Clean up run script to use for testing Subzero.

pydir/llvm2iceinsts.py

-#!/usr/bin/env python2
-
-import argparse
-import itertools
-import os
-import re
-import subprocess
-import sys
-
-from utils import shellcmd
-
-if __name__ == '__main__':
-    desc = 'Run llvm2ice on llvm file to produce ICE instructions.'
-    argparser = argparse.ArgumentParser(
-        description=desc,
-        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-        epilog='''
-        Runs in two modes, depending on whether the flag '--pnacl' is specified.
-
-        If flag '--pnacl' is omitted, it runs llvm2ice to (directly) generate
-        the corresponding ICE instructions.
-
-        If flag '--pnacl' is given, it first assembles and freezes the
-        llvm source file generating the corresponding PNaCl bitcode
-        file. The PNaCl bitcode file is then piped into llvm2ice to
-        generate the corresponding ICE instructions.
-        ''')
-    argparser.add_argument(
-        '--llvm2ice', required=False, default='./llvm2ice', metavar='LLVM2ICE',
-        help='Path to llvm2ice driver program')
-    argparser.add_argument('--llvm-bin-path', required=False,
-                           default=None, metavar='LLVM_BIN_PATH',
-                           help='Path to LLVM executables ' +
-                                '(for building PNaCl files)')
-    argparser.add_argument('--pnacl', required=False,
-                           action='store_true',
-                           help='Convert llvm source to PNaCl bitcode ' +
-                                'file first')
-    argparser.add_argument('--echo-cmd', required=False,
-                           action='store_true',
-                           help='Trace command that generates ICE instructions')
-    argparser.add_argument('llfile', nargs=1,
-                           metavar='LLVM_FILE',
-                           help='Llvm source file')
-
-    args = argparser.parse_args()
-    llvm_bin_path = args.llvm_bin_path
-    llfile = args.llfile[0]
-
-    cmd = []
-    if args.pnacl:
-      cmd = [os.path.join(llvm_bin_path, 'llvm-as'), llfile, '-o', '-', '|',
-             os.path.join(llvm_bin_path, 'pnacl-freeze'),
-             '--allow-local-symbol-tables', '|']
-    cmd += [args.llvm2ice, '-verbose', 'inst', '-notranslate']
-    if args.pnacl:
-      cmd += ['--allow-local-symbol-tables', '--bitcode-format=pnacl']
-    else:
-      cmd.append(llfile)
-
-    stdout_result = shellcmd(cmd, echo=args.echo_cmd)
-    if not args.echo_cmd:
-      sys.stdout.write(stdout_result)