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Commit e5629966 authored by Tim Northover's avatar Tim Northover
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Teach TableGen to put chains on more instructions

When generating selection tables for Pat instances, TableGen relied on
an output Instruction's Pattern field being set to infer whether a
chain should be added.

This patch adds additional logic to check various flag fields so that
correct code can be generated even if Pattern is unset.

llvm-svn: 159217
parent 91844239
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