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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/106751] [10 Regression] internal compiler
 error: in purge_dead_edges with inline-asm goto
Date: Wed, 03 May 2023 15:20:01 +0000
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X-Bugzilla-Keywords: ice-on-valid-code, inline-asm
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106751

--- Comment #18 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:c88f917d2aa1c2ac065fbc0a10298f5551f392b6

commit r10-11348-gc88f917d2aa1c2ac065fbc0a10298f5551f392b6
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Dec 16 10:19:22 2022 +0100

    loop-invariant: Split preheader edge if the preheader bb ends with jump
[PR106751]

    The RTL loop passes only request simple preheaders, but don't require
    fallthru preheaders, while move_invariant_reg apparently assumes the
    latter, that it can just append instruction(s) to the end of the prehea=
der
    basic block.

    The following patch fixes that by splitting the preheader edge if
    the preheader bb ends with a JUMP_INSN (asm goto in this case).
    Without that we get control flow in the middle of a bb.

    2022-12-16  Jakub Jelinek  <jakub@redhat.com>

            PR rtl-optimization/106751
            * loop-invariant.c (move_invariant_reg): If preheader bb ends
            with a JUMP_INSN, split the preheader edge and emit invariants
            into the new preheader basic block.

            * gcc.c-torture/compile/pr106751.c: New test.

    (cherry picked from commit ddcaa60983b50378bde1b7e327086fe0ce101795)=