Simon Pilgrim 603f94aa2a [TargetLowering] SimplifyMultipleUseDemandedBits - add BITCAST pass through support (Reapplied) ...

This allows us to peek through BITCASTs, attempt to simplify the source operand, and then bitcast back.

This reapplies rL367091 which was reverted at rL367118 - we were inconsistently peeking through the bitcasts to the source value.

Fixes PR42777

llvm-svn: 367174

2019-07-27 14:11:59 +00:00

261 KiB

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