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Subject: [Bug target/102785] [12 Regression] {smul,umul}_highpart changes
 break bfin-elf
Date: Tue, 19 Oct 2021 10:02:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102785

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Roger Sayle <sayle@gcc.gnu.org>:

https://gcc.gnu.org/g:f98359ba9d3775319fb3181009be7d3dafe9ba15

commit r12-4497-gf98359ba9d3775319fb3181009be7d3dafe9ba15
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Tue Oct 19 11:00:10 2021 +0100

    PR target/102785: Correct addsub/subadd patterns on bfin.

    This patch resolves PR target/102785 where my recent patch to constant
    fold saturating addition/subtraction exposed a latent bug in the bfin
    backend.  The patterns used for blackfin's V2HI ssaddsub and sssubadd
    instructions had the indices/operations swapped.  This was harmless
    until we started evaluating these expressions at compile-time, when
    the mismatch was caught by the testsuite.

    2021-10-19  Roger Sayle  <roger@nextmovesoftware.com>

    gcc/ChangeLog
            PR target/102785
            * config/bfin/bfin.md (addsubv2hi3, subaddv2hi3, ssaddsubv2hi3,
            sssubaddv2hi3):  Swap the order of operators in vec_concat.=