X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fscripts%2Fgenerate_regalloc_if.pl;h=bfc88ff3200abb7d41f3272c4a2fa82418c96f91;hb=19e1d3e44d1bca743b67a9dd9369bba732ed318d;hp=9201745b59da4ca33ba0ed5d0edace29531dadd0;hpb=516482fa4892951b0f20a507f10cc7488ac6b250;p=libfirm diff --git a/ir/be/scripts/generate_regalloc_if.pl b/ir/be/scripts/generate_regalloc_if.pl index 9201745b5..bfc88ff32 100755 --- a/ir/be/scripts/generate_regalloc_if.pl +++ b/ir/be/scripts/generate_regalloc_if.pl @@ -1,636 +1,302 @@ #!/usr/bin/perl -w -# This script generates C code which emits assembler code for the -# assembler ir nodes. It takes a "emit" key from the node specification -# and substitutes lines starting with . with a corresponding fprintf(). +# +# Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. +# +# This file is part of libFirm. +# +# This file may be distributed and/or modified under the terms of the +# GNU General Public License version 2 as published by the Free Software +# Foundation and appearing in the file LICENSE.GPL included in the +# packaging of this file. +# +# Licensees holding valid libFirm Professional Edition licenses may use +# this file in accordance with the libFirm Commercial License. +# Agreement provided with the Software. +# +# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR +# PURPOSE. +# + +# This script generates C code which creates ands sets up functions and +# data structures for the register allocator. # Creation: 2005/11/14 -# $Id$ use strict; use Data::Dumper; +use integer; my $specfile = $ARGV[0]; my $target_dir = $ARGV[1]; our $arch; our %reg_classes; -our %nodes; +our %cpu; # include spec file my $return; -no strict "subs"; +use strict "subs"; unless ($return = do $specfile) { - warn "couldn't parse $specfile: $@" if $@; - warn "couldn't do $specfile: $!" unless defined $return; - warn "couldn't run $specfile" unless $return; + die "Fatal error: couldn't parse $specfile: $@" if $@; + die "Fatal error: couldn't do $specfile: $!" unless defined $return; + die "Fatal error: couldn't run $specfile" unless $return; } use strict "subs"; my $target_c = $target_dir."/gen_".$arch."_regalloc_if.c"; my $target_h = $target_dir."/gen_".$arch."_regalloc_if.h"; -my $target_h_t = $target_dir."/gen_".$arch."_regalloc_if_t.h"; # helper function -sub translate_reg_type { - my $t = shift; - - if ($t == 0) { - return "arch_register_type_none"; - } - else { - my @types; - - if ($t & 1) { - push(@types, "arch_register_type_caller_save"); - } - - if ($t & 2) { - push(@types, "arch_register_type_callee_save"); - } - - if ($t & 4) { - push(@types, "arch_register_type_ignore"); - } - - if ($t & 8) { - push(@types, "arch_register_type_joker"); - } - - return join(" | ", @types); - } +sub map_flags { + my $prefix = shift; + my $flags = shift || "none"; + return join(" | ", map { "$prefix$_" } split(/\s*\|\s*/, $flags)); } # stacks for output -my @obst_regtypes_def; # stack for the register type variables definitions -my @obst_regtypes_decl;# stack for the register type variables declarations -my @obst_regclasses; # stack for the register class variables -my @obst_classdef; # stack to define a name for a class index -my @obst_regdef; # stack to define a name for a register index -my @obst_reginit; # stack for the register type inits -my @obst_req; # stack for the register requirements -my @obst_limit_func; # stack for functions to return a subset of