https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110255
Bug ID: 110255
Summary: arm: MVE intrinsics C++ polymorphism with
-flax-vector-conversions
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: stammark at gcc dot gnu.org
Target Milestone: ---
Hi all,
See: https://godbolt.org/z/53ME1fGfM
The compiler with the error is the one that is using -flax-vector-conversions
through the C++ frontend.
Unsure if this is something to do with the C++ front-end or something in the
target backend (and how the builtins are registered with the front-end).
This seems to happen regardless of if the vaddq intrinsic has been
"restructured" by Christophe's
https://gcc.gnu.org/pipermail/gcc-patches/2023-April/615997.html (so going back
to older GCC12,13 still gives the error), but another intrinsic, like vbicq,
doesn't give the error at all (although that has a different context of the
`int` immediate having to be a compile-time constant).
(clang handles all this fine FWIW)
Has anyone seen this kind of thing before, have any ideas on workarounds, or
have any insight on if this this invalid C++ to begin with?
