[Bug rtl-optimization/49884] get_last_value in combine ignores register mode

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49884

Andrew Pinski  changed:

   What|Removed |Added

 Resolution|INVALID |DUPLICATE

--- Comment #5 from Andrew Pinski  ---
So this was reproducible on avr in the end and it would be a dup of bug 71976.

*** This bug has been marked as a duplicate of bug 71976 ***

[Bug rtl-optimization/49884] get_last_value in combine ignores register mode

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49884

Segher Boessenkool  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |INVALID

--- Comment #4 from Segher Boessenkool  ---
Okay, closing then.  Thanks.

[Bug rtl-optimization/49884] get_last_value in combine ignores register mode

[pmatos at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49884

pmatos at gcc dot gnu.org changed:

   What|Removed |Added

 CC||pmatos at gcc dot gnu.org

--- Comment #3 from pmatos at gcc dot gnu.org ---
I am not working anymore on this company and have no access to the original
code. I think we can safely close this bug.

[Bug rtl-optimization/49884] get_last_value in combine ignores register mode

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49884

Segher Boessenkool  changed:

   What|Removed |Added

 CC||segher at gcc dot gnu.org

--- Comment #2 from Segher Boessenkool  ---
Hi,

Can you reproduce this on any target in mainline GCC?  That would
help people reproduce this.

You say you have (set (reg:HI) (ashift:HI (reg:HI) (const_int 16)))
and that will set all of the reg:HI to 0, so the reg:QI will also
be 0?  You seem to expect something else though?

[Bug rtl-optimization/49884] get_last_value in combine ignores register mode

[Paulo.Matos at csr dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49884

--- Comment #1 from Paulo J. Matos  2011-07-28 
09:46:36 UTC ---
Created attachment 24854
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24854
Fixes PR49884

Sent to gcc-patches.