Revert of [runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/mips64/builtins-mips64.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_MIPS64
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1899 matching lines @@
   __ bind(&class_constructor);
   {
     FrameScope frame(masm, StackFrame::INTERNAL);
     __ Push(a1);
     __ CallRuntime(Runtime::kThrowConstructorNonCallableError, 1);
   }
 }
 
 
 // static
-void Builtins::Generate_CallBoundFunction(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  // -----------------------------------
-  __ AssertBoundFunction(a1);
-
-  // Patch the receiver to [[BoundThis]].
-  {
-    __ ld(at, FieldMemOperand(a1, JSBoundFunction::kBoundThisOffset));
-    __ dsll(a4, a0, kPointerSizeLog2);
-    __ daddu(a4, a4, sp);
-    __ sd(at, MemOperand(a4));
-  }
-
-  // Load [[BoundArguments]] into a2 and length of that into a4.
-  __ ld(a2, FieldMemOperand(a1, JSBoundFunction::kBoundArgumentsOffset));
-  __ ld(a4, FieldMemOperand(a2, FixedArray::kLengthOffset));
-  __ SmiUntag(a4);
-
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a2 : the [[BoundArguments]] (implemented as FixedArray)
-  //  -- a4 : the number of [[BoundArguments]]
-  // -----------------------------------
-
-  // Reserve stack space for the [[BoundArguments]].
-  {
-    Label done;
-    __ dsll(a5, a4, kPointerSizeLog2);
-    __ Dsubu(sp, sp, Operand(a5));
-    // 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".
-    __ LoadRoot(at, Heap::kRealStackLimitRootIndex);
-    __ Branch(&done, gt, sp, Operand(at));  // Signed comparison.
-    // Restore the stack pointer.
-    __ Daddu(sp, sp, Operand(a5));
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ EnterFrame(StackFrame::INTERNAL);
-      __ CallRuntime(Runtime::kThrowStackOverflow, 0);
-    }
-    __ bind(&done);
-  }
-
-  // Relocate arguments down the stack.
-  {
-    Label loop, done_loop;
-    __ mov(a5, zero_reg);
-    __ bind(&loop);
-    __ Branch(&done_loop, gt, a5, Operand(a0));
-    __ dsll(a6, a4, kPointerSizeLog2);
-    __ daddu(a6, a6, sp);
-    __ ld(at, MemOperand(a6));
-    __ dsll(a6, a5, kPointerSizeLog2);
-    __ daddu(a6, a6, sp);
-    __ sd(at, MemOperand(a6));
-    __ Daddu(a4, a4, Operand(1));
-    __ Daddu(a5, a5, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Copy [[BoundArguments]] to the stack (below the arguments).
-  {
-    Label loop, done_loop;
-    __ ld(a4, FieldMemOperand(a2, FixedArray::kLengthOffset));
-    __ SmiUntag(a4);
-    __ Daddu(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-    __ bind(&loop);
-    __ Dsubu(a4, a4, Operand(1));
-    __ Branch(&done_loop, lt, a4, Operand(zero_reg));
-    __ dsll(a5, a4, kPointerSizeLog2);
-    __ daddu(a5, a5, a2);
-    __ ld(at, MemOperand(a5));
-    __ dsll(a5, a0, kPointerSizeLog2);
-    __ daddu(a5, a5, sp);
-    __ sd(at, MemOperand(a5));
-    __ Daddu(a0, a0, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Call the [[BoundTargetFunction]] via the Call builtin.
-  __ ld(a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-  __ li(at, Operand(ExternalReference(Builtins::kCall_ReceiverIsAny,
-                                      masm->isolate())));
-  __ ld(at, MemOperand(at));
-  __ Daddu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-// static
 void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode) {
   // ----------- S t a t e -------------
   //  -- a0 : the number of arguments (not including the receiver)
   //  -- a1 : the target to call (can be any Object).
   // -----------------------------------
 
   Label non_callable, non_function, non_smi;
   __ JumpIfSmi(a1, &non_callable);
   __ bind(&non_smi);
   __ GetObjectType(a1, t1, t2);
   __ Jump(masm->isolate()->builtins()->CallFunction(mode),
           RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
-  __ Jump(masm->isolate()->builtins()->CallBoundFunction(),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_BOUND_FUNCTION_TYPE));
   __ Branch(&non_function, ne, t2, Operand(JS_PROXY_TYPE));
 
   // 1. Runtime fallback for Proxy [[Call]].
   __ Push(a1);
   // Increase the arguments size to include the pushed function and the
   // existing receiver on the stack.
   __ Daddu(a0, a0, 2);
   // Tail-call to the runtime.
   __ JumpToExternalReference(
       ExternalReference(Runtime::kJSProxyCall, masm->isolate()));
@@ skipping 40 matching lines @@
   // Tail call to the function-specific construct stub (still in the caller
   // context at this point).
   __ ld(a4, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   __ ld(a4, FieldMemOperand(a4, SharedFunctionInfo::kConstructStubOffset));
   __ Daddu(at, a4, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Jump(at);
 }
 
