X87: [Turbofan] Implement super calls with spread bytecode in assembly code.

src/builtins/x87/builtins-x87.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_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2807 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 -------------
+  //  -- eax : the number of arguments (not including the receiver)
+  //  -- edx : the new target (either the same as the constructor or
+  //           the JSFunction on which new was invoked initially)
+  //  -- edi : the constructor to call (can be any Object)
+  // -----------------------------------
+
+  // Free up some registers.
+  // Save edx/edi to stX0/stX1.
+  __ push(edx);
+  __ push(edi);
+  __ fld_s(MemOperand(esp, 0));
+  __ fld_s(MemOperand(esp, 4));
+  __ lea(esp, Operand(esp, 2 * kFloatSize));
+
+  Register argc = eax;
+
+  Register scratch = ecx;
+  Register scratch2 = edi;
+
+  Register spread = ebx;
+  Register spread_map = edx;
+
+  __ mov(spread, Operand(esp, kPointerSize));
+  __ mov(spread_map, FieldOperand(spread, HeapObject::kMapOffset));
+
+  Label runtime_call, push_args;
+  // Check that the spread is an array.
+  __ CmpInstanceType(spread_map, JS_ARRAY_TYPE);
+  __ j(not_equal, &runtime_call);
+
+  // Check that we have the original ArrayPrototype.
+  __ mov(scratch, FieldOperand(spread_map, Map::kPrototypeOffset));
+  __ mov(scratch2, NativeContextOperand());
+  __ cmp(scratch,
+         ContextOperand(scratch2, Context::INITIAL_ARRAY_PROTOTYPE_INDEX));
+  __ j(not_equal, &runtime_call);
+
+  // Check that the ArrayPrototype hasn't been modified in a way that would
+  // affect iteration.
+  __ LoadRoot(scratch, Heap::kArrayIteratorProtectorRootIndex);
+  __ cmp(FieldOperand(scratch, Cell::kValueOffset),
+         Immediate(Smi::FromInt(Isolate::kProtectorValid)));
+  __ j(not_equal, &runtime_call);
+
+  // Check that the map of the initial array iterator hasn't changed.
+  __ mov(scratch2, NativeContextOperand());
+  __ mov(scratch,
+         ContextOperand(scratch2,
+                        Context::INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX));
+  __ mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset));
+  __ cmp(scratch,
+         ContextOperand(scratch2,
+                        Context::INITIAL_ARRAY_ITERATOR_PROTOTYPE_MAP_INDEX));
+  __ j(not_equal, &runtime_call);
+
+  // For FastPacked kinds, iteration will have the same effect as simply
+  // accessing each property in order.
+  Label no_protector_check;
+  __ mov(scratch, FieldOperand(spread_map, Map::kBitField2Offset));
+  __ DecodeField<Map::ElementsKindBits>(scratch);
+  __ cmp(scratch, Immediate(LAST_FAST_ELEMENTS_KIND));
+  __ j(above, &runtime_call);
+  // For non-FastHoley kinds, we can skip the protector check.
+  __ cmp(scratch, Immediate(FAST_SMI_ELEMENTS));
+  __ j(equal, &no_protector_check);
+  __ cmp(scratch, Immediate(FAST_ELEMENTS));
+  __ j(equal, &no_protector_check);
+  __ cmp(scratch, Immediate(FAST_DOUBLE_ELEMENTS));
+  __ j(equal, &no_protector_check);
+  // Check the ArrayProtector cell.
+  __ LoadRoot(scratch, Heap::kArrayProtectorRootIndex);
+  __ cmp(FieldOperand(scratch, PropertyCell::kValueOffset),
+         Immediate(Smi::FromInt(Isolate::kProtectorValid)));
+  __ j(not_equal, &runtime_call);
+
+  __ bind(&no_protector_check);
+  // Load the FixedArray backing store.
+  __ mov(spread, FieldOperand(spread, JSArray::kElementsOffset));
+  // Free up some registers.
