[Turbofan] Implement super calls with spread bytecode in assembly code.

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 1182 matching lines @@
 
   __ bind(&stack_overflow);
   {
     __ TailCallRuntime(Runtime::kThrowStackOverflow);
     __ Unreachable();
   }
 }
 
 // static
 void Builtins::Generate_InterpreterPushArgsAndConstructImpl(
-    MacroAssembler* masm, CallableType construct_type) {
+    MacroAssembler* masm, PushArgsConstructMode mode) {
   // ----------- S t a t e -------------
   // -- x0 : argument count (not including receiver)
   // -- x3 : new target
   // -- x1 : constructor to call
   // -- x2 : allocation site feedback if available, undefined otherwise
   // -- x4 : address of the first argument
   // -----------------------------------
   Label stack_overflow;
 
   // Push a slot for the receiver.
   __ Push(xzr);
 
   // Push the arguments. x5, x4, x6, x7 will be modified.
   Generate_InterpreterPushArgs(masm, x0, x4, x5, x6, x7, &stack_overflow);
 
   __ AssertUndefinedOrAllocationSite(x2, x6);
-  if (construct_type == CallableType::kJSFunction) {
+  if (mode == PushArgsConstructMode::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 if (mode == PushArgsConstructMode::kWithFinalSpread) {
+    // Call the constructor with x0, x1, and x3 unmodified.
+    __ Jump(masm->isolate()->builtins()->ConstructWithSpread(),
+            RelocInfo::CODE_TARGET);
   } else {
-    DCHECK_EQ(construct_type, CallableType::kAny);
+    DCHECK_EQ(PushArgsConstructMode::kOther, mode);
     // Call the constructor with x0, x1, and x3 unmodified.
     __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
   }
 
   __ bind(&stack_overflow);
   {
     __ TailCallRuntime(Runtime::kThrowStackOverflow);
     __ Unreachable();
   }
 }
@@ skipping 1558 matching lines @@
   }
 
   // Called Construct on an Object that doesn't have a [[Construct]] internal
   // method.
   __ bind(&non_constructor);
   __ Jump(masm->isolate()->builtins()->ConstructedNonConstructable(),
           RelocInfo::CODE_TARGET);
 }
 
