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
..