[src/trunk]: src/external/gpl3/gcc/dist/gcc/config/rs6000 Cherry-pick upstrea...

[rin <rin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/58059b8c7121
branches:  trunk
changeset: 983232:58059b8c7121
user:      rin <rin%NetBSD.org@localhost>
date:      Tue May 11 01:47:20 2021 +0000

description:
Cherry-pick upstream fix for GCC10 regression to -misel option.

Assembler codes generated by GCC are identical with that of our local
fix in rev 1.26 for 32-bit processors, and no significant changes for
64-bit processors also.

master: https://gcc.gnu.org/g:6156df483fa50a08f561b6c248819f2992aa380d
gcc-10: https://gcc.gnu.org/g:5f665c1ca452673e9812cd92b07bd31441c0ac5b
(diffs are same)

commit r12-9-g6156df483fa50a08f561b6c248819f2992aa380d
Author: Segher Boessenkool <segher%kernel.crashing.org@localhost>
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@localhost>

            PR target/100108
            * config/rs6000/rs6000.c (rs6000_machine_from_flags): Do not consider
            OPTION_MASK_ISEL.

diffstat:

 external/gpl3/gcc/dist/gcc/config/rs6000/rs6000.c |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff -r d18f150efb33 -r 58059b8c7121 external/gpl3/gcc/dist/gcc/config/rs6000/rs6000.c
--- a/external/gpl3/gcc/dist/gcc/config/rs6000/rs6000.c Tue May 11 01:39:09 2021 +0000
+++ b/external/gpl3/gcc/dist/gcc/config/rs6000/rs6000.c Tue May 11 01:47:20 2021 +0000
@@ -5550,7 +5550,7 @@
   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";