Add Subzero to test scripts.

tools/toolchain_tester/torture_test.py

 #!/usr/bin/python
 # Copyright (c) 2013 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 ''' Installs and runs (a subset of) the gcc toolchain test suite against
 various nacl and non-nacl toolchains
 '''
 
 import glob
@@ skipping 74 matching lines @@
     print 'Unknown platform:', platform
 
   config_map = { 'pnacl': 'llvm_pnacl',
                  'naclgcc': 'nacl_gcc',
                  'localgcc': 'local_gcc'}
 
   failures = []
   if compiler == 'pnacl':
     # O3_O0 is clang -O3 followed by pnacl-translate -O0
     optmodes = ['O0', 'O3', 'O0_O0', 'O3_O0']
+    if platform == 'x86-32':
+      # Add some extra Subzero configurations.

[Jim Stichnoth, 2015/03/25 01:17:09]

This adds two new configurations, 50% more runtime.  Should we drop one of the
old configs, like O0_O0?

[jvoung (off chromium), 2015/03/25 18:41:38]

Maybe... but O0f_O2b might be the weirder config. On the other hand, it could
tickle weird optimization bugs in the backend from mixing O0/O2 which we may or
may not be interested in fixing.

O0f_O0b might be more representative of debugging.

[Jim Stichnoth, 2015/03/25 20:13:17]

OK.  For now, I just left a TODO about possible pruning.

+      optmodes.extend(['O3_sz', 'O3_O0_sz'])
   else:
     optmodes = ['O0', 'O3']
   for optmode in optmodes:
     # TODO: support an option like -k? For now, always keep going
     config = '_'.join((config_map[compiler], platform, optmode))
 
     # Test zero-cost C++ exception handling.
     retcode = eh_tests(status.context, config,
                        'known_eh_failures_' + compiler + '.txt', extra_args,
                        use_sjlj_eh=False)
@@ skipping 32 matching lines @@
     platform = sys.argv[2]
     tester_argv = sys.argv[3:]
   except IndexError:
     usage()
     sys.exit(1)
 
   return run_torture(status, compiler, platform, tester_argv)
 
 if __name__ == '__main__':
   sys.exit(main())