Add a utility method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96471 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 14 insertions, 0 deletions

diff --git a/include/clang/Analysis/AnalysisContext.h b/include/clang/Analysis/AnalysisContext.h
index ea4f5b2066..bde4417412 100644
--- a/include/clang/Analysis/AnalysisContext.h
+++ b/include/clang/Analysis/AnalysisContext.h
@@ -110,6 +110,8 @@ public:
 
   const LocationContext *getParent() const { return Parent; }
 
+  bool isParentOf(const LocationContext *LC) const;
+
   const Decl *getDecl() const { return getAnalysisContext()->getDecl(); }
 
   CFG *getCFG() const { return getAnalysisContext()->getCFG(); }
diff --git a/lib/Analysis/AnalysisContext.cpp b/lib/Analysis/AnalysisContext.cpp
index ccd5088f2e..d9933e85cb 100644
--- a/lib/Analysis/AnalysisContext.cpp
+++ b/lib/Analysis/AnalysisContext.cpp
@@ -186,6 +186,18 @@ LocationContext::getStackFrameForDeclContext(const DeclContext *DC) const {
   return NULL;
 }
 
+bool LocationContext::isParentOf(const LocationContext *LC) const {
+  do {
+    const LocationContext *Parent = LC->getParent();
+    if (Parent == this)
+      return true;
+    else
+      LC = Parent;
+  } while (LC);
+
+  return false;
+}
+
 //===----------------------------------------------------------------------===//
 // Lazily generated map to query the external variables referenced by a Block.
 //===----------------------------------------------------------------------===//