[PATCH, i386]: Update processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags

[Gopalasubramanian, Ganesh]

Thank you Uros for the patch. Could you backport this to the 4.8.0?

-----Original Message-----
From: Uros Bizjak [mailto:ubizjak@gmail.com] 
Sent: Wednesday, May 15, 2013 11:16 PM
To: gcc-patches@gcc.gnu.org
Cc: Gopalasubramanian, Ganesh
Subject: [PATCH, i386]: Update processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags

Hello!

Attached patch adds missing PTA_PRFCHW and PTA_FXSR flags to x86 processor alias table. PRFCHW CPUID flag is shared with 3dnow prefetch flag, so some additional logic is needed to avoid generating SSE prefetches for non-SSE 3dNow! targets, while still generating full set of 3dnow prefetches on 3dNow! targets.

2013-05-15  Uros Bizjak  <ubizjak@gmail.com>

    * config/i386/i386.c (iy86_option_override_internal): Update
    processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags.  Add
    PTA_POPCNT to corei7 entry and remove PTA_SSE from athlon-4 entry.
    Do not enable SSE prefetch on non-SSE 3dNow! targets.  Enable
    TARGET_PRFCHW for TARGET_3DNOW targets.
    * config/i386/i386.md (prefetch): Enable for TARGET_PRFCHW instead
    of TARGET_3DNOW.
    (*prefetch_3dnow): Enable for TARGET_PRFCHW only.

Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu {,-m32}  and was committed to mainline SVN. The patch will be backported to 4.8 branch in a couple of days.

Uros.