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-rw-r--r--tools/js-optimizer.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/js-optimizer.js b/tools/js-optimizer.js
index 518e451a..e6b945a2 100644
--- a/tools/js-optimizer.js
+++ b/tools/js-optimizer.js
@@ -413,7 +413,7 @@ function simplifyExpressionsPre(ast) {
function simplifyBitops(ast) {
var USEFUL_BINARY_OPS = set('<<', '>>', '|', '&', '^');
- var SAFE_BINARY_OPS = set('+', '-', '*', '%'); // division is unsafe as it creates non-ints in JS
+ var SAFE_BINARY_OPS = set('+', '-', '*'); // division is unsafe as it creates non-ints in JS; mod is unsafe as signs matter so we can't remove |0's
var ZERO = ['num', 0];
var rerun = true;
while (rerun) {