 
 // static
-void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a3 : the new target (checked to be a constructor)
-  // -----------------------------------
-  __ AssertBoundFunction(a1);
-
-  // Load [[BoundArguments]] into a2 and length of that into a4.
-  __ ld(a2, FieldMemOperand(a1, JSBoundFunction::kBoundArgumentsOffset));
-  __ ld(a4, FieldMemOperand(a2, FixedArray::kLengthOffset));
-  __ SmiUntag(a4);
-
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a2 : the [[BoundArguments]] (implemented as FixedArray)
-  //  -- a3 : the new target (checked to be a constructor)
-  //  -- a4 : the number of [[BoundArguments]]
-  // -----------------------------------
-
-  // Reserve stack space for the [[BoundArguments]].
-  {
-    Label done;
-    __ dsll(a5, a4, kPointerSizeLog2);
-    __ Dsubu(sp, sp, Operand(a5));
-    // 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".
-    __ LoadRoot(at, Heap::kRealStackLimitRootIndex);
-    __ Branch(&done, gt, sp, Operand(at));  // Signed comparison.
-    // Restore the stack pointer.
-    __ Daddu(sp, sp, Operand(a5));
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ EnterFrame(StackFrame::INTERNAL);
-      __ CallRuntime(Runtime::kThrowStackOverflow, 0);
-    }
-    __ bind(&done);
-  }
-
-  // Relocate arguments down the stack.
-  {
-    Label loop, done_loop;
-    __ mov(a5, zero_reg);
-    __ bind(&loop);
-    __ Branch(&done_loop, ge, a5, Operand(a0));
-    __ dsll(a6, a4, kPointerSizeLog2);
-    __ daddu(a6, a6, sp);
-    __ ld(at, MemOperand(a6));
-    __ dsll(a6, a5, kPointerSizeLog2);
-    __ daddu(a6, a6, sp);
-    __ sd(at, MemOperand(a6));
-    __ Daddu(a4, a4, Operand(1));
-    __ Daddu(a5, a5, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Copy [[BoundArguments]] to the stack (below the arguments).
-  {
-    Label loop, done_loop;
-    __ ld(a4, FieldMemOperand(a2, FixedArray::kLengthOffset));
-    __ SmiUntag(a4);
-    __ Daddu(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-    __ bind(&loop);
-    __ Dsubu(a4, a4, Operand(1));
-    __ Branch(&done_loop, lt, a4, Operand(zero_reg));
-    __ dsll(a5, a4, kPointerSizeLog2);
-    __ daddu(a5, a5, a2);
-    __ ld(at, MemOperand(a5));
-    __ dsll(a5, a0, kPointerSizeLog2);
-    __ daddu(a5, a5, sp);
-    __ sd(at, MemOperand(a5));
-    __ Daddu(a0, a0, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Patch new.target to [[BoundTargetFunction]] if new.target equals target.
-  {
-    Label skip_load;
-    __ Branch(&skip_load, ne, a1, Operand(a3));
-    __ ld(a3, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-    __ bind(&skip_load);
-  }
-
-  // Construct the [[BoundTargetFunction]] via the Construct builtin.
-  __ ld(a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-  __ li(at, Operand(ExternalReference(Builtins::kConstruct, masm->isolate())));
-  __ ld(at, MemOperand(at));
-  __ Addu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-// static
 void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a0 : the number of arguments (not including the receiver)
   //  -- a1 : the constructor to call (checked to be a JSProxy)
   //  -- a3 : the new target (either the same as the constructor or
   //          the JSFunction on which new was invoked initially)
   // -----------------------------------
 
   // Call into the Runtime for Proxy [[Construct]].
   __ Push(a1, a3);
@@ skipping 22 matching lines @@
   __ ld(t1, FieldMemOperand(a1, HeapObject::kMapOffset));
   __ lbu(t2, FieldMemOperand(t1, Map::kInstanceTypeOffset));
   __ Jump(masm->isolate()->builtins()->ConstructFunction(),
           RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
 
   // Check if target has a [[Construct]] internal method.
   __ lbu(t3, FieldMemOperand(t1, Map::kBitFieldOffset));
   __ And(t3, t3, Operand(1 << Map::kIsCallable));
   __ Branch(&non_constructor, eq, t3, Operand(zero_reg));
 
-  // Only dispatch to bound functions after checking whether they are
-  // constructors.
-  __ Jump(masm->isolate()->builtins()->ConstructBoundFunction(),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_BOUND_FUNCTION_TYPE));
-
   // Only dispatch to proxies after checking whether they are constructors.
   __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
           eq, t2, Operand(JS_PROXY_TYPE));
 
   // Called Construct on an exotic Object with a [[Construct]] internal method.
   {
     // Overwrite the original receiver with the (original) target.
     __ dsll(at, a0, kPointerSizeLog2);
     __ daddu(at, sp, at);
     __ sd(a1, MemOperand(at));
@@ skipping 165 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64