fix registerize pass for float32

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/js-optimizer.js b/tools/js-optimizer.js
index cba31861..c69f7362 100644
--- a/tools/js-optimizer.js
+++ b/tools/js-optimizer.js
@@ -1930,7 +1930,7 @@ function registerize(ast) {
     // we just use a fresh register to make sure we avoid this, but it could be
     // optimized to check for safe registers (free, and not used in this loop level).
     var varRegs = {}; // maps variables to the register they will use all their life
-    var freeRegsClasses = asm ? [[], []] : []; // two classes for asm, one otherwise
+    var freeRegsClasses = asm ? [[], [], []] : []; // two classes for asm, one otherwise XXX - hardcoded length
     var nextReg = 1;
     var fullNames = {};
     var loopRegs = {}; // for each loop nesting level, the list of bound variables