[gnu.gcc] Optimization

navoceano%oacis.decnet@NORDA.ARPA ("OACIS::NAVOCEANO") (11/22/88)

  This is a cross-over from comp.sys.sun (sun-spots). I recently
posted a query that asked if any sun-spots readers had experience
with C compilers that did a better job of optimization than Sun's
compiler. Several responded that GNU C did a good job in this
department and the price is right.

I also asked about optimization of concurrency and alignment for
the 68020. This drew enough puzzled responses that I suspect that
I was asking the wrong question. I am trying to find out if
instruction scheduling is a valid or useful form of optimization
for the 68020. If so, is this planned for gcc?

Please c.c. to my address as I am not yet set up to receive
the newsgroup. Thanks,

					Don Newcomb
					Naval Oceanographic Office
					Stennis Space Center, MS
					(601) 688-5998
					navoceano%oacis.decnet@norda.arpa

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rms@WHEATIES.AI.MIT.EDU (Richard Stallman) (11/23/88)

I have heard rumors that insn scheduling is useful for 68881 insns
with the 68020, but GCC does not try to do this.
Someone is working on a portable scheduling pass; when it is done,
perhaps it will be reasonable to try this.