Experimental parser: merge to r19637

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 206 matching lines @@
 DEFINE_bool(clever_optimizations, true,
             "Optimize object size, Array shift, DOM strings and string +")
 DEFINE_bool(pretenuring, true, "allocate objects in old space")
 // TODO(hpayer): We will remove this flag as soon as we have pretenuring
 // support for specific allocation sites.
 DEFINE_bool(pretenuring_call_new, false, "pretenure call new")
 DEFINE_bool(allocation_site_pretenuring, true,
             "pretenure with allocation sites")
 DEFINE_bool(trace_pretenuring, false,
             "trace pretenuring decisions of HAllocate instructions")
+DEFINE_bool(trace_pretenuring_statistics, false,
+            "trace allocation site pretenuring statistics")
 DEFINE_bool(track_fields, true, "track fields with only smi values")
 DEFINE_bool(track_double_fields, true, "track fields with double values")
 DEFINE_bool(track_heap_object_fields, true, "track fields with heap values")
 DEFINE_bool(track_computed_fields, true, "track computed boilerplate fields")
 DEFINE_implication(track_double_fields, track_fields)
 DEFINE_implication(track_heap_object_fields, track_fields)
 DEFINE_implication(track_computed_fields, track_fields)
 DEFINE_bool(smi_binop, true, "support smi representation in binary operations")
 
 // Flags for optimization types.
 DEFINE_bool(optimize_for_size, false,
             "Enables optimizations which favor memory size over execution "
             "speed.")
 
 // Flags for data representation optimizations
 DEFINE_bool(unbox_double_arrays, true, "automatically unbox arrays of doubles")
 DEFINE_bool(string_slices, true, "use string slices")
 
 // Flags for Crankshaft.
 DEFINE_bool(crankshaft, true, "use crankshaft")
 DEFINE_string(hydrogen_filter, "*", "optimization filter")
 DEFINE_bool(use_range, true, "use hydrogen range analysis")
 DEFINE_bool(use_gvn, true, "use hydrogen global value numbering")
+DEFINE_int(gvn_iterations, 3, "maximum number of GVN fix-point iterations")
 DEFINE_bool(use_canonicalizing, true, "use hydrogen instruction canonicalizing")
 DEFINE_bool(use_inlining, true, "use function inlining")
-DEFINE_bool(use_escape_analysis, false, "use hydrogen escape analysis")
+DEFINE_bool(use_escape_analysis, true, "use hydrogen escape analysis")
 DEFINE_bool(use_allocation_folding, true, "use allocation folding")
+DEFINE_bool(use_local_allocation_folding, false, "only fold in basic blocks")
+DEFINE_bool(use_write_barrier_elimination, true,
+            "eliminate write barriers targeting allocations in optimized code")
 DEFINE_int(max_inlining_levels, 5, "maximum number of inlining levels")
 DEFINE_int(max_inlined_source_size, 600,
            "maximum source size in bytes considered for a single inlining")
 DEFINE_int(max_inlined_nodes, 196,
            "maximum number of AST nodes considered for a single inlining")
 DEFINE_int(max_inlined_nodes_cumulative, 400,
            "maximum cumulative number of AST nodes considered for inlining")
 DEFINE_bool(loop_invariant_code_motion, true, "loop invariant code motion")
 DEFINE_bool(fast_math, true, "faster (but maybe less accurate) math functions")
 DEFINE_bool(collect_megamorphic_maps_from_stub_cache, true,
@@ skipping 78 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_bool(new_string_add, true, "enable new string addition")
-
 // Profiler flags.
 DEFINE_int(frame_count, 1, "number of stack frames inspected by the profiler")
-           // 0x1700 fits in the immediate field of an ARM instruction.
-DEFINE_int(interrupt_budget, 0x1700,
+           // 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")
 DEFINE_implication(trace_opt_verbose, trace_opt)
 
 // assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc
 DEFINE_bool(debug_code, false,
@@ skipping 19 matching lines @@
             "enable use of SDIV and UDIV instructions if available (ARM only)")
 DEFINE_bool(enable_movw_movt, false,
             "enable loading 32-bit constant by means of movw/movt "
             "instruction pairs (ARM only)")
 DEFINE_bool(enable_unaligned_accesses, true,
             "enable unaligned accesses for ARMv7 (ARM only)")
 DEFINE_bool(enable_32dregs, ENABLE_32DREGS_DEFAULT,
             "enable use of d16-d31 registers on ARM - this requires VFP3")
 DEFINE_bool(enable_vldr_imm, false,
             "enable use of constant pools for double immediate (ARM only)")
+DEFINE_bool(force_long_branches, false,
+            "force all emitted branches to be in long mode (MIPS only)")
 
