[llvm] [BOLT] Support relative vtable (PR #135449)

[Maksim Panchenko via llvm-commits]

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@@ -0,0 +1,57 @@
+// Test bolt instrumentation is able to handle relative virtual function table,
+// i.e., when code is compiled with `-fexperimental-relative-c++-abi-vtables`.
+
+// REQUIRES: system-linux,bolt-runtime
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maksfb wrote:

Can drop `bolt-runtime` without instrumentation.

https://github.com/llvm/llvm-project/pull/135449