a register class -my @obst_defreq_head; # stack for prototypes of default requirement function -my @obst_header_all; # stack for some extern struct defs needed for bearch_$arch include -my @obst_requirement_def; # stack for requirement name defines - -my $numregs; +my $regtypes_def; # stack for the register type variables definitions +my $regtypes_decl;# stack for the register type variables declarations +my @regclasses; # stack for the register class variables +my $classdef; # stack to define a name for a class index +my $regdef; # stack to define a name for a register index +my $regdef2; +my $regcounts; +my $reginit; # stack for the register type inits +my $single_constraints_decls; +my $single_constraints; + my $class_ptr; my $class_idx = 0; -my $tmp; - -my %reg2class; - -# there is a default NONE requirement -$tmp = "/* Default NONE register requirements */\n"; -$tmp .= "const $arch\_register_req_t $arch\_default_req_none = {\n"; -$tmp .= " {\n"; -$tmp .= " arch_register_req_type_none, /* register type */\n"; -$tmp .= " NULL, /* register class */\n"; -$tmp .= " NULL, /* limit function */\n"; -$tmp .= " NULL, /* limit environment */\n"; -$tmp .= " NULL, /* node for same */\n"; -$tmp .= " NULL /* node for different */\n"; -$tmp .= " },\n"; -$tmp .= " 0, /* same pos */\n"; -$tmp .= " 0 /* different pos */\n"; -$tmp .= "};\n\n"; -push(@obst_req, $tmp); -push(@obst_header_all, "extern const $arch\_register_req_t $arch\_default_req_none;\n"); - -push(@obst_classdef, "enum reg_classes {\n"); +my %regclass2len = (); +my %reg2class = (); + +$classdef .= "enum reg_classes {\n"; my $class_mode; -# generate register type and class variable, init function and default requirements foreach my $class_name (keys(%reg_classes)) { - my @class = @{ $reg_classes{"$class_name"} }; - my $old_classname = $class_name; - - $class_name = $arch."_".$class_name; - $numregs = "N_".$class_name."_REGS"; - $class_ptr = "&".$arch."_reg_classes[CLASS_".$class_name."]"; - $class_mode = pop(@class)->{"mode"}; - - push(@obst_regtypes_decl, "extern arch_register_t ".$class_name."_regs[$numregs];\n"); - push(@obst_regtypes_def, "arch_register_t ".$class_name."_regs[$numregs];\n"); - - push(@obst_classdef, " CLASS_$class_name = $class_idx,\n"); - push(@obst_regclasses, "{ \"$class_name\", $numregs, NULL, ".$class_name."_regs }"); - - # there is a default NORMAL requirement for each class - $tmp = "/* Default NORMAL register requirements for class $class_name */\n"; - $tmp .= "const $arch\_register_req_t $arch\_default_req_$class_name = {\n"; - $tmp .= " {\n"; - $tmp .= " arch_register_req_type_normal,\n"; - $tmp .= " $class_ptr,\n"; - $tmp .= " NULL, /* limit function */ \n"; - $tmp .= " NULL, /* limit environment */\n"; - $tmp .= " NULL, /* node for same */\n"; - $tmp .= " NULL /* node for different */\n"; - $tmp .= " },\n"; - $tmp .= " 0, /* same pos */\n"; - $tmp .= " 0 /* different pos */\n"; - $tmp .= "};\n\n"; - push(@obst_req, $tmp); - push(@obst_header_all, "extern const $arch\_register_req_t $arch\_default_req_$class_name;\n"); + my @class = @{ $reg_classes{"$class_name"} }; my $idx = 0; - push(@obst_reginit, " /* Init of all registers in class '$class_name' */\n\n"); - push(@obst_reginit, " /* set largest possible mode for '$class_name' */\n"); - push(@obst_reginit, " $arch\_reg_classes[CLASS_".$class_name."].mode = $class_mode;\n\n"); - push(@obst_regdef, "enum reg_".$class_name."