[regexp][liveedit] Fix inconsistent JSArrays

src/x64/code-stubs-x64.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_X64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 675 matching lines @@
   // Load RegExp data.
   __ bind(&success);
   __ movp(rax, args.GetArgumentOperand(JS_REG_EXP_OBJECT_ARGUMENT_INDEX));
   __ movp(rcx, FieldOperand(rax, JSRegExp::kDataOffset));
   __ SmiToInteger32(rax,
                     FieldOperand(rcx, JSRegExp::kIrregexpCaptureCountOffset));
   // Calculate number of capture registers (number_of_captures + 1) * 2.
   __ leal(rdx, Operand(rax, rax, times_1, 2));
 
   // rdx: Number of capture registers
-  // Check that the fourth object is a JSArray object.
+  // Check that the fourth object is a JSObject.
   __ movp(r15, args.GetArgumentOperand(LAST_MATCH_INFO_ARGUMENT_INDEX));
   __ JumpIfSmi(r15, &runtime);
-  __ CmpObjectType(r15, JS_ARRAY_TYPE, kScratchRegister);
+  __ CmpObjectType(r15, JS_OBJECT_TYPE, kScratchRegister);
   __ j(not_equal, &runtime);
-  // Check that the JSArray is in fast case.
+  // Check that the object has fast elements.
   __ movp(rbx, FieldOperand(r15, JSArray::kElementsOffset));
   __ movp(rax, FieldOperand(rbx, HeapObject::kMapOffset));
   __ CompareRoot(rax, Heap::kFixedArrayMapRootIndex);
   __ j(not_equal, &runtime);
   // Check that the last match info has space for the capture registers and the
   // additional information. Ensure no overflow in add.
   STATIC_ASSERT(FixedArray::kMaxLength < kMaxInt - FixedArray::kLengthOffset);
   __ SmiToInteger32(rax, FieldOperand(rbx, FixedArray::kLengthOffset));
   __ subl(rax, Immediate(RegExpImpl::kLastMatchOverhead));
   __ cmpl(rdx, rax);
@@ skipping 4492 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64