[-Wunreachabe-code] Don't warn about unreachable destructors for temporaries.

This can possibly be refined later, but right now the experience
is so incomprehensible for a user to understand what is going on
this isn't a useful warning.

llvm-svn: 203336

1 files changed, 5 insertions, 3 deletions

diff --git a/clang/lib/Analysis/ReachableCode.cpp b/clang/lib/Analysis/ReachableCode.cpp
index 5d74156092c..9191958399b 100644
--- a/clang/lib/Analysis/ReachableCode.cpp
+++ b/clang/lib/Analysis/ReachableCode.cpp
@@ -397,9 +397,11 @@ const Stmt *DeadCodeScan::findDeadCode(const clang::CFGBlock *Block) {
     }
 
   if (CFGTerminator T = Block->getTerminator()) {
-    const Stmt *S = T.getStmt();
-    if (isValidDeadStmt(S))
-      return S;
+    if (!T.isTemporaryDtorsBranch()) {
+      const Stmt *S = T.getStmt();
+      if (isValidDeadStmt(S))
+        return S;
+    }
   }
 
   return 0;