%% -*- erlang-indent-level: 2 -*- %% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2001-2015. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. %% You may obtain a copy of the License at %% %% http://www.apache.org/licenses/LICENSE-2.0 %% %% Unless required by applicable law or agreed to in writing, software %% distributed under the License is distributed on an "AS IS" BASIS, %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %% See the License for the specific language governing permissions and %% limitations under the License. %% %% %CopyrightEnd% %% %% ==================================================================== %% Copyright (c) 1998 by Erik Johansson. All Rights Reserved %% ==================================================================== %% Filename : hipe.erl %% Module : hipe %% Purpose : %% Notes : %% History : * 1998-01-28 Erik Johansson (happi@it.uu.se): Created. %% ==================================================================== %% @doc This is the direct interface to the HiPE compiler. %% %%

Normal use

%% %%

The normal way to native-compile an Erlang module using HiPE is to %% include the atom native in the Erlang compiler options, %% as in: %% %%

    1> c(my_module, [native]).

%% %%

Options to the HiPE compiler are then passed as follows: %% %%

    1> c(my_module, [native,{hipe,Options}]).

%% %%

For on-line help in the Erlang shell, call hipe:help(). Details on HiPE compiler %% options are given by hipe:help_options().

%% %%

Using the direct interface - for advanced users only

%% %% To compile a module to native code and automatically load the code %% into memory, call hipe:c(Module) or hipe:c(Module, Options). Note that all %% options are specific to the HiPE compiler. See the function index for other compiler functions. %% %%

Main Options

%% %% Options are processed in the order they appear in the list; an %% early option will shadow a later one. %%
%%
o0, 'O0', o1, 'O1', o2, 'O2', o3, 'O3'
%%
Set optimization level (default 2).
%% %%
load
%%
Automatically load the code into memory after compiling.
%% %%
time
%%
Reports the compilation times for the different stages %% of the compiler. Call hipe:help_option(time) for %% details.
%% %%
{timeout, Time}
%%
Sets the time the compiler is allowed to use for the %% compilation. Time is time in ms or the atom %% infinity (the default).
%% %%
verbose
%%
Make the HiPE compiler output information about what it is %% being done.
%%
%% %%

Advanced Options

%% %% Note: You can also specify {Option, false} to turn a %% particular option off, or {Option, true} to force it on. %% Boolean-valued (true/false) options also %% have negative-form aliases, e.g. no_load = {load, %% false}. %% %%

%%
debug
%%
Outputs internal debugging information during %% compilation.
%% %%
icode_ssa_copy_prop
%%
Performs copy propagation on the SSA form on the Icode %% level.
%% %%
icode_ssa_const_prop
%%
Performs sparse conditional constant propagation on the SSA %% form on the Icode level.
%% %%
icode_ssa_struct_reuse
%%
Tries to factor out identical tuple and list constructions %% on the Icode level.
%% %%
icode_type
%%
Simplifies the code by employing type analysis and propagation %% on the Icode level.
%% %%
icode_range
%%
Performs integer range analysis on the Icode level.
%% %%
pp_all
%%
Equivalent to [pp_beam, pp_icode, pp_rtl, %% pp_native].
%% %%
pp_asm
%%
Prints the assembly listing with addresses and bytecode. %% Currently available for x86 only.
%% %%
pp_beam, {pp_beam, {file, File}}
%%
Display the input Beam code to stdout or file.
%% %%
pp_icode, {pp_icode, {file, File}}, %% {pp_icode, {only, Functions}}
%%
Pretty-print Icode intermediate code to stdout or file.
%% %%
pp_native, {pp_native, {file, File}}, %% {pp_native, {only, Functions}}
%%
Pretty-print native code to stdout or file.
%% %%
pp_opt_icode, {pp_opt_icode, {file, File}}, %% {pp_opt_icode, {only, Functions}}
%%
Pretty-print optimized Icode to stdout or file.
%% %%
pp_rtl, {pp_rtl, {file, File}}, %% {pp_rtl, {only, Functions}}
%%
Pretty-print RTL intermediate code to stdout or file.
%% %%
regalloc
%%
Select register allocation algorithm. Used as %% {regalloc, Method}. %% %%

Method is one of the following: %%

%% %%
remove_comments
%%
Remove comments from intermediate code.
%% %%
rtl_ssa_const_prop
%%
Performs sparse conditional constant propagation on the SSA %% form on the RTL level.
%% %%
rtl_lcm
%%
Lazy Code Motion on RTL.
%% %%
rtl_ssapre
%%
Lazy Partial Redundancy Elimination on RTL (SSA level).
%% %%
use_indexing
%%
Use indexing for multiple-choice branch selection.
%% %%
use_callgraph
%%
Use a static call graph for determining the order in which %% the functions of a module should be compiled (in reversed %% topological sort order).
%%

