--- a/gcc/common.opt	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/common.opt	Thu Feb 13 11:34:05 2020 +0900
@@ -1,6 +1,6 @@
 ; Options for the language- and target-independent parts of the compiler.
 
-; Copyright (C) 2003-2018 Free Software Foundation, Inc.
+; Copyright (C) 2003-2020 Free Software Foundation, Inc.
 ;
 ; This file is part of GCC.
 ;
@@ -63,9 +63,6 @@
 Variable
 bool flag_warn_unused_result = false
 
-Variable
-int *param_values
-
 ; Nonzero if we should write GIMPLE bytecode for link-time optimization.
 Variable
 int flag_generate_lto
@@ -437,13 +434,6 @@
 fversion
 Common Driver Alias(-version)
 
--param
-Common Separate
---param <param>=<value>	Set parameter <param> to value.  See below for a complete list of parameters.
-
--param=
-Common Joined Alias(-param)
-
 -sysroot
 Driver Separate Alias(-sysroot=)
 
@@ -551,8 +541,12 @@
 Warn about inappropriate attribute usage.
 
 Wattribute-alias
-Common Var(warn_attributes) Init(1) Warning
-Warn about type safety and similar errors in attribute alias and related.
+Common Alias(Wattribute_alias=, 1, 0) Warning
+Warn about type safety and similar errors and mismatches in declarations with alias attributes.
+
+Wattribute-alias=
+Common Joined RejectNegative UInteger Var(warn_attribute_alias) Init(1) Warning IntegerRange(0, 2)
+Warn about type safety and similar errors and mismatches in declarations with alias attributes.
 
 Wcannot-profile
 Common Var(warn_cannot_profile) Init(1) Warning
@@ -571,6 +565,14 @@
 Common Var(warn_cpp) Init(1) Warning
 Warn when a #warning directive is encountered.
 
+Wattribute-warning
+Common Var(warn_attribute_warning) Init(1) Warning
+Warn about uses of __attribute__((warning)) declarations.
+
+Wdeprecated
+Common Var(warn_deprecated) Init(1) Warning
+Warn if a deprecated compiler feature, class, method, or field is used.
+
 Wdeprecated-declarations
 Common Var(warn_deprecated_decl) Init(1) Warning
 Warn about uses of __attribute__((deprecated)) declarations.
@@ -615,7 +617,7 @@
 Warn when a switch case falls through.
 
 Winline
-Common Var(warn_inline) Warning
+Common Var(warn_inline) Warning Optimization
 Warn when an inlined function cannot be inlined.
 
 Winvalid-memory-model
@@ -939,6 +941,8 @@
 ; 13: Fixes the accidental change in 12 to the calling convention for classes
 ;     with deleted copy constructor and trivial move constructor.
 ;     Default in G++ 8.2.
+; 14: Corrects the mangling of nullptr expression.
+;     Default in G++ 10.
 ;
 ; Additional positive integers will be assigned as new versions of
 ; the ABI become the default version of the ABI.
@@ -981,6 +985,14 @@
 falign-loops=
 Common RejectNegative Joined Var(str_align_loops) Optimization
 
+fallow-store-data-races
+Common Report Var(flag_store_data_races) Optimization
+Allow the compiler to introduce new data races on stores.
+
+fanalyzer
+Common Var(flag_analyzer)
+Enable static analysis pass.
+
 fargument-alias
 Common Ignore
 Does nothing. Preserved for backward compatibility.
@@ -1064,16 +1076,24 @@
 Use profiling information for branch probabilities.
 
 fbranch-target-load-optimize
-Common Report Var(flag_branch_target_load_optimize) Optimization
-Perform branch target load optimization before prologue / epilogue threading.
+Common Ignore
+Does nothing.  Preserved for backward compatibility.
 
 fbranch-target-load-optimize2
-Common Report Var(flag_branch_target_load_optimize2) Optimization
-Perform branch target load optimization after prologue / epilogue threading.
+Common Ignore
+Does nothing.  Preserved for backward compatibility.
 
 fbtr-bb-exclusive
-Common Report Var(flag_btr_bb_exclusive) Optimization
-Restrict target load migration not to re-use registers in any basic block.
+Common Ignore
+Does nothing.  Preserved for backward compatibility.
+
+fcallgraph-info
+Common Report RejectNegative Var(flag_callgraph_info) Init(NO_CALLGRAPH_INFO);
+Output callgraph information on a per-file basis.
+
+fcallgraph-info=
+Common Report RejectNegative Joined
+Output callgraph information on a per-file basis with decorations.
 
 fcall-saved-
 Common Joined RejectNegative Var(common_deferred_options) Defer
@@ -1115,8 +1135,8 @@
 Looks for opportunities to reduce stack adjustments and stack references.
 
