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clang-p2996/lld/ELF/Options.td
Alex Richardson 35c5e564e6 [ELF] Check the Elf_Rel addends for dynamic relocations 
There used to be many cases where addends for Elf_Rel were not emitted in
the final object file (mostly when building for MIPS64 since the input .o
files use RELA but the output uses REL). These cases have been fixed since,
but this patch adds a check to ensure that the written values are correct.
It is based on a previous patch that I added to the CHERI fork of LLD since
we were using MIPS64 as a baseline. The work has now almost entirely
shifted to RISC-V and Arm Morello (which use Elf_Rela), but I thought
it would be useful to upstream our local changes anyway.

This patch adds a (hidden) command line flag --check-dynamic-relocations
that can be used to enable these checks. It is also on by default in
assertions builds for targets that handle all dynamic relocations kinds
that LLD can emit in Target::getImplicitAddend(). Currently this is
enabled for ARM, MIPS, and I386.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D101450
2021-07-09 10:41:40 +01:00

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include "llvm/Option/OptParser.td"
// Convenience classes for long options which only accept two dashes. For lld
// specific or newer long options, we prefer two dashes to avoid collision with
// short options. For many others, we have to accept both forms to be compatible
// with GNU ld.
class FF<string name> : Flag<["--"], name>;
class JJ<string name>: Joined<["--"], name>;
multiclass EEq<string name, string help> {
def NAME: Separate<["--"], name>;
def NAME # _eq: Joined<["--"], name # "=">, Alias<!cast<Separate>(NAME)>,
HelpText<help>;
}
multiclass BB<string name, string help1, string help2> {
def NAME: Flag<["--"], name>, HelpText<help1>;
def no_ # NAME: Flag<["--"], "no-" # name>, HelpText<help2>;
}
// For options whose names are multiple letters, either one dash or
// two can precede the option name except those that start with 'o'.
class F<string name>: Flag<["--", "-"], name>;
class J<string name>: Joined<["--", "-"], name>;
multiclass Eq<string name, string help> {
def NAME: Separate<["--", "-"], name>;
def NAME # _eq: Joined<["--", "-"], name # "=">, Alias<!cast<Separate>(NAME)>,
HelpText<help>;
}
multiclass B<string name, string help1, string help2> {
def NAME: Flag<["--", "-"], name>, HelpText<help1>;
def no_ # NAME: Flag<["--", "-"], "no-" # name>, HelpText<help2>;
}
defm auxiliary: Eq<"auxiliary", "Set DT_AUXILIARY field to the specified name">;
def Bno_symbolic: F<"Bno-symbolic">, HelpText<"Don't bind default visibility defined symbols locally for -shared (default)">;
def Bsymbolic: F<"Bsymbolic">, HelpText<"Bind default visibility defined symbols locally for -shared">;
def Bsymbolic_functions: F<"Bsymbolic-functions">,
HelpText<"Bind default visibility defined function symbols locally for -shared">;
def Bdynamic: F<"Bdynamic">, HelpText<"Link against shared libraries (default)">;
def Bstatic: F<"Bstatic">, HelpText<"Do not link against shared libraries">;
def build_id: F<"build-id">, HelpText<"Alias for --build-id=fast">;
def build_id_eq: J<"build-id=">, HelpText<"Generate build ID note">,
MetaVarName<"[fast,md5,sha1,uuid,0x<hexstring>]">;
defm check_sections: B<"check-sections",
"Check section addresses for overlaps (default)",
"Do not check section addresses for overlaps">;
defm compress_debug_sections:
Eq<"compress-debug-sections", "Compress DWARF debug sections">,
MetaVarName<"[none,zlib]">;
defm defsym: Eq<"defsym", "Define a symbol alias">, MetaVarName<"<symbol>=<value>">;
defm optimize_bb_jumps: BB<"optimize-bb-jumps",
"Remove direct jumps at the end to the next basic block",
"Do not remove any direct jumps at the end to the next basic block (default)">;
defm fortran_common : BB<"fortran-common",
"Search archive members for definitions to override COMMON symbols (default)",
"Do not search archive members for definitions to override COMMON symbols">;
defm split_stack_adjust_size
: Eq<"split-stack-adjust-size",
"Specify adjustment to stack size when a split-stack function calls a "
"non-split-stack function">,
MetaVarName<"<value>">;
defm library_path:
Eq<"library-path", "Add a directory to the library search path">, MetaVarName<"<dir>">;
def O: JoinedOrSeparate<["-"], "O">, HelpText<"Optimize output file size">;
defm Tbss: Eq<"Tbss", "Same as --section-start with .bss as the sectionname">;
defm Tdata: Eq<"Tdata", "Same as --section-start with .data as the sectionname">;
