEnabled())
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revng_assert(TS.verifyDAG() and TS.verifyInheritanceTree()
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and TS.verifyLeafs());
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if (Log.isEnabled())
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TS.dumpDotOnFile("after-prune.dot");
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return Changed;
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}
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} // end namespace dla
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