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6bf61e532c
It's rare but there are a small number of patterns like this:
(set i64:$dst, (add i64:$src1, i64:$src2))
These should be equivalent to register classes except they shouldn't check for
a specific register bank.
This doesn't occur in AArch64/ARM/X86 but does occasionally come up in other
in-tree targets such as BPF.
llvm-svn: 315226
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