defm Ttext: Eq<"Ttext", "Same as --section-start with .text as the sectionname">;
def Ttext_segment: Separate<["-", "--"], "Ttext-segment">;
defm allow_multiple_definition: B<"allow-multiple-definition",
"Allow multiple definitions",
"Do not allow multiple definitions (default)">;
defm allow_shlib_undefined: B<"allow-shlib-undefined",
"Allow unresolved references in shared libraries (default when linking a shared library)",
"Do not allow unresolved references in shared libraries (default when linking an executable)">;
defm apply_dynamic_relocs: BB<"apply-dynamic-relocs",
"Apply link-time values for dynamic relocations",
"Do not apply link-time values for dynamic relocations (default)">;
defm dependent_libraries: BB<"dependent-libraries",
"Process dependent library specifiers from input files (default)",
"Ignore dependent library specifiers from input files">;
defm as_needed: B<"as-needed",
"Only set DT_NEEDED for shared libraries if used",
"Always set DT_NEEDED for shared libraries (default)">;
defm call_graph_ordering_file:
Eq<"call-graph-ordering-file", "Layout sections to optimize the given callgraph">;
defm call_graph_profile_sort: BB<"call-graph-profile-sort",
"Reorder sections with call graph profile (default)",
"Do not reorder sections with call graph profile">;
// -chroot doesn't have a help text because it is an internal option.
def chroot: Separate<["--", "-"], "chroot">;
defm color_diagnostics: B<"color-diagnostics",
"Alias for --color-diagnostics=always",
"Alias for --color-diagnostics=never">;
def color_diagnostics_eq: J<"color-diagnostics=">,
HelpText<"Use colors in diagnostics (default: auto)">,
MetaVarName<"[auto,always,never]">;
def cref: FF<"cref">, HelpText<"Output cross reference table">;
defm define_common: B<"define-common",
"Assign space to common symbols",
"Do not assign space to common symbols">;
defm demangle: B<"demangle",
"Demangle symbol names (default)",
"Do not demangle symbol names">;
defm dependency_file: EEq<"dependency-file", "Write a dependency file">,
MetaVarName<"<file>">;
def disable_new_dtags: F<"disable-new-dtags">,
HelpText<"Disable new dynamic tags">;
def discard_all: F<"discard-all">, HelpText<"Delete all local symbols">;
def discard_locals: F<"discard-locals">,
HelpText<"Delete temporary local symbols">;
def discard_none: F<"discard-none">,
HelpText<"Keep all symbols in the symbol table">;
defm dynamic_linker: Eq<"dynamic-linker", "Which dynamic linker to use">;
defm dynamic_list : Eq<"dynamic-list",
"Read a list of dynamic symbols. (executable) Put matched non-local defined"
"symbols to the dynamic symbol table. (shared object) References to matched"
"non-local STV_DEFAULT symbols shouldn't be bound to definitions within the "
"shared object. Implies -Bsymbolic but does not set DF_SYMBOLIC">,
MetaVarName<"<file>">;
def eb: F<"EB">, HelpText<"Select the big-endian format in OUTPUT_FORMAT">;
def el: F<"EL">, HelpText<"Select the little-endian format in OUTPUT_FORMAT">;
defm eh_frame_hdr: B<"eh-frame-hdr",
"Request creation of .eh_frame_hdr section and PT_GNU_EH_FRAME segment header",
"Do not create .eh_frame_hdr section">;
def emit_relocs: F<"emit-relocs">, HelpText<"Generate relocations in output">;
def enable_new_dtags: F<"enable-new-dtags">,
HelpText<"Enable new dynamic tags (default)">;
def end_group: F<"end-group">,
HelpText<"Ignored for compatibility with GNU unless you pass --warn-backrefs">;
def end_lib: F<"end-lib">,
HelpText<"End a grouping of objects that should be treated as if they were together in an archive">;
defm entry: Eq<"entry", "Name of entry point symbol">,
MetaVarName<"<entry>">;
defm error_limit:
Eq<"error-limit", "Maximum number of errors to emit before stopping (0 = no limit)">;
def error_unresolved_symbols: F<"error-unresolved-symbols">,
HelpText<"Report unresolved symbols as errors">;
defm error_handling_script: EEq<"error-handling-script",
"Specify an error handling script">;
defm exclude_libs: Eq<"exclude-libs", "Exclude static libraries from automatic export">;
defm execute_only: BB<"execute-only",
"Mark executable sections unreadable",
"Mark executable sections readable (default)">;
defm export_dynamic: B<"export-dynamic",
"Put symbols in the dynamic symbol table",
"Do not put symbols in the dynamic symbol table (default)">;
defm export_dynamic_symbol : EEq<"export-dynamic-symbol",
"(executable) Put matched symbols in the dynamic symbol table. "
"(shared object) References to matched non-local STV_DEFAULT symbols "