 fcommon
-Common Report Var(flag_no_common,0)
-Do not put uninitialized globals in the common section.
+Common Report Var(flag_no_common,0) Init(1)
+Put uninitialized globals in the common section.
 
 fcompare-debug
 Driver
@@ -1172,7 +1192,7 @@
 
 fdbg-cnt=
 Common RejectNegative Joined Var(common_deferred_options) Defer
--fdbg-cnt=<counter>[:<lower_limit>]:<upper_limit>[,<counter>:...]	Set the debug counter limit.
+-fdbg-cnt=<counter>[:<lower_limit1>-]<upper_limit1>[:<lower_limit2>-<upper_limit2>:...][,<counter>:...]	Set the debug counter limit.
 
 fdebug-prefix-map=
 Common Joined RejectNegative Var(common_deferred_options) Defer
@@ -1239,11 +1259,11 @@
 
 fdiagnostics-show-labels
 Common Var(flag_diagnostics_show_labels) Init(1)
-Show labels annotating ranges of source code when showing source
+Show labels annotating ranges of source code when showing source.
 
 fdiagnostics-show-line-numbers
 Common Var(flag_diagnostics_show_line_numbers) Init(1)
-Show line numbers in the left margin when showing source
+Show line numbers in the left margin when showing source.
 
 fdiagnostics-color
 Common Alias(fdiagnostics-color=,always,never)
@@ -1269,6 +1289,43 @@
 EnumValue
 Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO)
 
+fdiagnostics-urls=
+Driver Common Joined RejectNegative Var(flag_diagnostics_show_urls) Enum(diagnostic_url_rule) Init(DIAGNOSTICS_URL_AUTO)
+-fdiagnostics-urls=[never|always|auto]	Embed URLs in diagnostics.
+
+; Required for these enum values.
+SourceInclude
+diagnostic-url.h
+
+Enum
+Name(diagnostic_url_rule) Type(int)
+
+EnumValue
+Enum(diagnostic_url_rule) String(never) Value(DIAGNOSTICS_URL_NO)
+
+EnumValue
+Enum(diagnostic_url_rule) String(always) Value(DIAGNOSTICS_URL_YES)
+
+EnumValue
+Enum(diagnostic_url_rule) String(auto) Value(DIAGNOSTICS_URL_AUTO)
+
+fdiagnostics-format=
+Common Joined RejectNegative Enum(diagnostics_output_format)
+-fdiagnostics-format=[text|json] Select output format.
+
+; Required for these enum values.
+SourceInclude
+diagnostic.h
+
+Enum
+Name(diagnostics_output_format) Type(int)
+
+EnumValue
+Enum(diagnostics_output_format) String(text) Value(DIAGNOSTICS_OUTPUT_FORMAT_TEXT)
+
+EnumValue
+Enum(diagnostics_output_format) String(json) Value(DIAGNOSTICS_OUTPUT_FORMAT_JSON)
+
 fdiagnostics-parseable-fixits
 Common Var(flag_diagnostics_parseable_fixits)
 Print fix-it hints in machine-readable form.
@@ -1281,9 +1338,33 @@
 Common Var(flag_diagnostics_show_option) Init(1)
 Amend appropriate diagnostic messages with the command line option that controls them.
 
+fdiagnostics-show-cwe
+Common Var(flag_diagnostics_show_cwe) Init(1)
+Print CWE identifiers for diagnostic messages, where available.
+
+fdiagnostics-path-format=
+Common Joined RejectNegative Var(flag_diagnostics_path_format) Enum(diagnostic_path_format) Init(DPF_INLINE_EVENTS)
+Specify how to print any control-flow path associated with a diagnostic.
+
+Enum
+Name(diagnostic_path_format) Type(int)
+
+EnumValue
+Enum(diagnostic_path_format) String(none) Value(DPF_NONE)
+
+EnumValue
+Enum(diagnostic_path_format) String(separate-events) Value(DPF_SEPARATE_EVENTS)
+
+EnumValue
+Enum(diagnostic_path_format) String(inline-events) Value(DPF_INLINE_EVENTS)
+
+fdiagnostics-show-path-depths
+Common Var(flag_diagnostics_show_path_depths) Init(0)
+Show stack depths of events in paths.
+
 fdiagnostics-minimum-margin-width=
 Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6)
-Set minimum width of left margin of source code when showing source
+Set minimum width of left margin of source code when showing source.
 
 fdisable-
 Common Joined RejectNegative Var(common_deferred_options) Defer
@@ -1350,7 +1431,7 @@
 Perform interprocedural reduction of aggregates.
 
 feliminate-unused-debug-symbols
-Common Report Var(flag_debug_only_used_symbols)
+Common Report Var(flag_debug_only_used_symbols) Init(1)
 Perform unused symbol elimination in debug info.
 
 feliminate-unused-debug-types
@@ -1370,7 +1451,7 @@
 Perform a number of minor, expensive optimizations.
 
 fexcess-precision=
-Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) SetByCombined
+Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision) Init(EXCESS_PRECISION_DEFAULT) Optimization SetByCombined
 -fexcess-precision=[fast|standard]	Specify handling of excess floating-point precision.
 
