[Bug middle-end/124250] [14/15 Regression] LoongArch: internal compiler error: in extract_insn, at recog.cc:2882

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124250

--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Xi Ruoyao <xry111@gcc.gnu.org>:

https://gcc.gnu.org/g:89e6b4902e850d350ead6f11eaf4dd6a98b8c715

commit r14-12343-g89e6b4902e850d350ead6f11eaf4dd6a98b8c715
Author: Xi Ruoyao <xry111@xry111.site>
Date:   Thu Feb 26 11:55:22 2026 +0800

    middle-end: extend the narrower shift amount before broadcasting it [PR
124250]

    The comment above expand_vector_broadcast() states a precondition that
    the mode of op must be the element mode of vmode.  But when
    expand_binop() called expand_vector_broadcast() to broadcast the shift
    amount, it only truncated the shift amount if it's too wide, but no
    action is performed if the shift amount is too narrow.

    Note that the assertion in expand_vector_broadcast is deliberately
    skipped in the backport, in order not to wake up latent "harmless" bugs.

            PR middle-end/124250
            PR target/123807

    gcc/
            * optabs.cc (expand_binop): Extend the shift amount if it's
            narrower than the element of the shifted vector.

    gcc/testsuite/

            * gcc.c-torture/compile/pr124250.c: New test.

    (cherry picked from commit 1139fdadc85a0b602a2833e6b7f2cfe2a8a90cdb)