"shouldn't be bound to definitions within the shared object. "
"Does not imply -Bsymbolic.">,
MetaVarName<"glob">;
defm fatal_warnings: B<"fatal-warnings",
"Treat warnings as errors",
"Do not treat warnings as errors (default)">;
defm filter: Eq<"filter", "Set DT_FILTER field to the specified name">;
defm fini: Eq<"fini", "Specify a finalizer function">, MetaVarName<"<symbol>">;
def fix_cortex_a53_843419: F<"fix-cortex-a53-843419">,
HelpText<"Apply fixes for AArch64 Cortex-A53 erratum 843419">;
def fix_cortex_a8: F<"fix-cortex-a8">,
HelpText<"Apply fixes for ARM Cortex-A8 erratum 657417">;
defm format: Eq<"format", "Change the input format of the inputs following this option">,
MetaVarName<"[default,elf,binary]">;
defm gc_sections: B<"gc-sections",
"Enable garbage collection of unused sections",
"Disable garbage collection of unused sections (default)">;
defm gdb_index: BB<"gdb-index",
"Generate .gdb_index section",
"Do not generate .gdb_index section (default)">;
defm gnu_unique: BB<"gnu-unique",
"Enable STB_GNU_UNIQUE symbol binding (default)",
"Disable STB_GNU_UNIQUE symbol binding">;
defm hash_style: Eq<"hash-style", "Specify hash style (sysv, gnu or both)">;
def help: F<"help">, HelpText<"Print option help">;
def icf_all: F<"icf=all">, HelpText<"Enable identical code folding">;
def icf_safe: F<"icf=safe">, HelpText<"Enable safe identical code folding">;
def icf_none: F<"icf=none">, HelpText<"Disable identical code folding (default)">;
def ignore_function_address_equality: F<"ignore-function-address-equality">,
HelpText<"lld can break the address equality of functions">;
def ignore_data_address_equality: F<"ignore-data-address-equality">,
HelpText<"lld can break the address equality of data">;
defm image_base: Eq<"image-base", "Set the base address">;
defm init: Eq<"init", "Specify an initializer function">,
MetaVarName<"<symbol>">;
defm just_symbols: Eq<"just-symbols", "Just link symbols">;
defm keep_unique: Eq<"keep-unique", "Do not fold this symbol during ICF">;
defm library: Eq<"library", "Root name of library to use">,
MetaVarName<"<libName>">;
def m: JoinedOrSeparate<["-"], "m">, HelpText<"Set target emulation">;
defm Map: Eq<"Map", "Print a link map to the specified file">;
defm merge_exidx_entries: B<"merge-exidx-entries",
"Enable merging .ARM.exidx entries (default)",
"Disable merging .ARM.exidx entries">;
defm mmap_output_file: BB<"mmap-output-file",
"Mmap the output file for writing (default)",
"Do not mmap the output file for writing">;
def nmagic: F<"nmagic">, MetaVarName<"<magic>">,
HelpText<"Do not page align sections, link against static libraries.">;
def nostdlib: F<"nostdlib">,
HelpText<"Only search directories specified on the command line">;
def no_dynamic_linker: F<"no-dynamic-linker">,
HelpText<"Inhibit output of .interp section">;
def noinhibit_exec: F<"noinhibit-exec">,
HelpText<"Retain the executable output file whenever it is still usable">;
def no_nmagic: F<"no-nmagic">, MetaVarName<"<magic>">,
HelpText<"Page align sections (default)">;
def no_omagic: F<"no-omagic">, MetaVarName<"<magic>">,
HelpText<"Do not set the text data sections to be writable, page align sections (default)">;
def no_undefined: F<"no-undefined">,
HelpText<"Report unresolved symbols even if the linker is creating a shared library">;
def o: JoinedOrSeparate<["-"], "o">, MetaVarName<"<path>">,
HelpText<"Path to file to write output">;
def oformat: Separate<["--"], "oformat">, MetaVarName<"<format>">,
HelpText<"Specify the binary format for the output object file">;
def omagic: FF<"omagic">, MetaVarName<"<magic>">,
HelpText<"Set the text and data sections to be readable and writable, do not page align sections, link against static libraries">;
defm orphan_handling:
Eq<"orphan-handling", "Control how orphan sections are handled when linker script used">;
defm pack_dyn_relocs:
Eq<"pack-dyn-relocs", "Pack dynamic relocations in the given format">,
MetaVarName<"[none,android,relr,android+relr]">;
defm use_android_relr_tags: BB<"use-android-relr-tags",
"Use SHT_ANDROID_RELR / DT_ANDROID_RELR* tags instead of SHT_RELR / DT_RELR*",
"Use SHT_RELR / DT_RELR* tags (default)">;
def pic_veneer: F<"pic-veneer">,
HelpText<"Always generate position independent thunks (veneers)">;
defm pie: B<"pie",
"Create a position independent executable",
"Do not create a position independent executable (default)">;
defm print_gc_sections: B<"print-gc-sections",
"List removed unused sections",
"Do not list removed unused sections (default)">;
defm print_icf_sections: B<"print-icf-sections",
