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Commit f436bacb authored by Dan Gohman's avatar Dan Gohman
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Move the special cases for constants out of getUnknown and into 

createSCEV. Also, recognize UndefValue in createSCEV.

Change getIntegerSCEV's comment to avoid mentioning FP types,
and re-implement it in terms of getConstant instead of getUnknown.

llvm-svn: 74041
parent 17a7c129
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