code optimizers (was Re: induction

[mccaugh at uiucdcsm.UUCP]

 Just for the record:
 1) Having extensively used FTN-IV-G along with assembler programs, I can
    safely say that the "G" version was not the "optimized" FORTRAN;

 2) On the other hand, the "H" version was definitely optimized: unlike
    many compilers of its vintage (which were very memory-conscious), the
    "H"-optimizer bothered to keep the entire parse-tree intact for optimi-
    zation, which accounts for its particular success as a FTN-optimizer
    (the more info at your disposal -- even at the expense of memory -- the
    better position you are in to generate "optimal" code). For more details,
    consult "Compiler Construction for Digital Computers" by David Gries (2nd
    edition -- most readable if you speak IBM-360).