https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #12 from Jeffrey A. Law ---
IIRC LSM is quite restricted in the types of MEM expressions it will optimize.
In particular I think they have to be SYMBOL_REFs which severely limits LSM's
effectiveness.
I would support removing it give
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
Eric Botcazou changed:
What|Removed |Added
Status|NEW |WAITING
--- Comment #11 from Eric Botcaz
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
Richard Biener changed:
What|Removed |Added
CC||ebotcazou at gcc dot gnu.org,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #9 from Richard Biener ---
Btw, this is likely a latent issue, the store-motion code didn't change since
ages and the bisected rev. likely just changed the input to the pass.
So the dump difference is
-(note 76 75 217 19 [bb 19] NOT
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #8 from Richard Biener ---
(In reply to Richard Biener from comment #6)
> Btw, -fgcse-sm is nowhere enabled by default (same applies to -fgcse-las),
> we should consider removing these optimizations (though -fgcse-las at least
> sound
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #7
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #6 from Richard Biener ---
Btw, -fgcse-sm is nowhere enabled by default (same applies to -fgcse-las), we
should consider removing these optimizations (though -fgcse-las at least sounds
useful and I wonder why it is not enabled). GCSE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #5 from Andreas Krebbel ---
Created attachment 50132
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50132&action=edit
RTL dump from store motion pass
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #4 from Andreas Krebbel ---
The update of global variable c is moved out of the loop. Due to that c stays
at 8 although it should be counted down to 2.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #3 from Andreas Krebbel ---
Created attachment 50131
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50131&action=edit
RTL GCSE dump without -fgcse-sm
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #2 from Andreas Krebbel ---
Created attachment 50130
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50130&action=edit
RTL GCSE dump with -fgcse-sm
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
Richard Biener changed:
What|Removed |Added
Known to fail||11.0
Keywords|
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