[Bug target/80834] PowerPC gcc -mcpu=power9 seems to turn off vectorization that -mcpu=power8 enables

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80834

Michael Meissner <meissner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |NEW
   Last reconfirmed|                            |2017-05-19
         Resolution|INVALID                     |---
     Ever confirmed|0                           |1

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
I guess it is late on a Friday, and I mixed up compilers or options.

I verified that with subversion id 248266 that compiling the attachment with
-mcpu=power9 -O3 -ffast-math DOES NOT generate vector instructions, while
compiling it with -mcpu=power8 -O3 -ffast-math DOES generate vector
instructions.

It also does not generate vector instructions when using the -mcpu=power7 -O3
-ffast-math option.