_values {\n"); foreach (@class) { - # For each class we build for each of it's member registers a limit function - # which limits the class to this particular register. We also build the - # corresponding requirement structs. - # We need those functions to set register requirements on demand in transformation - # esp. for Call and RegParams where we can mix int and float parameters. - - my $limit_func_name = $arch."_limit_".$class_name."_".$_->{"name"}; - - # push the function prototype - $tmp = "void $limit_func_name(void *_unused, bitset_t *bs)"; - push(@obst_defreq_head, $tmp.";\n"); - - # push the function definition - $tmp .= " {\n"; - $tmp .= " bs = bitset_clear_all(bs);\n"; - $tmp .= " bitset_set(bs, REG_".uc($_->{"name"}).");\n"; # REGISTER to index assignment is done some lines down - $tmp .= "}\n\n"; - push(@obst_limit_func, $tmp); - - # push the default requirement struct - $tmp = "const $arch\_register_req_t $arch\_default_req_$class_name\_".$_->{"name"}." = {\n"; - $tmp .= " {\n"; - $tmp .= " arch_register_req_type_limited,\n"; - $tmp .= " $class_ptr,\n"; - $tmp .= " $limit_func_name,\n"; - $tmp .= " NULL, /* limit environment */\n"; - $tmp .= " NULL, /* node for same */\n"; - $tmp .= " NULL /* node for different */\n"; - $tmp .= " },\n"; - $tmp .= " 0, /* same pos */\n"; - $tmp .= " 0 /* different pos */\n"; - $tmp .= "};\n\n"; - push(@obst_req, $tmp); - push(@obst_header_all,"extern const $arch\_register_req_t $arch\_default_req_$class_name\_".$_->{"name"}.";\n"); - - $reg2class{$_->{"name"}} = { "class" => $old_classname, "index" => $idx }; # remember reg to class for later use - push(@obst_regdef, " REG_".uc($_->{"name"})." = $idx,\n"); - push(@obst_reginit, " ".$class_name."_regs[$idx].name = \"".$_->{"name"}."\";\n"); - push(@obst_reginit, " ".$class_name."_regs[$idx].reg_class = $class_ptr;\n"); - push(@obst_reginit, " ".$class_name."_regs[$idx].index = $idx;\n"); - push(@obst_reginit, " ".$class_name."_regs[$idx].type = ".translate_reg_type($_->{"type"}).";\n"); - push(@obst_reginit, "\n"); + if (defined($_->{name})) { + $reg2class{$_->{name}} = { + "class" => $class_name, + "index" => $idx + }; + } $idx++; } - push(@obst_regdef, " $numregs = $idx\n"); - push(@obst_regdef, "};\n\n"); - - $class_idx++; + $regclass2len{$class_name} = $idx; } -push(@obst_classdef, " N_CLASSES = ".scalar(keys(%reg_classes))."\n"); -push(@obst_classdef, "};\n\n"); - -# generate node-register constraints -foreach my $op (keys(%nodes)) { - my %n = %{ $nodes{"$op"} }; - - next if (!exists($n{"reg_req"})); - - $op = $arch."_".$op; - - push(@obst_req, "/* IN requirements for '$op' */\n"); - # check for argument requirements - if (exists($n{"reg_req"}{"in"})) { - generate_requirements(\%n, $op, "in"); - } +sub get_limited_array { + my $reg = shift; + my $regclass = $reg2class{"$reg"}{"class"}; + my $ucname = uc($reg); + my $result = "{ "; + + my $limitedbitsetlen = $regclass2len{$regclass}; + my $arraylen = ($limitedbitsetlen+31) / 32; + my $firstreg = uc($reg_classes{$regclass}[0]->{"name"}); + my $classuc = uc($regclass); + my $first = 1; + for (my $i = 0; $i < $arraylen; ++$i) { + if ($first) { + $first = 0; + } else { + $result .= ", "; + } - push(@obst_req, "/* OUT requirements for '$op' */\n"); - # check for result requirements - if (exists($n{"reg_req"}{"out"})) { - generate_requirements(\%n, $op, "out"); + my $index = $reg2class{"$reg"}{"index"}; + if ($index >= $i*32 && $index < ($i+1)*32) { + if ($i > 0) { + $result .