David Green 146d44c251 [LSR] Don't require register reuse under postinc ...

LSR has some logic that tries to aggressively reuse registers in
formula. This can lead to sub-optimal decision in complex loops where
the backend it trying to use shouldFavorPostInc. This disables the
re-use in those situations.

Differential Revision: https://reviews.llvm.org/D79301

2020-05-05 16:04:50 +01:00

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