Reland Vector ICs: platform support for vector-based stores.

src/ic/x64/stub-cache-x64.cc

 // Copyright 2012 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_X64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/stub-cache.h"
 #include "src/interface-descriptors.h"
@@ skipping 92 matching lines @@
   // Check scratch register is valid, extra and extra2 are unused.
   DCHECK(!scratch.is(no_reg));
   DCHECK(extra2.is(no_reg));
   DCHECK(extra3.is(no_reg));
 
 #ifdef DEBUG
   // If vector-based ics are in use, ensure that scratch doesn't conflict with
   // the vector and slot registers, which need to be preserved for a handler
   // call or miss.
   if (IC::ICUseVector(ic_kind)) {
-    Register vector = LoadWithVectorDescriptor::VectorRegister();
-    Register slot = LoadDescriptor::SlotRegister();
-    DCHECK(!AreAliased(vector, slot, scratch));
+    if (ic_kind == Code::LOAD_IC || ic_kind == Code::KEYED_LOAD_IC) {
+      Register vector = LoadWithVectorDescriptor::VectorRegister();
+      Register slot = LoadDescriptor::SlotRegister();
+      DCHECK(!AreAliased(vector, slot, scratch));
+    } else {
+      DCHECK(ic_kind == Code::STORE_IC || ic_kind == Code::KEYED_STORE_IC);
+      Register vector = VectorStoreICDescriptor::VectorRegister();
+      Register slot = VectorStoreICDescriptor::SlotRegister();
+      DCHECK(!AreAliased(vector, slot, scratch));
+    }
   }
 #endif
 
   Counters* counters = masm->isolate()->counters();
   __ IncrementCounter(counters->megamorphic_stub_cache_probes(), 1);
 
   // Check that the receiver isn't a smi.
   __ JumpIfSmi(receiver, &miss);
 
   // Get the map of the receiver and compute the hash.
@@ skipping 26 matching lines @@
   __ bind(&miss);
   __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64