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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/91674] [ARM/thumb] redundant memcpy does not get
 optimized away on thumb
Date: Wed, 03 Aug 2022 17:25:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D91674

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is essentially a dup of PR105090, which is now fixed on master.  The c=
ode
generation in both Arm and Thumb2 state is essentially the same early on, b=
ut
in Thumb we were unable to optimize away all the byte manipulations.
The unused stack slot was needed at the time of early expansion to RTL and =
once
created there's no mechanism for getting rid of it if it is no-longer neede=
d.

*** This bug has been marked as a duplicate of bug 105090 ***=