[gcc(refs/users/meissner/heads/work158-future)] Enable using vector pair load/store for -mcpu=future

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:7cc485a833dc474a9e2940cc2f0fd1567fb3f46f

commit 7cc485a833dc474a9e2940cc2f0fd1567fb3f46f
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Feb 15 15:10:21 2024 -0500

    Enable using vector pair load/store for -mcpu=future
    
    Late in the development of power10, we discovered that there were some issues
    in using load vector pair and store vector pair instructions to do memory
    copies, so the defaults were modified to not use these instructions.  This
    patch re-enables using load and store vector pair instructions.
    
    Previously the -mblock-ops-vector-pair switch was not set in POWERPC_MASKS.
    This means the option was not reset if the cpu was changed via target
    attributes or targt pragmas.  I added this mask to POWERPC_MASKS since the
    option is set via -mcpu=future.
    
    2024-02-15  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS_SERVER): Turn on
            -mblock-ops-vector-pair for -mcpu=future.
            (POWERPC_MASKS): Add -mblock-ops-vector-pair.

Diff:
---
 gcc/config/rs6000/rs6000-cpus.def | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def
index a47075f8249e..ed934e0213e5 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -90,6 +90,7 @@
 
 /* Flags for a potential future processor that may or may not be delivered.  */
 #define ISA_FUTURE_MASKS_SERVER	(ISA_3_1_MASKS_SERVER			\
+				 | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR	\
 				 | OPTION_MASK_FUTURE)
 
 /* Flags that need to be turned off if -mno-power9-vector.  */
@@ -127,6 +128,7 @@
 
 /* Mask of all options to set the default isa flags based on -mcpu=<xxx>.  */
 #define POWERPC_MASKS		(OPTION_MASK_ALTIVEC			\
+				 | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR	\
 				 | OPTION_MASK_CMPB			\
 				 | OPTION_MASK_CRYPTO			\
 				 | OPTION_MASK_DFP			\