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Subject: [Bug rtl-optimization/102627] [11 Regression] wrong code with "-O1"
Date: Thu, 14 Oct 2021 16:11:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102627

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Vladimir Makarov
<vmakarov@gcc.gnu.org>:

https://gcc.gnu.org/g:99d21577f8a00196f3133fe1066de6e3e7d180c1

commit r11-9154-g99d21577f8a00196f3133fe1066de6e3e7d180c1
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Fri Oct 8 10:16:09 2021 -0400

    [PR102627] Use at least natural mode during splitting hard reg live ran=
ge

    In the PR test case SImode was used to split live range of cx on x86-64
    because it was the biggest mode for this hard reg in the function.  But
    all 64-bits of cx contain structure members.  We need always to use at
least
    natural mode of hard reg in splitting to fix this problem.

    gcc/ChangeLog:

            PR rtl-optimization/102627
            * lra-constraints.c (split_reg): Use at least natural mode of h=
ard
reg.

    gcc/testsuite/ChangeLog:

            PR rtl-optimization/102627
            * gcc.target/i386/pr102627.c: New test.=