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# Copyright (C) 2013-2020 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
# This Awk script takes passes.def and writes pass-instances.def,
# counting the instances of each kind of pass, adding an instance number
# to everywhere that NEXT_PASS is used.
# Also handle INSERT_PASS_AFTER, INSERT_PASS_BEFORE and REPLACE_PASS
# directives.
#
# For example, the single-instanced pass:
# NEXT_PASS (pass_warn_unused_result);
# becomes this in the output:
# NEXT_PASS (pass_warn_unused_result, 1);
#
# The various instances of
# NEXT_PASS (pass_copy_prop);
# become:
# NEXT_PASS (pass_copy_prop, 1);
# through:
# NEXT_PASS (pass_copy_prop, 8);
# (currently there are 8 instances of that pass)
#
# INSERT_PASS_AFTER (pass_copy_prop, 1, pass_stv);
# will insert
# NEXT_PASS (pass_stv, 1);
# immediately after the NEXT_PASS (pass_copy_prop, 1) line,
# similarly INSERT_PASS_BEFORE inserts immediately before that line.
# REPLACE_PASS (pass_copy_prop, 1, pass_stv, true);
# will replace NEXT_PASS (pass_copy_prop, 1) line with
# NEXT_PASS (pass_stv, 1, true);
# line and renumber all higher pass_copy_prop instances if any.
# Usage: awk -f gen-pass-instances.awk passes.def
BEGIN {
print "/* This file is auto-generated by gen-pass-instances.awk";
print " from passes.def. */";
lineno = 1;
}
function parse_line(line, fnname, len_of_call, len_of_start,
len_of_open, len_of_close,
len_of_args, args_start_at,
args_str, len_of_prefix,
call_starts_at,
postfix_starts_at)
{
# Find call expression.
call_starts_at = match(line, fnname " \\(.+\\)");
if (call_starts_at == 0)
return 0;
# Length of the call expression.
len_of_call = RLENGTH;
len_of_start = length(fnname " (");
len_of_open = length("(");
len_of_close = length(")");
# Find arguments
len_of_args = len_of_call - (len_of_start + len_of_close);
args_start_at = call_starts_at + len_of_start;
args_str = substr(line, args_start_at, len_of_args);
split(args_str, args, ",");
# Find call expression prefix
len_of_prefix = call_starts_at - 1;
prefix = substr(line, 1, len_of_prefix);
# Find call expression postfix
postfix_starts_at = call_starts_at + len_of_call;
postfix = substr(line, postfix_starts_at);
return 1;
}
function adjust_linenos(above, increment, p, i)
{
for (p in pass_lines)
if (pass_lines[p] >= above)
pass_lines[p] += increment;
if (increment > 0)
for (i = lineno - 1; i >= above; i--)
lines[i + increment] = lines[i];
else
for (i = above; i < lineno; i++)
lines[i + increment] = lines[i];
lineno += increment;
}
function insert_remove_pass(line, fnname, arg3)
{
parse_line($0, fnname);
pass_name = args[1];
if (pass_name == "PASS")
return 1;
pass_num = args[2] + 0;
arg3 = args[3];
sub(/^[ \t]*/, "", arg3);
new_line = prefix "NEXT_PASS (" arg3;
if (args[4])
new_line = new_line "," args[4];
new_line = new_line ")" postfix;
if (!pass_lines[pass_name, pass_num])
{
print "ERROR: Can't locate instance of the pass mentioned in " fnname;
return 1;
}
return 0;
}
function insert_pass(line, fnname, after, num)
{
if (insert_remove_pass(line, fnname))
return;
num = pass_lines[pass_name, pass_num];
adjust_linenos(num + after, 1);
pass_name = args[3];
# Set pass_counts
if (args[3] in pass_counts)
pass_counts[pass_name]++;
else
pass_counts[pass_name] = 1;
pass_lines[pass_name, pass_counts[pass_name]] = num + after;
lines[num + after] = new_line;
}
function replace_pass(line, fnname, num, i)
{
if (insert_remove_pass(line, "REPLACE_PASS"))
return;
num = pass_lines[pass_name, pass_num];
for (i = pass_counts[pass_name]; i > pass_num; i--)
pass_lines[pass_name, i - 1] = pass_lines[pass_name, i];
delete pass_lines[pass_name, pass_counts[pass_name]];
if (pass_counts[pass_name] == 1)
delete pass_counts[pass_name];
else
pass_counts[pass_name]--;
pass_name = args[3];
# Set pass_counts
if (args[3] in pass_counts)
pass_counts[pass_name]++;
else
pass_counts[pass_name] = 1;
pass_lines[pass_name, pass_counts[pass_name]] = num;
lines[num] = new_line;
}
/INSERT_PASS_AFTER \(.+\)/ {
insert_pass($0, "INSERT_PASS_AFTER", 1);
next;
}
/INSERT_PASS_BEFORE \(.+\)/ {
insert_pass($0, "INSERT_PASS_BEFORE", 0);
next;
}
/REPLACE_PASS \(.+\)/ {
replace_pass($0, "REPLACE_PASS");
next;
}
{
ret = parse_line($0, "NEXT_PASS");
if (ret)
{
pass_name = args[1];
# Set pass_counts
if (pass_name in pass_counts)
pass_counts[pass_name]++;
else
pass_counts[pass_name] = 1;
pass_lines[pass_name, pass_counts[pass_name]] = lineno;
}
lines[lineno++] = $0;
}
END {
for (i = 1; i < lineno; i++)
{
ret = parse_line(lines[i], "NEXT_PASS");
if (ret)
{
# Set pass_name argument, an optional with_arg argument
pass_name = args[1];
with_arg = args[2];
# Set pass_final_counts
if (pass_name in pass_final_counts)
pass_final_counts[pass_name]++;
else
pass_final_counts[pass_name] = 1;
pass_num = pass_final_counts[pass_name];
# Print call expression with extra pass_num argument
printf "%s", prefix;
if (with_arg)
printf "NEXT_PASS_WITH_ARG";
else
printf "NEXT_PASS";
printf " (%s, %s", pass_name, pass_num;
if (with_arg)
printf ",%s", with_arg;
printf ")%s\n", postfix;
}
else
print lines[i];
}
}
# Local Variables:
# mode:awk
# c-basic-offset:8
# End:
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