 // bootstrapper.cc
 DEFINE_string(expose_natives_as, NULL, "expose natives in global object")
 DEFINE_string(expose_debug_as, NULL, "expose debug in global object")
 DEFINE_bool(expose_free_buffer, false, "expose freeBuffer extension")
 DEFINE_bool(expose_gc, false, "expose gc extension")
 DEFINE_string(expose_gc_as, NULL,
               "expose gc extension under the specified name")
 DEFINE_implication(expose_gc_as, expose_gc)
 DEFINE_bool(expose_externalize_string, false,
             "expose externalize string extension")
 DEFINE_bool(expose_trigger_failure, false, "expose trigger-failure extension")
 DEFINE_int(stack_trace_limit, 10, "number of stack frames to capture")
 DEFINE_bool(builtins_in_stack_traces, false,
             "show built-in functions in stack traces")
 DEFINE_bool(disable_native_files, false, "disable builtin natives files")
 
 // builtins-ia32.cc
 DEFINE_bool(inline_new, true, "use fast inline allocation")
 
-// checks.cc
-DEFINE_bool(stack_trace_on_abort, true,
-            "print a stack trace if an assertion failure occurs")
-
 // codegen-ia32.cc / codegen-arm.cc
 DEFINE_bool(trace_codegen, false,
             "print name of functions for which code is generated")
 DEFINE_bool(trace, false, "trace function calls")
 DEFINE_bool(mask_constants_with_cookie, true,
             "use random jit cookie to mask large constants")
 
 // codegen.cc
 DEFINE_bool(lazy, true, "use lazy compilation")
 DEFINE_bool(trace_opt, false, "trace lazy optimization")
@@ skipping 30 matching lines @@
 DEFINE_bool(trace_external_array_abuse, false,
             "trace out-of-bounds-accesses to external arrays")
 DEFINE_bool(trace_array_abuse, false,
             "trace out-of-bounds accesses to all arrays")
 DEFINE_implication(trace_array_abuse, trace_js_array_abuse)
 DEFINE_implication(trace_array_abuse, trace_external_array_abuse)
 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")
-DEFINE_bool(break_on_abort, true, "always cause a debug break before aborting")
+DEFINE_bool(hard_abort, true, "abort by crashing")
 
 // execution.cc
 // Slightly less than 1MB on 64-bit, since Windows' default stack size for
 // the main execution thread is 1MB for both 32 and 64-bit.
 DEFINE_int(stack_size, kPointerSize * 123,
            "default size of stack region v8 is allowed to use (in kBytes)")
 
 // frames.cc
 DEFINE_int(max_stack_trace_source_length, 300,
            "maximum length of function source code printed in a stack trace.")
@@ skipping 44 matching lines @@
 DEFINE_bool(incremental_marking, true, "use incremental marking")
 DEFINE_bool(incremental_marking_steps, true, "do incremental marking steps")
 DEFINE_bool(trace_incremental_marking, false,
             "trace progress of the incremental marking")
 DEFINE_bool(track_gc_object_stats, false,
             "track object counts and memory usage")
 DEFINE_bool(parallel_sweeping, true, "enable parallel sweeping")
 DEFINE_bool(concurrent_sweeping, false, "enable concurrent sweeping")
 DEFINE_int(sweeper_threads, 0,
            "number of parallel and concurrent sweeping threads")
+DEFINE_bool(job_based_sweeping, false, "enable job based sweeping")
 #ifdef VERIFY_HEAP
 DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
 #endif
 
 
 // heap-snapshot-generator.cc
 DEFINE_bool(heap_profiler_trace_objects, false,
             "Dump heap object allocations/movements/size_updates")
 
 
@@ skipping 16 matching lines @@
 DEFINE_bool(compact_code_space, true,
             "Compact code space on full non-incremental collections")
 DEFINE_bool(incremental_code_compaction, true,
             "Compact code space on full incremental collections")
 DEFINE_bool(cleanup_code_caches_at_gc, true,
             "Flush inline caches prior to mark compact collection and "
             "flush code caches in maps during mark compact cycle.")
 DEFINE_bool(use_marking_progress_bar, true,
             "Use a progress bar to scan large objects in increments when "
             "incremental marking is active.")
+DEFINE_bool(zap_code_space, true,
+            "Zap free memory in code space with 0xCC while sweeping.")
 DEFINE_int(random_seed, 0,
            "Default seed for initializing random generator "
            "(0, the default, means to use system random).")
 
 // objects.cc
 DEFINE_bool(use_verbose_printer, true, "allows verbose printing")
 
 // parser.cc
 DEFINE_bool(allow_natives_syntax, false, "allow natives syntax")
 DEFINE_bool(trace_parse, false, "trace parsing and preparsing")
 
