[PATCH][s390]: Fix the usage of store_bit_field in the backend.

[Tamar Christina via Gcc-patches]

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.

--- inline copy of patch -- 
diff --git a/gcc/config/s390/s390.cc b/gcc/config/s390/s390.cc
index 
444b1ec20d768d829ab19a41f114a91119335e00..5aaf76a94908c4d8f09aca5ac64ef3a418615b9e
 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,




-- 

diff --git a/gcc/config/s390/s390.cc b/gcc/config/s390/s390.cc
index 
444b1ec20d768d829ab19a41f114a91119335e00..5aaf76a94908c4d8f09aca5ac64ef3a418615b9e
 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,