+  __ jmp(&push_args);
+
+  __ bind(&runtime_call);
+  {
+    // Call the builtin for the result of the spread.
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    // Need to save these on the stack.
+    // Restore edx/edi from stX0/stX1.
+    __ lea(esp, Operand(esp, -2 * kFloatSize));
+    __ fstp_s(MemOperand(esp, 0));
+    __ fstp_s(MemOperand(esp, 4));
+    __ pop(edx);
+    __ pop(edi);
+
+    __ Push(edi);
+    __ Push(edx);
+    __ SmiTag(argc);
+    __ Push(argc);
+    __ Push(spread);
+    __ CallRuntime(Runtime::kSpreadIterableFixed);
+    __ mov(spread, eax);
+    __ Pop(argc);
+    __ SmiUntag(argc);
+    __ Pop(edx);
+    __ Pop(edi);
+    // Free up some registers.
+    // Save edx/edi to stX0/stX1.
+    __ push(edx);
+    __ push(edi);
+    __ fld_s(MemOperand(esp, 0));
+    __ fld_s(MemOperand(esp, 4));
+    __ lea(esp, Operand(esp, 2 * kFloatSize));
+  }
+
+  Register spread_len = edx;
+  Register return_address = edi;
+  __ bind(&push_args);
+  {
+    // Pop the return address and spread argument.
+    __ PopReturnAddressTo(return_address);
+    __ Pop(scratch);
+
+    // Calculate the new nargs including the result of the spread.
+    __ mov(spread_len, FieldOperand(spread, FixedArray::kLengthOffset));
+    __ SmiUntag(spread_len);
+    // argc += spread_len - 1. Subtract 1 for the spread itself.
+    __ lea(argc, Operand(argc, spread_len, times_1, -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.
+    __ neg(scratch);
+    __ add(scratch, esp);
+    __ sar(scratch, kPointerSizeLog2);
+    // Check if the arguments will overflow the stack.
+    __ cmp(scratch, spread_len);
+    __ j(greater, &done, Label::kNear);  // Signed comparison.
+    __ TailCallRuntime(Runtime::kThrowStackOverflow);
+    __ bind(&done);
+  }
+
+  // Put the evaluated spread onto the stack as additional arguments.
+  {
+    Register scratch2 = esi;
+    //    __ movd(xmm2, esi);
+    // Save esi to stX0, edx/edi in stX1/stX2 now.
+    __ push(esi);
+    __ fld_s(MemOperand(esp, 0));
+    __ lea(esp, Operand(esp, 1 * kFloatSize));
+
+    __ mov(scratch, Immediate(0));
+    Label done, loop;
+    __ bind(&loop);
+    __ cmp(scratch, spread_len);
+    __ j(equal, &done, Label::kNear);
+    __ mov(scratch2, FieldOperand(spread, scratch, times_pointer_size,
+                                  FixedArray::kHeaderSize));
+    __ Push(scratch2);
+    __ inc(scratch);
+    __ jmp(&loop);
+    __ bind(&done);
+    __ PushReturnAddressFrom(return_address);
+
+    // Now Restore esi from stX0, edx/edi from stX1/stX2.
+    __ lea(esp, Operand(esp, -3 * kFloatSize));
+    __ fstp_s(MemOperand(esp, 0));
+    __ fstp_s(MemOperand(esp, 4));
+    __ fstp_s(MemOperand(esp, 8));
+    __ pop(esi);
+    __ pop(edx);
+    __ pop(edi);
+  }
+
+  // Dispatch.
+  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+}
+
+// static
 void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- edx    : requested object size (untagged)
   //  -- esp[0] : return address
   // -----------------------------------
   __ SmiTag(edx);
   __ PopReturnAddressTo(ecx);
   __ Push(edx);
   __ PushReturnAddressFrom(ecx);
   __ Move(esi, Smi::kZero);
@@ skipping 301 matching lines @@
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87