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Subject: [Bug target/94613] S/390, powerpc: Wrong code generated for vec_sel
 builtin
Date: Mon, 04 May 2020 08:39:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94613

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Andreas Krebbel
<krebbel@gcc.gnu.org>:

https://gcc.gnu.org/g:92ee7d437a98a0f9e63549b4aa83af87382821cf

commit r9-8562-g92ee7d437a98a0f9e63549b4aa83af87382821cf
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date:   Mon Apr 20 19:36:33 2020 +0200

    PR94613: Fix vec_sel builtin for IBM Z

    The vsel instruction is a bit-wise select instruction.  Using an
    IF_THEN_ELSE to express it in RTL is wrong and leads to wrong code being
    generated in the combine pass.

    With the patch the pattern is written using bit operations.  However,
    I've just noticed that the manual still demands a fixed point mode for
    AND/IOR and friends although several targets emit bit ops on floating
    point vectors (including i386, Power, and s390). So I assume this is a
    safe thing to do?!

    gcc/ChangeLog:

    2020-05-04  Andreas Krebbel  <krebbel@linux.ibm.com>

            Backport from mainline
            2020-04-20  Andreas Krebbel  <krebbel@linux.ibm.com>

            PR target/94613
            * config/s390/s390-builtin-types.def: Add 3 new function modes.
            * config/s390/s390-builtins.def: Add mode dependent low-level
            builtin and map the overloaded builtins to these.
            * config/s390/vx-builtins.md ("vec_selV_HW"): Rename to ...
            ("vsel<V_HW"): ... this and rewrite the pattern with bitops.

    gcc/testsuite/ChangeLog:

    2020-05-04  Andreas Krebbel  <krebbel@linux.ibm.com>

            Backport from mainline
            2020-04-20  Andreas Krebbel  <krebbel@linux.ibm.com>

            PR target/94613
            * gcc.target/s390/zvector/pr94613.c: New test.
            * gcc.target/s390/zvector/vec_sel-1.c: New test.=