%% %%

Debugging Options

%% (May require that some modules have been %% compiled with the DEBUG flag.) %%
%%
rtl_show_translation
%%
Prints each step in the translation from Icode to RTL
%%
%% %% @end %% ==================================================================== -module(hipe). -export([c/1, c/2, f/1, f/2, compile/1, compile/2, compile/4, compile_core/4, file/1, file/2, get_llvm_version/0, llvm_support_available/0, load/1, help/0, help_hiper/0, help_options/0, help_option/1, help_debug_options/0, version/0, erts_checksum/0]). -ifndef(DEBUG). -define(DEBUG,true). -endif. -include("hipe.hrl"). -include("../../compiler/src/beam_disasm.hrl"). -include("../rtl/hipe_literals.hrl"). %%------------------------------------------------------------------- %% Basic type declaration for exported functions of the 'hipe' module %%------------------------------------------------------------------- -type mod() :: atom(). -type f_unit() :: mod() | binary(). -type ret_rtl() :: [_]. -type c_ret() :: {'ok', mod()} | {'error', term()} | {'ok', mod(), ret_rtl()}. %% The last for debugging only -type compile_file() :: atom() | string() | binary(). -type compile_ret() :: {hipe_architecture(), binary()} | list(). %%------------------------------------------------------------------- -define(COMPILE_DEFAULTS, [o2]). -define(DEFAULT_TIMEOUT, infinity). %%------------------------------------------------------------------- %% @spec load(Mod) -> {module, Mod} | {error, Reason} %% Mod = mod() %% Reason = term() %% %% @doc Like load/2, but tries to locate a BEAM file automatically. %% %% @see load/2 -spec load(Mod) -> {'module', Mod} | {'error', term()} when Mod :: mod(). load(Mod) -> load(Mod, beam_file(Mod)). %% @spec load(Mod, BeamFileName) -> {module, Mod} | {error, Reason} %% Mod = mod() %% Reason = term() %% BeamFileName = string() %% filename() = term() %% %% @type mod() = atom(). A module name. %% %% @doc User interface for loading code into memory. The code can be %% given as a native code binary or as the file name of a BEAM file %% which should contain a native-code chunk. If only the module name is %% given (see load/1), the BEAM file is located %% automatically. %% %% @see load/1 -spec load(Mod, string()) -> {'module', Mod} | {'error', term()} when Mod :: mod(). load(Mod, BeamFileName) when is_list(BeamFileName) -> Architecture = erlang:system_info(hipe_architecture), ChunkName = hipe_unified_loader:chunk_name(Architecture), case beam_lib:chunks(BeamFileName, [ChunkName]) of {ok,{_,[{_,Bin}]}} when is_binary(Bin) -> do_load(Mod, Bin, BeamFileName); Error -> {error, Error} end. %% @spec c(Name) -> {ok, Name} | {error, Reason} %% Name = mod() %% Reason = term() %% %% @equiv c(Name, []) -spec c(mod()) -> c_ret(). c(Name) -> c(Name, []). %% @spec c(Name, options()) -> {ok, Name} | {error, Reason} %% Name = mod() %% options() = [option()] %% option() = term() %% Reason = term() %% %% @type fun() = atom(). A function identifier. %% %% @type arity() = integer(). A function arity; always nonnegative. %% %% @doc User-friendly native code compiler interface. Reads BEAM code %% from the corresponding "Module.beam" file in the %% system path, and compiles the whole module to native code. By %% default, the compiled code is loaded directly. See above for %% documentation of options. %% %% @see c/1 %% @see c/3 %% @see f/2 %% @see compile/2 -spec c(mod(), comp_options()) -> c_ret(). c(Name, Options) -> c(Name, beam_file(Name), Options). %% @spec c(Name, File, options()) -> {ok, Name} | {error, Reason} %% Name = mod() %% File = filename() | binary() %% Reason = term() %% %% @doc Like c/2, but reads BEAM code from the specified %% File. %% %% @see c/2 %% @see f/2 c(Name, File, Opts) -> Opts1 = user_compile_opts(Opts), case compile(Name, File, Opts1) of {ok, Res} -> case proplists:get_bool(to_rtl, Opts1) of true -> {ok, Name, Res}; false -> {ok, Name} end; Other -> Other end. %% @spec f(File) -> {ok, Name} | {error, Reason} %% File = filename() | binary() %% Name = mod() %% Reason = term() %% %% @equiv f(File, []) -spec f(f_unit()) -> {'ok', mod()} | {'error', term()}. f(File) -> f(File, []). %% @spec f(File, options()) -> {ok, Name} | {error, Reason} %% File = filename() | binary() %% Name = mod() %% Reason = term() %% %% @doc Like c/3, but takes the module name from the %% specified File. %% %% @see c/3 -spec f(f_unit(), comp_options()) -> {'ok', mod()} | {'error', term()}. f(File, Opts) -> case file(File, user_compile_opts(Opts)) of {ok, Name, _} -> {ok, Name}; Other -> Other end. -define(USER_DEFAULTS, [load]). user_compile_opts(Opts) -> Opts ++ ?USER_DEFAULTS. %% @spec compile(Name) -> {ok, {Target,Binary}} | {error, Reason} %% Name = mod() %% Binary = binary() %% Reason = term() %% %% @equiv compile(Name, []) -spec compile(mod()) -> {'ok', compile_ret()} | {'error', term()}. compile(Name) -> compile(Name, []). %% @spec compile(Name, options()) -> {ok, {Target,Binary}} | {error, Reason} %% Name = mod() %% Binary = binary() %% Reason = term() %% %% @doc Direct compiler interface, for advanced use. This just %% compiles the module, reading BEAM code from the corresponding %% "Module.beam" file in the system path. Returns %% {ok, Binary} if successful, or {error, %% Reason} otherwise. By default, it does not load the %% binary to memory (the load option can be used to %% activate automatic loading). File can be either a file %% name or a binary containing the BEAM code for the module. %% %% @see c/2 %% @see compile/1 %% @see compile/3 %% @see file/2 %% @see load/2 -spec compile(mod(), comp_options()) -> {'ok', compile_ret()} | {'error', _}. compile(Name, Options) -> compile(Name, beam_file(Name), Options). -spec beam_file(mod()) -> string(). beam_file(Module) when is_atom(Module) -> case code:which(Module) of non_existing -> ?error_msg("Cannot find ~w.beam file.",[Module]), ?EXIT({cant_find_beam_file,Module}); File -> % string() File end. %% @spec compile(Name, File, options()) -> %% {ok, {Target, Binary}} | {error, Reason} %% Name = mod() %% File = filename() | binary() %% Binary = binary() %% Reason = term() %% %% @doc Like compile/2, but reads BEAM code from the %% specified File. %% %% @see compile/2 -spec compile(mod(), compile_file(), comp_options()) -> {'ok', compile_ret()} | {'error', term()}. compile(Name, File, Opts0) when is_atom(Name) -> Opts = expand_kt2(Opts0), case proplists:get_value(core, Opts) of true when is_binary(File) -> ?error_msg("Cannot get Core Erlang code from BEAM binary.",[]), ?EXIT({cant_compile_core_from_binary}); true -> case filename:find_src(filename:rootname(File, ".beam")) of {error, _} -> ?error_msg("Cannot find source code for ~p.", [File]), ?EXIT({cant_find_source_code}); {Source, CompOpts} -> CoreOpts = [X || X = {core_transform, _} <- Opts], %% io:format("Using: ~w\n", [CoreOpts]), case compile:file(Source, CoreOpts ++ [to_core, binary|CompOpts]) of {ok, _, Core} -> compile_core(Name, Core, File, Opts); Error -> ?error_msg("Error compiling ~p:\n~p.", [File, Error]), ?EXIT({cant_compile_source_code}) end end; {src_file, Source} -> CoreOpts1 = [X || X = {core_transform, _} <- Opts], CoreOpts2 = [report_errors, to_core, binary, {i,"../include"}|CoreOpts1], %% io:format("Using: ~w\n", [CoreOpts2]), case compile:file(Source, CoreOpts2) of {ok, _, Core} -> compile_core(Name, Core, File, Opts); Error -> ?error_msg("Error compiling ~p:\n~p\n", [Source, Error]), ?EXIT({cant_compile_source_code, Error}) end; Other when Other =:= false; Other =:= undefined -> DisasmFun = fun (_) -> disasm(File) end, IcodeFun = fun (Code, Opts_) -> get_beam_icode(Name, Code, File, Opts_) end, run_compiler(Name, DisasmFun, IcodeFun, Opts) end. -spec compile_core(mod(), cerl:c_module(), compile_file(), comp_options()) -> {'ok', compile_ret()} | {'error', term()}. compile_core(Name, Core0, File, Opts) -> Core = cerl:from_records(Core0), compile(Name, Core, File, Opts). %% @spec compile(Name, Core, File, options()) -> %% {ok, {Target, Binary}} | {error, Reason} %% Name = mod() %% Core = coreErlang() | [] %% File = filename() | binary() %% Binary = binary() %% Reason = term() %% %% @doc Like compile/3, but unless Core is %% [], low-level code is generated from the given Core %% Erlang code instead of from the BEAM code. %% %%

