Use a register spec for StoreIC and KeyedStoreIC.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 34a23e11f16a1d91aaff0731d641771a1d24ec16..13dd7b70742bc728f1c195a1d52921394884f8bf 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -4191,11 +4191,10 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
 
 void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(cp));
-  ASSERT(ToRegister(instr->object()).is(r1));
-  ASSERT(ToRegister(instr->value()).is(r0));
+  ASSERT(ToRegister(instr->object()).is(StoreIC::ReceiverRegister()));
+  ASSERT(ToRegister(instr->value()).is(StoreIC::ValueRegister()));
 
-  // Name is always in r2.
-  __ mov(r2, Operand(instr->name()));
+  __ mov(StoreIC::NameRegister(), Operand(instr->name()));
   Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->strict_mode());
   CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
 }
@@ -4413,9 +4412,9 @@ void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(cp));
-  ASSERT(ToRegister(instr->object()).is(r2));
-  ASSERT(ToRegister(instr->key()).is(r1));
-  ASSERT(ToRegister(instr->value()).is(r0));
+  ASSERT(ToRegister(instr->object()).is(KeyedStoreIC::ReceiverRegister()));
+  ASSERT(ToRegister(instr->key()).is(KeyedStoreIC::NameRegister()));
+  ASSERT(ToRegister(instr->value()).is(KeyedStoreIC::ValueRegister()));
 
   Handle<Code> ic = instr->strict_mode() == STRICT
       ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()