Revert of Vector ICs: platform support for vector-based stores.

src/ic/arm64/ic-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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 678 matching lines @@
   __ bind(&maybe_name_key);
   __ Ldr(x10, FieldMemOperand(key, HeapObject::kMapOffset));
   __ Ldrb(x10, FieldMemOperand(x10, Map::kInstanceTypeOffset));
   __ JumpIfNotUniqueNameInstanceType(x10, &slow);
 
   if (FLAG_vector_stores) {
     // The handlers in the stub cache expect a vector and slot. Since we won't
     // change the IC from any downstream misses, a dummy vector can be used.
     Register vector = VectorStoreICDescriptor::VectorRegister();
     Register slot = VectorStoreICDescriptor::SlotRegister();
-    DCHECK(!AreAliased(vector, slot, x5, x6, x7, x8));
+    DCHECK(!AreAliased(vector, slot, x3, x4, x5, x6));
     Handle<TypeFeedbackVector> dummy_vector =
         TypeFeedbackVector::DummyVector(masm->isolate());
     int slot_index = dummy_vector->GetIndex(
         FeedbackVectorICSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
     __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
     __ Mov(slot, Operand(Smi::FromInt(slot_index)));
   }
 
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags,
-                                               receiver, key, x5, x6, x7, x8);
+                                               receiver, key, x3, x4, x5, x6);
   // Cache miss.
   __ B(&miss);
 
   __ Bind(&extra);
   // Extra capacity case: Check if there is extra capacity to
   // perform the store and update the length. Used for adding one
   // element to the array by writing to array[array.length].
 
   // Check for room in the elements backing store.
   // Both the key and the length of FixedArray are smis.
@@ skipping 60 matching lines @@
   int args = FLAG_vector_stores ? 5 : 3;
   __ TailCallRuntime(Runtime::kStoreIC_Miss, args, 1);
 }
 
 
 void StoreIC::GenerateNormal(MacroAssembler* masm) {
   Label miss;
   Register value = StoreDescriptor::ValueRegister();
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
-  Register vector = VectorStoreICDescriptor::VectorRegister();
-  Register slot = VectorStoreICDescriptor::SlotRegister();
-  Register dictionary = x5;
-  DCHECK(!AreAliased(value, receiver, name, slot, vector, x5, x6, x7));
+  Register dictionary = x3;
+  DCHECK(!AreAliased(value, receiver, name, x3, x4, x5));
 
   __ Ldr(dictionary, FieldMemOperand(receiver, JSObject::kPropertiesOffset));
 
-  GenerateDictionaryStore(masm, &miss, dictionary, name, value, x6, x7);
+  GenerateDictionaryStore(masm, &miss, dictionary, name, value, x4, x5);
   Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->store_normal_hit(), 1, x6, x7);
+  __ IncrementCounter(counters->store_normal_hit(), 1, x4, x5);
   __ Ret();
 
   // Cache miss: Jump to runtime.
   __ Bind(&miss);
-  __ IncrementCounter(counters->store_normal_miss(), 1, x6, x7);
+  __ IncrementCounter(counters->store_normal_miss(), 1, x4, x5);
   GenerateMiss(masm);
 }
 
 
 Condition CompareIC::ComputeCondition(Token::Value op) {
   switch (op) {
     case Token::EQ_STRICT:
     case Token::EQ:
       return eq;
     case Token::LT:
@@ skipping 73 matching lines @@
   } else {
     DCHECK(to_patch->Mask(TestBranchMask) == TBNZ);
     // This is JumpIfSmi(smi_reg, branch_imm).
     patcher.tbz(smi_reg, 0, branch_imm);
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64