Handle calling conventions and cleanups in all the places (hopefully).
- when ExistentialSpecializer copies the specialized concrete arg into the
original existential value
- when ExistentialSpecializer generates a think
- when SILCombine substitutes concrete values in place of the opened
existential.
One particularly nasty problem is the existential boxes need to be
destroyed. It is not ok to simply destroy their value. The "leaks"
tool does not catch this problem.
Ownership SIL will make this all much more robust.
Fixes <rdar://problem/50595630> Multiple leaks detected - Swift Perf
This option no longer works but was still in the option file and help
message.
Add a temporary pass-specific option instead for debugging until this
pass has been sufficiently tested yet.
This disables a bunch of passes when ownership is enabled. This will allow me to
keep transparent functions in ossa and skip most of the performance pipeline without
being touched by passes that have not been updated for ownership.
This is important so that we can in -Onone code import transparent functions and
inline them into other ossa functions (you can't inline from ossa => non-ossa).
Generalizes the ConcreteExistentialInfo abstraction so it can be used
both by the ExistentialSpecializer and SILCombine, allowing redundant
code in ExistentialSpecializer.cpp to be deleted.
Splits OpenedArchetypeInfo from ConcreteExistentialInfo. Adds a
ConcreteOpenedArchetypeInfo convenience wrapper around them both, for
use wherever we were originally using ConcreteExistentialInfo.
Splits getAddressOfStackInit into getStackInitInst, This is cleaner and
allows both the ExistentialSpecializer and SILCombine to handle more
interesting cases in the future, like unconditional_checked_cast.
Creates utilities, initializeSubstitutionMap, and
initializeConcreteTypeDef to simplify an generalize
ConcreteExistentialInfo.
While rewriting ExistentialSpecializer to use the new
abstraction, I fixed a latent bug in which is was using a SIL
argument index as a function type parameter index (this would
have broken up if/when we decide to enable calls with indirect
results).
