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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/106785] ICE in fail, at selftest.cc:47 since r13-2266-g8bb1df032cc080
Date: Wed, 31 Aug 2022 15:11:54 +0000	[thread overview]
Message-ID: <bug-106785-4-ojntOglYml@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-106785-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106785

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, __builtin_nan ("") == xxx is always false even with
-fno-finite-math-only,
including NaN == NaN, that is how floating point equality comparisons are
defined.
But, e.g. with -ffinite-math-only, we fold __builtin_isinf (x) or
__builtin_isnan (x) to 0 (maybe with the exception if you use __builtin_nan
("") as its operand?; but that just shows that it is UB if NaNs or Infs can
appear at runtime).

  parent reply	other threads:[~2022-08-31 15:11 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-31 11:01 [Bug rtl-optimization/106785] New: " marxin at gcc dot gnu.org
2022-08-31 11:18 ` [Bug rtl-optimization/106785] " aldyh at gcc dot gnu.org
2022-08-31 11:30 ` aldyh at gcc dot gnu.org
2022-08-31 11:33 ` aldyh at gcc dot gnu.org
2022-08-31 12:28 ` aldyh at gcc dot gnu.org
2022-08-31 12:41 ` jakub at gcc dot gnu.org
2022-08-31 13:12 ` aldyh at gcc dot gnu.org
2022-08-31 13:21 ` [Bug tree-optimization/106785] " aldyh at gcc dot gnu.org
2022-08-31 15:11 ` jakub at gcc dot gnu.org [this message]
2022-09-01  7:09 ` cvs-commit at gcc dot gnu.org
2022-09-01  7:12 ` aldyh at gcc dot gnu.org

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