Daan Sprenkels 464b9aeafe [InstCombine] Transform extelt-trunc -> bitcast-extelt ...

Canonicalize the case when a scalar extracted from a vector is
truncated.  Transform such cases to bitcast-then-extractelement.
This will enable erasing the truncate operation.

This commit fixes PR45314.

reviewers: spatel

Differential revision: https://reviews.llvm.org/D76983

2020-03-31 11:53:41 +02:00

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