forked from OSchip/llvm-project
442 lines
16 KiB
Python
Executable File
442 lines
16 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Updates FileCheck checks in MIR tests.
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This script is a utility to update MIR based tests with new FileCheck
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patterns.
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The checks added by this script will cover the entire body of each
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function it handles. Virtual registers used are given names via
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FileCheck patterns, so if you do want to check a subset of the body it
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should be straightforward to trim out the irrelevant parts. None of
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the YAML metadata will be checked, other than function names.
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If there are multiple llc commands in a test, the full set of checks
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will be repeated for each different check pattern. Checks for patterns
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that are common between different commands will be left as-is by
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default, or removed if the --remove-common-prefixes flag is provided.
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"""
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from __future__ import print_function
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import argparse
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import collections
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import glob
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import os
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import re
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import subprocess
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import sys
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from UpdateTestChecks import common
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MIR_FUNC_NAME_RE = re.compile(r' *name: *(?P<func>[A-Za-z0-9_.-]+)')
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MIR_BODY_BEGIN_RE = re.compile(r' *body: *\|')
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MIR_BASIC_BLOCK_RE = re.compile(r' *bb\.[0-9]+.*:$')
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VREG_RE = re.compile(r'(%[0-9]+)(?::[a-z0-9_]+)?(?:\([<>a-z0-9 ]+\))?')
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MI_FLAGS_STR= (
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r'(frame-setup |frame-destroy |nnan |ninf |nsz |arcp |contract |afn '
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r'|reassoc |nuw |nsw |exact |fpexcept )*')
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VREG_DEF_RE = re.compile(
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r'^ *(?P<vregs>{0}(?:, {0})*) = '
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r'{1}(?P<opcode>[A-Zt][A-Za-z0-9_]+)'.format(VREG_RE.pattern, MI_FLAGS_STR))
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MIR_PREFIX_DATA_RE = re.compile(r'^ *(;|bb.[0-9].*: *$|[a-z]+:( |$)|$)')
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IR_FUNC_NAME_RE = re.compile(
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r'^\s*define\s+(?:internal\s+)?[^@]*@(?P<func>[A-Za-z0-9_.]+)\s*\(')
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IR_PREFIX_DATA_RE = re.compile(r'^ *(;|$)')
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MIR_FUNC_RE = re.compile(
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r'^---$'
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r'\n'
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r'^ *name: *(?P<func>[A-Za-z0-9_.-]+)$'
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r'.*?'
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r'^ *body: *\|\n'
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r'(?P<body>.*?)\n'
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r'^\.\.\.$',
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flags=(re.M | re.S))
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class LLC:
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def __init__(self, bin):
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self.bin = bin
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def __call__(self, args, ir):
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if ir.endswith('.mir'):
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args = '{} -x mir'.format(args)
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with open(ir) as ir_file:
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stdout = subprocess.check_output('{} {}'.format(self.bin, args),
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shell=True, stdin=ir_file)
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if sys.version_info[0] > 2:
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stdout = stdout.decode()
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# Fix line endings to unix CR style.
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stdout = stdout.replace('\r\n', '\n')
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return stdout
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class Run:
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def __init__(self, prefixes, cmd_args, triple):
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self.prefixes = prefixes
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self.cmd_args = cmd_args
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self.triple = triple
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def __getitem__(self, index):
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return [self.prefixes, self.cmd_args, self.triple][index]
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def log(msg, verbose=True):
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if verbose:
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print(msg, file=sys.stderr)
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def find_triple_in_ir(lines, verbose=False):
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for l in lines:
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m = common.TRIPLE_IR_RE.match(l)
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if m:
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return m.group(1)
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return None
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def build_run_list(test, run_lines, verbose=False):
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run_list = []
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all_prefixes = []
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for l in run_lines:
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if '|' not in l:
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common.warn('Skipping unparseable RUN line: ' + l)
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continue
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commands = [cmd.strip() for cmd in l.split('|', 1)]
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llc_cmd = commands[0]
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filecheck_cmd = commands[1] if len(commands) > 1 else ''
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common.verify_filecheck_prefixes(filecheck_cmd)
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if not llc_cmd.startswith('llc '):
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common.warn('Skipping non-llc RUN line: {}'.format(l), test_file=test)
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continue
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if not filecheck_cmd.startswith('FileCheck '):
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common.warn('Skipping non-FileChecked RUN line: {}'.format(l),
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test_file=test)
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continue
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triple = None
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m = common.TRIPLE_ARG_RE.search(llc_cmd)
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if m:
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triple = m.group(1)
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# If we find -march but not -mtriple, use that.
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m = common.MARCH_ARG_RE.search(llc_cmd)
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if m and not triple:
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triple = '{}--'.format(m.group(1))
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cmd_args = llc_cmd[len('llc'):].strip()
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cmd_args = cmd_args.replace('< %s', '').replace('%s', '').strip()
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check_prefixes = [
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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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all_prefixes += check_prefixes
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run_list.append(Run(check_prefixes, cmd_args, triple))
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# Sort prefixes that are shared between run lines before unshared prefixes.
