Fix StoreIndexedInstr input representation requirements for Int32/Uint32 arrays.

runtime/vm/assembler_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 3414 matching lines @@
   LoadClassById(result, TMP);
 }
 
 
 void Assembler::CompareClassId(Register object, intptr_t class_id) {
   LoadClassId(TMP, object);
   cmpl(TMP, Immediate(class_id));
 }
 
 
+void Assembler::SmiUntagOrCheckClass(Register object,
+                                     intptr_t class_id,
+                                     Label* is_smi) {
+  ASSERT(kSmiTagShift == 1);
+  ASSERT(RawObject::kClassIdTagPos == 16);
+  ASSERT(RawObject::kClassIdTagSize == 16);
+  const intptr_t class_id_offset = Object::tags_offset() +
+      RawObject::kClassIdTagPos / kBitsPerByte;
+
+  // Untag optimistically. Tag bit is shifted into the CARRY.
+  SmiUntag(object);
+  j(NOT_CARRY, is_smi, kNearJump);
+  // Load cid: can't use LoadClassId, object is untagged. Use TIMES_2 scale
+  // factor in the addressing mode to compensate for this.
+  movzxw(TMP, Address(object, TIMES_2, class_id_offset));
+  cmpl(TMP, Immediate(class_id));
+}
+
+
 void Assembler::LoadTaggedClassIdMayBeSmi(Register result, Register object) {
   ASSERT(result != object);
 
   // Load up a null object. We only need it so we can use LoadClassId on it in
   // the case that object is a Smi.
   LoadObject(result, Object::null_object(), PP);
   // Check if the object is a Smi.
   testq(object, Immediate(kSmiTagMask));
   // If the object *is* a Smi, use the null object instead.
   cmoveq(object, result);
@@ skipping 78 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64