= "(1 << (REG_${classuc}_${ucname} % 32))"; + } else { + $result .= "(1 << REG_${classuc}_${ucname})"; + } + } else { + $result .= "0"; + } } + $result .= " }"; } +# generate register type and class variable, init function and default requirements +foreach my $class_name (keys(%reg_classes)) { + my @class = @{ $reg_classes{"$class_name"} }; + my $old_classname = $class_name; + $class_name = $arch."_".$class_name; + $class_ptr = "&".$arch."_reg_classes[CLASS_".$class_name."]"; + my $flags = pop(@class); + $class_mode = $flags->{"mode"}; + my $flags_prepared = map_flags("arch_register_class_flag_", $flags->{"flags"}); + + $single_constraints .= <$target_h_t") || die("Could not open $target_h_t, reason: $!\n"); - -my $creation_time = localtime(time()); - -$tmp = uc($arch); + $classdef .= "\tCLASS_$class_name = $class_idx,\n"; + my $numregs = @class; + my $first_reg = "&${arch}_registers[REG_". uc($class[0]->{"name"}) . "]"; + push(@regclasses, "{ $class_idx, \"$class_name\", $numregs, NULL, $first_reg, $flags_prepared, &${arch}_class_reg_req_${old_classname} }"); -print OUT<{"name"}; + my $ucname = uc($name); + my $type = map_flags("arch_register_type_", $_->{"type"}); + # realname is name if not set by user + $_->{"realname"} = $_->{"name"} if (! exists($_->{"realname"})); + my $realname = $_->{realname}; + my $classuc = uc($old_classname); + + $regdef .= "\tREG_${ucname},\n"; + $regdef2 .= "\tREG_${classuc}_${ucname} = $idx,\n"; + my $dwarf_number = 0; + if (defined($_->{dwarf})) { + $dwarf_number = $_->{dwarf}; + } -/** - * Generated register classes from spec. - * - * DO NOT EDIT THIS FILE, your changes will be lost. - * Edit $specfile instead. - * created by: $0 $specfile $target_dir - * date: $creation_time - */ + $regtypes_def .= <$target_h") || die("Could not open $target_h, reason: $!\n"); +open(OUT, ">$target_h") || die("Fatal error: Could not open $target_h, reason: $!\n"); -$creation_time = localtime(time()); +my $creation_time = localtime(time()); print OUT<$target_c") || die("Could not open $target_c, reason: $!\n"); +# generate c file +open(OUT, ">$target_c") || die("Fatal error: Could not open $target_c, reason: $!\n"); $creation_time = localtime(time()); print OUT<{"reg_req"}{"$inout"})) { - my @reqs = @{ $n->{"reg_req"}{"$inout"} }; - - for (my $idx = 0; $idx <= $#reqs; $idx++) { - my $class = undef; - - if ($reqs[$idx] eq "none") { - $class = "none"; - } - elsif (is_reg_class($reqs[$idx])) { - $class = $reqs[$idx]; - } - else { - my @regs = split(/ /, $reqs[$idx]); -GET_CLASS: foreach my $reg (@regs) { - if ($reg =~ /!?(in|out)\_r\d+/ || $reg =~ /!in/) { - $class = "UNKNOWN_CLASS"; - } - else { - $class = get_reg_class($reg); - if (!defined $class) { - die("Could not get ".uc($inout)." register class for '$op' pos $idx (reg $reg) ... exiting.\n"); - } - else { - last GET_CLASS; - } # !defined class - } # if (reg =~ ... - } # foreach - } # if - - push(@idx_class, $class); - } # for - } # if - - return @idx_class; -} - -### -# Generates the requirements for the given description -### -sub generate_requirements { - my $n = shift; - my $op = shift; - my $inout = shift; - - # get classes for the complementary direction - my $outin = ($inout eq "in") ? "out" : "in"; - - my @reqs = @{ $n->{"reg_req"}{"$inout"} }; - - for (my $idx = 0; $idx <= $#reqs; $idx++) { - my $class = undef; - - my $tmp2 = "const $arch\_register_req_t _".