Supporting AllocationSiteInfo for Nested arrays

src/arm/code-stubs-arm.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 478 matching lines @@
 
   GenerateFastCloneShallowArrayCommon(masm, length_, mode,
                                       allocation_site_mode_,
                                       &slow_case);
 
   // Return and remove the on-stack parameters.
   __ add(sp, sp, Operand(3 * kPointerSize));
   __ Ret();
 
   __ bind(&slow_case);
-  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
+
+  // Add a flags argument, carefully preserving the return address on the stack.

[danno, 2013/02/11 15:05:21]

The comment is a bit misleading for ARM, since the return address is in "lr", so
there is no care needed :-)

[mvstanton, 2013/02/15 07:36:43]

Done.

+  int flags = allocation_site_mode_ == TRACK_ALLOCATION_SITE
+      ? ArrayLiteral::kAllocationSiteInfoAllowed
+      : ArrayLiteral::kNoFlags;
+  __ mov(r0, Operand(Smi::FromInt(flags)));
+  __ push(r0);
+  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 4, 1);
 }
 
 
 void FastCloneShallowObjectStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   //
   // [sp]: object literal flags.
   // [sp + kPointerSize]: constant properties.
   // [sp + (2 * kPointerSize)]: literal index.
   // [sp + (3 * kPointerSize)]: literals array.
@@ skipping 7436 matching lines @@
 
   __ Pop(lr, r5, r1);
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM