[compiler-rt] [llvm] [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 llvm-commits]

================
@@ -215,6 +215,15 @@ cl::opt<bool> DoInstrProfNameCompression(
     "enable-name-compression",
     cl::desc("Enable name/filename string compression"), cl::init(true));
 
+cl::opt<bool> EnableVTableValueProfiling(
+    "enable-vtable-value-profiling", cl::init(false),
+    cl::desc("If true, the virtual table address will be instrumented to know "
+             "the types of a C++ pointer. The information could be used in "
+             "indirect-call-promotion to do selective vtable-based comparison "
+             "and interprocedural type propagation. Requires type metadata and "
+             "type intrinsics (https://llvm.org/docs/TypeMetadata.html) to use"
----------------
minglotus-6 wrote:

they are not required. Update the comment.

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