"List identical folded sections",
"Do not list identical folded sections (default)">;
def print_archive_stats: J<"print-archive-stats=">,
HelpText<"Write archive usage statistics to the specified file. "
"Print the numbers of members and fetched members for each archive">;
defm print_symbol_order: Eq<"print-symbol-order",
"Print a symbol order specified by --call-graph-ordering-file into the specified file">;
def pop_state: F<"pop-state">,
HelpText<"Undo the effect of -push-state">;
def push_state: F<"push-state">,
HelpText<"Save the current state of -as-needed, -static and -whole-archive">;
def print_map: F<"print-map">,
HelpText<"Print a link map to the standard output">;
defm reproduce:
Eq<"reproduce",
"Write tar file containing inputs and command to reproduce link">;
defm rosegment: BB<"rosegment",
"Put read-only non-executable sections in their own segment (default)",
"Do not put read-only non-executable sections in their own segment">;
defm rpath: Eq<"rpath", "Add a DT_RUNPATH to the output">;
def relocatable: F<"relocatable">, HelpText<"Create relocatable object file">;
defm retain_symbols_file:
Eq<"retain-symbols-file", "Retain only the symbols listed in the file">,
MetaVarName<"<file>">;
defm script: Eq<"script", "Read linker script">;
defm section_start: Eq<"section-start", "Set address of section">,
MetaVarName<"<address>">;
def shared: F<"shared">, HelpText<"Build a shared object">;
defm soname: Eq<"soname", "Set DT_SONAME">;
defm sort_section:
Eq<"sort-section", "Specifies sections sorting rule when linkerscript is used">;
def start_group: F<"start-group">,
HelpText<"Ignored for compatibility with GNU unless you pass --warn-backrefs">;
def start_lib: F<"start-lib">,
HelpText<"Start a grouping of objects that should be treated as if they were together in an archive">;
def strip_all: F<"strip-all">, HelpText<"Strip all symbols. Implies --strip-debug">;
def strip_debug: F<"strip-debug">, HelpText<"Strip debugging information">;
defm symbol_ordering_file:
Eq<"symbol-ordering-file", "Layout sections to place symbols in the order specified by symbol ordering file">;
defm sysroot: Eq<"sysroot", "Set the system root">;
def target1_rel: F<"target1-rel">, HelpText<"Interpret R_ARM_TARGET1 as R_ARM_REL32">;
def target1_abs: F<"target1-abs">, HelpText<"Interpret R_ARM_TARGET1 as R_ARM_ABS32 (default)">;
defm target2:
Eq<"target2", "Interpret R_ARM_TARGET2 as <type>, where <type> is one of rel, abs, or got-rel">,
MetaVarName<"<type>">;
defm threads
: Eq<"threads",
"Number of threads. '1' disables multi-threading. By default all "
"available hardware threads are used">;
def time_trace: FF<"time-trace">, HelpText<"Record time trace">;
def time_trace_file_eq: JJ<"time-trace-file=">, HelpText<"Specify time trace output file">;
defm time_trace_granularity: EEq<"time-trace-granularity",
"Minimum time granularity (in microseconds) traced by time profiler">;
defm toc_optimize : BB<"toc-optimize",
"(PowerPC64) Enable TOC related optimizations (default)",
"(PowerPC64) Disable TOC related optimizations">;
defm pcrel_optimize : BB<"pcrel-optimize",
"(PowerPC64) Enable PC-relative optimizations (default)",
"(PowerPC64) Disable PC-relative optimizations">;
def trace: F<"trace">, HelpText<"Print the names of the input files">;
defm trace_symbol: Eq<"trace-symbol", "Trace references to symbols">;
defm undefined: Eq<"undefined", "Force undefined symbol during linking">,
MetaVarName<"<symbol>">;
defm undefined_glob: EEq<"undefined-glob", "Force undefined symbol during linking">,
MetaVarName<"<pattern>">;
def unique: F<"unique">, HelpText<"Creates a separate output section for every orphan input section">;
defm unresolved_symbols:
Eq<"unresolved-symbols", "Determine how to handle unresolved symbols">;
defm undefined_version: B<"undefined-version",
"Allow unused version in version script (default)",
"Report version scripts that refer undefined symbols">;
defm rsp_quoting: Eq<"rsp-quoting", "Quoting style for response files">,
MetaVarName<"[posix,windows]">;
def v: Flag<["-"], "v">, HelpText<"Display the version number">;
def verbose: F<"verbose">, HelpText<"Verbose mode">;
def version: F<"version">, HelpText<"Display the version number and exit">;
def power10_stubs: F<"power10-stubs">, HelpText<"Alias for --power10-stubs=auto">;
def no_power10_stubs: F<"no-power10-stubs">, HelpText<"Alias for --power10-stubs=no">;
def power10_stubs_eq:
J<"power10-stubs=">, HelpText<
"Enables Power10 instructions in all stubs without options, "
"options override previous flags."
