re PR bootstrap/43681 (bootstrap fails with "unused" var message for an apparently...

	PR bootstrap/43681
	* expr.c (block_move_libcall_safe_for_call_parm): Avoid
	set but not used variable warning.

From-SVN: r158111

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 94860fa..b221b55 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-04-08  Jakub Jelinek  <jakub@redhat.com>
+
+       PR bootstrap/43681
+       * expr.c (block_move_libcall_safe_for_call_parm): Avoid
+       set but not used variable warning.
+
 2010-04-08  Wei Guozhi  <carrot@google.com>
 
        PR target/41653

diff --git a/gcc/expr.c b/gcc/expr.c
index 1f04ffb..f5de2ae 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -1262,6 +1262,9 @@ block_move_libcall_safe_for_call_parm (void)
      an outgoing argument.  */
 #if defined (REG_PARM_STACK_SPACE)
   fn = emit_block_move_libcall_fn (false);
+  /* Avoid set but not used warning if *REG_PARM_STACK_SPACE doesn't
+     depend on its argument.  */
+  (void) fn;
   if (OUTGOING_REG_PARM_STACK_SPACE ((!fn ? NULL_TREE : TREE_TYPE (fn)))
       && REG_PARM_STACK_SPACE (fn) != 0)
     return false;