Note that only whole modules can be compiled with this %% function.

%% %% @see compile/3 -spec compile(mod(), cerl:c_module() | [], compile_file(), comp_options()) -> {'ok', compile_ret()} | {'error', term()}. compile(Name, [], File, Opts) -> compile(Name, File, Opts); compile(Name, Core, File, Opts) when is_atom(Name) -> DisasmFun = fun (_) -> {false, []} end, IcodeFun = fun (_, Opts) -> get_core_icode(Name, Core, File, Opts) end, run_compiler(Name, DisasmFun, IcodeFun, Opts). %% @spec file(File) -> {ok, Name, {Target, Binary}} | {error, Reason} %% File = filename() | binary() %% Name = mod() | mfa() %% Binary = binary() %% Reason = term() %% %% @equiv file(File, []) -spec file(Mod) -> {'ok', Mod, compile_ret()} | {'error', term()} when Mod :: mod(). file(File) -> file(File, []). %% @spec file(File, options()) -> {ok, Name, {Target,Binary}} | {error, Reason} %% File = filename() %% Name = mod() | mfa() %% Binary = binary() %% Reason = term() %% %% @doc Like compile/2, but takes the module name from the %% specified File. Returns both the name and the final %% binary if successful. %% %% @see file/1 %% @see compile/2 -spec file(Mod, comp_options()) -> {'ok', Mod, compile_ret()} | {'error', term()} when Mod :: mod(). file(File, Options) when is_atom(File) -> case beam_lib:info(File) of L when is_list(L) -> {module, Mod} = lists:keyfind(module, 1, L), case compile(Mod, File, Options) of {ok, CompRet} -> {ok, Mod, CompRet}; Other -> Other end; Error -> Error end. %%----------------------------------------------------------------------- %% The rest are internal functions: %%----------------------------------------------------------------------- %% @doc %% Get BEAM code from `.beam' files or directly from binaries. %% File is either a file name or a binary containing the BEAM code. disasm(File) -> case beam_disasm:file(File) of #beam_file{labeled_exports = LabeledExports, compile_info = CompInfo, code = BeamCode} -> CompOpts = proplists:get_value(options, CompInfo, []), HCompOpts = case lists:keyfind(hipe, 1, CompOpts) of {hipe, L} when is_list(L) -> L; {hipe, X} -> [X]; _ -> [] end, Exports = fix_beam_exports(LabeledExports), {{BeamCode, Exports}, HCompOpts}; {error, _Mod, Error} -> io:format("~s\n", [beam_lib:format_error(Error)]), ?EXIT(no_beam_code) end. fix_beam_exports(BeamExports) -> fix_beam_exports(BeamExports, []). fix_beam_exports([{F,A,_}|BeamExports], Exports) -> fix_beam_exports(BeamExports, [{F,A} | Exports]); fix_beam_exports([], Exports) -> Exports. get_beam_icode(Mod, {BeamCode, Exports}, File, Options) -> {ok, Icode} = ?option_time((catch {ok, hipe_beam_to_icode:module(BeamCode, Options)}), "BEAM-to-Icode", Options), BeamBin = get_beam_code(File), {{Mod, Exports, Icode}, BeamBin}. get_core_icode(Mod, Core, File, Options) -> {ok, Icode} = ?option_time((catch {ok, cerl_to_icode:module(Core, Options)}), "BEAM-to-Icode", Options), NeedBeamCode = not proplists:get_bool(load, Options), BeamBin = case NeedBeamCode of true -> []; false -> get_beam_code(File) end, Exports = [cerl:var_name(V) || V <- cerl:module_exports(Core)], {{Mod, Exports, Icode}, BeamBin}. get_beam_code(Bin) when is_binary(Bin) -> Bin; get_beam_code(FileName) -> case erl_prim_loader:get_file(FileName) of {ok, Bin, _} -> Bin; error -> ?EXIT(no_beam_file) end. %% --------------------------------------------------------------------- %% All compilations go through this function. Note that it receives only %% "basic" options. Name is just used for verbosity. The DisasmFun and %% IcodeFun only collect the Icode; most of the real work is done in the %% 'finalize' function. run_compiler(Name, DisasmFun, IcodeFun, Opts0) -> Opts = expand_basic_options(Opts0 ++ ?COMPILE_DEFAULTS), ?when_option(verbose, Opts, ?debug_msg("Compiling: ~p\n",[Name])), ?option_start_time("Compile", Opts), Res = run_compiler_1(DisasmFun, IcodeFun, Opts), ?option_stop_time("Compile", Opts), Res. run_compiler_1(DisasmFun, IcodeFun, Options) -> Parent = self(), {trap_exit,TrapExit} = process_info(Parent, trap_exit), %% Spawn a compilation process CompProc. In case this process gets %% killed, the trap_exit flag is restored to that of the Parent process. process_flag(trap_exit, true), CompProc = spawn_link(fun () -> %% Compiler process set_architecture(Options), pre_init(Options), %% The full option expansion is not done %% until the DisasmFun returns. {Code, CompOpts} = DisasmFun(Options), Opts0 = expand_options(Options ++ CompOpts, get(hipe_target_arch)), Opts = case proplists:get_bool(to_llvm, Opts0) andalso not llvm_support_available() of true -> ?error_msg("No LLVM version 3.4 or greater " "found in $PATH; aborting " "native code compilation.\n", []), ?EXIT(cant_find_required_llvm_version); false -> Opts0 end, check_options(Opts), ?when_option(verbose, Options, ?debug_msg("Options: ~p.\n",[Opts])), init(Opts), {Icode, WholeModule} = IcodeFun(Code, Opts), CompRes = compile_finish(Icode, WholeModule, Opts), compiler_return(CompRes, Parent) end), Timeout = case proplists:get_value(timeout, Options) of N when is_integer(N), N >= 0 -> N; undefined -> ?DEFAULT_TIMEOUT; infinity -> infinity; Other -> ?WARNING_MSG("Bad timeout value: ~P\n" "Using default timeout limit.\n", [Other, 5]), ?DEFAULT_TIMEOUT end, receive {'EXIT', CompProc, normal} -> ok; {'EXIT', CompProc, Reason} -> exit(Reason) after Timeout -> %% Kill the compilation process exit(CompProc, kill), receive {'EXIT', CompProc, _} -> ok end, flush(), ?error_msg("ERROR: Compilation timed out.