properly overflow gep arguments; fixes #1975

1 files changed, 5 insertions, 1 deletions

diff --git a/src/parseTools.js b/src/parseTools.js
index 22e9b94c..cef25ed4 100644
--- a/src/parseTools.js
+++ b/src/parseTools.js
@@ -1640,7 +1640,10 @@ function getFastValue(a, op, b, type) {
 }
 
 function getFastValues(list, op, type) {
-  assert(op == '+');
+  assert(op === '+' && type === 'i32');
+  for (var i = 0; i < list.length; i++) {
+    if (isNumber(list[i])) list[i] = (list[i]|0) + '';
+  }
   var changed = true;
   while (changed) {
     changed = false;
@@ -1648,6 +1651,7 @@ function getFastValues(list, op, type) {
       var fast = getFastValue(list[i], op, list[i+1], type);
       var raw = list[i] + op + list[i+1];
       if (fast.length < raw.length || fast.indexOf(op) < 0) {
+        if (isNumber(fast)) fast = (fast|0) + '';
         list[i] = fast;
         list.splice(i+1, 1);
         i--;