571 lines
20 KiB
Python
Executable File
571 lines
20 KiB
Python
Executable File
#!/usr/bin/env python3
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"""A test case update script.
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This script is a utility to update LLVM 'llvm-mca' based test cases with new
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FileCheck patterns.
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"""
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import argparse
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from collections import defaultdict
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import glob
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import os
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import sys
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import warnings
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from UpdateTestChecks import common
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COMMENT_CHAR = '#'
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ADVERT_PREFIX = '{} NOTE: Assertions have been autogenerated by '.format(
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COMMENT_CHAR)
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ADVERT = '{}utils/{}'.format(ADVERT_PREFIX, os.path.basename(__file__))
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class Error(Exception):
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""" Generic Error that can be raised without printing a traceback.
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"""
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pass
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def _warn(msg):
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""" Log a user warning to stderr.
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"""
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warnings.warn(msg, Warning, stacklevel=2)
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def _configure_warnings(args):
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warnings.resetwarnings()
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if args.w:
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warnings.simplefilter('ignore')
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if args.Werror:
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warnings.simplefilter('error')
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def _showwarning(message, category, filename, lineno, file=None, line=None):
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""" Version of warnings.showwarning that won't attempt to print out the
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line at the location of the warning if the line text is not explicitly
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specified.
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"""
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if file is None:
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file = sys.stderr
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if line is None:
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line = ''
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file.write(warnings.formatwarning(message, category, filename, lineno, line))
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def _parse_args():
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('-w',
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action='store_true',
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help='suppress warnings')
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parser.add_argument('-Werror',
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action='store_true',
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help='promote warnings to errors')
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parser.add_argument('--llvm-mca-binary',
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metavar='<path>',
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default='llvm-mca',
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help='the binary to use to generate the test case '
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'(default: llvm-mca)')
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parser.add_argument('tests',
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metavar='<test-path>',
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nargs='+')
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args = common.parse_commandline_args(parser)
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_configure_warnings(args)
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if not args.llvm_mca_binary:
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raise Error('--llvm-mca-binary value cannot be empty string')
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if 'llvm-mca' not in os.path.basename(args.llvm_mca_binary):
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_warn('unexpected binary name: {}'.format(args.llvm_mca_binary))
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return args
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def _get_run_infos(run_lines, args):
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run_infos = []
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for run_line in run_lines:
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try:
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(tool_cmd, filecheck_cmd) = tuple([cmd.strip()
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for cmd in run_line.split('|', 1)])
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except ValueError:
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_warn('could not split tool and filecheck commands: {}'.format(run_line))
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continue
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common.verify_filecheck_prefixes(filecheck_cmd)
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tool_basename = os.path.splitext(os.path.basename(args.llvm_mca_binary))[0]
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if not tool_cmd.startswith(tool_basename + ' '):
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_warn('skipping non-{} RUN line: {}'.format(tool_basename, run_line))
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continue
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if not filecheck_cmd.startswith('FileCheck '):
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_warn('skipping non-FileCheck RUN line: {}'.format(run_line))
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continue
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tool_cmd_args = tool_cmd[len(tool_basename):].strip()
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tool_cmd_args = tool_cmd_args.replace('< %s', '').replace('%s', '').strip()
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check_prefixes = [item
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for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
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for item in m.group(1).split(',')]
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if not check_prefixes:
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check_prefixes = ['CHECK']
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run_infos.append((check_prefixes, tool_cmd_args))
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return run_infos
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def _break_down_block(block_info, common_prefix):
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""" Given a block_info, see if we can analyze it further to let us break it
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down by prefix per-line rather than per-block.
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"""
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texts = block_info.keys()
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prefixes = list(block_info.values())
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# Split the lines from each of the incoming block_texts and zip them so that
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# each element contains the corresponding lines from each text. E.g.
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#
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# block_text_1: A # line 1
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# B # line 2
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#
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# block_text_2: A # line 1
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# C # line 2
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#
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# would become:
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#
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# [(A, A), # line 1
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# (B, C)] # line 2
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#
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line_tuples = list(zip(*list((text.splitlines() for text in texts))))
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# To simplify output, we'll only proceed if the very first line of the block
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# texts is common to each of them.
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if len(set(line_tuples[0])) != 1:
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return []
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result = []
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lresult = defaultdict(list)
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for i, line in enumerate(line_tuples):
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if len(set(line)) == 1:
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# We're about to output a line with the common prefix. This is a sync
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# point so flush any batched-up lines one prefix at a time to the output
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# first.
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for prefix in sorted(lresult):
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result.extend(lresult[prefix])
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lresult = defaultdict(list)
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# The line is common to each block so output with the common prefix.
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result.append((common_prefix, line[0]))
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else:
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# The line is not common to each block, or we don't have a common prefix.
