diff options
Diffstat (limited to 'emcc')
| -rwxr-xr-x | emcc | 33 |
1 files changed, 26 insertions, 7 deletions
@@ -138,6 +138,20 @@ Options that are modified or new in %s include: generated code! --closure <on> 0: No closure compiler (default in -O0, -O1) 1: Run closure compiler (default in -O2, -O3) + --js-transform <cmd> <cmd> will be called on the generated code + before it is optimized. This lets you modify + the JavaScript, for example adding some code + or removing some code, in a way that those + modifications will be optimized together with + the generated code properly. <cmd> will be + called with the filename of the generated + code as a parameter; to modify the code, you + can read the original data and then append to + it or overwrite it with the modified data. + <cmd> is interpreted as a space-separated + list of arguments, for example, <cmd> of + "python processor.py" will cause a python + script to be run. The target file, if specified (-o <target>), defines what will be generated: @@ -254,6 +268,7 @@ try: opt_level = 0 llvm_opt_level = None closure = None + js_transform = None def check_bad_eq(arg): assert '=' not in arg, 'Invalid parameter (do not use "=" with "--" options)' @@ -277,6 +292,11 @@ try: closure = int(newargs[i+1]) newargs[i] = '' newargs[i+1] = '' + elif newargs[i].startswith('--js-transform'): + check_bad_eq(newargs[i]) + js_transform = newargs[i+1] + newargs[i] = '' + newargs[i+1] = '' elif newargs[i] == '-MF': # clang cannot handle this, so we fake it f = open(newargs[i+1], 'w') f.write('\n') @@ -461,15 +481,15 @@ try: print >> sys.stderr, 'emcc: saving intermediate processing steps to %s' % shared.EMSCRIPTEN_TEMP_DIR intermediate_counter = 0 - def save_intermediate(name=None): + def save_intermediate(name=None, suffix='js'): global intermediate_counter - shutil.copyfile(final, os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'emcc-%d%s.js' % (intermediate_counter, '' if name is None else '-' + name))) + shutil.copyfile(final, os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'emcc-%d%s.%s' % (intermediate_counter, '' if name is None else '-' + name, suffix))) intermediate_counter += 1 if not LEAVE_INPUTS_RAW: final = in_temp(target_basename + '.bc') final = shared.Building.llvm_dis(final, final + '.ll') - if DEBUG: save_intermediate('ll') + if DEBUG: save_intermediate('ll', 'll') else: assert len(input_files) == 1 final = input_files[0] @@ -478,12 +498,11 @@ try: if DEBUG: save_intermediate('original') # Apply a source code transformation, if requested - source_transform = os.environ.get('EMCC_JS_PROCESSOR') - if source_transform: - exec source_transform in locals() + if js_transform: shutil.copyfile(final, final + '.tr.js') final += '.tr.js' - process(final) + if DEBUG: print >> sys.stderr, 'emcc: applying transform: %s' % js_transform + Popen(js_transform.split(' ') + [os.path.abspath(final)]).communicate() if DEBUG: save_intermediate('transformed') if opt_level >= 1: |