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Commit 39616039 authored by Bjorn Pettersson's avatar Bjorn Pettersson
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[ValueTracking] Teach computeKnownBits and ComputeNumSignBits to look through ExtractElement. 

Summary:
The computeKnownBits and ComputeNumSignBits functions in ValueTracking can now do a simple look-through of ExtractElement.

Reviewers: majnemer, spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D24955

llvm-svn: 283434
parent f9292220
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