David Green 7786ac8377 [ARM] Remove dead mov's in preheader of tail predicated loops ...

With t2DoLoopDec we can be left with some extra MOV's in the preheaders
of tail predicated loops. This removes them, in the same way we remove
other dead variables.

Differential Revision: https://reviews.llvm.org/D91857

2021-02-11 10:48:20 +00:00

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