[Bug tree-optimization/110182] [11/12/13/14 Regression] Vector(2) cast from double to float and back and subtraction seems to produce incorrect results

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110182

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
commit 3e12669a0eb968cfcbe9242b382fd8020935edf8 (origin/master, origin/HEAD)
Author: Richard Biener <rguent...@suse.de>
Date:   Fri Jun 9 09:29:09 2023 +0200

    middle-end/110182 - TYPE_PRECISION on VECTOR_TYPE causes wrong-code

    When folding two conversions in a row we use TYPE_PRECISION but
    that's invalid for VECTOR_TYPE.  The following fixes this by
    using element_precision instead.

            * match.pd (two conversions in a row): Use element_precision
            to DTRT for VECTOR_TYPE.