[Bug ipa/100413] [11/12/13 Regression] ICE: failed to reclaim unneeded function with custom flags since r11-4267-g0e590b68fa374365
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed May 11 21:29:39 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100413
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Martin Jambor
<jamborm@gcc.gnu.org>:
https://gcc.gnu.org/g:988fbc636639621dadc5cecbe77aa3f9aefedefb
commit r12-8368-g988fbc636639621dadc5cecbe77aa3f9aefedefb
Author: Martin Jambor <mjambor@suse.cz>
Date: Wed May 11 23:25:40 2022 +0200
ipa: Release body of clone_of when removing its last clone (PR 100413)
In the PR, the verifier complains that we did not manage to remove the
body of a node and it is right. The node is kept for materialization
of two clones but after one is materialized, the other one is removed
as unneeded (as a part of delete_unreachable_blocks_update_callgraph).
The problem is that the node removal does not check for this situation
and can leave the clone_of node there with a body attached to it even
though there is no use for it any more. This patch does checks for it
and handles the situation in a simlar way that
cgraph_node::materialize_clone does it, except that it also has to be
careful that the removed node itself does not have any clones, which
would still need the clone_of's body. Failing to do that results in a
bootstrap failure.
gcc/ChangeLog:
2022-04-27 Martin Jambor <mjambor@suse.cz>
PR ipa/100413
* cgraph.cc (cgraph_node::remove): Release body of the node this
is clone_of if appropriate.
gcc/testsuite/ChangeLog:
2022-04-27 Martin Jambor <mjambor@suse.cz>
PR ipa/100413
* g++.dg/ipa/pr100413.C: New test.
(cherry picked from commit 27ee75dbe81bb781214c66a9e6a759c08b7deb60)
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