Specifically, we get an additional table like thing called sil_moveonlydeinit. It looks as follows:
sil_moveonlydeinit TYPE {
@FUNC_NAME
}
It always has a single entry.
Currently the debug info infrastructure inside SIL can only associate a
source variable with a single (simple) SSA value. Which is insufficient
to preserve (correct) debug info across SIL-level optimizations -- for
example, SROA that decompose or even eliminate aggregate-type obejcts.
By adding DIExpression into SIL, we are able to reconstruct the
connection between a source variable and its SSA value counterpart, even
across optimizations. This patch adds such support into in-memory
representation for SIL instructions and the SILParser/Printer. The
following patch will add changes for the IRGen part.
... and use that API in FullApplySite::insertAfterInvocation.
Also change FullApplySite::insertAfterInvocation/insertAfterFullEvaluation to directly pass a SILBuilder instead of just an insertion point to the callback.
This makes more sense (given the function names) and simplifies the usages.
It's a NFC.
This simplifies the handling of the subdirectories in the SIL and
SILOptimizer paths. Create individual libraries as object libraries
which allows the analysis of the source changes to be limited in scope.
Because these are object libraries, this has 0 overhead compared to the
previous implementation. However, string operations over the filenames
are avoided. The cost for this is that any new sub-library needs to be
added into the list rather than added with the special local function.
Specifically, I split it into 3 initial categories: IR, Utils, Verifier. I just
did this quickly, we can always split it more later if we want.
I followed the model that we use in SILOptimizer: ./lib/SIL/CMakeLists.txt vends
a macro (sil_register_sources) to the sub-folders that register the sources of
the subdirectory with a global state variable that ./lib/SIL/CMakeLists.txt
defines. Then after including those subdirs, the parent cmake declares the SIL
library. So the output is the same, but we have the flexibility of having
subdirectories to categorize source files.
