[gcc(refs/users/meissner/heads/work160)] Use vector pair load/store for memcpy with -mcpu=future

[gcc(refs/users/meissner/heads/work160)] Use vector pair load/store for memcpy with -mcpu=future

[Michael Meissner]

https://gcc.gnu.org/g:84a2fd5d954a9396b630061430f7bb7c36b75d80

commit 84a2fd5d954a9396b630061430f7bb7c36b75d80
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Feb 26 23:39:24 2024 -0500

    Use vector pair load/store for memcpy with -mcpu=future
    
    In the development for the power10 processor, GCC did not enable using the load
    vector pair and store vector pair instructions when optimizing things like
    memory copy.  This patch enables using those instructions if -mcpu=future is
    used.
    
    2024-02-26  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS_SERVER): Enable using
            load vector pair and store vector pair instructions for memory copy
            operations.
            (POWERPC_MASKS): Make the bit for enabling using load vector pair and
            store vector pair operations set and reset when the PowerPC processor is
            changed.

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 77170915615..8da1d560e49 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -92,6 +92,7 @@
 
 /* Flags for a potential future processor that may or may not be made.  */
 #define ISA_FUTURE_MASKS_SERVER	(ISA_POWER11_MASKS_SERVER               \
+				 | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR	\
 				 | OPTION_MASK_FUTURE)
 
 /* Flags that need to be turned off if -mno-vsx.  */
@@ -123,6 +124,7 @@
 
 /* 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			\