Make ipa-reference bitmaps dense

[Jan Hubicka]

> On Wed, Oct 23, 2019 at 08:20:12PM +0200, Jan Hubicka wrote:
> > Hi,
> > this is variant of patch I comitted.  It additionally register variable
> > removal hook to be sure that we do not mix up the static variable for
> > some other decl allocated later.
> > 
> > Bootstrapped/regtested x86_64
> 
> This doesn't build.  Completely untested patch to unbreak it is below,
> though not sure if it is enough.

Sorry, I managed to patch one tree and build different tree. I am
testing similar fix and will commmit it soon.

Honza
> 
> --- gcc/ipa-reference.c.jj	2019-10-23 20:38:01.392850897 +0200
> +++ gcc/ipa-reference.c	2019-10-23 20:56:17.006239699 +0200
> @@ -436,9 +436,9 @@ propagate_bits (ipa_reference_global_var
>  static void
>  varpool_removal_hook (varpool_node *node, void *)
>  {
> -  int *id = ipa_reference_vars_map->get (node->decl)
> +  int *id = ipa_reference_vars_map->get (node->decl);
>    if (id)
> -    ipa_reference_vars_map->remove (*id);
> +    ipa_reference_vars_map->remove (node->decl);
>  }
>  
>  static bool ipa_init_p = false;
> @@ -455,7 +455,6 @@ ipa_init (void)
>  
>    vec_alloc (reference_vars_to_consider, 10);
>  
> -
>    if (ipa_ref_opt_sum_summaries != NULL)
>      {
>        delete ipa_ref_opt_sum_summaries;
> @@ -1051,7 +1050,6 @@ ipa_reference_write_optimization_summary
>  	}
>      }
>  
> -
>    if (ltrans_statics_bitcount)
>      for (i = 0; i < lto_symtab_encoder_size (encoder); i++)
>        {
> @@ -1291,7 +1289,7 @@ ipa_reference_c_finalize (void)
>        ipa_ref_opt_sum_summaries = NULL;
>        delete ipa_reference_vars_map;
>        ipa_reference_vars_map = NULL;
> -      symtab->remove_varpool_removal_hook (varpool_node_hooks)
> +      symtab->remove_varpool_removal_hook (varpool_node_hooks);
>      }
>  
>    if (ipa_init_p)
> 
> 
> 	Jakub
>