https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67609
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
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CC| |law at gcc dot gnu.org
--- Comment #15 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Vladimir Makarov from comment #14)
> The first solution is less safe as it may affect all targets. Although it
> could be implemented in a safe way: remove the subreg only if there is no
> insn definition with subreg. But I am not a specialist in writing md files
> to be sure (e.g. how to treat insn as *movdf_internal on all passes and only
> as insn with subreg on the final pass).
I think that RTL infrastructure should be fixed/enhanced first to allow proper
handling of subregs through all passes in a consistent way. There is no point
in a special workaround, applicable to only one target, as the same problem
will trigger also for other targets.
Adding Jeff to CC.
