From: Marcin Swiderski <marcin.sfider@gmail.com>
Date: Thu, 30 Sep 2010 22:54:37 +0000 (+0000)
Subject: Added methods for inserting CFGAutomaticObjDtors to CFGBlocks,
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=53de134e7b4686eed40bc031438d8a4560a2cda4;p=clang

Added methods for inserting CFGAutomaticObjDtors to CFGBlocks,
Fixed some misspells in comments.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@115236 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Analysis/CFG.h b/include/clang/Analysis/CFG.h
index e0719feed0..3960f51704 100644
--- a/include/clang/Analysis/CFG.h
+++ b/include/clang/Analysis/CFG.h
@@ -124,7 +124,7 @@ public:
   }
 };
 
-/// CFGImplicitDtor - Represents C++ object destructor imlicitly generated
+/// CFGImplicitDtor - Represents C++ object destructor implicitly generated
 /// by compiler on various occasions.
 class CFGImplicitDtor : public CFGElement {
 protected:
@@ -221,6 +221,11 @@ class CFGBlock {
     typedef ImplTy::const_iterator                        const_reverse_iterator;
   
     void push_back(CFGElement e, BumpVectorContext &C) { Impl.push_back(e, C); }
+    reverse_iterator insert(reverse_iterator I, size_t Cnt, CFGElement E,
+        BumpVectorContext& C) {
+      return Impl.insert(I, Cnt, E, C);
+    }
+
     CFGElement front() const { return Impl.back(); }
     CFGElement back() const { return Impl.front(); }
     
@@ -427,6 +432,18 @@ public:
   void appendStmt(Stmt* Statement, BumpVectorContext &C, bool asLValue) {
     Elements.push_back(CFGStmt(Statement, asLValue), C);
   }
+  
+  // Destructors must be inserted in reversed order. So insertion is in two
+  // steps. First we prepare space for some number of elements, then we insert
+  // the elements beginning at the last position in prepared space.
+  iterator beginAutomaticObjDtorsInsert(iterator I, size_t Cnt,
+      BumpVectorContext& C) {
+    return iterator(Elements.insert(I.base(), Cnt, CFGElement(), C));
+  }
+  iterator insertAutomaticObjDtor(iterator I, VarDecl* VD, Stmt* S) {
+    *I = CFGAutomaticObjDtor(VD, S);
+    return ++I;
+  }
 };
 
 /// CFG - Represents a source-level, intra-procedural CFG that represents the
diff --git a/lib/Analysis/CFG.cpp b/lib/Analysis/CFG.cpp
index 912d1edc3c..d82704d1f5 100644
--- a/lib/Analysis/CFG.cpp
+++ b/lib/Analysis/CFG.cpp
@@ -310,6 +310,13 @@ private:
     B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue());
   }
 
+  void insertAutomaticObjDtors(CFGBlock* Blk, CFGBlock::iterator I,
+    LocalScope::const_iterator B, LocalScope::const_iterator E, Stmt* S);
+  void appendAutomaticObjDtors(CFGBlock* Blk, LocalScope::const_iterator B,
+      LocalScope::const_iterator E, Stmt* S);
+  void prependAutomaticObjDtorsWithTerminator(CFGBlock* Blk,
+      LocalScope::const_iterator B, LocalScope::const_iterator E);
+
   void AddSuccessor(CFGBlock *B, CFGBlock *S) {
     B->addSuccessor(S, cfg->getBumpVectorContext());
   }
@@ -447,6 +454,36 @@ CFGBlock* CFGBuilder::createBlock(bool add_successor) {
   return B;
 }
 
+/// insertAutomaticObjDtors - Insert destructor CFGElements for variables with
+/// automatic storage duration to CFGBlock's elements vector. Insertion will be
+/// performed in place specified with iterator.
+void CFGBuilder::insertAutomaticObjDtors(CFGBlock* Blk, CFGBlock::iterator I,
+    LocalScope::const_iterator B, LocalScope::const_iterator E, Stmt* S) {
+  BumpVectorContext& C = cfg->getBumpVectorContext();
+  I = Blk->beginAutomaticObjDtorsInsert(I, B.distance(E), C);
+  while (B != E)
+    I = Blk->insertAutomaticObjDtor(I, *B++, S);
+}
+
+/// appendAutomaticObjDtors - Append destructor CFGElements for variables with
+/// automatic storage duration to CFGBlock's elements vector. Elements will be
+/// appended to physical end of the vector which happens to be logical
+/// beginning.
+void CFGBuilder::appendAutomaticObjDtors(CFGBlock* Blk,
+    LocalScope::const_iterator B, LocalScope::const_iterator E, Stmt* S) {
+  insertAutomaticObjDtors(Blk, Blk->begin(), B, E, S);
+}
+
+/// prependAutomaticObjDtorsWithTerminator - Prepend destructor CFGElements for
+/// variables with automatic storage duration to CFGBlock's elements vector.
+/// Elements will be prepended to physical beginning of the vector which
+/// happens to be logical end. Use blocks terminator as statement that specifies
+/// destructors call site.
+void CFGBuilder::prependAutomaticObjDtorsWithTerminator(CFGBlock* Blk,
+    LocalScope::const_iterator B, LocalScope::const_iterator E) {
+  insertAutomaticObjDtors(Blk, Blk->end(), B, E, Blk->getTerminator());
+}
+
 /// Visit - Walk the subtree of a statement and add extra
 ///   blocks for ternary operators, &&, and ||.  We also process "," and
 ///   DeclStmts (which may contain nested control-flow).