Introduce new CFGElement hierarchy to support C++ CFG, based on Marcin's patch

and discussions with Ted and Jordy.

llvm-svn: 114056

1 files changed, 9 insertions, 5 deletions

diff --git a/clang/lib/Analysis/ReachableCode.cpp b/clang/lib/Analysis/ReachableCode.cpp
index eb3f7d4..0088264 100644
--- a/clang/lib/Analysis/ReachableCode.cpp
+++ b/clang/lib/Analysis/ReachableCode.cpp
@@ -31,9 +31,13 @@ static SourceLocation GetUnreachableLoc(const CFGBlock &b, SourceRange &R1,
   R1 = R2 = SourceRange();
 
 top:
-  if (sn < b.size())
-    S = b[sn].getStmt();
-  else if (b.getTerminator())
+  if (sn < b.size()) {
+    CFGStmt CS = b[sn].getAs<CFGStmt>();
+    if (!CS)
+      goto top;
+    
+    S = CS.getStmt(); 
+  } else if (b.getTerminator())
     S = b.getTerminator();
   else
     return SourceLocation();
@@ -43,7 +47,7 @@ top:
       const BinaryOperator *BO = cast<BinaryOperator>(S);
       if (BO->getOpcode() == BO_Comma) {
         if (sn+1 < b.size())
-          return b[sn+1].getStmt()->getLocStart();
+          return b[sn+1].getAs<CFGStmt>().getStmt()->getLocStart();
         const CFGBlock *n = &b;
         while (1) {
           if (n->getTerminator())
@@ -54,7 +58,7 @@ top:
           if (n->pred_size() != 1)
             return SourceLocation();
           if (!n->empty())
-            return n[0][0].getStmt()->getLocStart();
+            return n[0][0].getAs<CFGStmt>().getStmt()->getLocStart();
         }
       }
       R1 = BO->getLHS()->getSourceRange();