forked from OSchip/llvm-project
222 lines
7.8 KiB
Python
Executable File
222 lines
7.8 KiB
Python
Executable File
#!/usr/bin/env python2.7
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"""A test case update script.
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This script is a utility to update LLVM X86 'llc' based test cases with new
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FileCheck patterns. It can either update all of the tests in the file or
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a single test function.
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"""
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import argparse
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import itertools
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import string
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import subprocess
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import sys
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import tempfile
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import re
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def llc(args, cmd_args, ir):
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with open(ir) as ir_file:
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stdout = subprocess.check_output(args.llc_binary + ' ' + cmd_args,
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shell=True, stdin=ir_file)
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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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ASM_SCRUB_WHITESPACE_RE = re.compile(r'(?!^(| \w))[ \t]+', flags=re.M)
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ASM_SCRUB_TRAILING_WHITESPACE_RE = re.compile(r'[ \t]+$', flags=re.M)
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ASM_SCRUB_SHUFFLES_RE = (
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re.compile(
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r'^(\s*\w+) [^#\n]+#+ ((?:[xyz]mm\d+|mem) = .*)$',
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flags=re.M))
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ASM_SCRUB_SP_RE = re.compile(r'\d+\(%(esp|rsp)\)')
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ASM_SCRUB_RIP_RE = re.compile(r'[.\w]+\(%rip\)')
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ASM_SCRUB_KILL_COMMENT_RE = re.compile(r'^ *#+ +kill:.*\n')
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def scrub_asm(asm):
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# Scrub runs of whitespace out of the assembly, but leave the leading
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# whitespace in place.
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asm = ASM_SCRUB_WHITESPACE_RE.sub(r' ', asm)
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# Expand the tabs used for indentation.
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asm = string.expandtabs(asm, 2)
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# Detect shuffle asm comments and hide the operands in favor of the comments.
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asm = ASM_SCRUB_SHUFFLES_RE.sub(r'\1 {{.*#+}} \2', asm)
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# Generically match the stack offset of a memory operand.
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asm = ASM_SCRUB_SP_RE.sub(r'{{[0-9]+}}(%\1)', asm)
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# Generically match a RIP-relative memory operand.
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asm = ASM_SCRUB_RIP_RE.sub(r'{{.*}}(%rip)', asm)
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# Strip kill operands inserted into the asm.
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asm = ASM_SCRUB_KILL_COMMENT_RE.sub('', asm)
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# Strip trailing whitespace.
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asm = ASM_SCRUB_TRAILING_WHITESPACE_RE.sub(r'', asm)
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return asm
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def main():
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('-v', '--verbose', action='store_true',
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help='Show verbose output')
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parser.add_argument('--llc-binary', default='llc',
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help='The "llc" binary to use to generate the test case')
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parser.add_argument(
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'--function', help='The function in the test file to update')
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parser.add_argument('tests', nargs='+')
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args = parser.parse_args()
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run_line_re = re.compile('^\s*;\s*RUN:\s*(.*)$')
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ir_function_re = re.compile('^\s*define\s+(?:internal\s+)?[^@]*@(\w+)\s*\(')
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asm_function_re = re.compile(
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r'^_?(?P<f>[^:]+):[ \t]*#+[ \t]*@(?P=f)\n[^:]*?'
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r'(?P<body>^##?[ \t]+[^:]+:.*?)\s*'
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r'^\s*(?:[^:\n]+?:\s*\n\s*\.size|\.cfi_endproc|\.globl|\.comm|\.(?:sub)?section)',
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flags=(re.M | re.S))
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check_prefix_re = re.compile('--check-prefix=(\S+)')
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check_re = re.compile(r'^\s*;\s*([^:]+?)(?:-NEXT|-NOT|-DAG|-LABEL)?:')
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autogenerated_note = ('; NOTE: Assertions have been autogenerated by '
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'utils/update_llc_test_checks.py')
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for test in args.tests:
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if args.verbose:
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print >>sys.stderr, 'Scanning for RUN lines in test file: %s' % (test,)
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with open(test) as f:
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test_lines = [l.rstrip() for l in f]
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run_lines = [m.group(1)
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for m in [run_line_re.match(l) for l in test_lines] if m]
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if args.verbose:
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print >>sys.stderr, 'Found %d RUN lines:' % (len(run_lines),)
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for l in run_lines:
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print >>sys.stderr, ' RUN: ' + l
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checks = []
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for l in run_lines:
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(llc_cmd, filecheck_cmd) = tuple([cmd.strip() for cmd in l.split('|', 1)])
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if not llc_cmd.startswith('llc '):
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print >>sys.stderr, 'WARNING: Skipping non-llc RUN line: ' + l
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continue
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if not filecheck_cmd.startswith('FileCheck '):
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print >>sys.stderr, 'WARNING: Skipping non-FileChecked RUN line: ' + l
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continue
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llc_cmd_args = llc_cmd[len('llc'):].strip()
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llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
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check_prefixes = [m.group(1)
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for m in check_prefix_re.finditer(filecheck_cmd)]
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if not check_prefixes:
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check_prefixes = ['CHECK']
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# FIXME: We should use multiple check prefixes to common check lines. For
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# now, we just ignore all but the last.