-DEFINE_bool(trace_lexer, false, "trace lexing")
-
-// simulator-arm.cc and simulator-mips.cc
+// simulator-arm.cc, simulator-a64.cc and simulator-mips.cc
 DEFINE_bool(trace_sim, false, "Trace simulator execution")
+DEFINE_bool(debug_sim, false, "Enable debugging the simulator")
 DEFINE_bool(check_icache, false,
             "Check icache flushes in ARM and MIPS simulator")
 DEFINE_int(stop_sim_at, 0, "Simulator stop after x number of instructions")
+#ifdef V8_TARGET_ARCH_A64
+DEFINE_int(sim_stack_alignment, 16,
+           "Stack alignment in bytes in simulator. This must be a power of two "
+           "and it must be at least 16. 16 is default.")
+#else
 DEFINE_int(sim_stack_alignment, 8,
            "Stack alingment in bytes in simulator (4 or 8, 8 is default)")
+#endif
+DEFINE_int(sim_stack_size, 2 * MB / KB,
+           "Stack size of the A64 simulator in kBytes (default is 2 MB)")
+DEFINE_bool(log_regs_modified, true,
+            "When logging register values, only print modified registers.")
+DEFINE_bool(log_colour, true,
+            "When logging, try to use coloured output.")
+DEFINE_bool(ignore_asm_unimplemented_break, false,
+            "Don't break for ASM_UNIMPLEMENTED_BREAK macros.")
+DEFINE_bool(trace_sim_messages, false,
+            "Trace simulator debug messages. Implied by --trace-sim.")
 
 // isolate.cc
+DEFINE_bool(stack_trace_on_illegal, false,
+            "print stack trace when an illegal exception is thrown")
 DEFINE_bool(abort_on_uncaught_exception, false,
             "abort program (dump core) when an uncaught exception is thrown")
-DEFINE_bool(trace_exception, false,
-            "print stack trace when throwing exceptions")
 DEFINE_bool(randomize_hashes, true,
             "randomize hashes to avoid predictable hash collisions "
             "(with snapshots this option cannot override the baked-in seed)")
 DEFINE_int(hash_seed, 0,
            "Fixed seed to use to hash property keys (0 means random)"
            "(with snapshots this option cannot override the baked-in seed)")
 
 // snapshot-common.cc
 DEFINE_bool(profile_deserialization, false,
             "Print the time it takes to deserialize the snapshot.")
@@ skipping 184 matching lines @@
             "Enable perf linux profiler (basic support).")
 DEFINE_bool(perf_jit_prof, false,
             "Enable perf linux profiler (experimental annotate support).")
 DEFINE_string(gc_fake_mmap, "/tmp/__v8_gc__",
               "Specify the name of the file for fake gc mmap used in ll_prof")
 DEFINE_bool(log_internal_timer_events, false, "Time internal events.")
 DEFINE_bool(log_timer_events, false,
             "Time events including external callbacks.")
 DEFINE_implication(log_timer_events, log_internal_timer_events)
 DEFINE_implication(log_internal_timer_events, prof)
+DEFINE_bool(log_instruction_stats, false, "Log AArch64 instruction statistics.")
+DEFINE_string(log_instruction_file, "a64_inst.csv",
+              "AArch64 instruction statistics log file.")
+DEFINE_int(log_instruction_period, 1 << 22,
+           "AArch64 instruction statistics logging period.")
 
 DEFINE_bool(redirect_code_traces, false,
             "output deopt information and disassembly into file "
             "code-<pid>-<isolate id>.asm")
 DEFINE_string(redirect_code_traces_to, NULL,
             "output deopt information and disassembly into the given file")
 
+DEFINE_bool(hydrogen_track_positions, false,
+            "track source code positions when building IR")
+
 //
 // Disassembler only flags
 //
 #undef FLAG
 #ifdef ENABLE_DISASSEMBLER
 #define FLAG FLAG_FULL
 #else
 #define FLAG FLAG_READONLY
 #endif
 
@@ skipping 12 matching lines @@
             "test primary stub cache by disabling the secondary one")
 
 
 // codegen-ia32.cc / codegen-arm.cc
 DEFINE_bool(print_code, false, "print generated code")
 DEFINE_bool(print_opt_code, false, "print optimized code")
 DEFINE_bool(print_unopt_code, false, "print unoptimized code before "
             "printing optimized code based on it")
 DEFINE_bool(print_code_verbose, false, "print more information for code")
 DEFINE_bool(print_builtin_code, false, "print generated code for builtins")
-DEFINE_bool(emit_opt_code_positions, false,
-            "annotate optimize code with source code positions")
 
 #ifdef ENABLE_DISASSEMBLER
 DEFINE_bool(sodium, false, "print generated code output suitable for use with "
             "the Sodium code viewer")
 
 DEFINE_implication(sodium, print_code_stubs)
 DEFINE_implication(sodium, print_code)
 DEFINE_implication(sodium, print_opt_code)
-DEFINE_implication(sodium, emit_opt_code_positions)
+DEFINE_implication(sodium, hydrogen_track_positions)
 DEFINE_implication(sodium, code_comments)
 
 DEFINE_bool(print_all_code, false, "enable all flags related to printing code")
 DEFINE_implication(print_all_code, print_code)
 DEFINE_implication(print_all_code, print_opt_code)
 DEFINE_implication(print_all_code, print_unopt_code)
 DEFINE_implication(print_all_code, print_code_verbose)
 DEFINE_implication(print_all_code, print_builtin_code)
 DEFINE_implication(print_all_code, print_code_stubs)
 DEFINE_implication(print_all_code, code_comments)
@@ skipping 32 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