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[Reassociate] Removing instructions mutates the IR.

Description

[Reassociate] Removing instructions mutates the IR.

Fixes PR 30784. Discussed with Justin, who pointed out that
in the new PassManager infrastructure we can have more fine-grained
control on which analyses we want to preserve, but this is the
best we can do with the current infrastructure.

Details

Committed
davideOct 27 2016, 7:47 PM
Parents
rL285379: [ThinLTO] Create AliasSummary when building index
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