[Bug target/30829] extra register zero extends on x86_64

2023-06-04 Thread roger at nextmovesoftware dot com via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30829 Roger Sayle changed: What|Removed |Added CC||roger at nextmovesoftware dot com

[Bug target/30829] extra register zero extends on x86_64

2019-06-07 Thread egallager at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30829 Eric Gallager changed: What|Removed |Added See Also||https://gcc.gnu.org/bugzill

[Bug target/30829] extra register zero extends

2007-11-09 Thread rask at gcc dot gnu dot org
--- Comment #2 from rask at gcc dot gnu dot org 2007-11-09 11:08 --- It's not unusual to need more than one instruction pattern for the same machine instruction. See http://gcc.gnu.org/ml/gcc-patches/2007-10/msg01318.html> and the followup for a recent example and what you can do about i

[Bug target/30829] extra register zero extends

2007-11-08 Thread dje at google dot com
--- Comment #1 from dje at google dot com 2007-11-09 00:57 --- I looked into what's going on here. This is a problem in the i386.md lshr+zext combiner patterns (or a problem in the combine pass, depending on one's point of view). There are patterns in i386.md that are supposed to handl