llvm-project/llvm/utils/update_cc_test_checks.py

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#!/usr/bin/env python
'''A utility to update LLVM IR CHECK lines in C/C++ FileCheck test files.
Example RUN lines in .c/.cc test files:
// RUN: %clang -emit-llvm -S %s -o - -O2 | FileCheck %s
// RUN: %clangxx -emit-llvm -S %s -o - -O2 | FileCheck -check-prefix=CHECK-A %s
Usage:
% utils/update_cc_test_checks.py --llvm-bin=release/bin test/a.cc
% utils/update_cc_test_checks.py --clang=release/bin/clang /tmp/c/a.cc
'''
from __future__ import print_function
import argparse
import collections
import distutils.spawn
import json
import os
import re
import shlex
import subprocess
import sys
import tempfile
from UpdateTestChecks import common
SUBST = {
'%clang': [],
'%clang_cc1': ['-cc1'],
'%clangxx': ['--driver-mode=g++'],
}
def get_line2spell_and_mangled(args, clang_args):
ret = {}
# Use clang's JSON AST dump to get the mangled name
json_dump_args = [args.clang] + clang_args + ['-fsyntax-only', '-o', '-']
if '-cc1' not in json_dump_args:
# For tests that invoke %clang instead if %clang_cc1 we have to use
# -Xclang -ast-dump=json instead:
json_dump_args.append('-Xclang')
json_dump_args.append('-ast-dump=json')
common.debug('Running', ' '.join(json_dump_args))
popen = subprocess.Popen(json_dump_args, stdout=subprocess.PIPE,
stderr=subprocess.PIPE, universal_newlines=True)
stdout, stderr = popen.communicate()
if popen.returncode != 0:
sys.stderr.write('Failed to run ' + ' '.join(json_dump_args) + '\n')
sys.stderr.write(stderr)
sys.stderr.write(stdout)
sys.exit(2)
# Parse the clang JSON and add all children of type FunctionDecl.
# TODO: Should we add checks for global variables being emitted?
def parse_clang_ast_json(node):
node_kind = node['kind']
# Recurse for the following nodes that can contain nested function decls:
if node_kind in ('NamespaceDecl', 'LinkageSpecDecl', 'TranslationUnitDecl',
'CXXRecordDecl'):
if 'inner' in node:
for inner in node['inner']:
parse_clang_ast_json(inner)
# Otherwise we ignore everything except functions:
if node_kind not in ('FunctionDecl', 'CXXMethodDecl', 'CXXConstructorDecl',
'CXXDestructorDecl', 'CXXConversionDecl'):
return
if node.get('isImplicit') is True and node.get('storageClass') == 'extern':
common.debug('Skipping builtin function:', node['name'], '@', node['loc'])
return
common.debug('Found function:', node['kind'], node['name'], '@', node['loc'])
line = node['loc'].get('line')
# If there is no line it is probably a builtin function -> skip
if line is None:
common.debug('Skipping function without line number:', node['name'], '@', node['loc'])
return
# If there is no 'inner' object, it is a function declaration and we can
# skip it. However, function declarations may also contain an 'inner' list,
# but in that case it will only contains ParmVarDecls. If we find an entry
# that is not a ParmVarDecl, we know that this is a function definition.
has_body = False
if 'inner' in node:
for i in node['inner']:
if i.get('kind', 'ParmVarDecl') != 'ParmVarDecl':
has_body = True
break
if not has_body:
common.debug('Skipping function without body:', node['name'], '@', node['loc'])
return
spell = node['name']
mangled = node.get('mangledName', spell)
ret[int(line)-1] = (spell, mangled)
ast = json.loads(stdout)
if ast['kind'] != 'TranslationUnitDecl':
common.error('Clang AST dump JSON format changed?')
sys.exit(2)
parse_clang_ast_json(ast)
for line, func_name in sorted(ret.items()):
common.debug('line {}: found function {}'.format(line+1, func_name), file=sys.stderr)
if not ret:
common.warn('Did not find any functions using', ' '.join(json_dump_args))
return ret
def str_to_commandline(value):
if not value:
return []
return shlex.split(value)
def config():
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument('--llvm-bin', help='llvm $prefix/bin path')
parser.add_argument('--clang',
help='"clang" executable, defaults to $llvm_bin/clang')
parser.add_argument('--clang-args', default=[], type=str_to_commandline,
help='Space-separated extra args to clang, e.g. --clang-args=-v')
parser.add_argument('--opt',
help='"opt" executable, defaults to $llvm_bin/opt')
parser.add_argument(
'--functions', nargs='+', help='A list of function name regexes. '
'If specified, update CHECK lines for functions matching at least one regex')
parser.add_argument(
'--x86_extra_scrub', action='store_true',
help='Use more regex for x86 matching to reduce diffs between various subtargets')
parser.add_argument('--function-signature', action='store_true',
help='Keep function signature information around for the check line')
parser.add_argument('tests', nargs='+')
args = common.parse_commandline_args(parser)
if args.clang is None:
if args.llvm_bin is None:
args.clang = 'clang'
else:
args.clang = os.path.join(args.llvm_bin, 'clang')
if not distutils.spawn.find_executable(args.clang):
print('Please specify --llvm-bin or --clang', file=sys.stderr)
sys.exit(1)
# Determine the builtin includes directory so that we can update tests that
# depend on the builtin headers. See get_clang_builtin_include_dir() and
# use_clang() in llvm/utils/lit/lit/llvm/config.py.
try:
builtin_include_dir = subprocess.check_output(
[args.clang, '-print-file-name=include']).decode().strip()
SUBST['%clang_cc1'] = ['-cc1', '-internal-isystem', builtin_include_dir,
'-nostdsysteminc']
except subprocess.CalledProcessError:
common.warn('Could not determine clang builtins directory, some tests '
'might not update correctly.')
