[Bug target/81422] [aarch64] internal compiler error: in update_equiv_regs, at ira.c:3425

[qing.zhao at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81422

--- Comment #3 from Qing Zhao <qing.zhao at oracle dot com> ---
if the DEST is NOT a REG (sometimes it's a SUBREG, for example in the testing
case of this Bug), the REG_EQUIV notes should NOT be added.