[interpreter] Switch passing of new.target to register.

src/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 786 matching lines @@
 }
 
 
 // Generate code for entering a JS function with the interpreter.
 // On entry to the function the receiver and arguments have been pushed on the
 // stack left to right.  The actual argument count matches the formal parameter
 // count expected by the function.
 //
 // The live registers are:
 //   - x1: the JS function object being called.
+//   - x3: the new target
 //   - cp: our context.
 //   - fp: our caller's frame pointer.
 //   - jssp: stack pointer.
 //   - lr: return address.
 //
 // The function builds a JS frame.  Please see JavaScriptFrameConstants in
 // frames-arm64.h for its layout.
 // TODO(rmcilroy): We will need to include the current bytecode pointer in the
 // frame.
 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // MANUAL indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done below).
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ Push(lr, fp, cp, x1);
   __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp);
+  __ Push(x3);

[Michael Starzinger, 2015/11/24 12:40:41]

Not sure whether this is the best way to construct the frame on RISC
architectures. Happy to change if you think another sequence is better.

 
   // Get the bytecode array from the function object and load the pointer to the
   // first entry into kInterpreterBytecodeRegister.
   __ Ldr(x0, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
   __ Ldr(kInterpreterBytecodeArrayRegister,
          FieldMemOperand(x0, SharedFunctionInfo::kFunctionDataOffset));
 
   if (FLAG_debug_code) {
     // Check function data field is actually a BytecodeArray object.
     __ AssertNotSmi(kInterpreterBytecodeArrayRegister,
@@ skipping 45 matching lines @@
     __ Push(kInterpreterBytecodeArrayRegister);
     __ CallRuntime(Runtime::kStackGuard, 0);
     __ Pop(kInterpreterBytecodeArrayRegister);
     __ Bind(&ok);
   }
 
   // Load accumulator, register file, bytecode offset, dispatch table into
   // registers.
   __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex);
   __ Sub(kInterpreterRegisterFileRegister, fp,
-         Operand(kPointerSize + StandardFrameConstants::kFixedFrameSizeFromFp));
+         Operand(2 * kPointerSize +
+                 StandardFrameConstants::kFixedFrameSizeFromFp));
   __ Mov(kInterpreterBytecodeOffsetRegister,
          Operand(BytecodeArray::kHeaderSize - kHeapObjectTag));
   __ LoadRoot(kInterpreterDispatchTableRegister,
               Heap::kInterpreterTableRootIndex);
   __ Add(kInterpreterDispatchTableRegister, kInterpreterDispatchTableRegister,
          Operand(FixedArray::kHeaderSize - kHeapObjectTag));
 
   // Dispatch to the first bytecode handler for the function.
   __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister));
@@ skipping 1035 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM