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Author SHA1 Message Date
Vedant Kumar b755a2df51 [HotColdSplit] Mark inherently cold functions as such 
If an inherently cold function is found, mark it as cold. For now this
means applying the `cold` and `minsize` attributes.

As a drive-by, revisit and clean up the criteria for considering a
function for splitting. Add tests.

llvm-svn: 351623
 2019-01-19 02:38:47 +00:00
Vedant Kumar 32a014d048 [HotColdSplit] Simplify tests by lowering their splitting thresholds 
This gets rid of the brittle/mysterious calls to @sink()/@sideeffect()
peppered throughout the test cases. They are no longer needed to force
splitting to occur.

llvm-svn: 351480
 2019-01-17 21:29:34 +00:00