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[Legacy][TimePasses] allow -time-passes reporting into a custom stream

Authored by fedor.sergeev on Mar 22 2019, 4:11 PM.

Description

[Legacy][TimePasses] allow -time-passes reporting into a custom stream

As a followup to newpm -time-passes fix (D59366), now adding a similar
functionality to legacy time-passes.

Enhancing llvm::reportAndResetTimings to accept an optional stream
for reporting output. By default it still reports into the stream created
by CreateInfoOutputFile (-info-output-file).

Also fixing to actually reset after printing as declared.

Reviewed By: philip.pfaffe
Differential Revision: https://reviews.llvm.org/D59416

llvm-svn: 356824

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