MIPS: Additional work to get array literal allocation tracking working, even with --always-opt

src/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1712 matching lines @@
 
   __ mov(a0, result_register());
   __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
   __ lw(a3, FieldMemOperand(a3, JSFunction::kLiteralsOffset));
   __ li(a2, Operand(Smi::FromInt(expr->literal_index())));
   __ li(a1, Operand(constant_elements));
   __ Push(a3, a2, a1);
   if (has_fast_elements && constant_elements_values->map() ==
       isolate()->heap()->fixed_cow_array_map()) {
     FastCloneShallowArrayStub stub(
-        FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS, length);
+        FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS,
+        DONT_TRACK_ALLOCATION_SITE,
+        length);
     __ CallStub(&stub);
     __ IncrementCounter(isolate()->counters()->cow_arrays_created_stub(),
         1, a1, a2);
   } else if (expr->depth() > 1) {
     __ CallRuntime(Runtime::kCreateArrayLiteral, 3);
   } else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) {
     __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
   } else {
     ASSERT(IsFastSmiOrObjectElementsKind(constant_elements_kind) ||
            FLAG_smi_only_arrays);
-    FastCloneShallowArrayStub::Mode mode = has_fast_elements
-      ? FastCloneShallowArrayStub::CLONE_ELEMENTS
-      : FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
+    FastCloneShallowArrayStub::Mode mode =
+        FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
+    AllocationSiteMode allocation_site_mode = FLAG_track_allocation_sites
+        ? TRACK_ALLOCATION_SITE : DONT_TRACK_ALLOCATION_SITE;
 
-    // Tracking allocation info allows us to pre-transition later if it makes
-    // sense.
-    if (mode == FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS &&
-        FLAG_track_allocation_sites) {
-      mode = FastCloneShallowArrayStub::
-          CLONE_ANY_ELEMENTS_WITH_ALLOCATION_SITE_INFO;
+    if (has_fast_elements) {
+      mode = FastCloneShallowArrayStub::CLONE_ELEMENTS;
+      allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
     }
 
-    FastCloneShallowArrayStub stub(mode, length);
+    FastCloneShallowArrayStub stub(mode, allocation_site_mode, length);
     __ CallStub(&stub);
   }
 
   bool result_saved = false;  // Is the result saved to the stack?
 
   // Emit code to evaluate all the non-constant subexpressions and to store
   // them into the newly cloned array.
   for (int i = 0; i < length; i++) {
     Expression* subexpr = subexprs->at(i);
     // If the subexpression is a literal or a simple materialized literal it
@@ skipping 2818 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS