[Bug target/101053] Incorrect code at -O1 on arm64

[gilles.gouaillardet at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101053

--- Comment #3 from Gilles Gouaillardet <gilles.gouaillardet at gmail dot com> 
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Thanks for the clarification about which registers have to be preserved.

I will dig this a bit more from now