"auto: Allow Power10 instructions in stubs if applicable."
"no: No Power10 instructions in stubs.">;
defm version_script: Eq<"version-script", "Read a version script">;
defm warn_backrefs: BB<"warn-backrefs",
"Warn about backward symbol references to fetch archive members",
"Do not warn about backward symbol references to fetch archive members (default)">;
defm warn_backrefs_exclude
: EEq<"warn-backrefs-exclude",
"Glob describing an archive (or an object file within --start-lib) "
"which should be ignored for --warn-backrefs.">,
MetaVarName<"<glob>">;
defm warn_common: B<"warn-common",
"Warn about duplicate common symbols",
"Do not warn about duplicate common symbols (default)">;
defm warn_ifunc_textrel: BB<"warn-ifunc-textrel",
"Warn about using ifunc symbols with text relocations",
"Do not warn about using ifunc symbols with text relocations (default)">;
defm warn_symbol_ordering: BB<"warn-symbol-ordering",
"Warn about problems with the symbol ordering file (default)",
"Do not warn about problems with the symbol ordering file">;
def warn_unresolved_symbols: F<"warn-unresolved-symbols">,
HelpText<"Report unresolved symbols as warnings">;
defm whole_archive: B<"whole-archive",
"Force load of all members in a static library",
"Do not force load of all members in a static library (default)">;
defm wrap : Eq<"wrap", "Redirect symbol references to __wrap_symbol and "
"__real_symbol references to symbol">,
MetaVarName<"<symbol>">;
def z: JoinedOrSeparate<["-"], "z">, MetaVarName<"<option>">,
HelpText<"Linker option extensions">;
def visual_studio_diagnostics_format : F<"vs-diagnostics">,
HelpText<"Format diagnostics for Visual Studio compatibility">;
// Aliases
def: Separate<["-"], "f">, Alias<auxiliary>, HelpText<"Alias for --auxiliary">;
def: F<"call_shared">, Alias<Bdynamic>, HelpText<"Alias for --Bdynamic">;
def: F<"dy">, Alias<Bdynamic>, HelpText<"Alias for --Bdynamic">;
def: F<"dn">, Alias<Bstatic>, HelpText<"Alias for --Bstatic">;
def: F<"non_shared">, Alias<Bstatic>, HelpText<"Alias for --Bstatic">;
def: F<"static">, Alias<Bstatic>, HelpText<"Alias for --Bstatic">;
def: Flag<["-"], "d">, Alias<define_common>, HelpText<"Alias for --define-common">;
def: F<"dc">, Alias<define_common>, HelpText<"Alias for --define-common">;
def: F<"dp">, Alias<define_common>, HelpText<"Alias for --define-common">;
def: Flag<["-"], "x">, Alias<discard_all>, HelpText<"Alias for --discard-all">;
def: Flag<["-"], "X">, Alias<discard_locals>, HelpText<"Alias for --discard-locals">;
def: Flag<["-"], "q">, Alias<emit_relocs>, HelpText<"Alias for --emit-relocs">;
def: Flag<["-"], ")">, Alias<end_group>, HelpText<"Alias for --end-group">;
def: JoinedOrSeparate<["-"], "e">, Alias<entry>, HelpText<"Alias for --entry">;
def: Flag<["-"], "E">, Alias<export_dynamic>, HelpText<"Alias for --export-dynamic">;
def: Separate<["-"], "F">, Alias<filter>, HelpText<"Alias for --filter">;
def: Separate<["-"], "b">, Alias<format>, HelpText<"Alias for --format">;
def: JoinedOrSeparate<["-"], "l">, Alias<library>, HelpText<"Alias for --library">;
def: JoinedOrSeparate<["-"], "L">, Alias<library_path>, HelpText<"Alias for --library-path">;
def: F<"no-pic-executable">, Alias<no_pie>, HelpText<"Alias for --no-pie">;
