Last Tuesday, we upgraded the T3D's MAX operating system from version 1.2.0.5 to version 1.3.0.2. This upgrade should be transparent, but you should recompile and relink all of your your T3D executables as it affects include and library files as well as kernel routines and the user environment. Here are the release contents for both MAX 1.3.0.0 and 1.3.0.2. It can provide this for either T3D or Y-MP compilations. It's nice to know how a compiler alters your code when it optimizes it.
Some optimizations reduce precision.
This was moderately satisfying, at best. The solution I found was to use f90. In f90, you can compile with the same flags for either T3D or Y-MP to get various human readable listing files. A loop starting at line 20 was vectorized. A loop starting at line 27 was vectorized.