Correctify instanceof and make it optimizable.

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 586df33c4dfd9ef7e1b94ab692a0492f2e6d5f1f..a74021f96bbcfcbe97cdb180bc26bd813ae4c884 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -3587,35 +3587,10 @@ void MacroAssembler::GetMapConstructor(Register result, Register map,
 }
 
 
-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));
@@ -3632,15 +3607,6 @@ void MacroAssembler::TryGetFunctionPrototype(Register function,
   // 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);
 }
@@ -4441,24 +4407,6 @@ void MacroAssembler::JumpIfDictionaryInPrototypeChain(
 }
 
 
-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,