Subzero: Strength-reduce mul by certain constants.

pydir/crosstest.py

 #!/usr/bin/env python2
 
 import argparse
 import os
 import subprocess
 import sys
 import tempfile
 
 from utils import shellcmd
 from utils import FindBaseNaCl
@@ skipping 22 matching lines @@
                            metavar='DRIVER',
                            help='Driver program')
     argparser.add_argument('--target', required=False, default='x8632',
                            choices=arch_map.keys(),
                            metavar='TARGET',
                            help='Translation target architecture.' +
                                 ' Default %(default)s.')
     argparser.add_argument('-O', required=False, default='2', dest='optlevel',
                            choices=['m1', '-1', '0', '1', '2'],
                            metavar='OPTLEVEL',
-                           help='Optimization level ' +
+                           help='Optimization level for llc and Subzero ' +
                                 '(m1 and -1 are equivalent).' +
                                 ' Default %(default)s.')
+    argparser.add_argument('--clang-opt', required=False, default=True,
+                           dest='clang_opt')
     argparser.add_argument('--mattr',  required=False, default='sse2',
                            dest='attr', choices=['sse2', 'sse4.1'],
                            metavar='ATTRIBUTE',
                            help='Target attribute. Default %(default)s.')
     argparser.add_argument('--sandbox', required=False, default=0, type=int,
                            dest='sandbox',
                            help='Use sandboxing. Default "%(default)s".')
     argparser.add_argument('--prefix', required=True,
                            metavar='SZ_PREFIX',
                            help='String prepended to Subzero symbol names')
@@ skipping 29 matching lines @@
             target=args.target, sb='sb' if args.sandbox else 'nat',
             opt=args.optlevel, attr=args.attr)
         base, ext = os.path.splitext(arg)
         if ext == '.ll':
             bitcode = arg
         else:
             # Use pnacl-clang and pnacl-opt to produce PNaCl bitcode.
             bitcode_nonfinal = os.path.join(args.dir, base + '.' + key + '.bc')
             bitcode = os.path.join(args.dir, base + '.' + key + '.pnacl.ll')
             shellcmd(['{bin}/pnacl-clang'.format(bin=bindir),
-                      '-O2', '-c', arg, '-o', bitcode_nonfinal])
+                      ('-O2' if args.clang_opt else '-O0'), '-c', arg,
+                      '-o', bitcode_nonfinal])
             shellcmd(['{bin}/pnacl-opt'.format(bin=bindir),
                       '-pnacl-abi-simplify-preopt',
                       '-pnacl-abi-simplify-postopt',
                       '-pnaclabi-allow-debug-metadata',
                       bitcode_nonfinal, '-S', '-o', bitcode])
 
         base_sz = '{base}.{key}'.format(base=base, key=key)
         asm_sz = os.path.join(args.dir, base_sz + '.sz.s')
         obj_sz = os.path.join(args.dir, base_sz + '.sz.o')
         obj_llc = os.path.join(args.dir, base_sz + '.llc.o')
@@ skipping 52 matching lines @@
     sb_native_args = (['-O0', '--pnacl-allow-native', '-arch', 'x8632',
                        '-Wn,-defsym=__Sz_AbsoluteZero=0']
                       if args.sandbox else
                       ['-g', '-m32', '-lm', '-lpthread',
                        '-Wl,--defsym=__Sz_AbsoluteZero=0'])
     shellcmd([compiler, args.driver] + objs +
              ['-o', os.path.join(args.dir, args.output)] + sb_native_args)
 
 if __name__ == '__main__':
     main()