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Commit 8d1aaf21 authored by Jakob Stoklund Olesen's avatar Jakob Stoklund Olesen
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Rewrite the physreg part of findLastUseBefore(). 

To find the last use of a register unit, start from the bottom and scan
upwards until a user is found.

<rdar://problem/13353090>

llvm-svn: 176706
parent faae9d3a
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