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Commit 45774ce0 authored by Dan Gohman's avatar Dan Gohman
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Reapply the new LoopStrengthReduction code, with compile time and 

bug fixes, and with improved heuristics for analyzing foreign-loop
addrecs.

This change also flattens IVUsers, eliminating the stride-oriented
groupings, which makes it easier to work with.

llvm-svn: 95975
parent c7ef4cc9
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