disable asm validation when backend tells us

1 files changed, 2 insertions, 0 deletions

diff --git a/emscripten.py b/emscripten.py
index 5c9275c2..c8122cb9 100755
--- a/emscripten.py
+++ b/emscripten.py
@@ -824,6 +824,8 @@ def emscript_fast(infile, settings, outfile, libraries=[], compiler_engine=None,
   ) + map(lambda x: x[1:], metadata['externs'])
   if metadata['simd']:
     settings['SIMD'] = 1
+  if not metadata['canValidate'] and settings['ASM_JS'] != 2:
+    logging.warning('disabling asm.js validation due to use of non-supported features')
     settings['ASM_JS'] = 2
 
   # Save settings to a file to work around v8 issue 1579