[llvm] [CodeGen][X86] Fix lowering of tailcalls when `-ms-hotpatch` is used (PR #77245)

[Shengchen Kan via llvm-commits]

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@@ -994,8 +995,11 @@ void X86AsmPrinter::LowerPATCHABLE_OP(const MachineInstr &MI,
       (void)NopSize;
     }
   }
-  if (!EmptyInst)
+  if (!EmptyInst) {
+    if (Opcode != convertTailJumpOpcode(Opcode))
+      OutStreamer->AddComment("TAILCALL");
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KanRobert wrote:

This line is not tested at all?

https://github.com/llvm/llvm-project/pull/77245