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#!/usr/bin/env python3
"""A test case update script.
This script is a utility to update LLVM 'llc' based test cases with new
FileCheck patterns. It can either update all of the tests in the file or
a single test function.
"""
from __future__ import print_function
import argparse
import os # Used to advertise this file's name ("autogenerated_note").
from UpdateTestChecks import common
# llc is the only llc-like in the LLVM tree but downstream forks can add
# additional ones here if they have them.
LLC_LIKE_TOOLS = ('llc',)
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('--llc-binary', default=None,
help='The "llc" binary to use to generate the test case')
parser.add_argument(
'--function', help='The function in the test file to update')
parser.add_argument(
'--extra_scrub', action='store_true',
help='Always use additional regex to further reduce diffs between various subtargets')
parser.add_argument(
'--x86_scrub_sp', action='store_true', default=True,
help='Use regex for x86 sp matching to reduce diffs between various subtargets')
parser.add_argument(
'--no_x86_scrub_sp', action='store_false', dest='x86_scrub_sp')
parser.add_argument(
'--x86_scrub_rip', action='store_true', default=False,
help='Use more regex for x86 rip matching to reduce diffs between various subtargets')
parser.add_argument(
'--no_x86_scrub_rip', action='store_false', dest='x86_scrub_rip')
parser.add_argument(
'--no_x86_scrub_mem_shuffle', action='store_true', default=False,
help='Reduce scrubbing shuffles with memory operands')
parser.add_argument('tests', nargs='+')
initial_args = common.parse_commandline_args(parser)
script_name = os.path.basename(__file__)
for ti in common.itertests(initial_args.tests, parser,
script_name='utils/' + script_name):
triple_in_ir = None
for l in ti.input_lines:
m = common.TRIPLE_IR_RE.match(l)
if m:
triple_in_ir = m.groups()[0]
break
run_list = []
for l in ti.run_lines:
if '|' not in l:
common.warn('Skipping unparsable RUN line: ' + l)
continue
commands = [cmd.strip() for cmd in l.split('|')]
assert len(commands) >= 2
preprocess_cmd = None
if len(commands) > 2:
preprocess_cmd = " | ".join(commands[:-2])
llc_cmd = commands[-2]
filecheck_cmd = commands[-1]
llc_tool = llc_cmd.split(' ')[0]
triple_in_cmd = None
m = common.TRIPLE_ARG_RE.search(llc_cmd)
if m:
triple_in_cmd = m.groups()[0]
march_in_cmd = None
m = common.MARCH_ARG_RE.search(llc_cmd)
if m:
march_in_cmd = m.groups()[0]
m = common.DEBUG_ONLY_ARG_RE.search(llc_cmd)
if m and m.groups()[0] == 'isel':
from UpdateTestChecks import isel as output_type
else:
from UpdateTestChecks import asm as output_type
common.verify_filecheck_prefixes(filecheck_cmd)
if llc_tool not in LLC_LIKE_TOOLS:
common.warn('Skipping non-llc RUN line: ' + l)
continue
if not filecheck_cmd.startswith('FileCheck '):
common.warn('Skipping non-FileChecked RUN line: ' + l)
continue
llc_cmd_args = llc_cmd[len(llc_tool):].strip()
llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
if ti.path.endswith('.mir'):
llc_cmd_args += ' -x mir'
check_prefixes = [item for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
for item in m.group(1).split(',')]
if not check_prefixes:
check_prefixes = ['CHECK']
# FIXME: We should use multiple check prefixes to common check lines. For
# now, we just ignore all but the last.
run_list.append((check_prefixes, llc_tool, llc_cmd_args, preprocess_cmd,
triple_in_cmd, march_in_cmd))
if ti.path.endswith('.mir'):
check_indent = ' '
else:
check_indent = ''
builder = common.FunctionTestBuilder(
run_list=run_list,
flags=type('', (object,), {
'verbose': ti.args.verbose,
'filters': ti.args.filters,
'function_signature': False,
'check_attributes': False,
'replace_value_regex': []}),
scrubber_args=[ti.args],
path=ti.path)
for prefixes, llc_tool, llc_args, preprocess_cmd, triple_in_cmd, march_in_cmd in run_list:
common.debug('Extracted LLC cmd:', llc_tool, llc_args)
common.debug('Extracted FileCheck prefixes:', str(prefixes))
raw_tool_output = common.invoke_tool(ti.args.llc_binary or llc_tool,
llc_args, ti.path, preprocess_cmd,
verbose=ti.args.verbose)
triple = triple_in_cmd or triple_in_ir
if not triple:
triple = common.get_triple_from_march(march_in_cmd)
scrubber, function_re = output_type.get_run_handler(triple)
builder.process_run_line(function_re, scrubber, raw_tool_output, prefixes, True)
builder.processed_prefixes(prefixes)
func_dict = builder.finish_and_get_func_dict()
global_vars_seen_dict = {}
is_in_function = False
is_in_function_start = False
func_name = None
prefix_set = set([prefix for p in run_list for prefix in p[0]])
common.debug('Rewriting FileCheck prefixes:', str(prefix_set))
output_lines = []
include_generated_funcs = common.find_arg_in_test(ti,
lambda args: ti.args.include_generated_funcs,
'--include-generated-funcs',
True)
generated_prefixes = []
if include_generated_funcs:
# Generate the appropriate checks for each function. We need to emit
# these in the order according to the generated output so that CHECK-LABEL
# works properly. func_order provides that.
# We can't predict where various passes might insert functions so we can't
# be sure the input function order is maintained. Therefore, first spit
# out all the source lines.
common.dump_input_lines(output_lines, ti, prefix_set, ';')
# Now generate all the checks.
generated_prefixes = common.add_checks_at_end(
output_lines, run_list, builder.func_order(),
check_indent + ';',
lambda my_output_lines, prefixes, func:
output_type.add_checks(my_output_lines,
check_indent + ';',
prefixes, func_dict, func,
global_vars_seen_dict,
is_filtered=builder.is_filtered()))
else:
for input_info in ti.iterlines(output_lines):
input_line = input_info.line
args = input_info.args
if is_in_function_start:
if input_line == '':
continue
if input_line.lstrip().startswith(';'):
m = common.CHECK_RE.match(input_line)
if not m or m.group(1) not in prefix_set:
output_lines.append(input_line)
continue
# Print out the various check lines here.
generated_prefixes.extend(
output_type.add_checks(output_lines, check_indent + ';', run_list,
func_dict, func_name, global_vars_seen_dict,
is_filtered=builder.is_filtered()))
is_in_function_start = False
if is_in_function:
if common.should_add_line_to_output(input_line, prefix_set):
# This input line of the function body will go as-is into the output.
output_lines.append(input_line)
else:
continue
if input_line.strip() == '}':
is_in_function = False
continue
# If it's outside a function, it just gets copied to the output.
output_lines.append(input_line)
m = common.IR_FUNCTION_RE.match(input_line)
if not m:
continue
func_name = m.group(1)
if args.function is not None and func_name != args.function:
# When filtering on a specific function, skip all others.
continue
is_in_function = is_in_function_start = True
if ti.args.gen_unused_prefix_body:
output_lines.extend(ti.get_checks_for_unused_prefixes(
run_list, generated_prefixes))
common.debug('Writing %d lines to %s...' % (len(output_lines), ti.path))
with open(ti.path, 'wb') as f:
f.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines])
if __name__ == '__main__':
main()
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