Subzero: Delete szdiff.py tests and ERRORS tests.

pydir/szdiff.py

-#!/usr/bin/env python2
-
-import argparse
-import itertools
-import re
-
-if __name__ == '__main__':
-    """Compares a LLVM file with a subzero file for differences.
-
-    Before comparing, the LLVM file is massaged to remove comments,
-    blank lines, global variable definitions, external function
-    declarations, and possibly other patterns that llvm2ice does not
-    handle.
-
-    The subzero file and the massaged LLVM file are compared line by
-    line for differences.  However, there is a regex defined such that
-    if the regex matches a line in the LLVM file, that line and the
-    corresponding line in the subzero file are ignored.  This lets us
-    ignore minor differences such as inttoptr and ptrtoint, and
-    printing of floating-point constants.
-
-    On success, no output is produced.  On failure, each mismatch is
-    printed as two lines, one starting with 'SZ' (subzero) and one
-    starting with 'LL' (LLVM).
-    """
-    desc = 'Compare LLVM and subzero bitcode files.'
-    argparser = argparse.ArgumentParser(description=desc)
-    argparser.add_argument(
-        'llfile', nargs=1,
-        type=argparse.FileType('r'), metavar='LLVM_FILE',
-        help='LLVM bitcode file')
-    argparser.add_argument(
-        'szfile', nargs='?', default='-',
-        type=argparse.FileType('r'), metavar='SUBZERO_FILE',
-        help='Subzero bitcode file [default stdin]')
-    args = argparser.parse_args()
-    bitcode = args.llfile[0].readlines()
-    sz_out = [ line.rstrip() for line in args.szfile.readlines()]
-
-    # Filter certain lines and patterns from the input, and collect
-    # the remainder into llc_out.
-    llc_out = []
-    tail_call = re.compile(' tail call ');
-    trailing_comment = re.compile(';.*')
-    ignore_pattern = re.compile('|'.join([
-                '^ *$',     # all-whitespace lines
-                '^declare', # declarations without definitions
-                '^@.*\]$'   # PNaCl global declarations like:
-                            #   @v = external global [4 x i8]
-                ]))
-    prev_line = None
-    for line in bitcode:
-        if prev_line:
-            line = prev_line + line
-            prev_line = None
-        # Convert tail call into regular (non-tail) call.
-        line = tail_call.sub(' call ', line)
-        # Remove trailing comments and spaces.
-        line = trailing_comment.sub('', line).rstrip()
-        # Ignore blanks lines, forward declarations, and variable definitions.
-        if ignore_pattern.search(line):
-          continue
-        # SZ doesn't break up long lines, but LLVM does. Normalize to SZ.
-        if line.endswith(','):
-            prev_line = line
-            continue
-        llc_out.append(line)
-
-    # Compare sz_out and llc_out line by line, but ignore pairs of
-    # lines where the llc line matches a certain pattern.
-    return_code = 0
-    lines_total = 0
-    lines_diff = 0
-    ignore_pattern = re.compile(
-        '|'.join(['[ (](float|double) [-0-9]',  # FP constants
-                  '[ (](float|double) %\w+, [-0-9]',
-                  ' @llvm\..*i\d+\*',        # intrinsic calls w/ pointer args
-                  ' i\d+\* @llvm\.',         # intrinsic calls w/ pointer ret
-                  ' inttoptr ',              # inttoptr pointer types
-                  ' ptrtoint ',              # ptrtoint pointer types
-                  ' bitcast .*\* .* to .*\*' # bitcast pointer types
-                  ]))
-    for (sz_line, llc_line) in itertools.izip_longest(sz_out, llc_out):
-        lines_total += 1
-        if sz_line == llc_line:
-            continue
-        if llc_line and ignore_pattern.search(llc_line):
-            lines_diff += 1
-            continue
-        if sz_line: print 'SZ (%d)> %s' % (lines_total, sz_line)
-        if llc_line: print 'LL (%d)> %s' % (lines_total, llc_line)
-        return_code = 1
-
-    if return_code == 0:
-        message = 'Success (ignored %d diffs out of %d lines)'
-        print message % (lines_diff, lines_total)
-    exit(return_code)