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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/94605] [8/9 Regression] ICE in
 early-remat.c:process_block with multi-output asms
Date: Fri, 07 Aug 2020 09:40:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94605

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Richard Sandiford
<rsandifo@gcc.gnu.org>:

https://gcc.gnu.org/g:cdb0af30f73923ec4355ecd5c294b7a026bb4aa4

commit r9-8790-gcdb0af30f73923ec4355ecd5c294b7a026bb4aa4
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Fri Aug 7 10:39:39 2020 +0100

    early-remat: Handle sets of multiple candidate regs [PR94605]

    early-remat.c:process_block wasn't handling insns that set multiple
    candidate registers, which led to an assertion failure at the end
    of the main loop.

    Instructions that set two pseudos aren't rematerialisation candidates in
    themselves, but we still need to track them if another instruction that
    sets the same register is a rematerialisation candidate.

    gcc/
            PR rtl-optimization/94605
            * early-remat.c (early_remat::process_block): Handle insns that
            set multiple candidate registers.

    gcc/testsuite/
            PR rtl-optimization/94605
            * gcc.target/aarch64/sve/pr94605.c: New test.

    (cherry picked from commit 3c3f12e2a7625c9a2f5d74a47dbacb2fd1ae5643)=