Implement jump checking for initialized c++ variables, implementing

a fixme and PR6451.

Only perform jump checking if the containing function has no errors,
and add the infrastructure needed to do this.

On the testcase in the PR, we produce:

t.cc:6:3: error: illegal goto into protected scope
  goto later;
  ^
t.cc:7:5: note: jump bypasses variable initialization
  X x;
    ^

llvm-svn: 97497

1 files changed, 13 insertions, 1 deletions

diff --git a/clang/test/SemaCXX/statements.cpp b/clang/test/SemaCXX/statements.cpp
index 36982582fa1..852086ed9a9 100644
--- a/clang/test/SemaCXX/statements.cpp
+++ b/clang/test/SemaCXX/statements.cpp
@@ -1,5 +1,17 @@
-// RUN: %clang_cc1 %s -fsyntax-only -pedantic
+// RUN: %clang_cc1 %s -fsyntax-only -pedantic -verify
 
 void foo() { 
   return foo();
 }
+
+// PR6451 - C++ Jump checking
+struct X {
+  X();
+};
+
+void test2() {
+  goto later;  // expected-error {{illegal goto into protected scope}}
+  X x;         // expected-note {{jump bypasses variable initialization}} 
+later:
+  ;
+}