 Enum
@@ -1408,6 +1489,10 @@
 Common Report Var(flag_finite_math_only) Optimization SetByCombined
 Assume no NaNs or infinities are generated.
 
+ffinite-loops
+Common Report Var(flag_finite_loops) Optimization
+Assume that loops with an exit will terminate and not loop indefinitely.
+
 ffixed-
 Common Joined RejectNegative Var(common_deferred_options) Defer
 -ffixed-<register>	Mark <register> as being unavailable to the compiler.
@@ -1492,7 +1577,7 @@
 
 fgnat-encodings=
 Common Enum(dwarf_gnat_encodings) Joined RejectNegative Report Undocumented Var(gnat_encodings)
--fgnat-encodings=[all|gdb|minimal]	Select the balance between GNAT encodings and standard DWARF emitted in the debug information
+-fgnat-encodings=[all|gdb|minimal]	Select the balance between GNAT encodings and standard DWARF emitted in the debug information.
 
 ; This option is not documented yet as its semantics will change.
 fgraphite
@@ -1718,7 +1803,15 @@
 
 fipa-reference
 Common Report Var(flag_ipa_reference) Init(0) Optimization
-Discover readonly and non addressable static variables.
+Discover read-only and non addressable static variables.
+
+fipa-reference-addressable
+Common Report Var(flag_ipa_reference_addressable) Init(0) Optimization
+Discover read-only, write-only and non-addressable static variables.
+
+fipa-stack-alignment
+Common Report Var(flag_ipa_stack_alignment) Init(1) Optimization
+Reduce stack alignment on call sites if possible.
 
 fipa-matrix-reorg
 Common Ignore
@@ -1847,12 +1940,12 @@
 
 ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
 flto-compression-level=
-Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) IntegerRange(0, 9)
--flto-compression-level=<number>	Use zlib compression level <number> for IL.
+Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) IntegerRange(0, 19)
+-flto-compression-level=<number>	Use zlib/zstd compression level <number> for IL.
 
 flto-odr-type-merging
-Common Report Var(flag_lto_odr_type_mering) Init(1)
-Merge C++ types using One Definition Rule.
+Common Ignore
+Does nothing.  Preserved for backward compatibility.
 
 flto-report
 Common Report Var(flag_lto_report) Init(0)
@@ -1914,7 +2007,7 @@
 Use the RTL dead code elimination pass.
 
 fdse
-Common Var(flag_dse) Init(1) Optimization
+Common Var(flag_dse) Init(0) Optimization
 Use the RTL dead store elimination pass.
 
 freschedule-modulo-scheduled-loops
@@ -2055,6 +2148,10 @@
 Set the top-level directory for storing the profile data.
 The default is 'pwd'.
 
+fprofile-note=
+Common Joined RejectNegative Var(profile_note_location)
+Select the name for storing the profile note file.
+
 fprofile-correction
 Common Report Var(flag_profile_correction)
 Enable correction of flow inconsistent profile data input.
@@ -2063,6 +2160,14 @@
 Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE)
 -fprofile-update=[single|atomic|prefer-atomic]	Set the profile update method.
 
+fprofile-filter-files=
+Common Joined RejectNegative Var(flag_profile_filter_files)
+Instrument only functions from files where names match any regular expression (separated by a semi-colon).
+
+fprofile-exclude-files=
+Common Joined RejectNegative Var(flag_profile_exclude_files)
+Instrument only functions from files where names do not match all the regular expressions (separated by a semi-colon).
+
 Enum
 Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs)
 
@@ -2083,6 +2188,10 @@
 Common Joined RejectNegative
 Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=.
 
