More then one anonymous aggregates on one line creates chaos when MDNode uniquness is combined with RAUW operation. Right solution is to avoid using RAUW.

This fixes PR 6554.

llvm-svn: 98083

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/2010-03-09-AnonAggregate.cpp b/clang/test/CodeGenCXX/2010-03-09-AnonAggregate.cpp
new file mode 100644
index 00000000000..99883d82636
--- /dev/null
+++ b/clang/test/CodeGenCXX/2010-03-09-AnonAggregate.cpp
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -g -S -o %t %s
+// PR: 6554
+// More then one anonymous aggregates on one line creates chaos when MDNode uniquness is 
+// combined with RAUW operation.
+// This test case causes crashes if malloc is configured to trip buffer overruns.
+class MO {
+
+  union {       struct {       union {    int BA;       } Val;       int Offset;     } OffsetedInfo;   } Contents; 
+
+};
+
+class MO m;