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* [Bug middle-end/44612] -flto -fwhole-program: Never read variable not optimized away [not found] <bug-44612-4@http.gcc.gnu.org/bugzilla/> @ 2020-08-31 9:31 ` burnus at gcc dot gnu.org 2021-12-22 10:21 ` [Bug ipa/44612] " pinskia at gcc dot gnu.org 1 sibling, 0 replies; 2+ messages in thread From: burnus at gcc dot gnu.org @ 2020-08-31 9:31 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44612 --- Comment #8 from Tobias Burnus <burnus at gcc dot gnu.org> --- For what it is worth, still occurs with on mainline (GCC 11). (In reply to Richard Biener from comment #6) > Confirmed. > > DSE doesn't remove memset or memcpy calls. > > We also do not have a flag to mark functions only clobbering local or > incoming memory (thus effectively not have side-effects if the argument > reachable memory is unused after a call). (In reply to Jakub Jelinek from comment #7) > Well, RTL DSE to some extent knows about memset. > And, for tree DSE handling it would be much easier and desirable. ^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug ipa/44612] -flto -fwhole-program: Never read variable not optimized away [not found] <bug-44612-4@http.gcc.gnu.org/bugzilla/> 2020-08-31 9:31 ` [Bug middle-end/44612] -flto -fwhole-program: Never read variable not optimized away burnus at gcc dot gnu.org @ 2021-12-22 10:21 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 2+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-12-22 10:21 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44612 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement CC| |marxin at gcc dot gnu.org Component|middle-end |ipa ^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-44612-4@http.gcc.gnu.org/bugzilla/>
2020-08-31 9:31 ` [Bug middle-end/44612] -flto -fwhole-program: Never read variable not optimized away burnus at gcc dot gnu.org
2021-12-22 10:21 ` [Bug ipa/44612] " pinskia at gcc dot gnu.org
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