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checks.append((check_prefixes, llc_cmd_args))
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asm = {}
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for prefixes, _ in checks:
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for prefix in prefixes:
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asm.update({prefix: dict()})
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for prefixes, llc_args in checks:
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if args.verbose:
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print >>sys.stderr, 'Extracted LLC cmd: llc ' + llc_args
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print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
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raw_asm = llc(args, llc_args, test)
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# Build up a dictionary of all the function bodies.
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for m in asm_function_re.finditer(raw_asm):
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if not m:
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continue
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f = m.group('f')
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f_asm = scrub_asm(m.group('body'))
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if f.startswith('stress'):
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# We only use the last line of the asm for stress tests.
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f_asm = '\n'.join(f_asm.splitlines()[-1:])
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if args.verbose:
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print >>sys.stderr, 'Processing asm for function: ' + f
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for l in f_asm.splitlines():
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print >>sys.stderr, ' ' + l
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for prefix in prefixes:
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if f in asm[prefix] and asm[prefix][f] != f_asm:
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if prefix == prefixes[-1]:
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print >>sys.stderr, ('WARNING: Found conflicting asm under the '
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'same prefix: %r!' % (prefix,))
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else:
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asm[prefix][f] = None
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continue
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asm[prefix][f] = f_asm
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is_in_function = False
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is_in_function_start = False
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prefix_set = set([prefix for prefixes, _ in checks for prefix in prefixes])
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if args.verbose:
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print >>sys.stderr, 'Rewriting FileCheck prefixes: %s' % (prefix_set,)
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fixed_lines = []
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fixed_lines.append(autogenerated_note)
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for l in test_lines:
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if is_in_function_start:
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if l.lstrip().startswith(';'):
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m = check_re.match(l)
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if not m or m.group(1) not in prefix_set:
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fixed_lines.append(l)
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continue
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# Print out the various check lines here
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printed_prefixes = []
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for prefixes, _ in checks:
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for prefix in prefixes:
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if prefix in printed_prefixes:
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break
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if not asm[prefix][name]:
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continue
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if len(printed_prefixes) != 0:
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fixed_lines.append(';')
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printed_prefixes.append(prefix)
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fixed_lines.append('; %s-LABEL: %s:' % (prefix, name))
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asm_lines = asm[prefix][name].splitlines()
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fixed_lines.append('; %s: %s' % (prefix, asm_lines[0]))
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for asm_line in asm_lines[1:]:
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fixed_lines.append('; %s-NEXT: %s' % (prefix, asm_line))
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break
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is_in_function_start = False
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if is_in_function:
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# Skip any blank comment lines in the IR.
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if l.strip() == ';':
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continue
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# And skip any CHECK lines. We'll build our own.
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m = check_re.match(l)
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if m and m.group(1) in prefix_set:
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continue
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# Collect the remaining lines in the function body and look for the end
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# of the function.
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fixed_lines.append(l)
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if l.strip() == '}':
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is_in_function = False
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continue
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if l == autogenerated_note:
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continue
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fixed_lines.append(l)
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m = ir_function_re.match(l)
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if not m:
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continue
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name = m.group(1)
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if args.function is not None and name != args.function:
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# When filtering on a specific function, skip all others.
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continue
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is_in_function = is_in_function_start = True
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if args.verbose:
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print>>sys.stderr, 'Writing %d fixed lines to %s...' % (
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len(fixed_lines), test)
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with open(test, 'wb') as f:
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f.writelines([l + '\n' for l in fixed_lines])
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if __name__ == '__main__':
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main()
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