MIPS: Adapt Danno's Track Allocation Info idea to fast literals.

src/mips/code-stubs-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 325 matching lines @@
   // Need to collect. Call into runtime system.
   __ bind(&gc);
   __ TailCallRuntime(Runtime::kPushBlockContext, 2, 1);
 }
 
 
 static void GenerateFastCloneShallowArrayCommon(
     MacroAssembler* masm,
     int length,
     FastCloneShallowArrayStub::Mode mode,
+    AllocationSiteInfoMode allocation_site_info_mode,
     Label* fail) {
   // Registers on entry:
   // a3: boilerplate literal array.
   ASSERT(mode != FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS);
 
   // All sizes here are multiples of kPointerSize.
   int elements_size = 0;
   if (length > 0) {
     elements_size = mode == FastCloneShallowArrayStub::CLONE_DOUBLE_ELEMENTS
         ? FixedDoubleArray::SizeFor(length)
         : FixedArray::SizeFor(length);
   }
-  int size = JSArray::kSize + elements_size;
+  int size = JSArray::kSize;
+  int allocation_info_start = size;
+  if (allocation_site_info_mode == TRACK_ALLOCATION_SITE_INFO) {
+    size += AllocationSiteInfo::kSize;
+  }
+  size += elements_size;
 
   // Allocate both the JS array and the elements array in one big
   // allocation. This avoids multiple limit checks.
   __ AllocateInNewSpace(size,
                         v0,
                         a1,
                         a2,
                         fail,
                         TAG_OBJECT);
 
+  if (allocation_site_info_mode == TRACK_ALLOCATION_SITE_INFO) {
+    __ li(a2, Operand(Handle<Map>(masm->isolate()->heap()->
+                                   allocation_site_info_map())));
+    __ sw(a2, FieldMemOperand(v0, allocation_info_start));
+    __ sw(a3, FieldMemOperand(v0, allocation_info_start + kPointerSize));
+  }
+
   // Copy the JS array part.
   for (int i = 0; i < JSArray::kSize; i += kPointerSize) {
     if ((i != JSArray::kElementsOffset) || (length == 0)) {
       __ lw(a1, FieldMemOperand(a3, i));
       __ sw(a1, FieldMemOperand(v0, i));
     }
   }
 
   if (length > 0) {
     // Get hold of the elements array of the boilerplate and setup the
     // elements pointer in the resulting object.
     __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset));
-    __ Addu(a2, v0, Operand(JSArray::kSize));
+    if (allocation_site_info_mode == TRACK_ALLOCATION_SITE_INFO) {
+      __ Addu(a2, v0, Operand(JSArray::kSize + AllocationSiteInfo::kSize));
+    } else {
+      __ Addu(a2, v0, Operand(JSArray::kSize));
+    }
     __ sw(a2, FieldMemOperand(v0, JSArray::kElementsOffset));
 
     // Copy the elements array.
     ASSERT((elements_size % kPointerSize) == 0);
     __ CopyFields(a2, a3, a1.bit(), elements_size / kPointerSize);
   }
 }
 
 void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   //
   // [sp]: constant elements.
   // [sp + kPointerSize]: literal index.
   // [sp + (2 * kPointerSize)]: literals array.
 
   // Load boilerplate object into r3 and check if we need to create a
   // boilerplate.
   Label slow_case;
   __ lw(a3, MemOperand(sp, 2 * kPointerSize));
   __ lw(a0, MemOperand(sp, 1 * kPointerSize));
   __ Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ sll(t0, a0, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(t0, a3, t0);
   __ lw(a3, MemOperand(t0));
   __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
   __ Branch(&slow_case, eq, a3, Operand(t1));
 
   FastCloneShallowArrayStub::Mode mode = mode_;
+  AllocationSiteInfoMode allocation_site_info_mode =
+      DONT_TRACK_ALLOCATION_SITE_INFO;
+  if (mode == CLONE_ANY_ELEMENTS_WITH_ALLOCATION_SITE_INFO) {
+    mode = CLONE_ANY_ELEMENTS;
+    allocation_site_info_mode = TRACK_ALLOCATION_SITE_INFO;
+  }
   if (mode == CLONE_ANY_ELEMENTS) {
     Label double_elements, check_fast_elements;
     __ lw(v0, FieldMemOperand(a3, JSArray::kElementsOffset));
     __ lw(v0, FieldMemOperand(v0, HeapObject::kMapOffset));
     __ LoadRoot(t1, Heap::kFixedCOWArrayMapRootIndex);
     __ Branch(&check_fast_elements, ne, v0, Operand(t1));
     GenerateFastCloneShallowArrayCommon(masm, 0,
-                                        COPY_ON_WRITE_ELEMENTS, &slow_case);
+                                        COPY_ON_WRITE_ELEMENTS,
+                                        allocation_site_info_mode,
+                                        &slow_case);
     // Return and remove the on-stack parameters.
     __ DropAndRet(3);
 
     __ bind(&check_fast_elements);
     __ LoadRoot(t1, Heap::kFixedArrayMapRootIndex);
     __ Branch(&double_elements, ne, v0, Operand(t1));
     GenerateFastCloneShallowArrayCommon(masm, length_,
-                                        CLONE_ELEMENTS, &slow_case);
+                                        CLONE_ELEMENTS,
+                                        allocation_site_info_mode,
+                                        &slow_case);
     // Return and remove the on-stack parameters.
     __ DropAndRet(3);
 
     __ bind(&double_elements);
     mode = CLONE_DOUBLE_ELEMENTS;
     // Fall through to generate the code to handle double elements.
   }
 
   if (FLAG_debug_code) {
     const char* message;
@@ skipping 10 matching lines @@
       expected_map_index = Heap::kFixedCOWArrayMapRootIndex;
     }
     __ push(a3);
     __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset));
     __ lw(a3, FieldMemOperand(a3, HeapObject::kMapOffset));
     __ LoadRoot(at, expected_map_index);
     __ Assert(eq, message, a3, Operand(at));
     __ pop(a3);
   }
 
-  GenerateFastCloneShallowArrayCommon(masm, length_, mode, &slow_case);
+  GenerateFastCloneShallowArrayCommon(masm, length_, mode,
+                                      allocation_site_info_mode, &slow_case);
 
   // Return and remove the on-stack parameters.
   __ DropAndRet(3);
 
   __ bind(&slow_case);
   __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
 }
 
 
 void FastCloneShallowObjectStub::Generate(MacroAssembler* masm) {
@@ skipping 7374 matching lines @@
   __ Pop(ra, t1, a1);
   __ Ret();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS