[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780
--- Comment #12 from Alexander Monakov ---
Eh, that commit sneakily changed avx2 tuning without explaining that in the
Changelog. Anyway, it should possible to "workaround" that by compiling with
-O2 -mavx2 -mtune=skylake-avx512
instead, in which case the bisect will likely point to commit
r12-2666-g29f0e955c97 ("x86: Update piecewise move and store") (before that,
expansion of memcpy via store-by-pieces wouldn't use avx2).
Also, PR 109093 looks very related.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #11 from Martin Liška --- (In reply to Alexander Monakov from comment #10) > (In reply to Martin Liška from comment #9) > > Started with zen tuning revision r13-4839-geef81eefcdc2a5. > > The issue is also reproducible with -march=haswell or -march=skylake, so you > can use those for further bisection. With -march=skylake it began with r13-4124-g156f523f9582f1 and with -march=haswell it started with the very same revision.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #10 from Alexander Monakov --- (In reply to Martin Liška from comment #9) > Started with zen tuning revision r13-4839-geef81eefcdc2a5. The issue is also reproducible with -march=haswell or -march=skylake, so you can use those for further bisection.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 Martin Liška changed: What|Removed |Added CC||marxin at gcc dot gnu.org --- Comment #9 from Martin Liška --- Started with zen tuning revision r13-4839-geef81eefcdc2a5.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #8 from David Binderman --- As far as the snapshots go, 20221218..20221225 seems to be the range. In git, this is g:fd69977febf399d1992bbf8d66ae9170e0a4dc9f .. g:febb58d28bfa4b544ec7ffec2d61f46d25205ff0, which is 123 commits. Trying g:89ba8366fe12fd2d04535c99ba67f33d7e305132.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #7 from David Binderman --- (In reply to David Binderman from comment #6) > Broken at 20230205, so range is now [20221106.. 20230205]. > > Trying snapshot 20221218 That was good, so range is 20221218..20230108. Trying snapshot 20230101.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #6 from David Binderman --- Broken at 20230205, so range is now [20221106.. 20230205]. Trying snapshot 20221218
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #5 from David Binderman --- Seems good at date 20221106, so the date range is [20221106..20230417]. Trying 20230205.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #4 from David Binderman --- Seems good with g:18547874ee205d83 dated 20220515 and bad with g:73f7109ffb159302, dated yesterday.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 Richard Biener changed: What|Removed |Added Status|UNCONFIRMED |NEW Keywords||needs-bisection Target||x86_64-*-* Version|unknown |14.0 Last reconfirmed||2023-05-09 Ever confirmed|0 |1
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 Alexander Monakov changed: What|Removed |Added CC||amonakov at gcc dot gnu.org --- Comment #3 from Alexander Monakov --- Works with -fstack-reuse=none. Somehow GCC is confused about stack layout in func_36. It leaves rsp misaligned by 8 mod 16, but computes the base of l_814 for __builtin_memset (_814, 0, 80) as if rsp is aligned mod 16.
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 --- Comment #2 from Andrew Pinski --- I should mention there is no difference in the gimple dump between with and without -march=znver1 .
[Bug target/109780] csmith: runtime crash with -O2 -march=znver1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780 Andrew Pinski changed: What|Removed |Added Component|middle-end |target --- Comment #1 from Andrew Pinski --- => 0x00402378 :vmovdqa %xmm3,(%r8) 0x0040237d :vmovdqa %xmm2,0x10(%r8) 0x00402383 :neg%r9 0x00402386 :vmovdqa %xmm2,0x20(%r8) End of assembler dump. (gdb) p $r8 $1 = 140737488346408 (gdb) p/x $r8 $2 = 0x7fffdd28
