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[Bug target/84272] [8 Regression] AddressSanitizer: heap-use-after-free ../../gcc/config/aarch64/cortex-a57-fma-steering.c:519 in fma_node::get_parity()
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 08 Feb 2018 18:44:45 +0000
- Subject: [Bug target/84272] [8 Regression] AddressSanitizer: heap-use-after-free ../../gcc/config/aarch64/cortex-a57-fma-steering.c:519 in fma_node::get_parity()
- Auto-submitted: auto-generated
- References: <bug-84272-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84272
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43382
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43382&action=edit
gcc8-pr84272-2.patch
Or defer deletion of all the fma_nodes until the end, whether they are root or
not. I'd fear that even removing just non-root nodes might mean the following
processing of the children might still look at the parent nodes.
Untested as well. I'd appreciate feedback from the pass author.