Reverting r4685, r4686, r4687

src/flag-definitions.h

 // Copyright 2008 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 131 matching lines @@
 DEFINE_bool(debug_info, true, "add debug information to compiled functions")
 
 // compiler.cc
 DEFINE_bool(strict, false, "strict error checking")
 DEFINE_int(min_preparse_length, 1024,
            "minimum length for automatic enable preparsing")
 DEFINE_bool(full_compiler, true, "enable dedicated backend for run-once code")
 DEFINE_bool(fast_compiler, false, "enable speculative optimizing backend")
 DEFINE_bool(always_full_compiler, false,
             "try to use the dedicated run-once backend for all code")
-#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X64)
+#ifdef V8_TARGET_ARCH_IA32
 DEFINE_bool(force_full_compiler, false,
             "force use of the dedicated run-once backend for all code")
 #endif
 DEFINE_bool(always_fast_compiler, false,
             "try to use the speculative optimizing backend for all code")
 DEFINE_bool(trace_bailout, false,
             "print reasons for falling back to using the classic V8 backend")
 DEFINE_bool(safe_int32_compiler, true,
             "enable optimized side-effect-free int32 expressions.")
 DEFINE_bool(use_flow_graph, false, "perform flow-graph based optimizations")
@@ skipping 167 matching lines @@
 DEFINE_bool(trace_contexts, false, "trace contexts operations")
 
 // heap.cc
 DEFINE_bool(gc_greedy, false, "perform GC prior to some allocations")
 DEFINE_bool(gc_verbose, false, "print stuff during garbage collection")
 DEFINE_bool(heap_stats, false, "report heap statistics before and after GC")
 DEFINE_bool(code_stats, false, "report code statistics after GC")
 DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
 DEFINE_bool(print_handles, false, "report handles after GC")
 DEFINE_bool(print_global_handles, false, "report global handles after GC")
+DEFINE_bool(print_rset, false, "print remembered sets before GC")
 
 // ic.cc
 DEFINE_bool(trace_ic, false, "trace inline cache state transitions")
 
 // objects.cc
 DEFINE_bool(trace_normalization,
             false,
             "prints when objects are turned into dictionaries.")
 
 // runtime.cc
@@ skipping 96 matching lines @@
 #undef FLAG
 
 #undef DEFINE_bool
 #undef DEFINE_int
 #undef DEFINE_string
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META