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[Bug tree-optimization/71845] [7 Regression] ICE: use-after-free in (anonymous namespace)::pass_pre::execute
- 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, 11 Jul 2016 19:39:51 +0000
- Subject: [Bug tree-optimization/71845] [7 Regression] ICE: use-after-free in (anonymous namespace)::pass_pre::execute
- Auto-submitted: auto-generated
- References: <bug-71845-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71845
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-07-11
CC| |marxin at gcc dot gnu.org
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r238078:
commit e1bba98001be7ab89d5734ae0fdfe3996b4281a7
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Jul 7 07:43:35 2016 +0000
2016-07-07 Richard Biener <rguenther@suse.de>
* tree-ssa-pre.c: Include alias.h.
(compute_avail): If we have multiple VN_REFERENCEs with the
same hashtable entry adjust that to make it a valid replacement
for all of them with respect to alignment and aliasing
when doing insertion.
* tree-ssa-sccvn.h (vn_reference_operands_for_lookup): Declare.
* tree-ssa-sccvn.c (vn_reference_operands_for_lookup): New function.
valgrind backtrace points to:
==5358== Invalid read of size 8
==5358== at 0x109E890: compute_avail() (tree-ssa-pre.c:3811)
==5358== by 0x10A1E25: (anonymous namespace)::pass_pre::execute(function*)
(tree-ssa-pre.c:4846)
==5358== by 0xD86076: execute_one_pass(opt_pass*) (passes.c:2344)
==5358== by 0xD863AC: execute_pass_list_1(opt_pass*) (passes.c:2428)
==5358== by 0xD863DD: execute_pass_list_1(opt_pass*) (passes.c:2429)
==5358== by 0xD86435: execute_pass_list(function*, opt_pass*)
(passes.c:2439)
==5358== by 0x99321D: cgraph_node::expand() (cgraphunit.c:1983)
==5358== by 0x993853: expand_all_functions() (cgraphunit.c:2119)
==5358== by 0x99436C: symbol_table::compile() (cgraphunit.c:2475)
==5358== by 0x99459D: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2565)
==5358== by 0xE9DB48: compile_file() (toplev.c:490)
==5358== by 0xEA0079: do_compile() (toplev.c:1998)