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%-----------------------------------------------------------------------------%
% Copyright (C) 1998-1999 University of Melbourne.
% This file may only be copied under the terms of the GNU General
% Public License - see the file COPYING in the Mercury distribution.
%-----------------------------------------------------------------------------%
% File: rl_opt.m
% Main author: stayl
%
% Call the RL optimization passes.
%-----------------------------------------------------------------------------%
:- module rl_opt.
:- interface.
:- import_module hlds_module, rl.
:- import_module io, list.
:- pred rl_opt__procs(module_info, list(rl_proc), list(rl_proc),
io__state, io__state).
:- mode rl_opt__procs(in, in, out, di, uo) is det.
%-----------------------------------------------------------------------------%
:- implementation.
:- import_module globals, options, passes_aux, prog_out.
:- import_module rl_block, rl_liveness.
:- import_module rl_block_opt, rl_loop, rl_sort, rl_stream.
:- import_module bool, list.
rl_opt__procs(ModuleInfo, Procs0, Procs) -->
list__map_foldl(rl_opt__proc(ModuleInfo), Procs0, Procs).
:- pred rl_opt__proc(module_info::in, rl_proc::in, rl_proc::out,
io__state::di, io__state::uo) is det.
rl_opt__proc(ModuleInfo, Proc0, Proc) -->
{ Proc0 = rl_proc(Name, _, _, _, _, _, MercuryProcs) },
{ rl__proc_name_to_string(Name, NameStr) },
globals__io_lookup_bool_option(very_verbose, VeryVerbose),
globals__io_lookup_bool_option(verbose, Verbose),
globals__io_lookup_bool_option(debug_rl_opt, Debug),
maybe_write_string(Verbose, "% Optimizing RL procedure "),
maybe_write_string(Verbose, NameStr),
maybe_write_string(Verbose, "\n"),
maybe_flush_output(Verbose),
rl_block__create_flow_graph(Debug, ModuleInfo,
Proc0, Info0),
globals__io_lookup_bool_option(optimize_rl_invariants, Loops),
( { Loops = yes } ->
maybe_write_string(VeryVerbose,
"% Detecting loop invariants in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
maybe_flush_output(VeryVerbose),
{ rl_loop__shift_invariants(Info0, Info10) },
maybe_write_string(VeryVerbose, "done.\n"),
rl_opt__maybe_dump_rl(Debug, NameStr,
"10", "invariants", Info10)
;
{ Info10 = Info0 }
),
globals__io_lookup_bool_option(optimize_rl, Opt),
globals__io_lookup_bool_option(optimize_rl_index, OptIndex),
( { Opt = yes } ->
% rl_block_opt.m requires liveness to have been run.
maybe_write_string(VeryVerbose,
"% Detecting liveness in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
maybe_flush_output(VeryVerbose),
rl_liveness(Info10, Info15),
maybe_write_string(VeryVerbose, "done.\n"),
rl_opt__maybe_dump_rl(Debug, NameStr,
"15", "liveness1", Info15),
maybe_write_string(VeryVerbose,
"% Optimizing basic blocks in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
maybe_flush_output(VeryVerbose),
% The `merge_output_projections' flag enables
% the merging of multiple projections of a single
% relation into a single instruction, reducing the
% number of passes over the input relation.
% It is disabled because for small relations
% it significantly worsens performance.
% The problem is that it is much faster to make
% multiple passes over the input relation than
% to materialise all the outputs of the projections.
% If this pass were run again after stream detection,
% the merging could be done if all outputs are materialised
% anyway.
%{ Flags0 = [merge_output_projections] },
{ Flags0 = [] },
{ OptIndex = yes ->
Flags = [add_uniondiff | Flags0]
;
Flags = Flags0
},
rl_block_opt(Flags, Info15, Info20),
maybe_write_string(VeryVerbose, "done.\n"),
rl_opt__maybe_dump_rl(Debug, NameStr,
"20", "block_opt", Info20)
;
{ Info20 = Info10 }
),
maybe_write_string(VeryVerbose,
"% Detecting final liveness in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
maybe_flush_output(VeryVerbose),
rl_liveness(Info20, Info30),
rl_opt__maybe_dump_rl(Debug, NameStr, "30", "liveness", Info30),
maybe_write_string(VeryVerbose, "done.\n"),
( { OptIndex = yes } ->
maybe_write_string(VeryVerbose,
"% Optimizing sorting and indexing in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
rl_sort__proc(Info30, Info40),
maybe_write_string(VeryVerbose, "done.\n"),
rl_opt__maybe_dump_rl(Debug, NameStr,
"40", "rl_sort", Info40)
;
{ Info40 = Info30 }
),
globals__io_lookup_bool_option(detect_rl_streams, OptStreams),
( { OptStreams = yes } ->
maybe_write_string(VeryVerbose,
"% Detecting streams in "),
maybe_write_string(VeryVerbose, NameStr),
maybe_write_string(VeryVerbose, "..."),
{ rl_stream__detect_streams(Info40, Info50) },
maybe_write_string(VeryVerbose, "done.\n"),
rl_opt__maybe_dump_rl(Debug, NameStr,
"50", "streams", Info50)
;
{ Info50 = Info40 }
),
{ rl_block__get_proc(Info50, Name, MercuryProcs, Proc) }.
:- pred rl_opt__maybe_dump_rl(bool::in, string::in, string::in, string::in,
rl_opt_info::in, io__state::di, io__state::uo) is det.
rl_opt__maybe_dump_rl(no, _ProcName, _StageNum, _StageName, _Info) --> [].
rl_opt__maybe_dump_rl(yes, ProcName, StageNum, StageName, Info) -->
io__write_string("\n\n%********************************************\n"),
io__write_strings(["% ", ProcName, "\t", StageNum,
"\t", StageName, "\n\n"]),
rl_block__dump_blocks(yes, Info, _),
io__write_string("%********************************************\n").
%-----------------------------------------------------------------------------%
%-----------------------------------------------------------------------------%
|
