new classes: implement new.target passing to superclass constructor.

src/ia32/code-stubs-ia32.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 720 matching lines @@
   StubRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, call_helper);
 
   __ bind(&miss);
   PropertyAccessCompiler::TailCallBuiltin(
       masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
 }
 
 
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
+  CHECK(!has_new_target());
   // The key is in edx and the parameter count is in eax.
   DCHECK(edx.is(ArgumentsAccessReadDescriptor::index()));
   DCHECK(eax.is(ArgumentsAccessReadDescriptor::parameter_count()));
 
   // The displacement is used for skipping the frame pointer on the
   // stack. It is the offset of the last parameter (if any) relative
   // to the frame pointer.
   static const int kDisplacement = 1 * kPointerSize;
 
   // Check that the key is a smi.
@@ skipping 46 matching lines @@
   __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1);
 }
 
 
 void ArgumentsAccessStub::GenerateNewSloppySlow(MacroAssembler* masm) {
   // esp[0] : return address
   // esp[4] : number of parameters
   // esp[8] : receiver displacement
   // esp[12] : function
 
+  CHECK(!has_new_target());
+
   // Check if the calling frame is an arguments adaptor frame.
   Label runtime;
   __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
   __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &runtime, Label::kNear);
 
   // Patch the arguments.length and the parameters pointer.
   __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
   __ mov(Operand(esp, 1 * kPointerSize), ecx);
   __ lea(edx, Operand(edx, ecx, times_2,
               StandardFrameConstants::kCallerSPOffset));
   __ mov(Operand(esp, 2 * kPointerSize), edx);
 
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kNewSloppyArguments, 3, 1);
 }
 
 
 void ArgumentsAccessStub::GenerateNewSloppyFast(MacroAssembler* masm) {
   // esp[0] : return address
   // esp[4] : number of parameters (tagged)
   // esp[8] : receiver displacement
   // esp[12] : function
 
   // ebx = parameter count (tagged)
   __ mov(ebx, Operand(esp, 1 * kPointerSize));
 
+  CHECK(!has_new_target());
+
   // Check if the calling frame is an arguments adaptor frame.
   // TODO(rossberg): Factor out some of the bits that are shared with the other
   // Generate* functions.
   Label runtime;
   Label adaptor_frame, try_allocate;
   __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
   __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor_frame, Label::kNear);
 
@@ skipping 219 matching lines @@
   __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor_frame, Label::kNear);
 
   // Get the length from the frame.
   __ mov(ecx, Operand(esp, 1 * kPointerSize));
   __ jmp(&try_allocate, Label::kNear);
 
   // Patch the arguments.length and the parameters pointer.
   __ bind(&adaptor_frame);
   __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ mov(Operand(esp, 1 * kPointerSize), ecx);
+
+  if (has_new_target()) {
+    // Subtract 1 from smi-tagged arguments count.
+    __ sub(ecx, Immediate(2));
+  }
+
   __ lea(edx, Operand(edx, ecx, times_2,
                       StandardFrameConstants::kCallerSPOffset));
+  __ mov(Operand(esp, 1 * kPointerSize), ecx);
   __ mov(Operand(esp, 2 * kPointerSize), edx);
 
   // Try the new space allocation. Start out with computing the size of
   // the arguments object and the elements array.
   Label add_arguments_object;
   __ bind(&try_allocate);
   __ test(ecx, ecx);
   __ j(zero, &add_arguments_object, Label::kNear);
   __ lea(ecx, Operand(ecx, times_2, FixedArray::kHeaderSize));
   __ bind(&add_arguments_object);
@@ skipping 1055 matching lines @@
           isolate()->factory()->allocation_site_map();
       __ cmp(FieldOperand(ebx, 0), Immediate(allocation_site_map));
       __ j(equal, &feedback_register_initialized);
       __ mov(ebx, isolate()->factory()->undefined_value());
       __ bind(&feedback_register_initialized);
     }
 
     __ AssertUndefinedOrAllocationSite(ebx);
   }
 
-  // Pass original constructor to construct stub.
-  __ mov(edx, edi);
+  if (IsSuperConstructorCall()) {
+    __ mov(edx, Operand(esp, eax, times_pointer_size, 2 * kPointerSize));
+  } else {
+    // Pass original constructor to construct stub.
+    __ mov(edx, edi);
+  }
 
   // Jump to the function-specific construct stub.
   Register jmp_reg = ecx;
   __ mov(jmp_reg, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
   __ mov(jmp_reg, FieldOperand(jmp_reg,
                                SharedFunctionInfo::kConstructStubOffset));
   __ lea(jmp_reg, FieldOperand(jmp_reg, Code::kHeaderSize));
   __ jmp(jmp_reg);
 
   // edi: called object
@@ skipping 2934 matching lines @@
                            ApiParameterOperand(2), kStackSpace, nullptr,
                            Operand(ebp, 7 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32