diff options
Diffstat (limited to 'emcc')
| -rwxr-xr-x | emcc | 29 |
1 files changed, 21 insertions, 8 deletions
@@ -129,18 +129,18 @@ Most normal gcc/g++ options will work, for example: Options that are modified or new in %s include: -O0 No optimizations (default) -O1 Simple optimizations, including asm.js, LLVM -O1 - optimizations, and no runtime assertions + optimizations, relooping, and no runtime assertions or C++ exception catching (to re-enable C++ exception catching, use - -s DISABLE_EXCEPTION_CATCHING=0 ). - (For details on the affects of different - opt levels, see apply_opt_level() in - tools/shared.py and also src/settings.js.) - -O2 As -O1, plus the relooper (loop recreation), - LLVM -O3 optimizations, and + -s DISABLE_EXCEPTION_CATCHING=0 ), and enables -s ALIASING_FUNCTION_POINTERS=1 + (For details on the affects of different + opt levels, see apply_opt_level() in + tools/shared.py and also src/settings.js.) + -O2 As -O1, plus various js-level optimizations and + LLVM -O3 optimizations -O3 As -O2, plus dangerous optimizations that may break the generated code! This adds @@ -258,6 +258,9 @@ Options that are modified or new in %s include: try adjusting JAVA_HEAP_SIZE in the environment (for example, to 4096m for 4GB). + Note: Closure is only run if js opts are being + done (-O2 or above, or --js-opts 1). + --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 @@ -933,7 +936,7 @@ try: if default_cxx_std: newargs = newargs + [default_cxx_std] - if js_opts is None: js_opts = opt_level >= 1 + if js_opts is None: js_opts = opt_level >= 2 if llvm_opts is None: llvm_opts = LLVM_OPT_LEVEL[opt_level] if llvm_lto is None and opt_level >= 3: llvm_lto = 3 if opt_level == 0: debug_level = 4 @@ -1105,6 +1108,16 @@ try: shared.Settings.CORRECT_OVERFLOWS = 1 assert not shared.Settings.PGO, 'cannot run PGO in ASM_JS mode' + heap = 4096 + while heap < shared.Settings.TOTAL_MEMORY: + if heap <= 16*1024*1024: + heap *= 2 + else: + heap += 16*1024*1024 + if heap != shared.Settings.TOTAL_MEMORY: + logging.warning('increasing TOTAL_MEMORY to %d to be more reasonable for asm.js' % heap) + shared.Settings.TOTAL_MEMORY = heap + if shared.Settings.CORRECT_SIGNS >= 2 or shared.Settings.CORRECT_OVERFLOWS >= 2 or shared.Settings.CORRECT_ROUNDINGS >= 2: debug_level = 4 # must keep debug info to do line-by-line operations |