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[Bug middle-end/64498] [5 Regression] Cannot build Firefox with LTO: ICE in substitute_and_fold_dom_walker::before_dom_children
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 13 Jan 2015 12:34:42 +0000
- Subject: [Bug middle-end/64498] [5 Regression] Cannot build Firefox with LTO: ICE in substitute_and_fold_dom_walker::before_dom_children
- Auto-submitted: auto-generated
- References: <bug-64498-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64498
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> If the final result is -g0, then clearing flag_var_tracking_assignments is
> desirable, if the final result is -g and any of the inputs have debug stmts,
> then either you need to turn flag_var_tracking_assignments whenever any
> inputs
> has debug stmts, or remove the debug stmts if you want to keep it cleared.
I think this will properly happen when removing flag_var_tracking_assignments
from Optimization. The streamer drops all debug stmts at stream-in time
according to global flags.