Re: Compiler problems with -O2 (was Re: CVS Trouble, even under 4.0-RELEASE (alpha) HELP!)

2000-03-23 Thread Ed Hall
Andrew Gallatin writes: : I take it the O2 bugs are not unique to us, but rather they are : generic across all OSes that gcc version 2.95.2 runs on? Do the gcc : people know these problems exist? Just FYI, the Linux kernel is compiled with: -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer

Re: Compiler problems with -O2 (was Re: CVS Trouble, even under 4.0-RELEASE (alpha) HELP!)

2000-03-22 Thread Chad R. Larson
>> I'm sorry, at best here we're talking a few tenths of a >> percentage point of increased speed (if that), and maybe a few >> milliseconds saved -- right? > > Actually the difference between -O and -O2 the times i've looked > at the generated code was substantial, but I guess that brings

Re: Compiler problems with -O2 (was Re: CVS Trouble, even under 4.0-RELEASE (alpha) HELP!)

2000-03-22 Thread David O'Brien
On Wed, Mar 22, 2000 at 03:03:09PM -0500, Howard Leadmon wrote: > want to avoid, or at least note the problem with -O2 as I have been using > that when making software on my Intel machines for a long time, so just > assumed it was OK to do the same on the Alpha.. It isn't officially OK from the

Re: Compiler problems with -O2 (was Re: CVS Trouble, even under 4.0-RELEASE(alpha) HELP!)

2000-03-22 Thread Howard Leadmon
Actually I have several Alpha's, and one I have to reload due to this, so I will give this a try on the other machine and will let you know if I have good success with it. If this all works, then I agree with you that we want to avoid, or at least note the problem with -O2 as I have been using