[gcc r16-9455] rs6000: Add dense math register names in darwin.h

https://gcc.gnu.org/g:acea9c77d0f9ded41ec18006dd75097c7187248f

commit r16-9455-gacea9c77d0f9ded41ec18006dd75097c7187248f
Author: Avinash Jayakar <[email protected]>
Date:   Wed Jul 29 12:40:57 2026 +0530

    rs6000: Add dense math register names in darwin.h
    
    Darwin maintains a separate array of register_names where the Dense Math
    Registers were not added. This caused an ICE when building the darwin
    cross compiler as reported in PR126438. This patch adds dense math
    registers to the REGISTER_NAMES array to fix this issue.
    
    2026-07-29  Avinash Jayakar  <[email protected]>
    
    gcc/ChangeLog:
            PR target/126438
            * config/rs6000/darwin.h (REGISTER_NAMES): Add dmf registers.
    
    (cherry picked from commit e5587abccc1e0281ac85c37ca42faa97a4d0ea55)

Diff:
---
 gcc/config/rs6000/darwin.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h
index 4717fb0d336f..cdc3c2f56e1e 100644
--- a/gcc/config/rs6000/darwin.h
+++ b/gcc/config/rs6000/darwin.h
@@ -295,7 +295,9 @@
   /* cr0..cr7 */							\
     "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",		\
   /* vrsave vscr sfp */							\
-    "vrsave", "vscr", "sfp"						\
+    "vrsave", "vscr", "sfp",						\
+  /* DMRs */								\
+      "dm0", "dm1", "dm2", "dm3", "dm4", "dm5", "dm6", "dm7"	\
 }
 
 /* This outputs NAME to FILE.  */