Re: PR target/52555: attribute optimize is overriding command line options

[Jakub Jelinek <jakub at redhat dot com>]

On Thu, Feb 21, 2013 at 11:02:56PM +0000, Steve Ellcey wrote:
> Have you gotten any reports of problems with this patch?  It seems to be sending cc1 into an infinite
> loop during the GCC testsuite for me.  I am testing the mips-mti-linux-gnu target and tests like
> gcc.target/mips/call-saved-1.c are causing cc1 to suck up all my memory and swap space before the
> test times out.
> 
> I will keep digging and see if I can figure out what is going on but I wanted to see if anyone else has
> reported this problem.

I think this should fix this (but totally untested except for
call-saved-1.c, and it doesn't make any sense to test on non-mips).

The problem I believe is that Aldy has changed init_optabs and insn-opinit.c
to use this_fn_optabs instead of this_target_optabs, but it is only set in
invoke_set_current_function_hook.  During save_target_globals we want to
init this_target_optabs, so we need to temporarily switch this_fn_optabs to
make that happen.

2013-02-22  Jakub Jelinek  <jakub@redhat.com>

	PR target/52555
	* target-globals.c (save_target_globals): For init_reg_sets and
	target_reinit remporarily set this_fn_optabs to this_target_optabs.

--- gcc/target-globals.c.jj	2013-02-19 07:40:03.000000000 +0100
+++ gcc/target-globals.c	2013-02-22 10:55:36.725435859 +0100
@@ -67,6 +67,7 @@ struct target_globals *
 save_target_globals (void)
 {
   struct target_globals *g;
+  struct target_optabs *saved_this_fn_optabs = this_fn_optabs;
 
   g = ggc_alloc_target_globals ();
   g->flag_state = XCNEW (struct target_flag_state);
@@ -86,8 +87,10 @@ save_target_globals (void)
   g->bb_reorder = XCNEW (struct target_bb_reorder);
   g->lower_subreg = XCNEW (struct target_lower_subreg);
   restore_target_globals (g);
+  this_fn_optabs = this_target_optabs;
   init_reg_sets ();
   target_reinit ();
+  this_fn_optabs = saved_this_fn_optabs;
   return g;
 }
 

	Jakub