[Interpreter] Collect allocation site feedback in call bytecode handler.

src/builtins/x64/builtins-x64.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_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 772 matching lines @@
 }
 
 static void Generate_InterpreterPushArgs(MacroAssembler* masm,
                                          Register num_args,
                                          Register start_address,
                                          Register scratch, bool push_receiver) {
   // ----------- S t a t e -------------
   //  -- rax : the number of arguments (not including the receiver)
   //  -- rbx : the address of the first argument to be pushed. Subsequent
   //           arguments should be consecutive above this, in the same order as
   //           they are to be pushed onto the stack.

[rmcilroy, 2016/09/06 10:59:35]

This isn't really applicable here (since we don't use the register names
directly)

[mythria, 2016/09/07 08:59:45]

Done.

   // -----------------------------------
 
   // Find the address of the last argument.
   __ movp(scratch, num_args);
   if (push_receiver) {

[rmcilroy, 2016/09/06 10:59:35]

Ditto (if possible)

[mythria, 2016/09/07 08:59:45]

Done.

     __ addp(scratch, Immediate(1));  // Add one for receiver.
   }
 
   __ shlp(scratch, Immediate(kPointerSizeLog2));
   __ negp(scratch);
   __ addp(scratch, start_address);
 
   // Push the arguments.
   Label loop_header, loop_check;
   __ j(always, &loop_check);
@@ skipping 14 matching lines @@
   //  -- rbx : the address of the first argument to be pushed. Subsequent
   //           arguments should be consecutive above this, in the same order as
   //           they are to be pushed onto the stack.
   //  -- rdi : the target to call (can be any Object).
   // -----------------------------------
 
   // Pop return address to allow tail-call after pushing arguments.
   __ PopReturnAddressTo(kScratchRegister);
 
   // TODO(mythria): Add a stack check before pushing arguments.
-  // rax is readonly rcx and r8 will be modified.
+  // rax is readonly rbx and rcx will be modified.
   Generate_InterpreterPushArgs(masm, rax, rbx, rcx, true);
 
   // Call the target.
   __ PushReturnAddressFrom(kScratchRegister);  // Re-push return address.
 
   if (function_type == CallableType::kJSFunction) {
     __ Jump(masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny,
                                                       tail_call_mode),
             RelocInfo::CODE_TARGET);
   } else {
@@ skipping 42 matching lines @@
     __ leap(rcx, FieldOperand(rcx, Code::kHeaderSize));
     // Jump to the constructor function (rax, rbx, rdx passed on).
     __ jmp(rcx);
   } else {
     DCHECK_EQ(construct_type, CallableType::kAny);
     // Call the constructor (rax, rdx, rdi passed on).
     __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
   }
 }
 
+// static
+void Builtins::Generate_InterpreterPushArgsAndConstructArray(
+    MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rax : the number of arguments (not including the receiver)
+  //  -- rdx : the target to call checked to be Array function.
+  //  -- rbx : the allocation site feedback
+  //  -- rcx : the address of the first argument to be pushed. Subsequent
+  //           arguments should be consecutive above this, in the same order as
+  //           they are to be pushed onto the stack.
+  // -----------------------------------
+
+  // Pop return address to allow tail-call after pushing arguments.
+  __ PopReturnAddressTo(kScratchRegister);
+
+  // TODO(mythria): Add a stack check before pushing arguments.
+  // rax is readonly rcx and r8 will be modified.
+  Generate_InterpreterPushArgs(masm, rax, rcx, r8, true);
+
+  // Push return address in preparation for the tail-call.
+  __ PushReturnAddressFrom(kScratchRegister);
+
+  // Array constructor expects constructor in rdi. It is same as rdx here.
+  __ Move(rdi, rdx);
+
+  ArrayConstructorStub stub(masm->isolate());
+  __ TailCallStub(&stub);
+}
+
 void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) {
   // Set the return address to the correct point in the interpreter entry
   // trampoline.
   Smi* interpreter_entry_return_pc_offset(
       masm->isolate()->heap()->interpreter_entry_return_pc_offset());
   DCHECK_NE(interpreter_entry_return_pc_offset, Smi::FromInt(0));
   __ Move(rbx, masm->isolate()->builtins()->InterpreterEntryTrampoline());
   __ addp(rbx, Immediate(interpreter_entry_return_pc_offset->value() +
                          Code::kHeaderSize - kHeapObjectTag));
   __ Push(rbx);
@@ skipping 2204 matching lines @@
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64