[clang] Enable direct methods and fast alloc calls for libobjc2. (PR #78030)

[Saleem Abdulrasool via cfe-commits]

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@@ -2649,13 +2767,18 @@ CGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF,
     }
   }
 
+  bool isDirect = Method && Method->isDirectMethod();
+
   IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy));
   llvm::Value *cmd;
-  if (Method)
-    cmd = GetSelector(CGF, Method);
-  else
-    cmd = GetSelector(CGF, Sel);
-  cmd = EnforceType(Builder, cmd, SelectorTy);
+  if (!isDirect) {
+    if (Method)
+      cmd = GetSelector(CGF, Method);
+    else
+      cmd = GetSelector(CGF, Sel);
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compnerd wrote:

Probably more compact as a ternary.

https://github.com/llvm/llvm-project/pull/78030