[gcc(refs/users/meissner/heads/work096)] Update ChangeLog.meissner.

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

https://gcc.gnu.org/g:1d8907484246602c8ddc52300e778e88aaeb1be6

commit 1d8907484246602c8ddc52300e778e88aaeb1be6
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Aug 1 18:12:37 2022 -0400

    Update ChangeLog.meissner.
    
    2022-08-01   Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * ChangeLog.meissner: Update.

Diff:
---
 gcc/ChangeLog.meissner | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 7549ae1606b..d0f8a782cc1 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,3 +1,29 @@
+==================== work096, patch 1.
+
+Do not enable -mblock-ops-vector-pair.
+
+Testing has shown that using the load vector pair and store vector pair
+instructions for block moves has some performance issues on power10.
+
+A patch on June 11th modified the code so that GCC would not set
+-mblock-ops-vector-pair by default if we are tuning for power10, but it
+would set the option if we were tuning for a different machine and have
+load and store vector pair instructions enabled.
+
+This patch eliminates the code setting -mblock-ops-vector-pair.  If you
+want to generate load vector pair and store vector pair instructions for
+block moves, you must use -mblock-ops-vector-pair.
+
+
+2022-08-01   Michael Meissner  <meissner@linux.ibm.com>
+
+gcc/
+
+	* config/rs6000/rs6000.cc (rs6000_option_override_internal): Remove
+	code setting -mblock-ops-vector-pair.
+
+==================== work096, create branch.
+
 2022-08-01   Michael Meissner  <meissner@linux.ibm.com>
 
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