[analyzer] Use a temporary builder in CheckerContext.

First step toward removing the global Stmt builder. Added several transitional methods (like takeNodes/addNodes).
+ Stop early if the set of exploded nodes for the next iteration is empty.

llvm-svn: 142827

1 files changed, 1 insertions, 7 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp b/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp
index 5f43b77ceb6..e4638b756c6 100644
--- a/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp
+++ b/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp
@@ -16,10 +16,4 @@
 using namespace clang;
 using namespace ento;
 
-CheckerContext::~CheckerContext() {
-  // Copy the results into the Dst set.
-  for (NodeBuilder::iterator I = NB.begin(),
-                             E = NB.end(); I != E; ++I) {
-    Dst.Add(*I);
-  }
-}
+CheckerContext::~CheckerContext() {}