\n",[]), exit(timed_out) end, Result = receive {CompProc, Res} -> Res end, process_flag(trap_exit, TrapExit), Result. flush() -> receive _ -> flush() after 0 -> ok end. compiler_return(Res, Client) -> Client ! {self(), Res}. compile_finish({Mod, Exports, Icode}, WholeModule, Options) -> Res = finalize(Icode, Mod, Exports, WholeModule, Options), post(Res, Icode, Options). %% ------------------------------------------------------------------------- %% finalize/5 %% compiles, assembles, and optionally loads a list of `{MFA, Icode}' pairs, %% and returns `{ok, {TargetArch, Binary}}' or `{error, Reason, Stack}'. finalize(OrigList, Mod, Exports, WholeModule, Opts) -> List = icode_multret(OrigList, Mod, Opts, Exports), {T1Compile,_} = erlang:statistics(runtime), CompiledCode = case proplists:get_value(use_callgraph, Opts) of true -> %% Compiling the functions bottom-up by using a call graph CallGraph = hipe_icode_callgraph:construct(List), OrdList = hipe_icode_callgraph:to_list(CallGraph), finalize_fun(OrdList, Exports, Opts); _ -> %% Compiling the functions bottom-up by reversing the list OrdList = lists:reverse(List), finalize_fun(OrdList, Exports, Opts) end, {T2Compile,_} = erlang:statistics(runtime), ?when_option(verbose, Opts, ?debug_msg("Compiled ~p in ~.2f s\n", [Mod,(T2Compile-T1Compile)/1000])), case proplists:get_bool(to_rtl, Opts) of true -> {ok, CompiledCode}; false -> Closures = [MFA || {MFA, Icode} <- List, hipe_icode:icode_is_closure(Icode)], {T1,_} = erlang:statistics(runtime), ?when_option(verbose, Opts, ?debug_msg("Assembling ~w",[Mod])), try assemble(CompiledCode, Closures, Exports, Opts) of Bin -> {T2,_} = erlang:statistics(runtime), ?when_option(verbose, Opts, ?debug_untagged_msg(" in ~.2f s\n", [(T2-T1)/1000])), {module,Mod} = maybe_load(Mod, Bin, WholeModule, Opts), TargetArch = get(hipe_target_arch), {ok, {TargetArch,Bin}} catch error:Error -> {error,Error,erlang:get_stacktrace()} end end. finalize_fun(MfaIcodeList, Exports, Opts) -> case proplists:get_value(concurrent_comp, Opts) of FalseVal when (FalseVal =:= undefined) orelse (FalseVal =:= false) -> NoServers = #comp_servers{pp_server = none, range = none, type = none}, [finalize_fun_sequential(MFAIcode, Opts, NoServers) || {_MFA, _Icode} = MFAIcode <- MfaIcodeList]; TrueVal when (TrueVal =:= true) orelse (TrueVal =:= debug) -> finalize_fun_concurrent(MfaIcodeList, Exports, Opts) end. finalize_fun_concurrent(MfaIcodeList, Exports, Opts) -> Self = self(), case MfaIcodeList of [{{M,_,_},_}|_] -> CallGraph = hipe_icode_callgraph:construct_callgraph(MfaIcodeList), Exported = [{M, F, A} || {F, A} <- Exports], Closures = [MFA || {MFA, Icode} <- MfaIcodeList, hipe_icode:icode_is_closure(Icode)], %% In principle, a function could both be exported and used as a %% closure so make sure to add it only once in Escaping below Escaping = ordsets:from_list(Exported ++ Closures), NonEscaping = [MFA || {{_M, F, A} = MFA, Icode} <- MfaIcodeList, not lists:member({F, A}, Exports), not hipe_icode:icode_is_closure(Icode)], TypeServerFun = fun() -> hipe_icode_coordinator:coordinate(CallGraph, Escaping, NonEscaping, hipe_icode_type) end, TypeServer = spawn_link(TypeServerFun), PPServerFun = fun() -> pp_server_start(Opts) end, PPServer = spawn_link(PPServerFun), RangeServerFun = fun() -> hipe_icode_coordinator:coordinate(CallGraph, Escaping, NonEscaping, hipe_icode_range) end, RangeServer = spawn_link(RangeServerFun), Servers = #comp_servers{pp_server = PPServer, range = RangeServer, type = TypeServer}, CompFuns = [fun() -> set_architecture(Opts), pre_init(Opts), init(Opts), Self ! finalize_fun_sequential(IcodeFun, Opts, Servers) end || IcodeFun <- MfaIcodeList], lists:foreach(fun (F) -> spawn_link(F) end, CompFuns), Final = [receive Res when element(1, Res) =:= MFA -> Res end || {MFA, _} <- MfaIcodeList], lists:foreach(fun (Pid) -> stop_and_wait(Pid) end, [PPServer, TypeServer, RangeServer]), Final; [] -> [] end. stop_and_wait(Pid) -> Pid ! {stop, self()}, receive _ -> ok end. finalize_fun_sequential({MFA, Icode}, Opts, Servers) -> {T1, _} = erlang:statistics(runtime), ?when_option(verbose, Opts, ?debug_msg("Compiling ~w~n", [MFA])), try hipe_main:compile_icode(MFA, Icode, Opts, Servers) of {native, _Platform, {unprofiled, Code}} -> {T2, _} = erlang:statistics(runtime), ?when_option(verbose, Opts, ?debug_msg("Compiled ~w in ~.2f s\n", [MFA,(T2-T1)/1000])), {MFA, Code}; {rtl, LinearRtl} -> {MFA, LinearRtl}; {llvm_binary, Binary} -> {MFA, Binary} catch error:Error -> ?when_option(verbose, Opts, ?debug_untagged_msg("\n", [])), ErrorInfo = {Error, erlang:get_stacktrace()}, ?error_msg("ERROR: ~p~n", [ErrorInfo]), ?EXIT(ErrorInfo) end. pp_server_start(Opts) -> set_architecture(Opts), garbage_collect(), pp_server(). pp_server() -> receive {print, Fun} -> Fun(), pp_server(); {stop, Pid} -> Pid ! {done, self()}; _ -> pp_server() end. icode_multret(List, Mod, Opts, Exports) -> case proplists:get_bool(icode_multret, Opts) of true -> hipe_icode_mulret:mult_ret(List, Mod, Opts, Exports); false -> List end. maybe_load(Mod, Bin, WholeModule, Opts) -> case proplists:get_bool(load, Opts) of false -> {module, Mod}; true -> ?when_option(verbose, Opts, ?debug_msg("Loading/linking\n", [])), do_load(Mod, Bin, WholeModule) end. do_load(Mod, Bin, BeamBinOrPath) when