$op."_reg_req_$inout\_$idx = "; - my $tmp = "#define ".$op."_reg_req_$inout\_$idx "; - - if ($reqs[$idx] eq "none") { - $tmp .= "&$arch\_default_req_none\n"; - } - elsif ($reqs[$idx] =~ /^new_reg_(.*)$/) { - if (is_reg_class($1)) { - $tmp .= "&_".$op."_reg_req_$inout\_$idx\n"; - $tmp2 .= "{\n"; - $tmp2 .= " {\n"; - $tmp2 .= " arch_register_req_type_should_be_different_from_all,\n"; - $tmp2 .= " &$arch\_reg_classes[CLASS_$arch\_".$1."],\n"; - $tmp2 .= " NULL, /* limit function */\n"; - $tmp2 .= " NULL, /* limit environment */\n"; - $tmp2 .= " NULL, /* same node */\n"; - $tmp2 .= " NULL /* different node */\n"; - $tmp2 .= " },\n"; - $tmp2 .= " 0,\n"; - $tmp2 .= " 0\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_all, "extern const $arch\_register_req_t _".$op."_reg_req_$inout\_$idx;\n"); - } - else { - print STDERR "Invalid register class '$1' given in OUT requirement $idx for '$op'.\n"; - } - } - elsif (is_reg_class($reqs[$idx])) { - $tmp .= "&$arch\_default_req_".$arch."_".$reqs[$idx]."\n"; - } - else { - my @req_type_mask; - my ($class, $has_limit, $same_pos, $different_pos) = build_subset_class_func($n, $op, $idx, (($inout eq "in") ? 1 : 0), $reqs[$idx]); - - if (!defined($class)) { - die("Could not build subset for ".uc($inout)." requirements '$op' pos $idx ... exiting.\n"); - } - - if ($has_limit) { - push(@req_type_mask, "arch_register_req_type_limited"); - } - if (defined($same_pos)) { - push(@req_type_mask, "arch_register_req_type_should_be_same"); - } - if (defined($different_pos)) { - if ($different_pos == 666) { - push(@req_type_mask, "arch_register_req_type_should_be_different_from_all"); - undef $different_pos; - } - else { - push(@req_type_mask, "arch_register_req_type_should_be_different"); - } - } - - $tmp .= "&_".$op."_reg_req_$inout\_$idx\n"; - $tmp2 .= "{\n"; - $tmp2 .= " {\n"; - $tmp2 .= " ".join(" | ", @req_type_mask).",\n"; - $tmp2 .= " &$arch\_reg_classes[CLASS_$arch\_".$class."],\n"; - $tmp2 .= " ".($has_limit ? "limit_reg_".$op."_$inout\_".$idx : "NULL").",\n"; - $tmp2 .= " NULL, /* limit environment */\n"; - $tmp2 .= " NULL, /* same node */\n"; - $tmp2 .= " NULL /* different node */\n"; - $tmp2 .= " },\n"; - $tmp2 .= " ".(defined($same_pos) ? $same_pos : "0").",\n"; - $tmp2 .= " ".(defined($different_pos) ? $different_pos : "0")."\n"; - $tmp2 .= "};\n"; - - push(@obst_req, $tmp2."\n"); - push(@obst_header_all, "extern const $arch\_register_req_t _".$op."_reg_req_$inout\_$idx;\n"); - } - - push(@obst_requirement_def, $tmp); - } - -} - -### -# Determines whether $name is a specified register class or not. -# @return 1 if name is register class, 0 otherwise -### -sub is_reg_class { - my $name = shift; - return 1 if exists($reg_classes{"$name"}); - return 0; -} - -### -# Returns the register class for a given register. -# @return class or undef -### -sub get_reg_class { - my $reg = shift; - $reg = substr($reg, 1) if ($reg =~ /!.