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Commit 5122d615 authored by Dan Gohman's avatar Dan Gohman
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Add memoization for getSCEVAtScope results for instructions 

which are not analyzed with SCEV techniques, which can require
brute-forcing through a large number of instructions. This
fixes a massive compile-time issue on 400.perlbench (in
particular, the loop in MD5Transform).

llvm-svn: 71259
parent b81f47d1
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