[Bug rtl-optimization/126374] Incorrect codegen with -O2 -fno-tree-sra, struct containing union
"pinskia at gcc dot gnu.org via Gcc-bugs" <[email protected]>
| Newsgroups | gmane.comp.gcc.bugs |
|---|---|
| Message-ID | <[email protected]/bugzilla/> |
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126374
Drea Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
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Target| |aarch64-linux-gnu
Keywords| |ra, wrong-code
Component|tree-optimization |rtl-optimization
--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Carlos Galvez from comment #1)
> Bisecting shows the problem appears here (GCC 7):
> https://github.com/gcc-mirror/gcc/commit/
> 10406801f48939f8cad083ed3ed86143bef5eb01
If it started here then it is an RTL level issue. It might even have been a
register allocator issue.
>
> And disappears here (GCC 10):
> https://github.com/gcc-mirror/gcc/commit/
> 744fd446c321f78f9a1ce4ef5f83df8dcfa44a9e
>
> But the last commit doesn't appear to actively fix any bug, so it might be
> just coincidence.
Most likely yes but there has been many fixes to the register allocator
afterwards that it might be fixed already fully too.