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Commit 29abce31 authored by Andrew Trick's avatar Andrew Trick
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Fix LSR: don't normalize quadratic recurrences.

Partial fix for PR17459: wrong code at -O3 on x86_64-linux-gnu
(affecting trunk and 3.3)

ScalarEvolutionNormalization was attempting to normalize by adding and
subtracting strides. Chained recurrences don't work that way.

llvm-svn: 193437
parent 7749d7cc
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