Before the change the RCIdentityAnalysis kept a single map that contained
the module's RC information. When function passes needed to invalidate the
analysis they had to clear the RC information for the entire module. The
problem was mitigated by the fact that we process one function at a time, and
we start processing a new function less frequently.
II adopted the DominanceAnalysis structure. We should probably implement
this functionality as CRTP.
Swift SVN r26636
The old invalidation lattice was incorrect because changes to control flow could cause changes to the
call graph, so we've decided to change the way passes invalidate analysis. In the new scheme, the lattice
is replaced with a list of traits that passes preserve or invalidate. The current traits are Calls and Branches.
Now, passes report which traits they preserve, which is the opposite of the previous implementation where
passes needed to report what they invalidate.
Node: I tried to limit the changes in this commit to mechanical changes to ease the review. I will cleanup some
of the code in a following commit.
Swift SVN r26449
This allows types to be lowered as scalar reference-counted types without requiring them to have AST-level reference semantics. For now, put in a staging assertion to ensure isReferenceCounted == hasReferenceSemantics to make sure we set the bit properly everywhere.
Swift SVN r26238
optimizer freezing releases in the epilogue of functions that match to
SILArguments. This allows us to treat all such SILArguments throughout the
entire function as having a post dominating release.
<rdar://problem/18923030>
Swift SVN r23253
without a valid SILDebugScope. An assertion in IRGenSIL prevents future
optimizations from regressing in this regard.
Introducing SILBuilderWithScope and SILBuilderwithPostprocess to ease the
transition.
This patch is large, but mostly mechanical.
<rdar://problem/18494573> Swift: Debugger is not stopping at the set breakpoint
Swift SVN r22978
Currently, the pass just calls a local version of that function. After OzU, I
will enable the full pass (which is currently disabled behind a flag).
Swift SVN r21894
counts a basic block at a time many times to processing a set of
reference counts on a function many times.
Now we have the final API for the analysis side of ARC, the API user
gets back:
1. The pointer being tracked.
2. A set of increments.
3. A set of decrements.
4. A set of increment insertion points.
5. A set of decrement insertion points.
<rdar://problem/16965332>
Swift SVN r18539
