Patch to avoid duplicate declaration of byref structs

for __block variables of same name declared in multiple scopes.
Fixes radar 7540194


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93474 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 35 insertions, 0 deletions

diff --git a/test/Rewriter/rewrite-byref-vars.mm b/test/Rewriter/rewrite-byref-vars.mm
new file mode 100644
index 0000000000..581437b5a5
--- /dev/null
+++ b/test/Rewriter/rewrite-byref-vars.mm
@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 -fms-extensions -rewrite-objc -x objective-c++ -fblocks -o - %s
+// radar 7540194
+
+extern "C" __declspec(dllexport) void BreakTheRewriter(int i) {
+        __block int aBlockVariable = 0;
+        void (^aBlock)(void) = ^ {
+                aBlockVariable = 42;
+        };
+        aBlockVariable++;
+	if (i) {
+	  __block int bbBlockVariable = 0;
+	  void (^aBlock)(void) = ^ {
+                bbBlockVariable = 42;
+          };
+        }
+}
+
+__declspec(dllexport) extern "C" __declspec(dllexport) void XXXXBreakTheRewriter(void) {
+
+        __block int aBlockVariable = 0;
+        void (^aBlock)(void) = ^ {
+                aBlockVariable = 42;
+        };
+        aBlockVariable++;
+        void (^bBlocks)(void) = ^ {
+                aBlockVariable = 43;
+        };
+        void (^c)(void) = ^ {
+                aBlockVariable = 44;
+        };
+
+}
+
+// $CLANG -cc1 -fms-extensions -rewrite-objc -x objective-c++ -fblocks bug.mm
+// g++ -c -D"__declspec(X)=" bug.cpp