Export clang-format16 via ydblib project

6e6be3a95868fde888d801b7590af4044049563f

1 files changed, 50 insertions, 0 deletions

diff --git a/contrib/libs/clang16/lib/Analysis/PostOrderCFGView.cpp b/contrib/libs/clang16/lib/Analysis/PostOrderCFGView.cpp
new file mode 100644
index 0000000000..0c09c0f97f
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+++ b/contrib/libs/clang16/lib/Analysis/PostOrderCFGView.cpp
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+//===- PostOrderCFGView.cpp - Post order view of CFG blocks ---------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements post order view of the blocks in a CFG.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Analysis/Analyses/PostOrderCFGView.h"
+#include "clang/Analysis/AnalysisDeclContext.h"
+#include "clang/Analysis/CFG.h"
+
+using namespace clang;
+
+void PostOrderCFGView::anchor() {}
+
+PostOrderCFGView::PostOrderCFGView(const CFG *cfg) {
+  Blocks.reserve(cfg->getNumBlockIDs());
+  CFGBlockSet BSet(cfg);
+
+  for (po_iterator I = po_iterator::begin(cfg, BSet),
+                   E = po_iterator::end(cfg, BSet); I != E; ++I) {
+    BlockOrder[*I] = Blocks.size() + 1;
+    Blocks.push_back(*I);
+  }
+}
+
+std::unique_ptr<PostOrderCFGView>
+PostOrderCFGView::create(AnalysisDeclContext &ctx) {
+  const CFG *cfg = ctx.getCFG();
+  if (!cfg)
+    return nullptr;
+  return std::make_unique<PostOrderCFGView>(cfg);
+}
+
+const void *PostOrderCFGView::getTag() { static int x; return &x; }
+
+bool PostOrderCFGView::BlockOrderCompare::operator()(const CFGBlock *b1,
+                                                     const CFGBlock *b2) const {
+  PostOrderCFGView::BlockOrderTy::const_iterator b1It = POV.BlockOrder.find(b1);
+  PostOrderCFGView::BlockOrderTy::const_iterator b2It = POV.BlockOrder.find(b2);
+
+  unsigned b1V = (b1It == POV.BlockOrder.end()) ? 0 : b1It->second;
+  unsigned b2V = (b2It == POV.BlockOrder.end()) ? 0 : b2It->second;
+  return b1V > b2V;
+}