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* [Bug tree-optimization/38209] branch optimisation generates worse code
[not found] <bug-38209-4@http.gcc.gnu.org/bugzilla/>
@ 2021-07-26 20:22 ` pinskia at gcc dot gnu.org
2022-11-19 22:43 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-26 20:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38209
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
Status|NEW |ASSIGNED
Severity|normal |enhancement
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine.
if (val_2(D) != 0)
goto <bb 3>; [INV]
else
goto <bb 4>; [INV]
<bb 3> :
val_4 = ~val_2(D);
<bb 4> :
# val_1 = PHI <val_4(3), 255(2)>
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/38209] branch optimisation generates worse code
[not found] <bug-38209-4@http.gcc.gnu.org/bugzilla/>
2021-07-26 20:22 ` [Bug tree-optimization/38209] branch optimisation generates worse code pinskia at gcc dot gnu.org
@ 2022-11-19 22:43 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-11-19 22:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38209
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
Status|ASSIGNED |RESOLVED
Known to work| |12.1.0
Resolution|--- |FIXED
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed for GCC 12 by r12-5699-gde3e5aae6c4b540e8
Specifically this part:
X != C1 ? ~X : C2 simplifies to ~X when ~C1 == C2.
which is the BIT_NOT_EXPR analog of the NEGATE_EXPR case.
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-38209-4@http.gcc.gnu.org/bugzilla/>
2021-07-26 20:22 ` [Bug tree-optimization/38209] branch optimisation generates worse code pinskia at gcc dot gnu.org
2022-11-19 22:43 ` pinskia at gcc dot gnu.org
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