[Bug rtl-optimization/103775] [12 Regression] Assembler messages: Warning: unpredictable transfer with writeback -- `ldrb w0,[x0,16]!'

acoplan at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Jan 7 11:50:06 GMT 2022


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103775

Alex Coplan <acoplan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |acoplan at gcc dot gnu.org

--- Comment #4 from Alex Coplan <acoplan at gcc dot gnu.org> ---
FWIW both the ICE and assembly failure started with
r12-3252-gcad36f38576a6a781e3c62ab061c68f5b8dab13a:

commit cad36f38576a6a781e3c62ab061c68f5b8dab13a
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Tue Aug 31 11:45:07 2021

    Preserve SUBREG_PROMOTED_VAR_P on (extend:HI (subreg/s:QI (reg:SI))).


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