PPC: Fix compilation failure in debug mode after removal of Register::is method

Fix 0b491c89

R=bjaideep@ca.ibm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I7d05371844ddb0b5a165a61bc901346f85fcb631
Reviewed-on: https://chromium-review.googlesource.com/665477Reviewed-by: Jaideep Bajwa <bjaideep@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#48000}

src/ic/ppc/handler-compiler-ppc.cc

@@ -45,9 +45,9 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
     __ Push(cp, value());
 
     if (accessor_index >= 0) {
-      DCHECK(!holder.is(scratch));
-      DCHECK(!receiver.is(scratch));
-      DCHECK(!value().is(scratch));
+      DCHECK(holder != scratch);
+      DCHECK(receiver != scratch);
+      DCHECK(value() != scratch);
       // Call the JavaScript setter with receiver and value on the stack.
       if (map->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
@@ -104,7 +104,7 @@ void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup(
     MacroAssembler* masm, Label* miss_label, Register receiver,
     Handle<Name> name, Register scratch0, Register scratch1) {
   DCHECK(name->IsUniqueName());
-  DCHECK(!receiver.is(scratch0));
+  DCHECK(receiver != scratch0);
   Counters* counters = masm->isolate()->counters();
   __ IncrementCounter(counters->negative_lookups(), 1, scratch0, scratch1);
   __ IncrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1);
@@ -172,14 +172,14 @@ void PropertyHandlerCompiler::GenerateApiAccessorCall(
     Handle<Map> receiver_map, Register receiver, Register scratch_in,
     bool is_store, Register store_parameter, Register accessor_holder,
     int accessor_index) {
-  DCHECK(!accessor_holder.is(scratch_in));
-  DCHECK(!receiver.is(scratch_in));
+  DCHECK(accessor_holder != scratch_in);
+  DCHECK(receiver != scratch_in);
   __ push(accessor_holder);
   __ push(receiver);
   // Write the arguments to stack frame.
   if (is_store) {
-    DCHECK(!receiver.is(store_parameter));
-    DCHECK(!scratch_in.is(store_parameter));
+    DCHECK(receiver != store_parameter);
+    DCHECK(scratch_in != store_parameter);
     __ push(store_parameter);
   }
   DCHECK(optimization.is_simple_api_call());
@@ -285,9 +285,9 @@ Register PropertyHandlerCompiler::CheckPrototypes(
   Handle<Map> receiver_map = map();
 
   // Make sure there's no overlap between holder and object registers.
-  DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg));
-  DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) &&
-         !scratch2.is(scratch1));
+  DCHECK(scratch1 != object_reg && scratch1 != holder_reg);
+  DCHECK(scratch2 != object_reg && scratch2 != holder_reg &&
+         scratch2 != scratch1);
 
   Handle<Cell> validity_cell =
       Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());