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2 Commits

Author SHA1 Message Date
Meghana Gupta
5285bf7200 Turn off speculative devirtualization by default. (#29359) 
Turn off speculative devirtualization by default. Add a flag to support enabling the pass.
Fixes rdar://58778959 and rdar://58429282
 2020-01-24 10:23:06 -08:00
Erik Eckstein
8033476b64 Function-level optimization attributes. 
For now these are underscored attributes, i.e. compiler internal attributes:
@_optimize(speed)
@_optimize(size)
@_optimize(none)

Those attributes override the command-line specified optimization mode for a specific function.
The @_optimize(none) attribute is equivalent to the already existing @_semantics("optimize.sil.never") attribute
 2017-11-14 11:25:02 -08:00