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Wei Mi 0ca1ed2836 Recommit [SampleFDO] Add flag for partial profile.
Fix the error of show-prof-info.test on some platforms without zlib.

The common profile usage is to collect profile from a target and then use the profile to guide the optimized build for the same target. There are some cases that no profile can be collected for a target. In those cases, although no full profile is available, it is possible to have some partial profile collected from other targets to optimize common libraries and utilities. A flag is needed to tell the partial profile from the full profile apart, so compiler can use different strategy for them.

Differential Revision: https://reviews.llvm.org/D77426
2020-04-07 14:28:25 -07:00
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