[llvm-branch-commits] [llvm] [InstrProf] Add vtables with type metadata into symtab to look it up with GUID (PR #81051)

[Mingming Liu via llvm-branch-commits]

================
@@ -479,15 +479,37 @@ Error InstrProfSymtab::create(Module &M, bool InLTO) {
       continue;
     Types.clear();
     G.getMetadata(LLVMContext::MD_type, Types);
-    if (!Types.empty()) {
-      MD5VTableMap.emplace_back(G.getGUID(), &G);
-    }
+    if (Types.empty())
+      continue;
+    if (Error E = addVTableWithName(
+              G, getIRPGOObjectName(G, InLTO, /* PGONameMetadata */ nullptr)))
+        return E;
   }
   Sorted = false;
   finalizeSymtab();
   return Error::success();
 }
 
+Error InstrProfSymtab::addVTableWithName(GlobalVariable &VTable,
+                                         StringRef VTablePGOName) {
+                                          
+  auto mapName = [&](StringRef Name) -> Error {
+    if (Error E = addVTableName(Name))
----------------
minglotus-6 wrote:

This is 
[defined](https://github.com/llvm/llvm-project/pull/66825/files#diff-da37bd91946b34b8d50ced64d8e9f79455b61e8d29b304d0ae9fe3148bc63333R556-R564)
 in InstrProf.h in the PR to instrument vtables and 
[used](https://github.com/llvm/llvm-project/pull/66825/files#diff-da37bd91946b34b8d50ced64d8e9f79455b61e8d29b304d0ae9fe3148bc63333R642-R645)
 to add vtable strings from raw profiles (`InstrProfSymtab::create` called 
[here](https://github.com/llvm/llvm-project/pull/66825/files#diff-b196b796c5a396c7cdf93b347fe47e2b29b72d0b7dd0e2b88abb964d376ee50eR544-R545))

The diff is not shown in this PR, but I got a 
[link](https://github.com/llvm/llvm-project/pull/81051/files#diff-da37bd91946b34b8d50ced64d8e9f79455b61e8d29b304d0ae9fe3148bc63333L579-L587)
 pointing to it. 

https://github.com/llvm/llvm-project/pull/81051
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