is_binary(BeamBinOrPath); is_list(BeamBinOrPath) -> HostArch = get(hipe_host_arch), TargetArch = get(hipe_target_arch), %% Make sure we can do the load. if HostArch =/= TargetArch -> ?EXIT({host_and_target_arch_differ, HostArch, TargetArch}); true -> ok end, case code:is_sticky(Mod) of true -> %% We unpack and repack the Beam binary as a workaround to %% ensure that it is not compressed. {ok, _, Chunks} = beam_lib:all_chunks(BeamBinOrPath), {ok, Beam} = beam_lib:build_module(Chunks), %% Don't purge or register sticky mods; just load native. code:load_native_sticky(Mod, Bin, Beam); false -> %% Normal loading of a whole module ChunkName = hipe_unified_loader:chunk_name(HostArch), {ok, _, Chunks0} = beam_lib:all_chunks(BeamBinOrPath), Chunks = [{ChunkName, Bin}|lists:keydelete(ChunkName, 1, Chunks0)], {ok, BeamPlusNative} = beam_lib:build_module(Chunks), code:load_binary(Mod, code:which(Mod), BeamPlusNative) end. assemble(CompiledCode, Closures, Exports, Options) -> case proplists:get_bool(to_llvm, Options) of false -> case get(hipe_target_arch) of ultrasparc -> hipe_sparc_assemble:assemble(CompiledCode, Closures, Exports, Options); powerpc -> hipe_ppc_assemble:assemble(CompiledCode, Closures, Exports, Options); ppc64 -> hipe_ppc_assemble:assemble(CompiledCode, Closures, Exports, Options); arm -> hipe_arm_assemble:assemble(CompiledCode, Closures, Exports, Options); x86 -> hipe_x86_assemble:assemble(CompiledCode, Closures, Exports, Options); amd64 -> hipe_amd64_assemble:assemble(CompiledCode, Closures, Exports, Options); Arch -> ?EXIT({executing_on_an_unsupported_architecture, Arch}) end; true -> %% Merge already compiled code (per MFA) to a single binary. hipe_llvm_merge:finalize(CompiledCode, Closures, Exports) end. %% -------------------------------------------------------------------- %% Initialise host and target architectures. Target defaults to host, %% but can be overridden by passing an option {target, Target}. set_architecture(Options) -> HostArch = erlang:system_info(hipe_architecture), put(hipe_host_arch, HostArch), put(hipe_target_arch, proplists:get_value(target, Options, HostArch)), ok. %% This sets up some globally accessed stuff that are needed by the %% compiler process before it even gets the full list of options. %% Therefore, this expands the current set of options for local use. pre_init(Opts) -> Options = expand_options(Opts, get(hipe_target_arch)), %% Initialise some counters used for measurements and benchmarking. If %% the option 'measure_regalloc' is given the compilation will return %% a keylist with the counter values. put(hipe_time, case proplists:get_value(time, Options, false) of true -> [hipe, hipe_main]; OptTime -> OptTime end), lists:foreach(fun (T) -> ?set_hipe_timer_val(T, 0) end, hipe_timers()), lists:foreach(fun (Counter) -> case Counter of {CounterName, InitVal} -> put(CounterName, InitVal); CounterName -> put(CounterName, 0) end end, proplists:get_value(counters, Options, [])), put(hipe_debug, proplists:get_bool(debug, Options)), put(hipe_inline_fp, proplists:get_bool(inline_fp, Options)), ok. %% Prepare the compiler process by setting up variables which are %% accessed globally. Options have been fully expanded at ths point. init(_Options) -> put(callersavetime, 0), put(totalspill, {0,0}), put(spilledtemps, 0), put(pre_ra_instrs, 0), put(post_ra_instrs, 0), put(pre_ra_temps, 0), put(post_ra_temps, 0), put(noregs, 0), put(bbs, 0), ok. %% -------------------------------------------------------------------- post(Res, Icode, Options) -> TimerVals = case proplists:get_value(timers, Options) of Timers when is_list(Timers) -> [{Timer, ?get_hipe_timer_val(Timer)} || Timer <- Timers]; _ -> [] end, CounterVals = case proplists:get_value(counters, Options) of Counters when is_list(Counters) -> [case Counter of {CounterName, _InitVal} -> {CounterName, get(CounterName)}; CounterName -> {CounterName, get(CounterName)} end || Counter <- Counters]; _ -> [] end, Measures = case proplists:get_bool(measure_regalloc, Options) of true -> get(); % return whole process dictionary list (simplest way...) false -> [] end, Info = TimerVals ++ CounterVals ++ Measures, case proplists:get_bool(get_called_modules, Options) of true -> CalledMods = hipe_icode_callgraph:get_called_modules(Icode), case Info of [] -> {Res, {called_modules, CalledMods}}; _ -> {Res, {info, Info}, {called_modules, CalledMods}} end; false -> case Info of [] -> Res; _ -> {Res, {info, Info}} end end. %% -------------------------------------------------------------------- %% @doc Returns the current HiPE version as a string(). -spec version() -> nonempty_string(). version() -> ?VERSION_STRING(). %% @doc Returns checksum identifying the target runtime system. -spec erts_checksum() -> integer(). erts_checksum() -> ?HIPE_ERTS_CHECKSUM. %% -------------------------------------------------------------------- %% D O C U M E N T A T I O N - H E L P %% -------------------------------------------------------------------- %% @doc Prints on-line documentation to the standard output. -spec help() -> 'ok'. help() -> M = "The HiPE Compiler (Version " ++ ?VERSION_STRING() ++ ")\n" ++ "\n" ++ " The normal way to native-compile Erlang code using HiPE is to\n" ++ " include `native' in the Erlang compiler options, as in:\n" ++ " 1> c(my_module, [native]).\n" ++ " Options to the HiPE compiler must then be passed as follows:\n" ++ " 1> c(my_module, [native,{hipe,Options}]).