[binutils-gdb] gdb: move some variables to an inner scope in save_waitstatus

[binutils-gdb] gdb: move some variables to an inner scope in save_waitstatus

[Simon Marchi]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=89ba430c6b4cba43a2e77fe9a103e26e6c96bc12

commit 89ba430c6b4cba43a2e77fe9a103e26e6c96bc12
Author: Simon Marchi <simon.marchi@polymtl.ca>
Date:   Thu Apr 29 10:16:28 2021 -0400

    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

Diff:
---
 gdb/ChangeLog | 4 ++++
 gdb/infrun.c  | 5 ++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f24075461b6..ea65327e6e0 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-29  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* infrun.c (save_waitstatus): Move variables to inner scope.
+
 2021-04-29  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* NEWS: Fix typo and stray full stop.
diff --git a/gdb/infrun.c b/gdb/infrun.c
index cfec07994f4..90bab8d984f 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);