https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Andrew Pinski changed:
What|Removed |Added
Severity|normal |enhancement
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Richard Biener changed:
What|Removed |Added
Target Milestone|11.2|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Jakub Jelinek changed:
What|Removed |Added
Target Milestone|11.0|11.2
--- Comment #8 from Jakub Jelinek
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Martin Liška changed:
What|Removed |Added
CC||marxin at gcc dot gnu.org
--- Comment #7
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Martin Liška changed:
What|Removed |Added
Status|ASSIGNED|NEW
Assignee|marxin at gcc dot
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Martin Liška changed:
What|Removed |Added
Target Milestone|--- |11.0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
Martin Liška changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
--- Comment #4 from Antony Polukhin ---
(In reply to Richard Biener from comment #3)
> But maybe
> you can provide benchmark data (including compile-time/memory-use figures)?
OK. Is there any GCC specific tool or flag for that?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
--- Comment #3 from Richard Biener ---
(In reply to Antony Polukhin from comment #2)
> Can the -ftree-partial-pre flag be enabled by default for -O2?
It used to be quite slow in its dataflow compute but that has improved.
It's still quadratic in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
--- Comment #2 from Antony Polukhin ---
Can the -ftree-partial-pre flag be enabled by default for -O2?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92455
--- Comment #1 from Richard Biener ---
You need partial-PRE to perform the desired transform. With -O3 or -O2
-ftree-partial-pre we do what you suggest (plus also cache *max->ptr in
exchange
for another IV):
f1:
.LFB0:
.cfi_startproc
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