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* [Bug tree-optimization/56531] New: SLP load permutations cannot share the load between and inside SLP instances
@ 2013-03-05 9:53 rguenth at gcc dot gnu.org
2013-03-05 9:54 ` [Bug tree-optimization/56531] " rguenth at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-03-05 9:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56531
Bug #: 56531
Summary: SLP load permutations cannot share the load between
and inside SLP instances
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: missed-optimization, wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rguenth@gcc.gnu.org
Blocks: 56270
SLP load permutations are currently severely restricted (only 000..111... is
supported) and they do not share the load (ICE before the fix for PR56270).
This is because vinfo->vectorized_stmt of the underlying group load includes
the very first permutation of the very first SLP instance.
The fix here is to make vinfo->vectorized_stmt the group load itself and
hook in the permutation only on the consumer.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/56531] SLP load permutations cannot share the load between and inside SLP instances
2013-03-05 9:53 [Bug tree-optimization/56531] New: SLP load permutations cannot share the load between and inside SLP instances rguenth at gcc dot gnu.org
@ 2013-03-05 9:54 ` rguenth at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-03-05 9:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56531
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2013-03-05
Blocks| |53947
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-05 09:53:42 UTC ---
Mine.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-03-05 9:53 [Bug tree-optimization/56531] New: SLP load permutations cannot share the load between and inside SLP instances rguenth at gcc dot gnu.org
2013-03-05 9:54 ` [Bug tree-optimization/56531] " rguenth at gcc dot gnu.org
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