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#!/usr/bin/env python2.7
"""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.
"""
import argparse
import os # Used to advertise this file's name ("autogenerated_note").
import string
import subprocess
import sys
import re
from UpdateTestChecks import asm, common
ADVERT = '; NOTE: Assertions have been autogenerated by '
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('-v', '--verbose', action='store_true',
help='Show verbose output')
parser.add_argument('--llc-binary', default='llc',
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_rip', action='store_true', default=True,
help='Use more regex for x86 matching to reduce diffs between various subtargets')
parser.add_argument(
'--no_x86_scrub_rip', action='store_false', dest='x86_scrub_rip')
parser.add_argument('tests', nargs='+')
args = parser.parse_args()
autogenerated_note = (ADVERT + 'utils/' + os.path.basename(__file__))
for test in args.tests:
if args.verbose:
print >>sys.stderr, 'Scanning for RUN lines in test file: %s' % (test,)
with open(test) as f:
input_lines = [l.rstrip() for l in f]
triple_in_ir = None
for l in input_lines:
m = common.TRIPLE_IR_RE.match(l)
if m:
triple_in_ir = m.groups()[0]
break
raw_lines = [m.group(1)
for m in [common.RUN_LINE_RE.match(l) for l in input_lines] if m]
run_lines = [raw_lines[0]] if len(raw_lines) > 0 else []
for l in raw_lines[1:]:
if run_lines[-1].endswith("\\"):
run_lines[-1] = run_lines[-1].rstrip("\\") + " " + l
else:
run_lines.append(l)
if args.verbose:
print >>sys.stderr, 'Found %d RUN lines:' % (len(run_lines),)
for l in run_lines:
print >>sys.stderr, ' RUN: ' + l
run_list = []
for l in run_lines:
commands = [cmd.strip() for cmd in l.split('|', 1)]
llc_cmd = commands[0]
triple_in_cmd = None
m = common.TRIPLE_ARG_RE.search(llc_cmd)
if m:
triple_in_cmd = m.groups()[0]
filecheck_cmd = ''
if len(commands) > 1:
filecheck_cmd = commands[1]
if not llc_cmd.startswith('llc '):
print >>sys.stderr, 'WARNING: Skipping non-llc RUN line: ' + l
continue
if not filecheck_cmd.startswith('FileCheck '):
print >>sys.stderr, 'WARNING: Skipping non-FileChecked RUN line: ' + l
continue
llc_cmd_args = llc_cmd[len('llc'):].strip()
llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
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_cmd_args, triple_in_cmd))
func_dict = {}
for p in run_list:
prefixes = p[0]
for prefix in prefixes:
func_dict.update({prefix: dict()})
for prefixes, llc_args, triple_in_cmd in run_list:
if args.verbose:
print >>sys.stderr, 'Extracted LLC cmd: llc ' + llc_args
print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
raw_tool_output = common.invoke_tool(args.llc_binary, llc_args, test)
if not (triple_in_cmd or triple_in_ir):
print >>sys.stderr, "Cannot find a triple. Assume 'x86'"
asm.build_function_body_dictionary_for_triple(args, raw_tool_output,
triple_in_cmd or triple_in_ir or 'x86', prefixes, func_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]])
if args.verbose:
print >>sys.stderr, 'Rewriting FileCheck prefixes: %s' % (prefix_set,)
output_lines = []
output_lines.append(autogenerated_note)
for input_line in input_lines:
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.
asm.add_asm_checks(output_lines, ';', run_list, func_dict, func_name)
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
# Discard any previous script advertising.
if input_line.startswith(ADVERT):
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 args.verbose:
print>>sys.stderr, 'Writing %d lines to %s...' % (len(output_lines), test)
with open(test, 'wb') as f:
f.writelines([l + '\n' for l in output_lines])
if __name__ == '__main__':
main()
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