[gcc r10-9814] rs6000: Fix cpu selection w/ isel (PR100108)

[gcc r10-9814] rs6000: Fix cpu selection w/ isel (PR100108)

[Segher Boessenkool]

https://gcc.gnu.org/g:5f665c1ca452673e9812cd92b07bd31441c0ac5b

commit r10-9814-g5f665c1ca452673e9812cd92b07bd31441c0ac5b
Author: Segher Boessenkool <segher@kernel.crashing.org>
Date:   Tue Apr 20 12:00:50 2021 +0000

    rs6000: Fix cpu selection w/ isel (PR100108)
    
    There are various non-IBM CPUs with isel as well, so it is easiest if we
    just don't consider that flag here (it is not needed).
    
    2021-04-20  Segher Boessenkool  <segher@kernel.crashing.org>
    
            PR target/100108
            * config/rs6000/rs6000.c (rs6000_machine_from_flags): Do not consider
            OPTION_MASK_ISEL.
    
    (cherry picked from commit 6156df483fa50a08f561b6c248819f2992aa380d)

Diff:
---
 gcc/config/rs6000/rs6000.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index a6dc1156994..128e481e89c 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -5550,7 +5550,7 @@ rs6000_machine_from_flags (void)
   HOST_WIDE_INT flags = rs6000_isa_flags;
 
   /* Disable the flags that should never influence the .machine selection.  */
-  flags &= ~(OPTION_MASK_PPC_GFXOPT | OPTION_MASK_PPC_GPOPT);
+  flags &= ~(OPTION_MASK_PPC_GFXOPT | OPTION_MASK_PPC_GPOPT | OPTION_MASK_ISEL);
 
   if ((flags & (ISA_3_1_MASKS_SERVER & ~ISA_3_0_MASKS_SERVER)) != 0)
     return "power10";