X87: [proxies] throw TypeError if is_callable Map bit is unset.

src/x87/builtins-x87.cc

Index: src/x87/builtins-x87.cc
diff --git a/src/x87/builtins-x87.cc b/src/x87/builtins-x87.cc
index 317166b294c433a5187f7e5251fb56aa6f2812ff..a42ce01ae25c534a30f6441922d0548892e02eff 100644
--- a/src/x87/builtins-x87.cc
+++ b/src/x87/builtins-x87.cc
@@ -2228,6 +2228,11 @@ void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode,
   __ CmpInstanceType(ecx, JS_BOUND_FUNCTION_TYPE);
   __ j(equal, masm->isolate()->builtins()->CallBoundFunction(tail_call_mode),
        RelocInfo::CODE_TARGET);
+
+  // Check if target has a [[Call]] internal method.
+  __ test_b(FieldOperand(ecx, Map::kBitFieldOffset), 1 << Map::kIsCallable);
+  __ j(zero, &non_callable);
+
   __ CmpInstanceType(ecx, JS_PROXY_TYPE);
   __ j(not_equal, &non_function);
 
@@ -2250,9 +2255,6 @@ 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.
-  __ test_b(FieldOperand(ecx, Map::kBitFieldOffset), 1 << Map::kIsCallable);
-  __ j(zero, &non_callable, Label::kNear);
   // Overwrite the original receiver with the (original) target.
   __ mov(Operand(esp, eax, times_pointer_size, kPointerSize), edi);
   // Let the "call_as_function_delegate" take care of the rest.