Hi,
while compiling firefox I noticed that -fprofile-generage -flto goes to 8GB.
It turns out that this is caused by ipa_reference no longer being disabled
becaus in_lto_p became flag that is set later (it is not clear to me why it
needs to be this way).
I however do not see reason why not disable ipa-reference for non-lto path, too.
Bootstrapped/regtested x86_linux, comitted to mainline.
OK for 4.9.1?
Honza
Index: ChangeLog
===================================================================
--- ChangeLog (revision 209461)
+++ ChangeLog (working copy)
@@ -1,5 +1,10 @@
2014-04-16 Jan Hubicka <hubi...@ucw.cz>
+ * opts.c (common_handle_option): Disable -fipa-reference coorectly
+ with -fuse-profile.
+
+2014-04-16 Jan Hubicka <hubi...@ucw.cz>
+
* ipa-devirt.c (odr_type_d): Add field all_derivations_known.
(type_all_derivations_known_p): New predicate.
(type_all_ctors_visible_p): New predicate.
Index: opts.c
===================================================================
--- opts.c (revision 209461)
+++ opts.c (working copy)
@@ -1732,7 +1732,7 @@ common_handle_option (struct gcc_options
/* FIXME: Instrumentation we insert makes ipa-reference bitmaps
quadratic. Disable the pass until better memory representation
is done. */
- if (!opts_set->x_flag_ipa_reference && opts->x_in_lto_p)
+ if (!opts_set->x_flag_ipa_reference)
opts->x_flag_ipa_reference = false;
break;
