Remove redundant symbol lookups in IRExecutionUnit::FindInSymbols

When we search for a symbol, we first check if it is in the module_sp of the current SymbolContext, and if not, we check in the target's modules. However, the target's ModuleList also includes the already checked module, which leads to a redundant search in it.

Author: DmT021

lldb/source/Expression/IRExecutionUnit.cpp

@@ -785,6 +785,10 @@ IRExecutionUnit::FindInSymbols(const std::vector<ConstString> &names,
     return LLDB_INVALID_ADDRESS;
   }
 
+  ModuleList images = target->GetImages();
+  // We'll process module_sp separately, before the other modules.
+  images.Remove(sc.module_sp);
+
   LoadAddressResolver resolver(target, symbol_was_missing_weak);
 
   ModuleFunctionSearchOptions function_options;
@@ -799,20 +803,21 @@ IRExecutionUnit::FindInSymbols(const std::vector<ConstString> &names,
                                   sc_list);
       if (auto load_addr = resolver.Resolve(sc_list))
         return *load_addr;
-    }
 
-    if (sc.target_sp) {
-      SymbolContextList sc_list;
-      sc.target_sp->GetImages().FindFunctions(name, lldb::eFunctionNameTypeFull,
-                                              function_options, sc_list);
+      sc.module_sp->FindSymbolsWithNameAndType(name, lldb::eSymbolTypeAny,
+                                               sc_list);
       if (auto load_addr = resolver.Resolve(sc_list))
         return *load_addr;
     }
 
-    if (sc.target_sp) {
+    {
       SymbolContextList sc_list;
-      sc.target_sp->GetImages().FindSymbolsWithNameAndType(
-          name, lldb::eSymbolTypeAny, sc_list);
+      images.FindFunctions(name, lldb::eFunctionNameTypeFull, function_options,
+                           sc_list);
+      if (auto load_addr = resolver.Resolve(sc_list))
+        return *load_addr;
+
+      images.FindSymbolsWithNameAndType(name, lldb::eSymbolTypeAny, sc_list);
       if (auto load_addr = resolver.Resolve(sc_list))
         return *load_addr;
     }