https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
Jakub Jelinek changed:
What|Removed |Added
CC||uros at gcc dot gnu.org,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #4 from Vladimir Makarov ---
(In reply to Jakub Jelinek from comment #3)
> This looks like a RA issue or backend bug, perhaps the r215450 change needs
> to be narrowed down?
>
> In *.ira we have:
> (insn 3 2 4 2 (set (reg/v:V2TI 102
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #5 from Uroš Bizjak ---
(In reply to Vladimir Makarov from comment #4)
> I believe machine-dependent code is more responsible for it. I remember
> some discussion of it. LRA follows RTL semantics where insn
>
> (set (subreg reg 0)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #6 from Uroš Bizjak ---
IMO, we should revert r215450, and fix a couple of cases using narrowing
conversions with gen_lowpart that were introduced after r215450.
Something like:
--cut here--
Index: i386.c
===
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #7 from rsandifo at gcc dot gnu.org
---
(In reply to Uroš Bizjak from comment #6)
> IMO, we should revert r215450, and fix a couple of cases using narrowing
> conversions with gen_lowpart that were introduced after r215450.
Please g
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
rsandifo at gcc dot gnu.org changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assigne
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
rsandifo at gcc dot gnu.org changed:
What|Removed |Added
URL||https://gcc.gnu.org/ml/gcc-
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
Richard Henderson changed:
What|Removed |Added
CC||rth at gcc dot gnu.org
--- Comment #
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #11 from rsandifo at gcc dot gnu.org
---
Author: rsandifo
Date: Thu Feb 4 15:01:15 2016
New Revision: 233143
URL: https://gcc.gnu.org/viewcvs?rev=233143&root=gcc&view=rev
Log:
PR 69577: Invalid RA of destination subregs
In PR 6957
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
--- Comment #12 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu Feb 4 22:10:56 2016
New Revision: 233152
URL: https://gcc.gnu.org/viewcvs?rev=233152&root=gcc&view=rev
Log:
PR rtl-optimization/69577
Revert:
2015-10
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69577
Jeffrey A. Law changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
CC|
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