It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/C++Frontend/2006-10-30-ClassBitfield.cpp b/test/C++Frontend/2006-10-30-ClassBitfield.cpp
new file mode 100644
index 0000000..bd3b173
--- /dev/null
+++ b/test/C++Frontend/2006-10-30-ClassBitfield.cpp
@@ -0,0 +1,16 @@
+// RUN: %llvmgxx %s -emit-llvm -S -o -
+// PR954
+
+struct _Refcount_Base {
+ unsigned long _M_ref_count;
+ int _M_ref_count_lock;
+ _Refcount_Base() : _M_ref_count(0) {}
+};
+
+struct _Rope_RopeRep : public _Refcount_Base
+{
+public:
+ int _M_tag:8;
+};
+
+int foo(_Rope_RopeRep* r) { return r->_M_tag; }