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* [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP)
[not found] <bug-18940-4@http.gcc.gnu.org/bugzilla/>
@ 2021-12-25 22:56 ` pinskia at gcc dot gnu.org
2021-12-25 22:59 ` pinskia at gcc dot gnu.org
2023-08-07 7:55 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-25 22:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=18940
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |NEW
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is mostly fixed on the trunk.
What is left is:
# RANGE [1, 1073741823] NONZERO 1073741823
D1360_10 = n_9(D) >> 1;
...
# RANGE [4, 4294967292] NONZERO 4294967295
_18 = D1360_10 > 0 ? _19 : 4;
Notice how we have the range for D1360_10 but then don't optimize the COND_EXPR
....
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP)
[not found] <bug-18940-4@http.gcc.gnu.org/bugzilla/>
2021-12-25 22:56 ` [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP) pinskia at gcc dot gnu.org
@ 2021-12-25 22:59 ` pinskia at gcc dot gnu.org
2023-08-07 7:55 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-25 22:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=18940
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks|53947 |26731
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Notice how we have the range for D1360_10 but then don't optimize the
> COND_EXPR ....
Which is the same problem as I mentioned in PR 26731.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26731
[Bug 26731] Jump threading gets in the way of loops
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP)
[not found] <bug-18940-4@http.gcc.gnu.org/bugzilla/>
2021-12-25 22:56 ` [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP) pinskia at gcc dot gnu.org
2021-12-25 22:59 ` pinskia at gcc dot gnu.org
@ 2023-08-07 7:55 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-07 7:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=18940
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |13.0
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 13.
DOM3 now optimizes it:
Optimizing statement _17 = D1360_10 > 0;
LKUP STMT _17 = D1360_10 gt_expr 0
2>>> STMT _17 = D1360_10 gt_expr 0
LKUP STMT D1360_10 le_expr 1
Optimizing statement _16 = (unsigned int) D1360_10;
LKUP STMT _16 = nop_expr D1360_10
2>>> STMT _16 = nop_expr D1360_10
Optimizing statement niters.3_18 = _17 ? _16 : 1;
Replaced '_17' with constant '1'
Registering value_relation (_16 pe32 D1360_10) (bb3) at _16 = (unsigned int)
D1360_10;
Applying pattern match.pd:4437, gimple-match.cc:176249
gimple_simplified to niters.3_18 = _16;
Folded to: niters.3_18 = _16;
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-08-07 7:55 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-12-25 22:56 ` [Bug tree-optimization/18940] Loop is not vectorized when it should be (VRP) pinskia at gcc dot gnu.org
2021-12-25 22:59 ` pinskia at gcc dot gnu.org
2023-08-07 7:55 ` pinskia at gcc dot gnu.org
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