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Re: i686 (PentiumPro) Optimizer Bug
- To: Hans dot Dolfing at home dot ivm dot de, egcs-bugs at cygnus dot com
- Subject: Re: i686 (PentiumPro) Optimizer Bug
- From: N8TM at aol dot com
- Date: Tue, 17 Nov 1998 21:47:09 EST
- Cc: ghh at mpq dot mpg dot de
In a message dated 11/17/98 3:29:32 PM Pacific Standard Time,
Hans.Dolfing@home.ivm.de writes:
> problems with -march=pentiumpro are a real
> showstopper
> for me. I hope the other two bug reports & testcases I contributed on
> i686 problems (with -mieee-fp and '-march=pentiumpro -O2 -funroll-loops'
> combinations (Nov06)) are helpful to track down the problem :)
The problems I've seen occur already with just '-march=pentiumpro -Os' which
would be an extremely useful basic option if it worked, as it does with the
1.1 and prerelease compilers. In most of my tests, 'march=pentiumpro -malign-
double -Os -funroll-loops' is the fastest running option, so I too am
interested in seeing it work reliably. I don't use enable-haifa except where
it's the default, and I use gnu binutils which accept the p6 instructions.