Re: [PATCH] PR rtl-optimization/123585: ICE in vec_select simplification on x86_64.

[Richard Biener]

On Tue, Jan 20, 2026 at 1:14 PM Roger Sayle <ro...@nextmovesoftware.com> wrote:
>
>
> This patch is my proposed fix to PR rtl-optimization/123585, an ICE caused
> by some incorrect logic in a gcc_assert.
>
> This patch has been tested on x86_64-pc-linux-gnu with make bootstrap
> and make -k check, both with and without --target_board=unix{-m32}
> with no new failures.  Ok for mainline?

OK.

Thanks,
Richard.

>
> 2026-01-20  Roger Sayle  <ro...@nextmovesoftware.com>
>
> gcc/ChangeLog
>         PR rtl-optimization/123585
>         * simplify-rtx.cc (simplify_context::simplify_binary_operation_1)
>         <case VEC_SELECT>: Correct gcc_assert when optimizing a vec_select
>         of a vec_select with differing vector lengths.
>
> gcc/testsuite/ChangeLog
>         PR rtl-optimization/123585
>         * gcc.target/i386/pr123585.c: New test case.
>
>
> Roger
> --
>