https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30798
Andrew Pinski changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
See Also|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30798
Andrew Pinski pinskia at gcc dot gnu.org changed:
What|Removed |Added
Keywords||wrong-code
--- Comment #2 from TabonyEE at austin dot rr dot com 2007-03-11 18:28
---
Hhmm. I have made a few other changes and now when I don't define
WORD_REGISTER_OPERATIONS, I get correct code. I get an HI load followed by a
QI - SI zero extend, not the preferred POST_MODIFY. I looked at
--- Comment #3 from TabonyEE at austin dot rr dot com 2007-03-11 18:57
---
By the way, I think emit-rtl.c: change_address_1 could at least use an assert
that if the modes are different and the addresses are the same, then
mode_dependent_address_p is not true. That is unless
--- Comment #1 from TabonyEE at austin dot rr dot com 2007-03-04 02:25
---
For some reason, defining WORD_REGISTER_OPERATIONS prevents Combine from
transforming the HI load followed by the AND with 0xFF into a zero-extending QI
load. I don't know why this would be. I think not
