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From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/111435] New: [14 Regression] gimple_zero_one_valued_p() infinite recursion Date: Sat, 16 Sep 2023 19:54:02 +0000 [thread overview] Message-ID: <bug-111435-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111435 Bug ID: 111435 Summary: [14 Regression] gimple_zero_one_valued_p() infinite recursion Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: slyfox at gcc dot gnu.org Target Milestone: --- Created attachment 55911 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55911&action=edit tree-ssa-loop-niter.cc.cc.gz Noticed on i686-linux gcc bootstrap when building r14-4077-g86451305d8b2a2. Reproduced on x86_64-linux -m32 as well. r14-4038-gb975c0dc3be285 looks suspicious. The reduction is a bit slow. Attaching partially reduced. How to crash: $ gcc/xg++ -Bgcc ~/dev/bugs/gcc-14-i686-ICE/tree-ssa-loop-niter.cc.cc -O2 -m32 --verbose Or: $ gcc/cc1plus -quiet -imultilib . -iprefix /tmp/gb/gcc/../lib/gcc/x86_64-pc-linux-gnu/14.0.0/ -isystem gcc/include -isystem gcc/include-fixed -D_GNU_SOURCE /home/slyfox/dev/bugs/gcc-14-i686-ICE/tree-ssa-loop-niter.cc.cc -quiet -dumpdir a- -dumpbase tree-ssa-loop-niter.cc.cc -dumpbase-ext .cc -m32 -mtune=generic -march=x86-64 -O2 -version -o /run/user/1000/ccgZ63HD.s GNU C++17 (GCC) version 14.0.0 20230916 (experimental) (x86_64-pc-linux-gnu) compiled by GNU C version 14.0.0 20230916 (experimental), GMP version 6.3.0, MPFR version 4.2.1, MPC version 1.3.1, isl version isl-0.20-GMP GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: 7c2c55b6bcbe18476b6d2c66d34ac4cc Segmentation fault (core dumped) Backtrace: Program received signal SIGSEGV, Segmentation fault. 0x000000000150a239 in get_nonzero_bits (name=0x7fffe8c02240) at /home/slyfox/dev/git/gcc/gcc/tree-ssanames.cc:494 494 unsigned int precision = element_precision (TREE_TYPE (name)); (gdb) bt #0 0x000000000150a239 in get_nonzero_bits (name=0x7fffe8c02240) at /home/slyfox/dev/git/gcc/gcc/tree-ssanames.cc:494 #1 0x000000000150ad4c in get_nonzero_bits (name=<optimized out>) at /home/slyfox/dev/git/gcc/gcc/tree-ssanames.cc:489 #2 0x0000000000f04105 in tree_nonzero_bits (t=t@entry=0x7fffe8c02240) at /home/slyfox/dev/git/gcc/gcc/fold-const.cc:16792 #3 0x00000000021de3ce in gimple_zero_one_valued_p (t=0x7fffe8c02240, valueize=valueize@entry=0x14a18c0 <rpo_vn_valueize(tree_node*)>) at gimple-match-3.cc:19 #4 0x00000000021de537 in gimple_zero_one_valued_p (t=0x7fffe8c02090, valueize=valueize@entry=0x14a18c0 <rpo_vn_valueize(tree_node*)>) at gimple-match-3.cc:70 #5 0x00000000021de537 in gimple_zero_one_valued_p (t=0x7fffe8c02240, valueize=valueize@entry=0x14a18c0 <rpo_vn_valueize(tree_node*)>) at gimple-match-3.cc:70 #6 0x00000000021de537 in gimple_zero_one_valued_p (t=0x7fffe8c02090, valueize=valueize@entry=0x14a18c0 <rpo_vn_valueize(tree_node*)>) at gimple-match-3.cc:70 ...
next reply other threads:[~2023-09-16 19:54 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-09-16 19:54 slyfox at gcc dot gnu.org [this message] 2023-09-16 19:55 ` [Bug tree-optimization/111435] " pinskia at gcc dot gnu.org 2023-09-16 19:59 ` pinskia at gcc dot gnu.org 2023-09-16 20:08 ` pinskia at gcc dot gnu.org 2023-09-16 21:37 ` slyfox at gcc dot gnu.org 2023-09-16 21:47 ` pinskia at gcc dot gnu.org 2023-09-16 21:54 ` pinskia at gcc dot gnu.org 2023-09-16 22:28 ` pinskia at gcc dot gnu.org 2023-09-17 1:45 ` pinskia at gcc dot gnu.org 2023-09-17 9:02 ` pinskia at gcc dot gnu.org 2023-09-17 10:50 ` slyfox at gcc dot gnu.org 2023-09-17 16:06 ` pinskia at gcc dot gnu.org 2023-09-18 8:33 ` jakub at gcc dot gnu.org 2023-09-18 20:45 ` cvs-commit at gcc dot gnu.org 2023-09-18 20:47 ` pinskia at gcc dot gnu.org 2023-09-19 0:15 ` pinskia at gcc dot gnu.org 2023-09-20 2:12 ` pinskia at gcc dot gnu.org
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