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* [Bug tree-optimization/59262] __attribute__ ((optimize())) broken (and corrupts optimization of the whole compilation unit)
[not found] <bug-59262-4@http.gcc.gnu.org/bugzilla/>
@ 2013-11-23 14:00 ` mpolacek at gcc dot gnu.org
2013-11-25 9:23 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2013-11-23 14:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59262
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
__attribute__ ((optimize (""))) is not suited for this; its purpose is mostly
for debugging.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/59262] __attribute__ ((optimize())) broken (and corrupts optimization of the whole compilation unit)
[not found] <bug-59262-4@http.gcc.gnu.org/bugzilla/>
2013-11-23 14:00 ` [Bug tree-optimization/59262] __attribute__ ((optimize())) broken (and corrupts optimization of the whole compilation unit) mpolacek at gcc dot gnu.org
@ 2013-11-25 9:23 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-11-25 9:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59262
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
More specifically we cannot inline across changes of -ffast-math as that would
generate wrong-code. Thus the non-fast-math 'sum' cannot be inlined
into a fast-math annotated function. Which then of course defeats
vectorization.
Generally I'd advise against using the optimize attribute.
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-59262-4@http.gcc.gnu.org/bugzilla/>
2013-11-23 14:00 ` [Bug tree-optimization/59262] __attribute__ ((optimize())) broken (and corrupts optimization of the whole compilation unit) mpolacek at gcc dot gnu.org
2013-11-25 9:23 ` rguenth at gcc dot gnu.org
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