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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/113199] [14 Regression][GCN] ICE (segfault) due to
 invalid 'loop_mask_46 = VEC_PERM_EXPR' when compiling Newlib's wcsftime.c
Date: Tue, 09 Jan 2024 13:39:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113199

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tamar Christina <tnfchris@gcc.gnu.org=
>:

https://gcc.gnu.org/g:80bb94e88faaadd4d6f008fececb46214dc89e9f

commit r14-7065-g80bb94e88faaadd4d6f008fececb46214dc89e9f
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Tue Jan 9 13:35:49 2024 +0000

    middle-end: check if target can do extract first for early breaks
[PR113199]

    I was generating the vector reverse mask without checking if the target
    actually supported such an operation.

    This patch changes it to if the bitstart is 0 then use BIT_FIELD_REF
instead
    to extract the first element since this is supported by all targets.

    This is good for now since masks always come from whilelo.  But in the
future
    when masks can come from other sources we will need the old code back.

    gcc/ChangeLog:

            PR tree-optimization/113199
            * tree-vect-loop.cc (vectorizable_live_operation_1): Use
            BIT_FIELD_REF.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/113199
            * gcc.target/gcn/pr113199.c: New test.=