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# This causes us to prefer printing shared prefixes.
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for run in run_list:
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run.prefixes.sort(key=lambda prefix: -all_prefixes.count(prefix))
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return run_list
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def find_functions_with_one_bb(lines, verbose=False):
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result = []
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cur_func = None
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bbs = 0
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for line in lines:
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m = MIR_FUNC_NAME_RE.match(line)
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if m:
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if bbs == 1:
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result.append(cur_func)
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cur_func = m.group('func')
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bbs = 0
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m = MIR_BASIC_BLOCK_RE.match(line)
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if m:
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bbs += 1
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if bbs == 1:
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result.append(cur_func)
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return result
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def build_function_body_dictionary(test, raw_tool_output, triple, prefixes,
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func_dict, verbose):
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for m in MIR_FUNC_RE.finditer(raw_tool_output):
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func = m.group('func')
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body = m.group('body')
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if verbose:
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log('Processing function: {}'.format(func))
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for l in body.splitlines():
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log(' {}'.format(l))
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# Vreg mangling
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mangled = []
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vreg_map = {}
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for func_line in body.splitlines(keepends=True):
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m = VREG_DEF_RE.match(func_line)
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if m:
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for vreg in VREG_RE.finditer(m.group('vregs')):
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name = mangle_vreg(m.group('opcode'), vreg_map.values())
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vreg_map[vreg.group(1)] = name
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func_line = func_line.replace(
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vreg.group(1), '[[{}:%[0-9]+]]'.format(name), 1)
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for number, name in vreg_map.items():
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func_line = re.sub(r'{}\b'.format(number), '[[{}]]'.format(name),
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func_line)
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mangled.append(func_line)
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body = ''.join(mangled)
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for prefix in prefixes:
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if func in func_dict[prefix]:
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if func_dict[prefix][func] != body:
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func_dict[prefix][func] = None
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else:
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func_dict[prefix][func] = body
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def add_checks_for_function(test, output_lines, run_list, func_dict, func_name,
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single_bb, verbose=False):
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printed_prefixes = set()
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for run in run_list:
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for prefix in run.prefixes:
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if prefix in printed_prefixes:
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break
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if not func_dict[prefix][func_name]:
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continue
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# if printed_prefixes:
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# # Add some space between different check prefixes.
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# output_lines.append('')
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printed_prefixes.add(prefix)
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log('Adding {} lines for {}'.format(prefix, func_name), verbose)
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add_check_lines(test, output_lines, prefix, func_name, single_bb,
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func_dict[prefix][func_name].splitlines())
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break
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else:
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common.warn(
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'Found conflicting asm for function: {}'.format(func_name),
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test_file=test)
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return output_lines
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def add_check_lines(test, output_lines, prefix, func_name, single_bb,
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func_body):
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if single_bb:
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# Don't bother checking the basic block label for a single BB
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func_body.pop(0)
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if not func_body:
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common.warn('Function has no instructions to check: {}'.format(func_name),
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test_file=test)
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return
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first_line = func_body[0]
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indent = len(first_line) - len(first_line.lstrip(' '))
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# A check comment, indented the appropriate amount
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check = '{:>{}}; {}'.format('', indent, prefix)
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output_lines.append('{}-LABEL: name: {}'.format(check, func_name))
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first_check = True
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for func_line in func_body:
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if not func_line.strip():
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# The mir printer prints leading whitespace so we can't use CHECK-EMPTY:
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output_lines.append(check + '-NEXT: {{' + func_line + '$}}')
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continue
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filecheck_directive = check if first_check else check + '-NEXT'
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first_check = False
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check_line = '{}: {}'.format(filecheck_directive, func_line[indent:]).rstrip()
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output_lines.append(check_line)
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def mangle_vreg(opcode, current_names):
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base = opcode
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# Simplify some common prefixes and suffixes
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if opcode.startswith('G_'):
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base = base[len('G_'):]
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if opcode.endswith('_PSEUDO'):
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base = base[:len('_PSEUDO')]
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# Shorten some common opcodes with long-ish names
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base = dict(IMPLICIT_DEF='DEF',
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GLOBAL_VALUE='GV',
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CONSTANT='C',
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FCONSTANT='C',
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MERGE_VALUES='MV',
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UNMERGE_VALUES='UV',
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INTRINSIC='INT',
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INTRINSIC_W_SIDE_EFFECTS='INT',
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INSERT_VECTOR_ELT='IVEC',
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EXTRACT_VECTOR_ELT='EVEC',
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SHUFFLE_VECTOR='SHUF').get(base, base)
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# Avoid ambiguity when opcodes end in numbers
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if len(base.rstrip('0123456789')) < len(base):
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base += '_'
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i = 0
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for name in current_names:
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if name.rstrip('0123456789') == base:
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i += 1
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if i:
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return '{}{}'.format(base, i)
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return base
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def should_add_line_to_output(input_line, prefix_set):
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# Skip any check lines that we're handling.
