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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113959] New: Optimize `__builtin_isnan(x) ||
 __builtin_isinf(x)` to `__builtin_isfinite(x)`
Date: Fri, 16 Feb 2024 14:16:12 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
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X-Bugzilla-Who: antoshkka at gmail dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113959

            Bug ID: 113959
           Summary: Optimize `__builtin_isnan(x) || __builtin_isinf(x)` to
                    `__builtin_isfinite(x)`
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antoshkka at gmail dot com
  Target Milestone: ---

Sometimes people check for finite number using `__builtin_isnan(x) ||
__builtin_isinf(x)`. However `__builtin_isfinite(x)` produces a better
assembly.

Please, add the optimization.

Godbolt playground: https://godbolt.org/z/5r38169fn=