Anna Thomas 69921f6f45 [InstCombine] Improve TryToSinkInstruction with multiple uses ...

This patch allows sinking an instruction which can have multiple uses in a
single user. We were previously over-restrictive by looking for exactly one use,
rather than one user.

Also added an API for retrieving a unique undroppable user.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D109700

2021-09-21 10:04:04 -04:00

42 KiB

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