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# If there are no prefixes available, warn and bail out.
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if not prefixes[0]:
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_warn('multiple lines not disambiguated by prefixes:\n{}\n'
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'Some blocks may be skipped entirely as a result.'.format(
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'\n'.join(' - {}'.format(l) for l in line)))
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return []
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# Iterate through the line from each of the blocks and add the line with
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# the corresponding prefix to the current batch of results so that we can
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# later output them per-prefix.
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for i, l in enumerate(line):
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for prefix in prefixes[i]:
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lresult[prefix].append((prefix, l))
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# Flush any remaining batched-up lines one prefix at a time to the output.
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for prefix in sorted(lresult):
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result.extend(lresult[prefix])
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return result
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def _get_useful_prefix_info(run_infos):
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""" Given the run_infos, calculate any prefixes that are common to every one,
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and the length of the longest prefix string.
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"""
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try:
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all_sets = [set(s) for s in list(zip(*run_infos))[0]]
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common_to_all = set.intersection(*all_sets)
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longest_prefix_len = max(len(p) for p in set.union(*all_sets))
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except IndexError:
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common_to_all = []
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longest_prefix_len = 0
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else:
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if len(common_to_all) > 1:
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_warn('Multiple prefixes common to all RUN lines: {}'.format(
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common_to_all))
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if common_to_all:
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common_to_all = sorted(common_to_all)[0]
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return common_to_all, longest_prefix_len
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def _align_matching_blocks(all_blocks, farthest_indexes):
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""" Some sub-sequences of blocks may be common to multiple lists of blocks,
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but at different indexes in each one.
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For example, in the following case, A,B,E,F, and H are common to both
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sets, but only A and B would be identified as such due to the indexes
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matching:
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index | 0 1 2 3 4 5 6
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------+--------------
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setA | A B C D E F H
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setB | A B E F G H
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This function attempts to align the indexes of matching blocks by
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inserting empty blocks into the block list. With this approach, A, B, E,
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F, and H would now be able to be identified as matching blocks:
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index | 0 1 2 3 4 5 6 7
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------+----------------
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setA | A B C D E F H
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setB | A B E F G H
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"""
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# "Farthest block analysis": essentially, iterate over all blocks and find
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# the highest index into a block list for the first instance of each block.
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# This is relatively expensive, but we're dealing with small numbers of
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# blocks so it doesn't make a perceivable difference to user time.
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for blocks in all_blocks.values():
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for block in blocks:
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if not block:
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continue
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index = blocks.index(block)
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if index > farthest_indexes[block]:
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farthest_indexes[block] = index
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# Use the results of the above analysis to identify any blocks that can be
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# shunted along to match the farthest index value.
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for blocks in all_blocks.values():
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for index, block in enumerate(blocks):
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if not block:
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continue
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changed = False
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# If the block has not already been subject to alignment (i.e. if the
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# previous block is not empty) then insert empty blocks until the index
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# matches the farthest index identified for that block.
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if (index > 0) and blocks[index - 1]:
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while(index < farthest_indexes[block]):
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blocks.insert(index, '')
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index += 1
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changed = True
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if changed:
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# Bail out. We'll need to re-do the farthest block analysis now that
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# we've inserted some blocks.
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return True
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return False
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def _get_block_infos(run_infos, test_path, args, common_prefix): # noqa
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""" For each run line, run the tool with the specified args and collect the
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output. We use the concept of 'blocks' for uniquing, where a block is
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a series of lines of text with no more than one newline character between
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each one. For example:
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This
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is
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one
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block
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This is
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another block
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This is yet another block
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We then build up a 'block_infos' structure containing a dict where the
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text of each block is the key and a list of the sets of prefixes that may
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generate that particular block. This then goes through a series of
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transformations to minimise the amount of CHECK lines that need to be
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written by taking advantage of common prefixes.
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"""
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def _block_key(tool_args, prefixes):
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""" Get a hashable key based on the current tool_args and prefixes.
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"""
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return ' '.join([tool_args] + prefixes)
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all_blocks = {}
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max_block_len = 0
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# A cache of the furthest-back position in any block list of the first
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# instance of each block, indexed by the block itself.
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farthest_indexes = defaultdict(int)
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# Run the tool for each run line to generate all of the blocks.
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for prefixes, tool_args in run_infos:
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key = _block_key(tool_args, prefixes)
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raw_tool_output = common.invoke_tool(args.llvm_mca_binary,
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tool_args,
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test_path)
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# Replace any lines consisting of purely whitespace with empty lines.
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raw_tool_output = '\n'.join(line if line.strip() else ''
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for line in raw_tool_output.splitlines())
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# Split blocks, stripping all trailing whitespace, but keeping preceding
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# whitespace except for newlines so that columns will line up visually.
