In-heap small typed arrays

src/flag-definitions.h

 // 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 337 matching lines @@
 DEFINE_bool(block_concurrent_recompilation, false,
             "block queued jobs until released")
 DEFINE_bool(concurrent_osr, false,
             "concurrent on-stack replacement")
 DEFINE_implication(concurrent_osr, concurrent_recompilation)
 
 DEFINE_bool(omit_map_checks_for_leaf_maps, true,
             "do not emit check maps for constant values that have a leaf map, "
             "deoptimize the optimized code if the layout of the maps changes.")
 
+DEFINE_int(typed_array_in_heap_threshold, 64,
+    "threshold for in-heap typed array")

[mvstanton, 2014/03/03 10:37:49]

how about typed_array_max_size_in_heap. 

Also, could you relate this constant to the max object size in the heap with
ASSERTS somewhere appropriate? Obviously, 64 bytes is very small compared to max
object size in new space, but an assert would offer long-lasting protection.

[Dmitry Lomov (no reviews), 2014/03/10 09:20:35]

Done.

+
 // Profiler flags.
 DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler")
            // 0x1800 fits in the immediate field of an ARM instruction.
 DEFINE_int(interrupt_budget, 0x1800,
            "execution budget before interrupt is triggered")
 DEFINE_int(type_info_threshold, 25,
            "percentage of ICs that must have type info to allow optimization")
 DEFINE_int(self_opt_count, 130, "call count before self-optimization")
 
 DEFINE_bool(trace_opt_verbose, false, "extra verbose compilation tracing")
@@ skipping 549 matching lines @@
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 
 #undef COMMA