https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Georg-Johann Lay changed:
What|Removed |Added
Target|avr, mips*-*-* |mips*-*-*
--- Comment #9 from Georg-J
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Georg-Johann Lay changed:
What|Removed |Added
See Also||https://gcc.gnu.org/bugzill
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Andrew Pinski changed:
What|Removed |Added
CC||tobias at ringis dot se
--- Comment #7 f
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Andrew Pinski changed:
What|Removed |Added
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Andrew Pinski changed:
What|Removed |Added
Target|avr |avr, mips*-*-*
Status|UNCONFI
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #5 from Georg-Johann Lay 2011-07-21
20:46:05 UTC ---
In this case it would not reduce the size of the store, but how can this be
seen?
It cannot be seen from the insn/pattern alone.
Do you have an idea how to attack this optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #4 from pinskia at gmail dot com
2011-07-21 20:39:08 UTC ---
On Thu, Jul 21, 2011 at 1:34 PM, gjl at gcc dot gnu.org
wrote:
> I don't know the exact rationale why volatile_ok is false in combine.
> It' obviously about volatile correc
On Thu, Jul 21, 2011 at 1:34 PM, gjl at gcc dot gnu.org
wrote:
> I don't know the exact rationale why volatile_ok is false in combine.
> It' obviously about volatile correctnet, but I don't see what would break
> here.
It can, when dealing optimizations that reduce the size of load/stores
of vol
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #3 from Georg-Johann Lay 2011-07-21
20:34:14 UTC ---
> (In reply to comment #2)
> That's not quite correct. In avr-libc the header file sfr_defs.h will define a
> register as this:
>
> #define SPDR (*((volatile char *) 0x2c))
(volat
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #2 from Eric Weddington
2011-07-21 20:12:58 UTC ---
(In reply to comment #0)
> This C source:
>
> #define SPDR (*((char volatile*) 0x2c))
Hi Johann,
That's not quite correct. In avr-libc the header file sfr_defs.h will define a
reg
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
Georg-Johann Lay changed:
What|Removed |Added
CC||eric.weddington at atmel
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807
--- Comment #1 from Georg-Johann Lay 2011-07-21
19:34:27 UTC ---
Created attachment 24804
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24804
C test case as in the initial PR
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