Add option to force filetype=asm for testing

pydir/crosstest_generator.py

Index: pydir/crosstest_generator.py
diff --git a/pydir/crosstest_generator.py b/pydir/crosstest_generator.py
index ef32a080b677a23a00bffaf450859e2df58a2b0f..9336535582de2f9f425d777b10ad903b26d68040 100755
--- a/pydir/crosstest_generator.py
+++ b/pydir/crosstest_generator.py
@@ -104,6 +104,8 @@ def main():
                          help='Generate files for lit testing')
   argparser.add_argument('--toolchain-root', dest='toolchain_root',
                            help='Path to toolchain binaries.')
+  argparser.add_argument('--filetype', default=None, dest='filetype',
+                         help='File type for compilation {asm, iasm, obj}.')
   args = argparser.parse_args()
 
   # Run from the crosstest directory to make it easy to grab inputs.
@@ -149,6 +151,8 @@ def main():
                 attr=attr)
               extra = (tests.get(test, 'flags').split(' ')
                        if tests.has_option(test, 'flags') else [])
+              if args.filetype:
+                extra += ['--filetype={ftype}'.format(ftype=args.filetype)]
               # Generate the compile command.
               cmp_cmd = (
                 ['{path}/crosstest.py'.format(path=pypath),