[Bug target/126959] -march=znver4 prefers load from memory for mask register

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126959

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2026-08-20
                 CC|                            |rguenth at gcc dot gnu.org

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This

diff --git a/gcc/config/i386/x86-tune-costs.h
b/gcc/config/i386/x86-tune-costs.h
index bc3bb694349..7574cc4f1ad 100644
--- a/gcc/config/i386/x86-tune-costs.h
+++ b/gcc/config/i386/x86-tune-costs.h
@@ -2119,7 +2119,7 @@ struct processor_costs znver4_cost = {
   8, 8,             /* mask->integer and integer->mask moves */
   {6, 6, 6},           /* cost of loading mask register
                  in QImode, HImode, SImode.  */
-  {8, 8, 8},           /* cost if storing mask register
+  {6, 6, 6},           /* cost if storing mask register
                  in QImode, HImode, SImode.  */
   2,             /* cost of moving mask register.  */
   /* End of register allocator costs.  */

fixes the issue.  Richard, can you check if it is OK on znver4?