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all_blocks[key] = [b.lstrip('\n').rstrip()
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for b in raw_tool_output.split('\n\n')]
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max_block_len = max(max_block_len, len(all_blocks[key]))
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# Attempt to align matching blocks until no more changes can be made.
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made_changes = True
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while made_changes:
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made_changes = _align_matching_blocks(all_blocks, farthest_indexes)
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# If necessary, pad the lists of blocks with empty blocks so that they are
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# all the same length.
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for key in all_blocks:
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len_to_pad = max_block_len - len(all_blocks[key])
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all_blocks[key] += [''] * len_to_pad
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# Create the block_infos structure where it is a nested dict in the form of:
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# block number -> block text -> list of prefix sets
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block_infos = defaultdict(lambda: defaultdict(list))
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for prefixes, tool_args in run_infos:
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key = _block_key(tool_args, prefixes)
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for block_num, block_text in enumerate(all_blocks[key]):
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block_infos[block_num][block_text].append(set(prefixes))
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# Now go through the block_infos structure and attempt to smartly prune the
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# number of prefixes per block to the minimal set possible to output.
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for block_num in range(len(block_infos)):
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# When there are multiple block texts for a block num, remove any
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# prefixes that are common to more than one of them.
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# E.g. [ [{ALL,FOO}] , [{ALL,BAR}] ] -> [ [{FOO}] , [{BAR}] ]
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all_sets = [s for s in block_infos[block_num].values()]
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pruned_sets = []
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for i, setlist in enumerate(all_sets):
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other_set_values = set([elem for j, setlist2 in enumerate(all_sets)
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for set_ in setlist2 for elem in set_
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if i != j])
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pruned_sets.append([s - other_set_values for s in setlist])
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for i, block_text in enumerate(block_infos[block_num]):
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# When a block text matches multiple sets of prefixes, try removing any
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# prefixes that aren't common to all of them.
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# E.g. [ {ALL,FOO} , {ALL,BAR} ] -> [{ALL}]
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common_values = set.intersection(*pruned_sets[i])
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if common_values:
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pruned_sets[i] = [common_values]
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# Everything should be uniqued as much as possible by now. Apply the
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# newly pruned sets to the block_infos structure.
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# If there are any blocks of text that still match multiple prefixes,
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# output a warning.
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current_set = set()
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for s in pruned_sets[i]:
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s = sorted(list(s))
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if s:
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current_set.add(s[0])
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if len(s) > 1:
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_warn('Multiple prefixes generating same output: {} '
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'(discarding {})'.format(','.join(s), ','.join(s[1:])))
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if block_text and not current_set:
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raise Error(
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'block not captured by existing prefixes:\n\n{}'.format(block_text))
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block_infos[block_num][block_text] = sorted(list(current_set))
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# If we have multiple block_texts, try to break them down further to avoid
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# the case where we have very similar block_texts repeated after each
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# other.
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if common_prefix and len(block_infos[block_num]) > 1:
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# We'll only attempt this if each of the block_texts have the same number
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# of lines as each other.
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same_num_Lines = (len(set(len(k.splitlines())
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for k in block_infos[block_num].keys())) == 1)
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if same_num_Lines:
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breakdown = _break_down_block(block_infos[block_num], common_prefix)
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if breakdown:
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block_infos[block_num] = breakdown
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return block_infos
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def _write_block(output, block, not_prefix_set, common_prefix, prefix_pad):
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""" Write an individual block, with correct padding on the prefixes.
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Returns a set of all of the prefixes that it has written.
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"""
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end_prefix = ': '
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previous_prefix = None
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num_lines_of_prefix = 0
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written_prefixes = set()
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for prefix, line in block:
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if prefix in not_prefix_set:
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_warn('not writing for prefix {0} due to presence of "{0}-NOT:" '
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'in input file.'.format(prefix))
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continue
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# If the previous line isn't already blank and we're writing more than one
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# line for the current prefix output a blank line first, unless either the
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# current of previous prefix is common to all.
