[proxies] throw TypeError in [[Call]] if is_callable Map bit is unset

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index c0a0421a5eb08f2fc773c0da84be2782ffb5c47a..6c4419e08426860fcb4fb8aaecfa2c9a679b8610 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -2409,6 +2409,12 @@ void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode,
   __ CmpInstanceType(rcx, JS_BOUND_FUNCTION_TYPE);
   __ j(equal, masm->isolate()->builtins()->CallBoundFunction(tail_call_mode),
        RelocInfo::CODE_TARGET);
+
+  // Check if target has a [[Call]] internal method.
+  __ testb(FieldOperand(rcx, Map::kBitFieldOffset),
+           Immediate(1 << Map::kIsCallable));
+  __ j(zero, &non_callable);
+
   __ CmpInstanceType(rcx, JS_PROXY_TYPE);
   __ j(not_equal, &non_function);
 
@@ -2431,10 +2437,6 @@ void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode,
   // 2. Call to something else, which might have a [[Call]] internal method (if
   // not we raise an exception).
   __ bind(&non_function);
-  // Check if target has a [[Call]] internal method.
-  __ testb(FieldOperand(rcx, Map::kBitFieldOffset),
-           Immediate(1 << Map::kIsCallable));
-  __ j(zero, &non_callable, Label::kNear);
   // Overwrite the original receiver with the (original) target.
   __ movp(args.GetReceiverOperand(), rdi);
   // Let the "call_as_function_delegate" take care of the rest.