\n" ++ " Use `help_options()' for details.\n" ++ "\n" ++ " Utility functions:\n" ++ " help()\n" ++ " Prints this message.\n" ++ " help_options()\n" ++ " Prints a description of options recognized by the\n" ++ " HiPE compiler.\n" ++ " help_option(Option)\n" ++ " Prints a description of that option.\n" ++ " help_debug_options()\n" ++ " Prints a description of debug options.\n" ++ " version() ->\n" ++ " Returns the HiPE version as a string'.\n" ++ " erts_checksum() ->\n" ++ " Returns a checksum identifying the target runtime system.\n" ++ "\n" ++ " For HiPE developers only:\n" ++ " Use `help_hiper()' for information about HiPE's low-level interface\n", io:put_chars(M), ok. -spec help_hiper() -> 'ok'. help_hiper() -> M = " This interface is supposed to be used by HiPE-developers only!\n" ++ " Note that all options are specific to the HiPE compiler.\n" ++ " c(Name,Options)\n" ++ " Compiles the module or function Name and loads it\n" ++ " to memory. Name is an atom or a tuple {M,F,A}.\n" ++ " c(Name)\n" ++ " As above, but using only default options.\n" ++ " f(File,Options)\n" ++ " As c(Name,File,Options), but taking the module name\n" ++ " from File.\n" ++ " f(File)\n" ++ " As above, but using only default options.\n" ++ " compile(Name,Options)\n" ++ " Compiles the module or function Name to a binary.\n" ++ " By default, this does not load to memory.\n" ++ " compile(Name)\n" ++ " As above, but using only default options.\n" ++ " file(File,Options)\n" ++ " As compile(Name,File,Options), but taking the\n" ++ " module name from File.\n" ++ " file(File)\n" ++ " As above, but using only default options.\n" ++ " load(Module)\n" ++ " Loads the named module into memory.\n", io:put_chars(M), ok. %% TODO: it should be possible to specify the target somehow when asking %% for available options. Right now, you only see host machine options. %% @doc Prints documentation about options to the standard output. -spec help_options() -> 'ok'. help_options() -> HostArch = erlang:system_info(hipe_architecture), O0 = expand_options([o0] ++ ?COMPILE_DEFAULTS, HostArch), O1 = expand_options([o1] ++ ?COMPILE_DEFAULTS, HostArch), O2 = expand_options([o2] ++ ?COMPILE_DEFAULTS, HostArch), O3 = expand_options([o3] ++ ?COMPILE_DEFAULTS, HostArch), io:format("HiPE Compiler Options\n" ++ " Boolean-valued options generally have corresponding " ++ "aliases `no_...',\n" ++ " and can also be specified as `{Option, true}' " ++ "or `{Option, false}.\n\n" ++ " General boolean options:\n" ++ " ~p.\n\n" ++ " Non-boolean options:\n" ++ " o#, where 0 =< # =< 3:\n" ++ " Select optimization level (the default is 2).\n\n" ++ " Further options can be found below; " ++ "use `hipe:help_option(Name)' for details.\n\n" ++ " Aliases:\n" ++ " pp_all = ~p,\n" ++ " pp_sparc = pp_native,\n" ++ " pp_x86 = pp_native,\n" ++ " pp_amd64 = pp_native,\n" ++ " pp_ppc = pp_native,\n" ++ " o0 = ~p,\n" ++ " o1 = ~p ++ o0,\n" ++ " o2 = ~p ++ o1,\n" ++ " o3 = ~p ++ o2.\n", [ordsets:from_list([verbose, debug, time, load, pp_beam, pp_icode, pp_rtl, pp_native, pp_asm, timeout]), expand_options([pp_all], HostArch), O0 -- [o0], (O1 -- O0) -- [o1], (O2 -- O1) -- [o2], (O3 -- O2) -- [o3]]), ok. %% Documentation of the individual options. %% If you add an option, please add help-text here. -spec option_text(atom()) -> string(). option_text('O') -> "Specify optimization level. Used as o1, o2, o3.\n" ++ " At the moment levels 0 - 3 are implemented.\n" ++ " Aliases: 'O1', 'O2', O3'."; option_text(caller_save_spill_restore) -> "Activates caller save register spills and restores"; option_text(debug) -> "Outputs internal debugging information during compilation"; option_text(icode_call_elim) -> "Performs call elimination of BIFs that are side-effect free\n" ++ "only on some argument types"; option_text(icode_range) -> "Performs integer range analysis on the Icode level"; option_text(icode_ssa_check) -> "Checks whether Icode is on SSA form or not"; option_text(icode_ssa_copy_prop) -> "Performs copy propagation on Icode SSA"; option_text(icode_ssa_const_prop) -> "Performs sparse conditional constant propagation on Icode SSA"; option_text(icode_ssa_struct_reuse) -> "Factors out common tuple and list constructions on Icode SSA"; option_text(icode_type) -> "Performs type analysis on the Icode level\n" ++ "and then simplifies the code based on the results of this analysis"; option_text(load) -> "Automatically load the produced native code into memory"; option_text(peephole) -> "Enables peephole optimizations"; option_text(pmatch) -> "Enables pattern matching compilation when compiling from Core;\n" ++ "has no effect when compiling from BEAM bytecode"; option_text(pp_asm) -> "Displays assembly listing with addresses and bytecode\n" ++ "Currently available for x86 only"; option_text(pp_beam) -> "Display the input BEAM code"; option_text(pp_icode) -> "Display the intermediate HiPE-ICode"; option_text(pp_rtl) -> "Display the intermediate HiPE-RTL code"; option_text(pp_rtl_lcm) -> "Display the intermediate HiPE-RTL lazy code motion sets"; option_text(pp_rtl_ssapre) -> "Display the intermediate HiPE-RTL A-SSAPRE sets"; option_text(pp_native) -> "Display the generated (back-end specific) native code"; option_text(regalloc) -> "Select register allocation algorithm. Used as {regalloc, METHOD}.