Use IC register definitions in platform files.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index f1b23d671c60465fca1581cba36cd5019ca6ed68..662bdd8ab4819b44b22faf16002e48a50d2e4b7b 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -3399,9 +3399,9 @@ void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
 
 void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(cp));
-  ASSERT(ToRegister(instr->global_object()).Is(x0));
+  ASSERT(ToRegister(instr->global_object()).is(LoadIC::ReceiverRegister()));
   ASSERT(ToRegister(instr->result()).Is(x0));
-  __ Mov(x2, Operand(instr->name()));
+  __ Mov(LoadIC::NameRegister(), Operand(instr->name()));
   ContextualMode mode = instr->for_typeof() ? NOT_CONTEXTUAL : CONTEXTUAL;
   Handle<Code> ic = LoadIC::initialize_stub(isolate(), mode);
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
@@ -3653,8 +3653,8 @@ void LCodeGen::DoLoadKeyedFixed(LLoadKeyedFixed* instr) {
 
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(cp));
-  ASSERT(ToRegister(instr->object()).Is(x1));
-  ASSERT(ToRegister(instr->key()).Is(x0));
+  ASSERT(ToRegister(instr->object()).is(KeyedLoadIC::ReceiverRegister()));
+  ASSERT(ToRegister(instr->key()).is(KeyedLoadIC::NameRegister()));
 
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
@@ -3704,9 +3704,10 @@ void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
 
 void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(cp));
-  // LoadIC expects x2 to hold the name, and x0 to hold the receiver.
+  // LoadIC expects name and receiver in registers.
+  ASSERT(ToRegister(instr->object()).is(LoadIC::ReceiverRegister()));
   ASSERT(ToRegister(instr->object()).is(x0));
-  __ Mov(x2, Operand(instr->name()));
+  __ Mov(LoadIC::NameRegister(), Operand(instr->name()));
 
   Handle<Code> ic = LoadIC::initialize_stub(isolate(), NOT_CONTEXTUAL);
   CallCode(ic, RelocInfo::CODE_TARGET, instr);