gdb: move some variables to an inner scope in save_waitstatus

These two variables:

      struct regcache *regcache = get_thread_regcache (tp);
      const address_space *aspace = regcache->aspace ();

are only needed inside the "if".  Getting a thread's regcache is a
somewhat expensive operation, so it's good to avoid it if not necessary.
Move the variable declarations and their initialization to the "if"
scope.

gdb/ChangeLog:

	* infrun.c (save_waitstatus): Move variables to inner scope.

Change-Id: Ief1463728755b4dcc142c0a0a76896e9d594ae84

1 files changed, 2 insertions, 3 deletions

diff --git a/gdb/infrun.c b/gdb/infrun.c
index cfec079..90bab8d 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -4703,12 +4703,11 @@ save_waitstatus (struct thread_info *tp, const target_waitstatus *ws)
   tp->suspend.waitstatus = *ws;
   tp->suspend.waitstatus_pending_p = 1;
 
-  struct regcache *regcache = get_thread_regcache (tp);
-  const address_space *aspace = regcache->aspace ();
-
   if (ws->kind == TARGET_WAITKIND_STOPPED
       && ws->value.sig == GDB_SIGNAL_TRAP)
     {
+      struct regcache *regcache = get_thread_regcache (tp);
+      const address_space *aspace = regcache->aspace ();
       CORE_ADDR pc = regcache_read_pc (regcache);
 
       adjust_pc_after_break (tp, &tp->suspend.waitstatus);