[PATCH] [ubsan] fix vptr test on ARM

[Richard Smith]

I see, the problem is that we're accidentally relying on the stack buffer 'Buffer' being 8-byte aligned.

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Comment at: test/ubsan/TestCases/TypeCheck/vptr.cpp:89
@@ -88,3 +88,3 @@
     // CHECK-NULL-MEMBER-NEXT: [[PTR]]: note: object has invalid vptr
-    // CHECK-NULL-MEMBER-NEXT: {{^ .. .. .. ..  00 00 00 00 00 00 00 00  }}
+    // CHECK-NULL-MEMBER-NEXT: {{^ ( )?.. .. .. .. ( )?00 00 00 00 (00 00 00 00 )? }}
     // CHECK-NULL-MEMBER-NEXT: {{^              \^~~~~~~~~~~(~~~~~~~~~~~~)? *$}}
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Please add an optional extra space between the two groups of 0s rather than making the second group optional.

You don't need the parens around the optional spaces.

http://reviews.llvm.org/D3751