\n" ++ " Currently available methods:\n" ++ " naive - spills everything (for debugging and testing)\n" ++ " linear_scan - fast; not so good if few registers available\n" ++ " graph_color - slow, but gives OK performance\n" ++ " coalescing - slower, tries hard to use registers\n" ++ " optimistic - another variant of a coalescing allocator"; option_text(remove_comments) -> "Strip comments from intermediate code"; option_text(rtl_ssa) -> "Perform SSA conversion on the RTL level -- default starting at O2"; option_text(rtl_ssa_const_prop) -> "Performs sparse conditional constant propagation on RTL SSA"; option_text(rtl_lcm) -> "Perform Lazy Code Motion on RTL"; option_text(rtl_ssapre) -> "Perform A-SSAPRE on RTL"; option_text(time) -> "Reports the compilation times for the different stages\n" ++ "of the compiler.\n" ++ " {time, Module} reports timings for the module Module.\n" ++ " {time, [M1, M2, M3]} reports timings for the specified modules.\n" ++ " {time, all} reports timings all modules.\n" ++ " time reports timings for the main module.\n"; option_text(timeout) -> "Specify compilation time limit in ms. Used as {timeout, LIMIT}.\n" ++ " The limit must be a non-negative integer or the atom 'infinity'.\n" ++ " The current default limit is 15 minutes (900000 ms)."; option_text(use_indexing) -> "Use indexing for multiple-choice branch selection"; option_text(use_callgraph) -> "Compile the functions in a module according to a reversed topological\n" ++ "sorted order to gain more information when using a persistent lookup\n" ++ "table for storing intra-modular type information"; option_text(verbose) -> "Output information about what is being done"; option_text(Opt) when is_atom(Opt) -> "". %% @doc Prints documentation about a specific option to the standard output. -spec help_option(comp_option()) -> 'ok'. help_option(Opt) -> HostArch = erlang:system_info(hipe_architecture), case expand_options([Opt], HostArch) of [Opt] -> Name = if is_atom(Opt) -> Opt; tuple_size(Opt) =:= 2 -> element(1, Opt) end, case option_text(Name) of "" -> case lists:member(Name, opt_keys()) of true -> io:format("~w - Sorry, this option is not documented yet.\n", [Name]); _ -> io:format("Unknown option ~p.\n", [Name]) end; Txt -> io:fwrite("~w - ~s\n", [Name, Txt]) end; Opts -> io:fwrite("This is an alias for: ~p.\n", [Opts]) end, ok. %% @doc Prints documentation about debugging options to the standard %% output. -spec help_debug_options() -> 'ok'. help_debug_options() -> io:format("HiPE compiler debug options:\n" ++ " Might require that some modules have been compiled " ++ "with the debug flag.\n" ++ " rtl_show_translation - Prints each step in the\n" ++ " translation from Icode to RTL\n", []), ok. hipe_timers() -> [time_ra]. %% ____________________________________________________________________ %% %% Option expansion %% These are currently in use, but not documented: %% %% count_instrs: %% icode_type: %% icode_range: %% {ls_order, Order}: %% {regalloc, Algorithm}: %% remove_comments %% timeregalloc: %% timers %% use_indexing %% Valid option keys. (Don't list aliases or negations - the check is %% done after the options have been expanded to normal form.) opt_keys() -> [ binary_opt, bitlevel_binaries, caller_save_spill_restore, concurrent_comp, core, core_transform, counters, count_instrs, count_spills, count_temps, debug, get_called_modules, split_arith, split_arith_unsafe, icode_call_elim, icode_inline_bifs, icode_ssa_check, icode_ssa_copy_prop, icode_ssa_const_prop, icode_ssa_struct_reuse, icode_type, icode_range, icode_multret, inline_fp, ls_order, load, measure_regalloc, peephole, pmatch, pp_asm, pp_beam, pp_icode, pp_icode_ssa, pp_icode_split_arith, pp_opt_icode, pp_range_icode, pp_typed_icode, pp_icode_liveness, pp_native, pp_rtl, pp_rtl_liveness, pp_rtl_ssa, pp_rtl_lcm, pp_rtl_ssapre, pp_rtl_linear, regalloc, remove_comments, rtl_ssa, rtl_ssa_const_prop, rtl_lcm, rtl_ssapre, rtl_show_translation, spillmin_color, target, time, timeout, timeregalloc, timers, to_rtl, to_llvm, % Use the LLVM backend for compilation. llvm_save_temps, % Save the LLVM intermediate files in the current % directory; useful for debugging. llvm_llc, % Specify llc optimization-level: o1, o2, o3, undefined. llvm_opt, % Specify opt optimization-level: o1, o2, o3, undefined. use_indexing, use_inline_atom_search, use_callgraph, use_clusters, use_jumptable, verbose, %% verbose_spills, x87]. %% Definitions: o0_opts(_TargetArch) -> [concurrent_comp, {regalloc,linear_scan}]. o1_opts(TargetArch) -> Common = [inline_fp, pmatch, peephole, icode_ssa_const_prop, icode_ssa_copy_prop, icode_inline_bifs, rtl_ssa, rtl_ssa_const_prop, rtl_ssapre, spillmin_color, use_indexing, remove_comments, binary_opt, {regalloc,coalescing} | o0_opts(TargetArch)], case TargetArch of ultrasparc -> Common; powerpc -> Common; ppc64 -> Common; arm -> Common -- [inline_fp]; % Pointless optimising for absent hardware x86 -> [x87 | Common]; % XXX: Temporary until x86 has sse2 amd64 -> Common; Arch -> ?EXIT({executing_on_an_unsupported_architecture,Arch}) end. o2_opts(TargetArch) -> Common = [icode_type, icode_call_elim, % icode_ssa_struct_reuse, rtl_lcm | (o1_opts(TargetArch) -- [rtl_ssapre])], case TargetArch of T when T =:= amd64 orelse T =:= ppc64 -> % 64-bit targets [icode_range | Common]; _ -> % T \in [arm, powerpc, ultrasparc, x86] Common % [rtl_ssapre | Common]; end. o3_opts(TargetArch) -> %% no point checking for