*/); - return $reg2class{"$reg"}{"class"} if (exists($reg2class{"$reg"})); - return undef; -} - -### -# Returns the index of a given register within it's register class. -# @return index or undef -### -sub get_reg_index { - my $reg = shift; - return $reg2class{"$reg"}{"index"} if (exists($reg2class{"$reg"})); - return undef; -} - -### -# Generates the function for a given $op and a given IN-index -# which returns a subset of possible register from a register class -# @return classname from which the subset is derived or undef and -# pos which corresponds to in/out reference position or undef -### -sub build_subset_class_func { - my $neg = undef; - my $class = undef; - my $has_limit = 0; - my $same_pos = undef; - my $different_pos = undef; - my $temp; - my @obst_init; - my @obst_limits; - my @obst_ignore; - - - # build function header - my $n = shift; - my $op = shift; - my $idx = shift; - my $in = shift; - - my $outin = $in ? "out" : "in"; - my @regs = split(/ /, shift); - - my @idx_class = build_inout_idx_class($n, $op, $outin); - - # set/unset registers -CHECK_REQS: foreach (@regs) { - if (/(!)?$outin\_r(\d+)/) { - if (($1 && defined($different_pos)) || (!$1 && defined($same_pos))) { - print STDERR "Multiple in/out references of same type in one requirement not allowed.\n"; - return (undef, undef, undef, undef); - } +print OUT "arch_register_class_t ${arch}_reg_classes[] = {\n\t".join(",\n\t", @regclasses)."\n};\n\n"; - if ($1) { - $different_pos = $in ? -$2 : $2 - 1; - } - else { - $same_pos = $in ? -$2 : $2 - 1; - } - - $class = $idx_class[$2 - 1]; - next CHECK_REQS; - } - elsif (/!in/) { - $class = $idx_class[0]; - return ($class, 0, undef, 666); - } - - # check for negate - if (substr($_, 0, 1) eq "!") { - if (defined($neg) && $neg == 0) { - # we have seen a positiv constraint as first one but this one is negative - # this doesn't make sense - print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n"; - return (undef, undef, undef, undef); - } - - if (!defined($neg)) { - $has_limit = 1; - push(@obst_init, " bs = bitset_set_all(bs); /* allow all register (negative constraints given) */\n"); - } - - $_ = substr($_, 1); # skip '!' - $neg = 1; - } - else { - if (defined($neg) && $neg == 1) { - # we have seen a negative constraint as first one but this one is positive - # this doesn't make sense - print STDERR "Mixed positive and negative constraints for the same slot are not allowed.\n"; - return (undef, undef, undef, undef); - } - - if (!defined($neg)) { - $has_limit = 1; - push(@obst_init, " bs = bitset_clear_all(bs); /* disallow all register (positive constraints given) */\n"); - } - $neg = 0; - } - - # check if register belongs to one of the given classes - $temp = get_reg_class($_); - if (!defined($temp)) { - print STDERR "Unknown register '$_'!\n"; - return (undef, undef, undef, undef); - } - - # set class - if (!defined($class)) { - $class = $temp; - } - elsif ($class ne $temp) { - # all registers must belong to the same class - print STDERR "Registerclass mismatch. '$_' is not member of class '$class'.\n"; - return (undef, undef, undef, undef); - } - - if ($neg == 1) { - $has_limit = 1; - push(@obst_limits, " bitset_clear(bs, ".get_reg_index($_)."); /* disallow $_ */\n"); - } - else { - $has_limit = 1; - push(@obst_limits, " bitset_set(bs, ".get_reg_index($_)."); /* allow $_ */\n"); - } - } - - my @cur_class = @{ $reg_classes{"$class"} }; - for (my $idx = 0; $idx <= $#cur_class; $idx++) { - if (defined($cur_class[$idx]{"type"}) && ($cur_class[$idx]{"type"} & 4)) { - push(@obst_ignore, " bitset_clear(bs, ".get_reg_index($cur_class[$idx]{"name"}).");"); - push(@obst_ignore, " /* disallow ignore reg ".$cur_class[$idx]{"name"}." */\n"); - } - } - - if ($has_limit == 1) { - push(@obst_header_all, "void limit_reg_".$op."_".($in ? "in" : "out")."_".$idx."(void *_unused, bitset_t *bs);\n"); +print OUT<