[gcc(refs/users/meissner/heads/work134-vsubreg)] Update ChangeLog.vsubreg

[Michael Meissner]

https://gcc.gnu.org/g:393e903139ee1f2377b1bc10564e2961152e715f

commit 393e903139ee1f2377b1bc10564e2961152e715f
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Sep 21 23:23:25 2023 -0400

    Update ChangeLog.vsubreg

Diff:
---
 gcc/ChangeLog.vsubreg | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/gcc/ChangeLog.vsubreg b/gcc/ChangeLog.vsubreg
index d54bfa75550..ffa2c0882c5 100644
--- a/gcc/ChangeLog.vsubreg
+++ b/gcc/ChangeLog.vsubreg
@@ -1,3 +1,19 @@
+==================== Branch work134-vsubreg, patch #204 ====================
+
+Use simplify_gen_subreg instead of generating direct register number.
+
+2023-09-15  Michael Meissner  <meissner@linux.ibm.com>
+
+gcc/
+
+	* config/rs6000/rs6000.cc (split_unary_vector_pair): Use
+	simplify_gen_subreg instead of generating hard registers.
+	(split_binary_vector_pair): Likewise.
+	(split_fma_vector_pair): Likewise.
+	* config/rs6000/vector-pair.md (vpair_zero): Use simplify_gen_subreg
+	instead of generating hard registers.
+	(vpair_get_vector_<vp_pmode>): Likewise.
+
 ==================== Branch work134-vsubreg, patch #203 ====================
 
 Peter's patch for updating tieable support.