def: Flag<["-"], "n">, Alias<nmagic>, HelpText<"Alias for --nmagic">;
def: Flag<["-"], "N">, Alias<omagic>, HelpText<"Alias for --omagic">;
def: Joined<["--"], "output=">, Alias<o>, HelpText<"Alias for -o">;
def: Separate<["--"], "output">, Alias<o>, HelpText<"Alias for -o">;
def: F<"pic-executable">, Alias<pie>, HelpText<"Alias for --pie">;
def: Flag<["-"], "M">, Alias<print_map>, HelpText<"Alias for --print-map">;
def: Flag<["-"], "r">, Alias<relocatable>, HelpText<"Alias for --relocatable">;
def: JoinedOrSeparate<["-"], "R">, Alias<rpath>, HelpText<"Alias for --rpath">;
def: JoinedOrSeparate<["-"], "T">, Alias<script>, HelpText<"Alias for --script">;
def: F<"Bshareable">, Alias<shared>, HelpText<"Alias for --shared">;
def: JoinedOrSeparate<["-"], "h">, Alias<soname>, HelpText<"Alias for --soname">;
def: Flag<["-"], "(">, Alias<start_group>, HelpText<"Alias for --start-group">;
def: Flag<["-"], "s">, Alias<strip_all>, HelpText<"Alias for --strip-all">;
def: Flag<["-"], "S">, Alias<strip_debug>, HelpText<"Alias for --strip-debug">;
def: Flag<["-"], "t">, Alias<trace>, HelpText<"Alias for --trace">;
def: Joined<["-", "--"], "Ttext-segment=">, Alias<Ttext_segment>;
def: JoinedOrSeparate<["-"], "y">, Alias<trace_symbol>, HelpText<"Alias for --trace-symbol">;
def: JoinedOrSeparate<["-"], "u">, Alias<undefined>, HelpText<"Alias for --undefined">;
def: Flag<["-"], "V">, Alias<version>, HelpText<"Alias for --version">;
// LTO-related options.
def lto_aa_pipeline: JJ<"lto-aa-pipeline=">,
HelpText<"AA pipeline to run during LTO. Used in conjunction with -lto-newpm-passes">;
def lto_debug_pass_manager: FF<"lto-debug-pass-manager">,
HelpText<"Debug new pass manager">;
def lto_emit_asm: FF<"lto-emit-asm">,
HelpText<"Emit assembly code">;
defm lto_legacy_pass_manager: BB<"lto-legacy-pass-manager",
"Use the legacy pass manager in LLVM",
"Use the new pass manager in LLVM">;
def lto_newpm_passes: JJ<"lto-newpm-passes=">,
HelpText<"Passes to run during LTO">;
def lto_O: JJ<"lto-O">, MetaVarName<"<opt-level>">,
HelpText<"Optimization level for LTO">;
def lto_partitions: JJ<"lto-partitions=">,
HelpText<"Number of LTO codegen partitions">;
def lto_cs_profile_generate: FF<"lto-cs-profile-generate">,
HelpText<"Perform context sensitive PGO instrumentation">;
def lto_cs_profile_file: JJ<"lto-cs-profile-file=">,
HelpText<"Context sensitive profile file path">;
def lto_obj_path_eq: JJ<"lto-obj-path=">;
def lto_sample_profile: JJ<"lto-sample-profile=">,
HelpText<"Sample profile file path">;
defm lto_whole_program_visibility: BB<"lto-whole-program-visibility",
"Asserts that the LTO link has whole program visibility",
"Asserts that the LTO link does not have whole program visibility">;
def lto_pseudo_probe_for_profiling: F<"lto-pseudo-probe-for-profiling">,
HelpText<"Emit pseudo probes for sample profiling">;
def disable_verify: F<"disable-verify">;
defm mllvm: Eq<"mllvm", "Additional arguments to forward to LLVM's option processing">;
def opt_remarks_filename: Separate<["--"], "opt-remarks-filename">,
HelpText<"YAML output file for optimization remarks">;
defm opt_remarks_hotness_threshold: EEq<"opt-remarks-hotness-threshold",
"Minimum profile count required for an optimization remark to be output."
