i686 (PentiumPro) Optimizer Bug

[N8TM@aol.com]

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.