Added %NeverOptimize runtime call that can disable optimizations for a method for tests.

test/mjsunit/regress/regress-mul-canoverflowb.js

Index: test/mjsunit/regress/regress-mul-canoverflowb.js
diff --git a/test/mjsunit/regress/regress-mul-canoverflow.js b/test/mjsunit/regress/regress-mul-canoverflowb.js
similarity index 98%
copy from test/mjsunit/regress/regress-mul-canoverflow.js
copy to test/mjsunit/regress/regress-mul-canoverflowb.js
index e3e21caec8f96d118273491d0f34d88b957ecf50..2332e94ad06d0e50e14f440622b8a002518ac622 100644
--- a/test/mjsunit/regress/regress-mul-canoverflow.js
+++ b/test/mjsunit/regress/regress-mul-canoverflowb.js
@@ -31,7 +31,7 @@ function boom(a) {
   return ((a | 0) * (a | 0)) | 0;
 }
 function boom_unoptimized(a) {
-  try {} catch(_) {}
+  %NeverOptimize();
   return ((a | 0) * (a | 0)) | 0;
 }