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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114326] Missed optimization for A || B when !B implies A. Date: Wed, 13 Mar 2024 19:06:27 +0000 [thread overview] Message-ID: <bug-114326-4-wvtXsnh5i7@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-114326-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114326 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Status|UNCONFIRMED |NEW Last reconfirmed| |2024-03-13 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- _1 = d1_5(D) ^ d2_6(D); _2 = _1 & 43981; _10 = d1_5(D) != d2_6(D); _11 = _2 == 0; _12 = _10 | _11; (d1 != d2) | ((d1 ^ d2) & CST) == 0) Confirmed. Obvious if the first part is false then d1 ^ d2 will be 0. This will work though maybe there is another place where this can be handled ... (simplify (bit_ior (ne@n4 @0 @1) (cmp (bit_and (bit_xor @0 @1) @2) @3)) (bit_ior @n4 (cmp { build_zero_cst (TREE_TYPE (@0)); } @3)) )
next prev parent reply other threads:[~2024-03-13 19:06 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-13 14:19 [Bug tree-optimization/114326] New: " manolis.tsamis at vrull dot eu 2024-03-13 19:06 ` pinskia at gcc dot gnu.org [this message] 2024-03-13 21:18 ` [Bug tree-optimization/114326] " ptomsich at gcc dot gnu.org 2024-03-13 21:41 ` pinskia at gcc dot gnu.org
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