diff options
Diffstat (limited to 'emcc')
| -rwxr-xr-x | emcc | 19 |
1 files changed, 16 insertions, 3 deletions
@@ -161,9 +161,17 @@ Options that are modified or new in %s include: time in return for the smallest and fastest output. - -O3 As -O2, plus additional optimizations that can + -Os Like -O2 with extra optimizations for size. + + -Oz Like -Os but reduces code size further. + + -O3 Like -O2 plus additional JS optimizations that can take a significant amount of compilation time and/or - are relatively new. + are relatively new. Note that differs from -O2 only + during the bitcode to JS (final link + JS generation) + stage, as it is JS-specific, so you can run -Os + on your source files for example, and -O3 during + JS generation if you want. For tips on optimizing your code, see https://github.com/kripken/emscripten/wiki/Optimizing-Code @@ -810,8 +818,13 @@ try: # Let -O default to -O2, which is what gcc does. requested_level = newargs[i][2:] or '2' if requested_level == 's': + llvm_opts = ['-Os'] requested_level = 2 settings_changes.append('INLINING_LIMIT=50') + elif requested_level == 'z': + llvm_opts = ['-Oz'] + requested_level = 2 + settings_changes.append('INLINING_LIMIT=25') opt_level = validate_arg_level(requested_level, 3, 'Invalid optimization level: ' + newargs[i]) # We leave the -O option in place so that the clang front-end runs in that # optimization mode, but we disable the actual optimization passes, as we'll @@ -1353,7 +1366,7 @@ try: file_ending = filename_type_ending(input_file) if file_ending.endswith(SOURCE_ENDINGS): temp_file = temp_files[i] - logging.debug('optimizing %s with -O%s', input_file, llvm_opts) + logging.debug('optimizing %s', input_file) shared.Building.llvm_opt(temp_file, llvm_opts) # If we were just asked to generate bitcode, stop there |