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m = common.CHECK_RE.match(input_line)
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if m and m.group(1) in prefix_set:
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return False
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return True
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def update_test_file(args, test):
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with open(test) as fd:
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input_lines = [l.rstrip() for l in fd]
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script_name = os.path.basename(__file__)
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first_line = input_lines[0] if input_lines else ""
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if 'autogenerated' in first_line and script_name not in first_line:
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common.warn("Skipping test which wasn't autogenerated by " +
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script_name + ": " + test)
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return
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if args.update_only:
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if not first_line or 'autogenerated' not in first_line:
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common.warn("Skipping test which isn't autogenerated: " + test)
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return
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triple_in_ir = find_triple_in_ir(input_lines, args.verbose)
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run_lines = common.find_run_lines(test, input_lines)
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run_list = build_run_list(test, run_lines, args.verbose)
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simple_functions = find_functions_with_one_bb(input_lines, args.verbose)
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func_dict = {}
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for run in run_list:
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for prefix in run.prefixes:
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func_dict.update({prefix: dict()})
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for prefixes, llc_args, triple_in_cmd in run_list:
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log('Extracted LLC cmd: llc {}'.format(llc_args), args.verbose)
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log('Extracted FileCheck prefixes: {}'.format(prefixes), args.verbose)
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raw_tool_output = args.llc(llc_args, test)
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if not triple_in_cmd and not triple_in_ir:
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common.warn('No triple found: skipping file', test_file=test)
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return
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build_function_body_dictionary(test, raw_tool_output,
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triple_in_cmd or triple_in_ir,
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prefixes, func_dict, args.verbose)
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state = 'toplevel'
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func_name = None
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prefix_set = set([prefix for run in run_list for prefix in run.prefixes])
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log('Rewriting FileCheck prefixes: {}'.format(prefix_set), args.verbose)
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comment_char = '#' if test.endswith('.mir') else ';'
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autogenerated_note = ('{} NOTE: Assertions have been autogenerated by '
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'utils/{}'.format(comment_char, script_name))
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output_lines = []
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output_lines.append(autogenerated_note)
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for input_line in input_lines:
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if input_line == autogenerated_note:
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continue
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if state == 'toplevel':
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m = IR_FUNC_NAME_RE.match(input_line)
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if m:
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state = 'ir function prefix'
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func_name = m.group('func')
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if input_line.rstrip('| \r\n') == '---':
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state = 'document'
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output_lines.append(input_line)
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elif state == 'document':
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m = MIR_FUNC_NAME_RE.match(input_line)
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if m:
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state = 'mir function metadata'
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func_name = m.group('func')
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if input_line.strip() == '...':
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state = 'toplevel'
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func_name = None
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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elif state == 'mir function metadata':
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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m = MIR_BODY_BEGIN_RE.match(input_line)
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if m:
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if func_name in simple_functions:
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# If there's only one block, put the checks inside it
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state = 'mir function prefix'
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continue
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state = 'mir function body'
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add_checks_for_function(test, output_lines, run_list,
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func_dict, func_name, single_bb=False,
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verbose=args.verbose)
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elif state == 'mir function prefix':
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m = MIR_PREFIX_DATA_RE.match(input_line)
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if not m:
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state = 'mir function body'
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add_checks_for_function(test, output_lines, run_list,
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func_dict, func_name, single_bb=True,
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verbose=args.verbose)
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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elif state == 'mir function body':
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if input_line.strip() == '...':
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state = 'toplevel'
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func_name = None
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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elif state == 'ir function prefix':
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m = IR_PREFIX_DATA_RE.match(input_line)
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if not m:
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state = 'ir function body'
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add_checks_for_function(test, output_lines, run_list,
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func_dict, func_name, single_bb=False,
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verbose=args.verbose)
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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elif state == 'ir function body':
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if input_line.strip() == '}':
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state = 'toplevel'
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func_name = None
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if should_add_line_to_output(input_line, prefix_set):
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output_lines.append(input_line)
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log('Writing {} lines to {}...'.format(len(output_lines), test), args.verbose)
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with open(test, 'wb') as fd:
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fd.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines])
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def main():
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parser = argparse.ArgumentParser(
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description=__doc__, formatter_class=argparse.RawTextHelpFormatter)
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parser.add_argument('--llc-binary', dest='llc', default='llc', type=LLC,
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help='The "llc" binary to generate the test case with')
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parser.add_argument('tests', nargs='+')
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args = common.parse_commandline_args(parser)
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test_paths = [test for pattern in args.tests for test in glob.glob(pattern)]
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for test in test_paths:
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try:
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update_test_file(args, test)
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except Exception:
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common.warn('Error processing file', test_file=test)
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raise
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if __name__ == '__main__':
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main()
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