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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: "marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 12 Jan 2015 08:56:11 +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
Martin LiÅka <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #1 from Martin LiÅka <marxin at gcc dot gnu.org> ---
Problem is hidden in flag_var_tracking_assignments, which is set to false.
Thus, MAY_HAVE_DEBUG_INSNS is set to false. Unfortunately, Firefox contains
couple of third party libraries that have -g as a default option. So that DCE
after a statements removal does not remove debug statements that use result of
a statement and verifier fails.
Martin