" Use 'auto' to apply the threshold from profile summary.">,
MetaVarName<"<value>">;
def opt_remarks_passes: Separate<["--"], "opt-remarks-passes">,
HelpText<"Regex for the passes that need to be serialized to the output file">;
def opt_remarks_with_hotness: FF<"opt-remarks-with-hotness">,
HelpText<"Include hotness information in the optimization remarks file">;
def opt_remarks_format: Separate<["--"], "opt-remarks-format">,
HelpText<"The format used for serializing remarks (default: YAML)">;
def save_temps: F<"save-temps">, HelpText<"Save intermediate LTO compilation results">;
def lto_basic_block_sections: JJ<"lto-basic-block-sections=">,
HelpText<"Enable basic block sections for LTO">;
defm lto_unique_basic_block_section_names: BB<"lto-unique-basic-block-section-names",
"Give unique names to every basic block section for LTO",
"Do not give unique names to every basic block section for LTO (default)">;
defm shuffle_sections: EEq<"shuffle-sections",
"Shuffle matched sections using the given seed before mapping them to the output sections. "
"If -1, reverse the section order. If 0, use a random seed">,
MetaVarName<"<section-glob>=<seed>">;
def thinlto_cache_dir: JJ<"thinlto-cache-dir=">,
HelpText<"Path to ThinLTO cached object file directory">;
defm thinlto_cache_policy: EEq<"thinlto-cache-policy", "Pruning policy for the ThinLTO cache">;
def thinlto_emit_imports_files: FF<"thinlto-emit-imports-files">;
def thinlto_index_only: FF<"thinlto-index-only">;
def thinlto_index_only_eq: JJ<"thinlto-index-only=">;
def thinlto_jobs: JJ<"thinlto-jobs=">,
HelpText<"Number of ThinLTO jobs. Default to --threads=">;
def thinlto_object_suffix_replace_eq: JJ<"thinlto-object-suffix-replace=">;
def thinlto_prefix_replace_eq: JJ<"thinlto-prefix-replace=">;
def thinlto_single_module_eq: JJ<"thinlto-single-module=">,
HelpText<"Specific a single module to compile in ThinLTO mode, for debugging only">;
def: J<"plugin-opt=O">, Alias<lto_O>, HelpText<"Alias for --lto-O">;
def: F<"plugin-opt=debug-pass-manager">,
Alias<lto_debug_pass_manager>, HelpText<"Alias for --lto-debug-pass-manager">;
def: F<"plugin-opt=disable-verify">, Alias<disable_verify>, HelpText<"Alias for --disable-verify">;
def plugin_opt_dwo_dir_eq: J<"plugin-opt=dwo_dir=">,
HelpText<"Directory to store .dwo files when LTO and debug fission are used">;
def plugin_opt_emit_asm: F<"plugin-opt=emit-asm">,
Alias<lto_emit_asm>, HelpText<"Alias for --lto-emit-asm">;
def plugin_opt_emit_llvm: F<"plugin-opt=emit-llvm">;
def: J<"plugin-opt=jobs=">, Alias<thinlto_jobs>, HelpText<"Alias for --thinlto-jobs">;
def: J<"plugin-opt=lto-partitions=">, Alias<lto_partitions>, HelpText<"Alias for --lto-partitions">;
def plugin_opt_mcpu_eq: J<"plugin-opt=mcpu=">;
def: F<"plugin-opt=new-pass-manager">,
Alias<no_lto_legacy_pass_manager>, HelpText<"Alias for --no-lto-legacy-pass-manager">;
def: F<"plugin-opt=legacy-pass-manager">,
Alias<lto_legacy_pass_manager>, HelpText<"Alias for --no-legacy-pass-manager">;
def: F<"plugin-opt=cs-profile-generate">,
Alias<lto_cs_profile_generate>, HelpText<"Alias for --lto-cs-profile-generate">;
def: J<"plugin-opt=cs-profile-path=">,
Alias<lto_cs_profile_file>, HelpText<"Alias for --lto-cs-profile-file">;
def: J<"plugin-opt=obj-path=">,
Alias<lto_obj_path_eq>,
HelpText<"Alias for --lto-obj-path=">;
def: J<"plugin-opt=opt-remarks-filename=">,
Alias<opt_remarks_filename>,
HelpText<"Alias for --opt-remarks-filename">;
def: J<"plugin-opt=opt-remarks-passes=">,
Alias<opt_remarks_passes>,
HelpText<"Alias for --opt-remarks-passes">;
def: J<"plugin-opt=opt-remarks-format=">,
