/OPTIMIZE[=(option[,...])]
       /NOOPTIMIZE

    Enables or disables optimization options. All options are enabled
    by default except VAXREGS.

    The options are:

    Option         Description

    [NO]PEEPHOLE   Peephole optimization
    [NO]SCHEDULE   Code scheduling
    [NO]ADDRESSES  Common base address loading
    [NO]REFERENCES Common data referencing
    ALL            All optimizations
    NONE           No optimizations