Does -tree apply to armel?

[Jeffrey Walton]

Hi Everyone,

I was reading the description for -tree at
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html. The
description states:

    -free
        Attempt to remove redundant extension instructions. This is
        especially helpful for the x86-64 architecture, which implicitly
        zero-extends in 64-bit registers after writing to their lower
        32-bit half.

    Enabled for Alpha, AArch64 and x86 at levels -O2, -O3, -Os.

Debian is reporting issues to us under three Chroot environments:
armel, arm64, and amd64 (arm64 is aarch64). The issues are around an
area where Big Integers are used, and it only occurs at -O2 and above.
The Big Integers have some hand-tuned assembly language routines.

Interactions with -tree are at the top of my list because of the
symptoms, but I am not sure about armel.

Does -tree apply to armel?

Thanks in advance.