target architecture since this is checked in 'o1' [icode_range | o2_opts(TargetArch)]. %% Note that in general, the normal form for options should be positive. %% This is a good programming convention, so that tests in the code say %% "if 'x' ..." instead of "if not 'no_x' ...". opt_negations() -> [{no_binary_opt, binary_opt}, {no_bitlevel_binaries, bitlevel_binaries}, {no_core, core}, {no_debug, debug}, {no_get_called_modules, get_called_modules}, {no_split_arith, split_arith}, {no_concurrent_comp, concurrent_comp}, {no_icode_inline_bifs, icode_inline_bifs}, {no_icode_range, icode_range}, {no_icode_split_arith, icode_split_arith}, {no_icode_call_elim, icode_call_elim}, {no_icode_ssa_check, icode_ssa_check}, {no_icode_ssa_copy_prop, icode_ssa_copy_prop}, {no_icode_ssa_const_prop, icode_ssa_const_prop}, {no_icode_ssa_struct_reuse, icode_ssa_struct_reuse}, {no_icode_type, icode_type}, {no_inline_fp, inline_fp}, {no_load, load}, {no_peephole, peephole}, {no_pmatch, pmatch}, {no_pp_beam, pp_beam}, {no_pp_icode, pp_icode}, {no_pp_icode_ssa, pp_icode_ssa}, {no_pp_opt_icode, pp_opt_icode}, {no_pp_typed_icode, pp_typed_icode}, {no_pp_rtl, pp_rtl}, {no_pp_native, pp_native}, {no_pp_rtl_lcm, pp_rtl_lcm}, {no_pp_rtl_ssapre, pp_rtl_ssapre}, {no_remove_comments, remove_comments}, {no_rtl_ssa, rtl_ssa}, {no_rtl_ssa_const_prop, rtl_ssa_const_prop}, {no_rtl_lcm, rtl_lcm}, {no_rtl_ssapre, rtl_ssapre}, {no_rtl_show_translation, rtl_show_translation}, {no_time, time}, {no_use_callgraph, use_callgraph}, {no_use_clusters, use_clusters}, {no_use_inline_atom_search, use_inline_atom_search}, {no_use_indexing, use_indexing}]. %% Don't use negative forms in right-hand sides of aliases and expansions! %% We only expand negations once, before the other expansions are done. opt_aliases() -> [{'O0', o0}, {'O1', o1}, {'O2', o2}, {'O3', o3}, {pp_sparc, pp_native}, {pp_x86, pp_native}, {pp_amd64, pp_native}, {pp_ppc, pp_native}]. opt_basic_expansions() -> [{pp_all, [pp_beam, pp_icode, pp_rtl, pp_native]}]. opt_expansions(TargetArch) -> [{o0, o0_opts(TargetArch)}, {o1, o1_opts(TargetArch)}, {o2, o2_opts(TargetArch)}, {o3, o3_opts(TargetArch)}, {to_llvm, llvm_opts(o3, TargetArch)}, {{to_llvm, o0}, llvm_opts(o0, TargetArch)}, {{to_llvm, o1}, llvm_opts(o1, TargetArch)}, {{to_llvm, o2}, llvm_opts(o2, TargetArch)}, {{to_llvm, o3}, llvm_opts(o3, TargetArch)}, {x87, [x87, inline_fp]}, {inline_fp, case TargetArch of %% XXX: Temporary until x86 has sse2 x86 -> [x87, inline_fp]; _ -> [inline_fp] end}]. llvm_opts(O, TargetArch) -> Base = [to_llvm, {llvm_opt, O}, {llvm_llc, O}], case TargetArch of %% A llvm bug present in 3.4 through (at least) 3.8 miscompiles x86 %% functions that have floats are spilled to stack by clobbering the process %% pointer (ebp) trying to realign the stack pointer. x86 -> [no_inline_fp | Base]; _ -> Base end. %% This expands "basic" options, which may be tested early and cannot be %% in conflict with options found in the source code. -spec expand_basic_options(comp_options()) -> comp_options(). expand_basic_options(Opts) -> proplists:normalize(Opts, [{negations, opt_negations()}, {aliases, opt_aliases()}, {expand, opt_basic_expansions()}]). -spec expand_kt2(comp_options()) -> comp_options(). expand_kt2(Opts) -> proplists:normalize(Opts, [{expand, [{kt2_type, [{use_callgraph, fixpoint}, core, {core_transform, cerl_typean}]}]}]). %% Note that the given %% list should contain the total set of options, since things like 'o2' %% are expanded here. Basic expansions are processed here also, since %% this function is called from the help functions. -spec expand_options(comp_options(), hipe_architecture()) -> comp_options(). expand_options(Opts0, TargetArch) -> Opts1 = proplists:normalize(Opts0, [{aliases, opt_aliases()}]), Opts = normalise_opt_options(Opts1), proplists:normalize(Opts, [{negations, opt_negations()}, {expand, opt_basic_expansions()}, {expand, opt_expansions(TargetArch)}, {negations, opt_negations()}]). normalise_opt_options([o0|Opts]) -> [o0] ++ (Opts -- [o0, o1, o2, o3]); normalise_opt_options([o1|Opts]) -> [o1] ++ (Opts -- [o0, o1, o2, o3]); normalise_opt_options([o2|Opts]) -> [o2] ++ (Opts -- [o0, o1, o2, o3]); normalise_opt_options([o3|Opts]) -> [o3] ++ (Opts -- [o0, o1, o2, o3]); normalise_opt_options([O|Opts]) -> [O|normalise_opt_options(Opts)]; normalise_opt_options([]) -> []. -spec check_options(comp_options()) -> 'ok'. check_options(Opts) -> Keys = ordsets:from_list(opt_keys()), Used = ordsets:from_list(proplists:get_keys(Opts)), case ordsets:subtract(Used, Keys) of [] -> ok; L -> ?WARNING_MSG("Unknown options: ~p.\n", [L]), ok end. -spec llvm_support_available() -> boolean(). llvm_support_available() -> get_llvm_version() >= {3,4}. -type llvm_version() :: {Major :: integer(), Minor :: integer()}. -spec get_llvm_version() -> llvm_version() | {0, 0}. get_llvm_version() -> OptStr = os:cmd("opt -version"), SubStr = "LLVM version ", N = length(SubStr), case string:str(OptStr, SubStr) of 0 -> % No opt available {0, 0}; S -> case string:tokens(string:sub_string(OptStr, S + N), ".") of [MajorS, MinorS | _] -> case {string:to_integer(MajorS), string:to_integer(MinorS)} of {{Major, ""}, {Minor, _}} when is_integer(Major), is_integer(Minor) -> {Major, Minor}; _ -> {0, 0} end; _ -> {0, 0} %XXX: Assumes no revision numbers in versioning end end. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%