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* [Bug c++/111759] New: __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used.
@ 2023-10-10 13:44 Zahira.Ammarguellat at intel dot com
2023-10-10 13:54 ` [Bug c++/111759] " pinskia at gcc dot gnu.org
2023-10-10 13:58 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: Zahira.Ammarguellat at intel dot com @ 2023-10-10 13:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111759
Bug ID: 111759
Summary: __FLT_HAS_INFINITY__ has value 1 even when
-ffinite-math-only is used.
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Zahira.Ammarguellat at intel dot com
Target Milestone: ---
Not sure if this is a bug but would like community feedback.
In https://godbolt.org/z/fqMdqfM7n we see that __FLT_HAS_INFINITY__ is set to 1
even when -ffast-math and -ffinite-math-only are used. Shouldn't this be set to
0 in presence of these options?
In limits header:
static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __FLT_HAS_INFINITY__;
That means the value of std::numeric_limits<float>::has_infinity will always be
1 even with -ffast-math and -ffinite-math-only. See
https://godbolt.org/z/M6W6Ejc7W
Is this acceptable?
Any feedback appreciated.
Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/111759] __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used.
2023-10-10 13:44 [Bug c++/111759] New: __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used Zahira.Ammarguellat at intel dot com
@ 2023-10-10 13:54 ` pinskia at gcc dot gnu.org
2023-10-10 13:58 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-10-10 13:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111759
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is basically a dup of bug 84949
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/111759] __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used.
2023-10-10 13:44 [Bug c++/111759] New: __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used Zahira.Ammarguellat at intel dot com
2023-10-10 13:54 ` [Bug c++/111759] " pinskia at gcc dot gnu.org
@ 2023-10-10 13:58 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-10-10 13:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111759
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Yes this is a dup. There is talk about infinite there too.
*** This bug has been marked as a duplicate of bug 84949 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-10-10 13:44 [Bug c++/111759] New: __FLT_HAS_INFINITY__ has value 1 even when -ffinite-math-only is used Zahira.Ammarguellat at intel dot com
2023-10-10 13:54 ` [Bug c++/111759] " pinskia at gcc dot gnu.org
2023-10-10 13:58 ` pinskia at gcc dot gnu.org
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