This is the mail archive of the
mailing list for the GCC project.
Re: GCSE store motion
- From: dewar at gnat dot com (Robert Dewar)
- To: dberlin at dberlin dot org, mark at codesourcery dot com, roger at eyesopen dot com
- Cc: aj at suse dot de, davem at redhat dot com, gcc at gcc dot gnu dot org, rth at redhat dot com
- Date: Wed, 15 May 2002 15:29:29 -0400 (EDT)
- Subject: Re: GCSE store motion
< If the optimization makes the compiler go slower when compiling itself,
it ain't worth having.
I think that's much too harsh. For example a thorough job of software loop
pipelining using the rotating registers of the ia64 may require *quite*
a bit of compilation time, and since this optimization is unlikely to help
GCC itself much that seems unfortunate.
Perhaps a more appropriate rule is that this is the criterion for putting
an optimization in -O1.