Merge changes up to V8 version 2.1.3 into the partial snapshots

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 134 matching lines @@
 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")
 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, false,
+            "enable optimized side-effect-free int32 expressions.")
+DEFINE_bool(use_flow_graph, false, "perform flow-graph based optimizations")
 
 // compilation-cache.cc
 DEFINE_bool(compilation_cache, true, "enable compilation cache")
 
 // debug.cc
 DEFINE_bool(remote_debugging, false, "enable remote debugging")
 DEFINE_bool(trace_debug_json, false, "trace debugging JSON request/response")
 DEFINE_bool(debugger_auto_break, true,
             "automatically set the debug break flag when debugger commands are "
             "in the queue")
+DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature")
 
 // frames.cc
 DEFINE_int(max_stack_trace_source_length, 300,
            "maximum length of function source code printed in a stack trace.")
 
 // heap.cc
 DEFINE_int(max_new_space_size, 0, "max size of the new generation")
 DEFINE_int(max_old_space_size, 0, "max size of the old generation")
 DEFINE_bool(gc_global, false, "always perform global GCs")
 DEFINE_int(gc_interval, -1, "garbage collect after <n> allocations")
@@ skipping 47 matching lines @@
 // simulator-arm.cc and simulator-mips.cc
 DEFINE_bool(trace_sim, false, "trace simulator execution")
 DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions")
 
 // top.cc
 DEFINE_bool(trace_exception, false,
             "print stack trace when throwing exceptions")
 DEFINE_bool(preallocate_message_memory, false,
             "preallocate some memory to build stack traces.")
 
-// usage-analyzer.cc
-DEFINE_bool(usage_computation, true, "compute variable usage counts")
-
 // v8.cc
 DEFINE_bool(preemption, false,
             "activate a 100ms timer that switches between V8 threads")
 
 // Regexp
 DEFINE_bool(trace_regexps, false, "trace regexp execution")
 DEFINE_bool(regexp_optimization, true, "generate optimized regexp code")
 DEFINE_bool(regexp_entry_native, true, "use native code to enter regexp")
 
 // Testing flags test/cctest/test-{flags,api,serialization}.cc
@@ skipping 51 matching lines @@
 DEFINE_bool(print_builtin_json_ast, false,
             "print source AST for builtins as JSON")
 DEFINE_bool(trace_calls, false, "trace calls")
 DEFINE_bool(trace_builtin_calls, false, "trace builtins calls")
 DEFINE_string(stop_at, "", "function name where to insert a breakpoint")
 
 // compiler.cc
 DEFINE_bool(print_builtin_scopes, false, "print scopes for builtins")
 DEFINE_bool(print_scopes, false, "print scopes")
 DEFINE_bool(print_ir, false, "print the AST as seen by the backend")
+DEFINE_bool(print_graph_text, false,
+            "print a text representation of the flow graph")
 
 // contexts.cc
 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")
@@ skipping 107 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