Alias<opt_remarks_format>,
HelpText<"Alias for --opt-remarks-format">;
def: F<"plugin-opt=opt-remarks-with-hotness">,
Alias<opt_remarks_with_hotness>,
HelpText<"Alias for --opt-remarks-with_hotness">;
def: J<"plugin-opt=opt-remarks-hotness-threshold=">,
Alias<opt_remarks_hotness_threshold>,
HelpText<"Alias for --opt-remarks-hotness-threshold">;
def: J<"plugin-opt=pseudo-probe-for-profiling">,
Alias<lto_pseudo_probe_for_profiling>, HelpText<"Alias for --lto-pseudo-probe-for-profiling">;
def: J<"plugin-opt=sample-profile=">,
Alias<lto_sample_profile>, HelpText<"Alias for --lto-sample-profile">;
def: F<"plugin-opt=save-temps">, Alias<save_temps>, HelpText<"Alias for --save-temps">;
def: F<"plugin-opt=thinlto-emit-imports-files">,
Alias<thinlto_emit_imports_files>,
HelpText<"Alias for --thinlto-emit-imports-files">;
def: F<"plugin-opt=thinlto-index-only">,
Alias<thinlto_index_only>,
HelpText<"Alias for --thinlto-index-only">;
def: J<"plugin-opt=thinlto-index-only=">,
Alias<thinlto_index_only_eq>,
HelpText<"Alias for --thinlto-index-only=">;
def: J<"plugin-opt=thinlto-object-suffix-replace=">,
Alias<thinlto_object_suffix_replace_eq>,
HelpText<"Alias for --thinlto-object-suffix-replace=">;
def: J<"plugin-opt=thinlto-prefix-replace=">,
Alias<thinlto_prefix_replace_eq>,
HelpText<"Alias for --thinlto-prefix-replace=">;
// Ignore LTO plugin-related options.
// clang -flto passes -plugin and -plugin-opt to the linker. This is required
// for ld.gold and ld.bfd to get LTO working. But it's not for lld which doesn't
// rely on a plugin. Instead of detecting which linker is used on clang side we
// just ignore the option on lld side as it's easier. In fact, the linker could
// be called 'ld' and understanding which linker is used would require parsing of
// --version output.
defm plugin: Eq<"plugin", "Ignored for compatibility with GNU linkers">;
def plugin_opt_eq_minus: J<"plugin-opt=-">,
HelpText<"Specify an LLVM option for compatibility with LLVMgold.so">;
def: J<"plugin-opt=thinlto">;
// Ignore GCC collect2 LTO plugin related options. Note that we don't support
// GCC LTO, but GCC collect2 passes these options even in non-LTO mode.
def: J<"plugin-opt=-fresolution=">;
def: J<"plugin-opt=-pass-through=">;
// This may be either an unhandled LLVMgold.so feature or GCC passed
// -plugin-opt=path/to/{liblto_plugin.so,lto-wrapper}
def plugin_opt_eq : J<"plugin-opt=">;
// Options listed below are silently ignored for now for compatibility.
def: F<"detect-odr-violations">;
def: Flag<["-"], "g">;
def: F<"long-plt">;
def: F<"no-add-needed">;
def: F<"no-copy-dt-needed-entries">;
def: F<"no-ctors-in-init-array">;
def: F<"no-keep-memory">;
def: F<"no-pipeline-knowledge">;
def: F<"no-relax">;
def: F<"no-warn-mismatch">;
def: Flag<["-"], "p">;
def: Separate<["--", "-"], "rpath-link">;
def: J<"rpath-link=">;
def: F<"secure-plt">;
def: F<"sort-common">;
def: F<"stats">;
def: F<"warn-execstack">;
def: F<"warn-once">;
def: F<"warn-shared-textrel">;
def: JoinedOrSeparate<["-"], "G">;
def: F<"Qy">;
// Hidden option used for testing MIPS multi-GOT implementation.
defm mips_got_size:
Eq<"mips-got-size", "Max size of a single MIPS GOT. 0x10000 by default.">,
Flags<[HelpHidden]>;
// Hidden option used to opt-in to additional output checks.
defm check_dynamic_relocations: BB<"check-dynamic-relocations",
"Perform additional validation of the written dynamic relocations",
"Do not perform additional validation of the written dynamic relocations">,
Flags<[HelpHidden]>;
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