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

[Snehasish Kumar via llvm-commits]

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@@ -560,42 +609,79 @@ Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
       NameStrs, compression::zlib::isAvailable() && doCompression, Result);
 }
 
-Error readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab) {
+Error collectVTableStrings(ArrayRef<GlobalVariable *> VTables,
+                           std::string &Result, bool doCompression) {
+  std::vector<std::string> VTableNameStrs;
+  for (auto *VTable : VTables) {
+    VTableNameStrs.push_back(getPGOName(*VTable));
+  }
+  return collectGlobalObjectNameStrings(
+      VTableNameStrs, compression::zlib::isAvailable() && doCompression,
+      Result);
+}
+
+instrprof_error decodeAndSplitStrings(
+    const uint8_t *Input, SmallVector<uint8_t, 128> &UncompressedNameStrings,
+    StringRef &NameStrings, uint32_t &Dist, bool &isCompressed) {
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snehasish wrote:

nit: IsCompressed

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