[gcc(refs/users/meissner/heads/work134-vsubreg)] Allow OOmode to tie with 128-bit vector modes.

[gcc(refs/users/meissner/heads/work134-vsubreg)] Allow OOmode to tie with 128-bit vector modes.

[Michael Meissner]

https://gcc.gnu.org/g:14dcdd097870195fb2a1dfdfcdb4adbfb4ed5db9

commit 14dcdd097870195fb2a1dfdfcdb4adbfb4ed5db9
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Sep 21 15:09:13 2023 -0400

    Allow OOmode to tie with 128-bit vector modes.
    
    2023-09-21  Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            PR target/109116
            * gcc/config/rs6000/rs6000.cc (rs6000_modes_tieable_p): Make OOmdoe
            tieable with 128-bit vector modes.

Diff:
---
 gcc/config/rs6000/rs6000.cc | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 4bfc62d930b..c1bce790dda 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -1964,13 +1964,13 @@ rs6000_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
 static bool
 rs6000_modes_tieable_p (machine_mode mode1, machine_mode mode2)
 {
-  if (mode1 == PTImode || mode1 == OOmode || mode1 == XOmode
-      || mode2 == PTImode || mode2 == OOmode || mode2 == XOmode)
+  if (mode1 == PTImode || mode1 == XOmode
+      || mode2 == PTImode || mode2 == XOmode)
     return mode1 == mode2;
 
-  if (ALTIVEC_OR_VSX_VECTOR_MODE (mode1))
-    return ALTIVEC_OR_VSX_VECTOR_MODE (mode2);
-  if (ALTIVEC_OR_VSX_VECTOR_MODE (mode2))
+  if (mode1 == OOmode || ALTIVEC_OR_VSX_VECTOR_MODE (mode1))
+    return (mode2 == OOmode || ALTIVEC_OR_VSX_VECTOR_MODE (mode2));
+  if (mode2 == OOmode || ALTIVEC_OR_VSX_VECTOR_MODE (mode2))
     return false;
 
   if (SCALAR_FLOAT_MODE_P (mode1))