+fprofile-partial-training
+Common Report Var(flag_profile_partial_training) Optimization
+Do not assume that functions never executed during the train run are cold.
+
 fprofile-use
 Common Var(flag_profile_use)
 Enable common options for performing profile feedback directed optimizations.
@@ -2100,7 +2209,7 @@
 Report on consistency of profile.
 
 fprofile-reorder-functions
-Common Report Var(flag_profile_reorder_functions)
+Common Report Var(flag_profile_reorder_functions) Optimization
 Enable function reordering that improves code placement.
 
 fpatchable-function-entry=
@@ -2140,6 +2249,28 @@
 flifetime-dse=
 Common Joined RejectNegative UInteger Var(flag_lifetime_dse) Optimization IntegerRange(0, 2)
 
+flive-patching
+Common RejectNegative Alias(flive-patching=,inline-clone) Optimization
+
+flive-patching=
+Common Report Joined RejectNegative Enum(live_patching_level) Var(flag_live_patching) Init(LIVE_PATCHING_NONE) Optimization
+-flive-patching=[inline-only-static|inline-clone]	Control IPA
+optimizations to provide a safe compilation for live-patching.  At the same
+time, provides multiple-level control on the enabled IPA optimizations.
+
+Enum
+Name(live_patching_level) Type(enum live_patching_level) UnknownError(unknown Live-Patching Level %qs)
+
+EnumValue
+Enum(live_patching_level) String(inline-only-static) Value(LIVE_PATCHING_INLINE_ONLY_STATIC)
+
+EnumValue
+Enum(live_patching_level) String(inline-clone) Value(LIVE_PATCHING_INLINE_CLONE)
+
+fallocation-dce
+Common Report Var(flag_allocation_dce) Init(1) Optimization
+Tell DCE to remove unused C++ allocations.
+
 flive-range-shrinkage
 Common Report Var(flag_live_range_shrinkage) Init(0) Optimization
 Relief of register pressure through live range shrinkage.
@@ -2319,7 +2450,7 @@
 Does nothing.  Preserved for backward compatibility.
 
 free
-Common Report Var(flag_ree) Init(0)
+Common Report Var(flag_ree) Init(0) Optimization
 Turn on Redundant Extensions Elimination pass.
 
 fshow-column
@@ -2359,6 +2490,10 @@
 Common Report Var(flag_split_wide_types) Optimization
 Split wide types into independent registers.
 
+fsplit-wide-types-early
+Common Report Var(flag_split_wide_types_early) Optimization
+Split wide types into independent registers earlier.
+
 fssa-backprop
 Common Report Var(flag_ssa_backprop) Init(1) Optimization
 Enable backward propagation of use properties at the SSA level.
@@ -2479,7 +2614,7 @@
 Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC)
 
 ftoplevel-reorder
-Common Report Var(flag_toplevel_reorder) Init(2)
+Common Report Var(flag_toplevel_reorder) Init(2) Optimization
 Reorder top level functions, variables, and asms.
 
 ftracer
@@ -2716,6 +2851,10 @@
 Common Report Var(flag_split_loops) Optimization
 Perform loop splitting.
 
+fversion-loops-for-strides
+Common Report Var(flag_version_loops_for_strides) Optimization
+Version loops based on whether indices have a stride of one.
+
 funwind-tables
 Common Report Var(flag_unwind_tables) Optimization
 Just generate unwind tables for exception handling.
@@ -2728,6 +2867,10 @@
 Common Driver Negative(fuse-ld=bfd)
 Use the gold linker instead of the default linker.
 
+fuse-ld=lld
+Common Driver Negative(fuse-ld=lld)
+Use the lld LLVM linker instead of the default linker.
+
 fuse-linker-plugin
 Common Undocumented Var(flag_use_linker_plugin)
 
@@ -2898,26 +3041,26 @@
 
 gas-loc-support
 Common Driver Var(dwarf2out_as_loc_support) Init(2)
-Assume assembler support for (DWARF2+) .loc directives
+Assume assembler support for (DWARF2+) .loc directives.
 
 gas-locview-support
 Common Driver Var(dwarf2out_as_locview_support) Init(2)
-Assume assembler support for view in (DWARF2+) .loc directives
+Assume assembler support for view in (DWARF2+) .loc directives.
 
 gcoff
-Common Driver Deprecated
+Common Driver WarnRemoved
 Does nothing.  Preserved for backward compatibility.
 
 gcoff1
-Common Driver Deprecated
+Common Driver WarnRemoved
 Does nothing.  Preserved for backward compatibility.
 
 gcoff2
-Common Driver Deprecated
+Common Driver WarnRemoved
 Does nothing.  Preserved for backward compatibility.
 
 gcoff3
-Common Driver Deprecated
+Common Driver WarnRemoved
 Does nothing.  Preserved for backward compatibility.
 
 gcolumn-info
@@ -2938,11 +3081,11 @@
 
 ginline-points
 Common Driver Var(debug_inline_points) Init(2)
-Generate extended entry point information for inlined functions
+Generate extended entry point information for inlined functions.
 
 ginternal-reset-location-views
 Common Driver Var(debug_internal_reset_location_views) Init(2)
-Compute locview reset points based on insn length estimates
+Compute locview reset points based on insn length estimates.
 
 gno-
 RejectNegative Joined Undocumented