if args.opt is None:
if args.llvm_bin is None:
args.opt = 'opt'
else:
args.opt = os.path.join(args.llvm_bin, 'opt')
if not distutils.spawn.find_executable(args.opt):
# Many uses of this tool will not need an opt binary, because it's only
# needed for updating a test that runs clang | opt | FileCheck. So we
# defer this error message until we find that opt is actually needed.
args.opt = None
return args, parser
def get_function_body(args, filename, clang_args, extra_commands, prefixes, triple_in_cmd, func_dict):
# TODO Clean up duplication of asm/common build_function_body_dictionary
# Invoke external tool and extract function bodies.
raw_tool_output = common.invoke_tool(args.clang, clang_args, filename)
for extra_command in extra_commands:
extra_args = shlex.split(extra_command)
with tempfile.NamedTemporaryFile() as f:
f.write(raw_tool_output.encode())
f.flush()
if extra_args[0] == 'opt':
if args.opt is None:
print(filename, 'needs to run opt. '
'Please specify --llvm-bin or --opt', file=sys.stderr)
sys.exit(1)
extra_args[0] = args.opt
raw_tool_output = common.invoke_tool(extra_args[0],
extra_args[1:], f.name)
if '-emit-llvm' in clang_args:
common.build_function_body_dictionary(
common.OPT_FUNCTION_RE, common.scrub_body, [],
raw_tool_output, prefixes, func_dict, args.verbose, args.function_signature)
else:
print('The clang command line should include -emit-llvm as asm tests '
'are discouraged in Clang testsuite.', file=sys.stderr)
sys.exit(1)
def main():
initial_args, parser = config()
script_name = os.path.basename(__file__)
for ti in common.itertests(initial_args.tests, parser, 'utils/' + script_name,
comment_prefix='//'):
# Build a list of clang command lines and check prefixes from RUN lines.
run_list = []
line2spell_and_mangled_list = collections.defaultdict(list)
for l in ti.run_lines:
commands = [cmd.strip() for cmd in l.split('|')]
triple_in_cmd = None
m = common.TRIPLE_ARG_RE.search(commands[0])
if m:
triple_in_cmd = m.groups()[0]
# Apply %clang substitution rule, replace %s by `filename`, and append args.clang_args
clang_args = shlex.split(commands[0])
if clang_args[0] not in SUBST:
print('WARNING: Skipping non-clang RUN line: ' + l, file=sys.stderr)
continue
clang_args[0:1] = SUBST[clang_args[0]]
clang_args = [ti.path if i == '%s' else i for i in clang_args] + ti.args.clang_args
# Permit piping the output through opt
if not (len(commands) == 2 or
(len(commands) == 3 and commands[1].startswith('opt'))):
print('WARNING: Skipping non-clang RUN line: ' + l, file=sys.stderr)
# Extract -check-prefix in FileCheck args
filecheck_cmd = commands[-1]
common.verify_filecheck_prefixes(filecheck_cmd)
if not filecheck_cmd.startswith('FileCheck '):
print('WARNING: Skipping non-FileChecked RUN line: ' + l, file=sys.stderr)
continue
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']
run_list.append((check_prefixes, clang_args, commands[1:-1], triple_in_cmd))
# Execute clang, generate LLVM IR, and extract functions.
func_dict = {}
for p in run_list:
prefixes = p[0]
for prefix in prefixes:
func_dict.update({prefix: dict()})
for prefixes, clang_args, extra_commands, triple_in_cmd in run_list:
common.debug('Extracted clang cmd: clang {}'.format(clang_args))
common.debug('Extracted FileCheck prefixes: {}'.format(prefixes))
get_function_body(ti.args, ti.path, clang_args, extra_commands, prefixes, triple_in_cmd, func_dict)
# Invoke clang -Xclang -ast-dump=json to get mapping from start lines to
# mangled names. Forward all clang args for now.
for k, v in get_line2spell_and_mangled(ti.args, clang_args).items():
line2spell_and_mangled_list[k].append(v)
prefix_set = set([prefix for p in run_list for prefix in p[0]])
output_lines = []
for line_info in ti.iterlines(output_lines):
idx = line_info.line_number
line = line_info.line
args = line_info.args
include_line = True
m = common.CHECK_RE.match(line)
if m and m.group(1) in prefix_set:
continue # Don't append the existing CHECK lines
if idx in line2spell_and_mangled_list:
added = set()
for spell, mangled in line2spell_and_mangled_list[idx]:
# One line may contain multiple function declarations.
# Skip if the mangled name has been added before.
# The line number may come from an included file,
# we simply require the spelling name to appear on the line
# to exclude functions from other files.
if mangled in added or spell not in line:
continue
if args.functions is None or any(re.search(regex, spell) for regex in args.functions):
last_line = output_lines[-1].strip()
while last_line == '//':
# Remove the comment line since we will generate a new comment
# line as part of common.add_ir_checks()
output_lines.pop()
last_line = output_lines[-1].strip()
if added:
output_lines.append('//')
added.add(mangled)
common.add_ir_checks(output_lines, '//', run_list, func_dict, mangled,
False, args.function_signature)
if line.rstrip('\n') == '//':
include_line = False
if include_line:
output_lines.append(line.rstrip('\n'))
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])
return 0
if __name__ == '__main__':
sys.exit(main())