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num_lines_of_prefix += 1
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if prefix != previous_prefix:
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if output and output[-1]:
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if num_lines_of_prefix > 1 or any(p == common_prefix
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for p in (prefix, previous_prefix)):
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output.append('')
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num_lines_of_prefix = 0
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previous_prefix = prefix
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written_prefixes.add(prefix)
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output.append(
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'{} {}{}{} {}'.format(COMMENT_CHAR,
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prefix,
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end_prefix,
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' ' * (prefix_pad - len(prefix)),
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line).rstrip())
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end_prefix = '-NEXT:'
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output.append('')
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return written_prefixes
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def _write_output(test_path, input_lines, prefix_list, block_infos, # noqa
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args, common_prefix, prefix_pad):
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prefix_set = set([prefix for prefixes, _ in prefix_list
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for prefix in prefixes])
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not_prefix_set = set()
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output_lines = []
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for input_line in input_lines:
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if input_line.startswith(ADVERT_PREFIX):
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continue
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if input_line.startswith(COMMENT_CHAR):
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m = common.CHECK_RE.match(input_line)
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try:
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prefix = m.group(1)
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except AttributeError:
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prefix = None
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if '{}-NOT:'.format(prefix) in input_line:
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not_prefix_set.add(prefix)
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if prefix not in prefix_set or prefix in not_prefix_set:
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output_lines.append(input_line)
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continue
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if common.should_add_line_to_output(input_line, prefix_set):
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# This input line of the function body will go as-is into the output.
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# Except make leading whitespace uniform: 2 spaces.
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input_line = common.SCRUB_LEADING_WHITESPACE_RE.sub(r' ', input_line)
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# Skip empty lines if the previous output line is also empty.
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if input_line or output_lines[-1]:
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output_lines.append(input_line)
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else:
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continue
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# Add a blank line before the new checks if required.
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if len(output_lines) > 0 and output_lines[-1]:
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output_lines.append('')
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output_check_lines = []
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used_prefixes = set()
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for block_num in range(len(block_infos)):
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if type(block_infos[block_num]) is list:
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# The block is of the type output from _break_down_block().
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used_prefixes |= _write_block(output_check_lines,
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block_infos[block_num],
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not_prefix_set,
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common_prefix,
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prefix_pad)
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else:
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# _break_down_block() was unable to do do anything so output the block
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# as-is.
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# Rather than writing out each block as soon we encounter it, save it
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# indexed by prefix so that we can write all of the blocks out sorted by
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# prefix at the end.
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output_blocks = defaultdict(list)
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for block_text in sorted(block_infos[block_num]):
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if not block_text:
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continue
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lines = block_text.split('\n')
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for prefix in block_infos[block_num][block_text]:
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assert prefix not in output_blocks
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used_prefixes |= _write_block(output_blocks[prefix],
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[(prefix, line) for line in lines],
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|
not_prefix_set,
|
|
common_prefix,
|
|
prefix_pad)
|
|
|
|
for prefix in sorted(output_blocks):
|
|
output_check_lines.extend(output_blocks[prefix])
|
|
|
|
unused_prefixes = (prefix_set - not_prefix_set) - used_prefixes
|
|
if unused_prefixes:
|
|
raise Error('unused prefixes: {}'.format(sorted(unused_prefixes)))
|
|
|
|
if output_check_lines:
|
|
output_lines.insert(0, ADVERT)
|
|
output_lines.extend(output_check_lines)
|
|
|
|
# The file should not end with two newlines. It creates unnecessary churn.
|
|
while len(output_lines) > 0 and output_lines[-1] == '':
|
|
output_lines.pop()
|
|
|
|
if input_lines == output_lines:
|
|
sys.stderr.write(' [unchanged]\n')
|
|
return
|
|
sys.stderr.write(' [{} lines total]\n'.format(len(output_lines)))
|
|
|
|
common.debug('Writing', len(output_lines), 'lines to', test_path, '..\n\n')
|
|
|
|
with open(test_path, 'wb') as f:
|
|
f.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines])
|
|
|
|
def main():
|
|
args = _parse_args()
|
|
test_paths = [test for pattern in args.tests for test in glob.glob(pattern)]
|
|
for test_path in test_paths:
|
|
sys.stderr.write('Test: {}\n'.format(test_path))
|
|
|
|
# Call this per test. By default each warning will only be written once
|
|
# per source location. Reset the warning filter so that now each warning
|
|
# will be written once per source location per test.
|
|
_configure_warnings(args)
|
|
|
|
if not os.path.isfile(test_path):
|
|
raise Error('could not find test file: {}'.format(test_path))
|
|
|
|
with open(test_path) as f:
|
|
input_lines = [l.rstrip() for l in f]
|
|
|
|
run_lines = common.find_run_lines(test_path, input_lines)
|
|
run_infos = _get_run_infos(run_lines, args)
|
|
common_prefix, prefix_pad = _get_useful_prefix_info(run_infos)
|
|
block_infos = _get_block_infos(run_infos, test_path, args, common_prefix)
|
|
_write_output(test_path,
|
|
input_lines,
|
|
run_infos,
|
|
block_infos,
|
|
args,
|
|
common_prefix,
|
|
prefix_pad)
|
|
|
|
return 0
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
warnings.showwarning = _showwarning
|
|
sys.exit(main())
|
|
except Error as e:
|
|
sys.stdout.write('error: {}\n'.format(e))
|
|
sys.exit(1)
|