diff options
| -rw-r--r-- | src/librustc_trans/back/write.rs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs index b717254ef0d..40a69721495 100644 --- a/src/librustc_trans/back/write.rs +++ b/src/librustc_trans/back/write.rs @@ -315,11 +315,15 @@ impl ModuleConfig { // Copy what clang does by turning on loop vectorization at O2 and // slp vectorization at O3. Otherwise configure other optimization aspects // of this pass manager builder. + // Turn off vectorization for emscripten, as it's not very well supported. self.vectorize_loop = !sess.opts.cg.no_vectorize_loops && (sess.opts.optimize == config::OptLevel::Default || - sess.opts.optimize == config::OptLevel::Aggressive); + sess.opts.optimize == config::OptLevel::Aggressive) && + !sess.target.target.options.is_like_emscripten; + self.vectorize_slp = !sess.opts.cg.no_vectorize_slp && - sess.opts.optimize == config::OptLevel::Aggressive; + sess.opts.optimize == config::OptLevel::Aggressive && + !sess.target.target.options.is_like_emscripten; self.merge_functions = sess.opts.optimize == config::OptLevel::Default || sess.opts.optimize == config::OptLevel::Aggressive; |