[analyzer] Print function name when dumping its CFG.

This allows us to use CHECK-LABEL to ensure that we're checking the right CFG.

Debugging change only.

llvm-svn: 199320
diff --git a/clang/lib/StaticAnalyzer/Checkers/DebugCheckers.cpp b/clang/lib/StaticAnalyzer/Checkers/DebugCheckers.cpp
index a2c8d1f..51e7a3d 100644
--- a/clang/lib/StaticAnalyzer/Checkers/DebugCheckers.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/DebugCheckers.cpp
@@ -95,6 +95,11 @@
 public:
   void checkASTCodeBody(const Decl *D, AnalysisManager& mgr,
                         BugReporter &BR) const {
+    PrintingPolicy Policy(mgr.getLangOpts());
+    Policy.TerseOutput = true;
+    Policy.PolishForDeclaration = true;
+    D->print(llvm::errs(), Policy);
+
     if (CFG *cfg = mgr.getCFG(D)) {
       cfg->dump(mgr.getLangOpts(),
                 llvm::sys::Process::StandardErrHasColors());