replace [...]_write_pc methods by pc_regnum gdbarch value?

[Joel Brobecker <brobecker at adacore dot com>]

In the following tdep files...
   - m32r-tdep.c
   - mep-tdep.c

... the unit defines a _write_pc gdbarch method which simply calls
regcache_cooked_write_unsigned with the appropriate PC regnum.
It seems to me that setting the pc_regnum gdbarch value would
be sufficient. See attached diff.

I cannot test the changes, but if people agree, I don't mind checking
it in.

gdb/ChangeLog:

        * m32r-tdep.c (m32r_write_pc): Delete.
        (m32r_gdbarch_init): Remove call to set_gdbarch_write_pc.
        Add call to set_gdbarch_pc_regnum.

gdb/ChangeLog:

        * mep-tdep.c (mep_write_pc): Delete.
        (mep_gdbarch_init): Remove call to set_gdbarch_write_pc.
        Add call to set_gdbarch_pc_regnum.

-- 
Joel

diff --git a/gdb/m32r-tdep.c b/gdb/m32r-tdep.c
index ad752ce..d96ebed 100644
--- a/gdb/m32r-tdep.c
+++ b/gdb/m32r-tdep.c
@@ -667,12 +667,6 @@ m32r_read_pc (struct regcache *regcache)
   return pc;
 }
 
-static void
-m32r_write_pc (struct regcache *regcache, CORE_ADDR val)
-{
-  regcache_cooked_write_unsigned (regcache, M32R_PC_REGNUM, val);
-}
-
 static CORE_ADDR
 m32r_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
 {
@@ -927,10 +921,10 @@ m32r_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   gdbarch = gdbarch_alloc (&info, tdep);
 
   set_gdbarch_read_pc (gdbarch, m32r_read_pc);
-  set_gdbarch_write_pc (gdbarch, m32r_write_pc);
   set_gdbarch_unwind_sp (gdbarch, m32r_unwind_sp);
 
   set_gdbarch_num_regs (gdbarch, M32R_NUM_REGS);
+  set_gdbarch_pc_regnum (gdbarch, M32R_PC_REGNUM);
   set_gdbarch_sp_regnum (gdbarch, M32R_SP_REGNUM);
   set_gdbarch_register_name (gdbarch, m32r_register_name);
   set_gdbarch_register_type (gdbarch, m32r_register_type);
diff --git a/gdb/mep-tdep.c b/gdb/mep-tdep.c
index 3d91773..692c0c1 100644
--- a/gdb/mep-tdep.c
+++ b/gdb/mep-tdep.c
@@ -1125,13 +1125,6 @@ mep_read_pc (struct regcache *regcache)
   return pc;
 }
 
-static void
-mep_write_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  regcache_cooked_write_unsigned (regcache, MEP_PC_REGNUM, pc);
-}
-
-
 static enum register_status
 mep_pseudo_cr32_read (struct gdbarch *gdbarch,
                       struct regcache *regcache,
@@ -2470,8 +2463,8 @@ mep_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   /* Register set.  */
   set_gdbarch_read_pc (gdbarch, mep_read_pc);
-  set_gdbarch_write_pc (gdbarch, mep_write_pc);
   set_gdbarch_num_regs (gdbarch, MEP_NUM_RAW_REGS);
+  set_gdbarch_pc_regnum (gdbarch, MEP_PC_REGNUM);
   set_gdbarch_sp_regnum (gdbarch, MEP_SP_REGNUM);
   set_gdbarch_register_name (gdbarch, mep_register_name);
   set_gdbarch_register_type (gdbarch, mep_register_type);