Revert of [runtime] Fix ES6 9.2.1 [[Call]] when encountering a classConstructor.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 2521 matching lines @@
 
   __ bind(&not_array_function);
 
   CreateWeakCellStub weak_cell_stub(masm->isolate());
   CallStubInRecordCallTarget(masm, &weak_cell_stub, is_super);
   __ bind(&done);
 }
 
 
 static void EmitContinueIfStrictOrNative(MacroAssembler* masm, Label* cont) {
-  // ----------- S t a t e -------------
-  // -- a1 : the function to call
-  // -- a3 : the shared function info
-  // -----------------------------------
+  __ ld(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
+
   // Do not transform the receiver for strict mode functions.
   int32_t strict_mode_function_mask =
       1 << SharedFunctionInfo::kStrictModeBitWithinByte;
   // Do not transform the receiver for native (Compilerhints already in a3).
   int32_t native_mask = 1 << SharedFunctionInfo::kNativeBitWithinByte;
 
   __ lbu(a4, FieldMemOperand(a3, SharedFunctionInfo::kStrictModeByteOffset));
   __ And(at, a4, Operand(strict_mode_function_mask));
   __ Branch(cont, ne, at, Operand(zero_reg));
   __ lbu(a4, FieldMemOperand(a3, SharedFunctionInfo::kNativeByteOffset));
@@ skipping 15 matching lines @@
     __ mov(a0, a3);
     ToObjectStub stub(masm->isolate());
     __ CallStub(&stub);
     __ pop(a1);
   }
   __ Branch(USE_DELAY_SLOT, cont);
   __ sd(v0, MemOperand(sp, argc * kPointerSize));
 }
 
 
-static void EmitClassConstructorCallCheck(MacroAssembler* masm) {
-  //   ----------- S t a t e -------------
-  //   -- a1 : the function to call
-  //   -- a3 : the shared function info
-  //   -----------------------------------
-  //   ClassConstructor Check: ES6 section 9.2.1 [[Call]]
-  Label non_class_constructor;
-  __ lbu(a4, FieldMemOperand(a3, SharedFunctionInfo::kFunctionKindByteOffset));
-  __ And(at, a4, Operand(SharedFunctionInfo::kClassConstructorBitsWithinByte));
-  __ Branch(&non_class_constructor, eq, at, Operand(zero_reg));
-  // If we call a classConstructor Function throw a TypeError
-  // indirectly via the CallFunction builtin.
-  __ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET);
-  __ bind(&non_class_constructor);
-}
-
-
 static void CallFunctionNoFeedback(MacroAssembler* masm,
                                    int argc, bool needs_checks,
                                    bool call_as_method) {
   // a1 : the function to call
   Label slow, wrap, cont;
 
   if (needs_checks) {
     // Check that the function is really a JavaScript function.
     // a1: pushed function (to be verified)
     __ JumpIfSmi(a1, &slow);
 
     // Goto slow case if we do not have a function.
     __ GetObjectType(a1, a4, a4);
     __ Branch(&slow, ne, a4, Operand(JS_FUNCTION_TYPE));
   }
 
-  __ ld(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  EmitClassConstructorCallCheck(masm);
-
   // Fast-case: Invoke the function now.
   // a1: pushed function
   ParameterCount actual(argc);
 
   if (call_as_method) {
     if (needs_checks) {
       EmitContinueIfStrictOrNative(masm, &cont);
     }
 
     // Compute the receiver in sloppy mode.
@@ skipping 186 matching lines @@
   __ JumpIfSmi(a1, &extra_checks_or_miss);
 
   // Increment the call count for monomorphic function calls.
   __ dsrl(t0, a3, 32 - kPointerSizeLog2);
   __ Daddu(a3, a2, Operand(t0));
   __ ld(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
   __ Daddu(t0, t0, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
   __ sd(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
 
   __ bind(&have_js_function);
-
-  __ ld(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  EmitClassConstructorCallCheck(masm);
-
   if (CallAsMethod()) {
     EmitContinueIfStrictOrNative(masm, &cont);
     // Compute the receiver in sloppy mode.
     __ ld(a3, MemOperand(sp, argc * kPointerSize));
 
     __ JumpIfSmi(a3, &wrap);
     __ GetObjectType(a3, a4, a4);
     __ Branch(&wrap, lt, a4, Operand(FIRST_SPEC_OBJECT_TYPE));
 
     __ bind(&cont);
@@ skipping 2981 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64