 // static
+void Builtins::Generate_ConstructWithSpread(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- x0 : the number of arguments (not including the receiver)
+  //  -- x1 : the constructor to call (can be any Object)
+  //  -- x3 : the new target (either the same as the constructor or
+  //          the JSFunction on which new was invoked initially)
+  // -----------------------------------
+
+  Register argc = x0;
+  Register constructor = x1;
+  Register new_target = x3;
+
+  Register scratch = x2;
+  Register scratch2 = x6;
+
+  Register spread = x4;
+  Register spread_map = x5;
+  __ Peek(spread, 0);
+  __ Ldr(spread_map, FieldMemOperand(spread, HeapObject::kMapOffset));
+
+  Label runtime_call, push_args;
+  // Check that the spread is an array.
+  __ CompareInstanceType(spread_map, scratch, JS_ARRAY_TYPE);
+  __ B(ne, &runtime_call);
+
+  // Check that we have the original ArrayPrototype.
+  __ Ldr(scratch, FieldMemOperand(spread_map, Map::kPrototypeOffset));
+  __ Ldr(scratch2, NativeContextMemOperand());
+  __ Ldr(scratch2,
+         ContextMemOperand(scratch2, Context::INITIAL_ARRAY_PROTOTYPE_INDEX));
+  __ Cmp(scratch, scratch2);
+  __ B(ne, &runtime_call);
+
+  // Check that the ArrayPrototype hasn't been modified in a way that would
+  // affect iteration.
+  __ LoadRoot(scratch, Heap::kArrayIteratorProtectorRootIndex);
+  __ Ldr(scratch, FieldMemOperand(scratch, Cell::kValueOffset));
+  __ Cmp(scratch, Smi::FromInt(Isolate::kProtectorValid));
+  __ B(ne, &runtime_call);
+
+  // Check that the map of the initial array iterator hasn't changed.
+  __ Ldr(scratch2, NativeContextMemOperand());
+  __ Ldr(scratch,
+         ContextMemOperand(scratch2,
+                           Context::INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX));
+  __ Ldr(scratch, FieldMemOperand(scratch, HeapObject::kMapOffset));
+  __ Ldr(scratch2,
+         ContextMemOperand(
+             scratch2, Context::INITIAL_ARRAY_ITERATOR_PROTOTYPE_MAP_INDEX));
+  __ Cmp(scratch, scratch2);
+  __ B(ne, &runtime_call);
+
+  // For FastPacked kinds, iteration will have the same effect as simply
+  // accessing each property in order.
+  Label no_protector_check;
+  __ Ldr(scratch, FieldMemOperand(spread_map, Map::kBitField2Offset));
+  __ DecodeField<Map::ElementsKindBits>(scratch);
+  __ Cmp(scratch, LAST_FAST_ELEMENTS_KIND);
+  __ B(hi, &runtime_call);
+  // For non-FastHoley kinds, we can skip the protector check.
+  __ Cmp(scratch, FAST_SMI_ELEMENTS);
+  __ B(eq, &no_protector_check);
+  __ Cmp(scratch, FAST_ELEMENTS);
+  __ B(eq, &no_protector_check);
+  __ Cmp(scratch, FAST_DOUBLE_ELEMENTS);
+  __ B(eq, &no_protector_check);
+  // Check the ArrayProtector cell.
+  __ LoadRoot(scratch, Heap::kArrayProtectorRootIndex);
+  __ Ldr(scratch, FieldMemOperand(scratch, PropertyCell::kValueOffset));
+  __ Cmp(scratch, Smi::FromInt(Isolate::kProtectorValid));
+  __ B(ne, &runtime_call);
+
+  __ Bind(&no_protector_check);
+  // Load the FixedArray backing store.
+  __ Ldr(spread, FieldMemOperand(spread, JSArray::kElementsOffset));
+  __ B(&push_args);
+
+  __ Bind(&runtime_call);
+  {
+    // Call the builtin for the result of the spread.
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ SmiTag(argc);
+    __ Push(constructor, new_target, argc, spread);
+    __ CallRuntime(Runtime::kSpreadIterableFixed);
+    __ Mov(spread, x0);
+    __ Pop(argc, new_target, constructor);
+    __ SmiUntag(argc);
+  }
+
+  Register spread_len = x5;
+  __ Bind(&push_args);
+  {
+    // Pop the spread argument off the stack.
+    __ Pop(scratch);
+    // Calculate the new nargs including the result of the spread.
+    __ Ldrsw(spread_len,
+             UntagSmiFieldMemOperand(spread, FixedArray::kLengthOffset));
+    // argc += spread_len - 1. Subtract 1 for the spread itself.
+    __ Add(argc, argc, spread_len);
+    __ Sub(argc, argc, 1);
+  }
+
+  // Check for stack overflow.
+  {
+    // Check the stack for overflow. We are not trying to catch interruptions
+    // (i.e. debug break and preemption) here, so check the "real stack limit".
+    Label done;
+    __ LoadRoot(scratch, Heap::kRealStackLimitRootIndex);
+    // Make scratch the space we have left. The stack might already be
+    // overflowed here which will cause scratch to become negative.
+    __ Sub(scratch, masm->StackPointer(), scratch);
+    // Check if the arguments will overflow the stack.
+    __ Cmp(scratch, Operand(spread_len, LSL, kPointerSizeLog2));
+    __ B(gt, &done);  // Signed comparison.
+    __ TailCallRuntime(Runtime::kThrowStackOverflow);
+    __ Bind(&done);
+  }
+
+  // Put the evaluated spread onto the stack as additional arguments.
+  {
+    __ Mov(scratch, 0);
+    Label done, loop;
+    __ Bind(&loop);
+    __ Cmp(scratch, spread_len);
+    __ B(eq, &done);
+    __ Add(scratch2, spread, Operand(scratch, LSL, kPointerSizeLog2));
+    __ Ldr(scratch2, FieldMemOperand(scratch2, FixedArray::kHeaderSize));
+    __ Push(scratch2);
+    __ Add(scratch, scratch, Operand(1));
+    __ B(&loop);
+    __ Bind(&done);
+  }
+
+  // Dispatch.
+  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+}
+
+// static
 void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
   ASM_LOCATION("Builtins::Generate_AllocateInNewSpace");
   // ----------- S t a t e -------------
   //  -- x1 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(x1);
   __ Push(x1);
   __ Move(cp, Smi::kZero);
   __ TailCallRuntime(Runtime::kAllocateInNewSpace);
@@ skipping 170 matching lines @@
     __ Unreachable();
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM