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Author SHA1 Message Date
Jakob Stoklund Olesen
2ec0cda5d5 Avoid folding loads that are unsafe to move. 
LiveRangeEdit::foldAsLoad() can eliminate a register by folding a load
into its only use. Only do that when the load is safe to move, and it
won't extend any live ranges.

This fixes PR13414.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160575 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-20 21:29:31 +00:00