[Interpreter] Collect type feedback for 'new' in the bytecode handler

src/builtins/arm64/builtins-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 1168 matching lines @@
   //          arguments should be consecutive above this, in the same order as
   //          they are to be pushed onto the stack.
   //  -- x1 : the target to call (can be any Object).
   // -----------------------------------
 
   // Find the address of the last argument.
   __ add(x3, x0, Operand(1));  // Add one for receiver.
   __ lsl(x3, x3, kPointerSizeLog2);
   __ sub(x4, x2, x3);
 
+  // TODO(mythria): Add a stack check before pushing arguments.
   // Push the arguments.
   Label loop_header, loop_check;
   __ Mov(x5, jssp);
   __ Claim(x3, 1);
   __ B(&loop_check);
   __ Bind(&loop_header);
   // TODO(rmcilroy): Push two at a time once we ensure we keep stack aligned.
   __ Ldr(x3, MemOperand(x2, -kPointerSize, PostIndex));
   __ Str(x3, MemOperand(x5, -kPointerSize, PreIndex));
   __ Bind(&loop_check);
   __ Cmp(x2, x4);
   __ B(gt, &loop_header);
 
   // Call the target.
   if (function_type == CallableType::kJSFunction) {
     __ Jump(masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny,
                                                       tail_call_mode),
             RelocInfo::CODE_TARGET);
   } else {
     DCHECK_EQ(function_type, CallableType::kAny);
     __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny,
                                               tail_call_mode),
             RelocInfo::CODE_TARGET);
   }
 }
 
 // static
-void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
+void Builtins::Generate_InterpreterPushArgsAndConstructImpl(
+    MacroAssembler* masm, CallableType construct_type) {
   // ----------- S t a t e -------------
   // -- x0 : argument count (not including receiver)
   // -- x3 : new target
   // -- x1 : constructor to call
-  // -- x2 : address of the first argument
+  // -- x2 : allocation site feedback if available, undefined otherwise
+  // -- x4 : address of the first argument
   // -----------------------------------
 
   // Find the address of the last argument.
   __ add(x5, x0, Operand(1));  // Add one for receiver (to be constructed).
   __ lsl(x5, x5, kPointerSizeLog2);
 
   // Set stack pointer and where to stop.
   __ Mov(x6, jssp);
   __ Claim(x5, 1);
-  __ sub(x4, x6, x5);
+  __ sub(x7, x6, x5);
 
   // Push a slot for the receiver.
   __ Str(xzr, MemOperand(x6, -kPointerSize, PreIndex));
 
   Label loop_header, loop_check;
+  // TODO(mythria): Add a stack check before pushing arguments.
   // Push the arguments.
   __ B(&loop_check);
   __ Bind(&loop_header);
   // TODO(rmcilroy): Push two at a time once we ensure we keep stack aligned.
-  __ Ldr(x5, MemOperand(x2, -kPointerSize, PostIndex));
+  __ Ldr(x5, MemOperand(x4, -kPointerSize, PostIndex));
   __ Str(x5, MemOperand(x6, -kPointerSize, PreIndex));
   __ Bind(&loop_check);
-  __ Cmp(x6, x4);
+  __ Cmp(x6, x7);
   __ B(gt, &loop_header);
 
-  // Call the constructor with x0, x1, and x3 unmodified.
-  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+  __ AssertUndefinedOrAllocationSite(x2, x6);
+  if (construct_type == CallableType::kJSFunction) {
+    __ AssertFunction(x1);
+
+    // Tail call to the function-specific construct stub (still in the caller
+    // context at this point).
+    __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
+    __ Ldr(x4, FieldMemOperand(x4, SharedFunctionInfo::kConstructStubOffset));
+    __ Add(x4, x4, Code::kHeaderSize - kHeapObjectTag);
+    __ Br(x4);
+  } else {
+    DCHECK_EQ(construct_type, CallableType::kAny);
+    // Call the constructor with x0, x1, and x3 unmodified.
+    __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+  }
 }
 
 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));
   __ LoadObject(x1, masm->isolate()->builtins()->InterpreterEntryTrampoline());
   __ Add(lr, x1, Operand(interpreter_entry_return_pc_offset->value() +
@@ skipping 1774 matching lines @@
     __ Unreachable();
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM