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Commit 5b78c9d5 authored by Simon Pilgrim's avatar Simon Pilgrim
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[SelectionDAG] Add partial sign-bit support to ComputeNumSignBits for BITCAST nodes 

Only adds support to the existing 'large element' scalar/vector to 'small element' vector bitcasts.

Handle the case where the sign bit extends to only part of the small elements.

llvm-svn: 340169
parent d882a497
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