KeyedLoadIC should have same register spec as LoadIC.

src/arm64/stub-cache-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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/codegen.h"
 #include "src/ic-inl.h"
@@ skipping 1229 matching lines @@
 // TODO(all): The so-called scratch registers are significant in some cases. For
 // example, KeyedStoreStubCompiler::registers()[3] (x3) is actually used for
 // KeyedStoreCompiler::transition_map(). We should verify which registers are
 // actually scratch registers, and which are important. For now, we use the same
 // assignments as ARM to remain on the safe side.
 
 Register* LoadStubCompiler::registers() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
   Register receiver = LoadIC::ReceiverRegister();
   Register name = LoadIC::NameRegister();
-  static Register registers[] = { receiver, name, x3, x1, x4, x5 };
+  static Register registers[] = { receiver, name, x3, x0, x4, x5 };
   return registers;
 }
 
 
 Register* KeyedLoadStubCompiler::registers() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
-  Register receiver = KeyedLoadIC::ReceiverRegister();
-  Register name = KeyedLoadIC::NameRegister();
-  static Register registers[] = { receiver, name, x2, x3, x4, x5 };
+  Register receiver = LoadIC::ReceiverRegister();
+  Register name = LoadIC::NameRegister();
+  static Register registers[] = { receiver, name, x3, x0, x4, x5 };
   return registers;
 }
 
 
 Register StoreStubCompiler::value() {
   return x0;
 }
 
 
 Register* StoreStubCompiler::registers() {
@@ skipping 172 matching lines @@
   return GetICCode(
       kind(), Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm)
 
 void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
     MacroAssembler* masm) {
-  // ---------- S t a t e --------------
-  //  -- lr     : return address
-  //  -- x0     : key
-  //  -- x1     : receiver
-  // -----------------------------------
-  ASSERT(x1.is(KeyedLoadIC::ReceiverRegister()));
-  ASSERT(x0.is(KeyedLoadIC::NameRegister()));
+  // The return address is in lr.
   Label slow, miss;
 
   Register result = x0;
-  Register key = x0;
-  Register receiver = x1;
+  Register key = LoadIC::NameRegister();
+  Register receiver = LoadIC::ReceiverRegister();
+  ASSERT(receiver.is(x1));
+  ASSERT(key.is(x2));
 
   __ JumpIfNotSmi(key, &miss);
   __ Ldr(x4, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ LoadFromNumberDictionary(&slow, x4, key, result, x2, x3, x5, x6);
+  __ LoadFromNumberDictionary(&slow, x4, key, result, x7, x3, x5, x6);
   __ Ret();
 
   __ Bind(&slow);
   __ IncrementCounter(
-      masm->isolate()->counters()->keyed_load_external_array_slow(), 1, x2, x3);
+      masm->isolate()->counters()->keyed_load_external_array_slow(), 1, x4, x3);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Slow);
 
   // Miss case, call the runtime.
   __ Bind(&miss);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64