avoid allocating huge lists for [BIGNUM x type] types

1 files changed, 5 insertions, 0 deletions

diff --git a/src/runtime.js b/src/runtime.js
index 6839f556..fa127fe7 100644
--- a/src/runtime.js
+++ b/src/runtime.js
@@ -238,6 +238,11 @@ var Runtime = {
       prev = curr;
       return curr;
     });
+    if (type.name_[0] === '[') {
+      // arrays have 2 elements, so we get the proper difference. then we scale here. that way we avoid
+      // allocating a potentially huge array for [999999 x i8] etc.
+      type.flatSize = parseInt(type.name_.substr(1))*type.flatSize/2;
+    }
     type.flatSize = Runtime.alignMemory(type.flatSize, type.alignSize);
     if (diffs.length == 0) {
       type.flatFactor = type.flatSize;