Sjoerd Meijer 8cba99e2aa [ARM][MVE] Tail-Predication: rematerialise iteration count in exit blocks ...

This patch uses helper function rewriteLoopExitValues that is refactored in
D72602 to rematerialise the iteration count in exit blocks, so that we can
clean-up loop update expressions inside the hardware-loops later in
ARMLowOverheadLoops, which is necessary to get actual performance gains for
tail-predicated loops.

Differential Revision: https://reviews.llvm.org/D72714

2020-01-20 10:26:36 +00:00

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