[clang] [IRPGO][ValueProfile] Instrument virtual table address that could be used to do virtual table address comparision for indirect-call-promotion. (PR #66825)

[Mingming Liu via cfe-commits]

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@@ -177,13 +195,22 @@ VALUE_PROF_FUNC_PARAM(uint32_t, CounterIndex, Type::getInt32Ty(Ctx))
 VALUE_PROF_KIND(IPVK_IndirectCallTarget, 0, "indirect call target")
 /* For memory intrinsic functions size profiling. */
 VALUE_PROF_KIND(IPVK_MemOPSize, 1, "memory intrinsic functions size")
+/* For virtual table address profiling, the addresses of the virtual table (i.e., the address contained in objects pointing to a virtual table) are
+ * profiled. Note this may not be the address of the per C++ class virtual table object (i.e., there is an offset).
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minglotus-6 wrote:

done.

https://github.com/llvm/llvm-project/pull/66825