Add --param=profile=perf option to lit.

Description

Add --param=profile=perf option to lit.

This option will also run each test under perf record, and store the
perf data in the Output directory.

At least on my system, there seems to be a limitation on running many
perf profilers in parallel, so for best results it's probably best to
use lit -j1 in combination with this option.

Differential Revision: http://reviews.llvm.org/D16218

Details

Committed
kbeylsJan 28 2016, 7:30 AM
Differential Revision
D16218: [test-suite] Add --param=profile=perf option to lit.
Parents
rL259050: [x86] Merge multiple calls to DAG.getTargetLoweringInfo(). NFC.
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