[gcc r13-1582] [PATCH][s390]: Fix the usage of store_bit_field in the backend.

[Jeff Law <law@gcc.gnu.org>]

https://gcc.gnu.org/g:84ff566c63cde517c7d963a554e338531fb059f1

commit r13-1582-g84ff566c63cde517c7d963a554e338531fb059f1
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Fri Jul 8 21:54:44 2022 -0400

    [PATCH][s390]: Fix the usage of store_bit_field in the backend.
    
    Hi All,
    
    I seem to have broken the s390 bootstrap because I added a new parameter to the
    store_bit_field function to indicate whether the value the field of is being set
    is currently undefined.
    
    If it's undefined we use a subreg instead.  In this case the value of false
    restores the old behavior.
    
    Ok for master?
    
    Thanks,
    Tamar
    
    gcc/ChangeLog:
    
            * config/s390/s390.cc (s390_expand_atomic): Pass false to store_bit_field to
            indicate that the value is not undefined.

Diff:
---
 gcc/config/s390/s390.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/s390/s390.cc b/gcc/config/s390/s390.cc
index 444b1ec20d7..5aaf76a9490 100644
--- a/gcc/config/s390/s390.cc
+++ b/gcc/config/s390/s390.cc
@@ -7468,7 +7468,7 @@ s390_expand_atomic (machine_mode mode, enum rtx_code code,
     case SET:
       if (ac.aligned && MEM_P (val))
 	store_bit_field (new_rtx, GET_MODE_BITSIZE (mode), 0,
-			 0, 0, SImode, val, false);
+			 0, 0, SImode, val, false, false);
       else
 	{
 	  new_rtx = expand_simple_binop (SImode, AND, new_rtx, ac.modemaski,