Correctify instanceof and make it optimizable.

src/arm64/macro-assembler-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/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 3569 matching lines @@
   Bind(&loop);
   JumpIfSmi(result, &done);
   CompareObjectType(result, temp, temp2, MAP_TYPE);
   B(ne, &done);
   Ldr(result, FieldMemOperand(result, Map::kConstructorOrBackPointerOffset));
   B(&loop);
   Bind(&done);
 }
 
 
-void MacroAssembler::TryGetFunctionPrototype(Register function,
-                                             Register result,
-                                             Register scratch,
-                                             Label* miss,
-                                             BoundFunctionAction action) {
+void MacroAssembler::TryGetFunctionPrototype(Register function, Register result,
+                                             Register scratch, Label* miss) {
   DCHECK(!AreAliased(function, result, scratch));
 
-  Label non_instance;
-  if (action == kMissOnBoundFunction) {
-    // Check that the receiver isn't a smi.
-    JumpIfSmi(function, miss);
-
-    // Check that the function really is a function. Load map into result reg.
-    JumpIfNotObjectType(function, result, scratch, JS_FUNCTION_TYPE, miss);
-
-    Register scratch_w = scratch.W();
-    Ldr(scratch,
-        FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
-    // On 64-bit platforms, compiler hints field is not a smi. See definition of
-    // kCompilerHintsOffset in src/objects.h.
-    Ldr(scratch_w,
-        FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset));
-    Tbnz(scratch, SharedFunctionInfo::kBoundFunction, miss);
-
-    // Make sure that the function has an instance prototype.
-    Ldrb(scratch, FieldMemOperand(result, Map::kBitFieldOffset));
-    Tbnz(scratch, Map::kHasNonInstancePrototype, &non_instance);
-  }
-
   // Get the prototype or initial map from the function.
   Ldr(result,
       FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
 
   // If the prototype or initial map is the hole, don't return it and simply
   // miss the cache instead. This will allow us to allocate a prototype object
   // on-demand in the runtime system.
   JumpIfRoot(result, Heap::kTheHoleValueRootIndex, miss);
 
   // If the function does not have an initial map, we're done.
   Label done;
   JumpIfNotObjectType(result, scratch, scratch, MAP_TYPE, &done);
 
   // Get the prototype from the initial map.
   Ldr(result, FieldMemOperand(result, Map::kPrototypeOffset));
 
-  if (action == kMissOnBoundFunction) {
-    B(&done);
-
-    // Non-instance prototype: fetch prototype from constructor field in initial
-    // map.
-    Bind(&non_instance);
-    GetMapConstructor(result, result, scratch, scratch);
-  }
-
   // All done.
   Bind(&done);
 }
 
 
 void MacroAssembler::CompareRoot(const Register& obj,
                                  Heap::RootListIndex index) {
   UseScratchRegisterScope temps(this);
   Register temp = temps.AcquireX();
   DCHECK(!AreAliased(obj, temp));
@@ skipping 780 matching lines @@
   Ldrb(scratch1, FieldMemOperand(current, Map::kBitField2Offset));
   DecodeField<Map::ElementsKindBits>(scratch1);
   CompareAndBranch(scratch1, DICTIONARY_ELEMENTS, eq, found);
   Ldr(current, FieldMemOperand(current, Map::kPrototypeOffset));
   CompareAndBranch(current, Heap::kNullValueRootIndex, ne, &loop_again);
 
   Bind(&end);
 }
 
 
-void MacroAssembler::GetRelocatedValueLocation(Register ldr_location,
-                                               Register result) {
-  DCHECK(!result.Is(ldr_location));
-  const uint32_t kLdrLitOffset_lsb = 5;
-  const uint32_t kLdrLitOffset_width = 19;
-  Ldr(result, MemOperand(ldr_location));
-  if (emit_debug_code()) {
-    And(result, result, LoadLiteralFMask);
-    Cmp(result, LoadLiteralFixed);
-    Check(eq, kTheInstructionToPatchShouldBeAnLdrLiteral);
-    // The instruction was clobbered. Reload it.
-    Ldr(result, MemOperand(ldr_location));
-  }
-  Sbfx(result, result, kLdrLitOffset_lsb, kLdrLitOffset_width);
-  Add(result, ldr_location, Operand(result, LSL, kWordSizeInBytesLog2));
-}
-
-
 void MacroAssembler::EnsureNotWhite(
     Register value,
     Register bitmap_scratch,
     Register shift_scratch,
     Register load_scratch,
     Register length_scratch,
     Label* value_is_white_and_not_data) {
   DCHECK(!AreAliased(
       value, bitmap_scratch, shift_scratch, load_scratch, length_scratch));
 
@@ skipping 683 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64