* Remove dead ModuleSourceInfoFilename parameters
These were never actually used; we might find a way to bring them back later.
* Introduce SerializedModuleBaseName
This is intended to replace the _n_ filename parameters that tend to get passed around in the SerializedModuleLoader classes.
* Manipulate currPath in SerializedModuleLoader less often
* Don’t pass raw paths around SerializedModuleLoader
Only pass base names.
* Regularize module file opening functions
I have been using this in a bunch of places in the compiler and rather than
implement it by hand over and over (and maybe messing up), this commit just
commits a correct implementation.
This data structure is a map backed by a vector like data structure. It has two
phases:
1. An insertion phase when the map is mutable and one inserts (key, value) pairs
into the map. These are just appeneded into the storage array.
2. A frozen stage when the map is immutable and one can now perform map queries
on the multimap.
The map transitions from the mutable, thawed phase to the immutable, frozen
phase by performing a stable_sort of its internal storage by only the key. Since
this is a stable_sort, we know that the relative insertion order of values is
preserved if their keys equal. Thus the sorting will have created contiguous
regions in the array of values, all mapped to the same key, that are insertion
order. Thus by finding the lower_bound for a given key, we are guaranteed to get
the first element in that continguous range. We can then do a forward search to
find the end of the region, allowing us to then return an ArrayRef to these
internal values.
The reason why I keep on finding myself using this is that this map enables one
to map a key to an array of values without needing to store small vectors in a
map or use heap allocated memory, all key, value pairs are stored inline (in
potentially a single SmallVector given that one is using SmallFrozenMultiMap).
Restore the previous commit which somehow passed the buildbot given a
missing condition on the sub-configure for libdispatch. This makes it
more explicit as to what the desire is; the variable was being used to
serve as a proxy for whether the build is not on a Darwin target.
This flag was being used as an alias for whether or not the host is
non-Darwin. Rather than adding custom checks for this, use the explicit
check that CMake supports. This simplifies the logic and avoids the
proliferation of custom variables which can become confusing for others
who are not familiar with the custom build infrastructure.
The VFS tests were using Unix absolute paths, which does not play well
when Windows see them as relative to the current drive letter.
By using the temporal directory, both Windows and Unix can use the same
paths and avoid the problem.
Additionally, a couple of inputs have to be transformed into the native
path format, because sourcekitd-test compares the inputs as strings, and
they need to match exactly. So the source file and the name of the VFS
entries are transformed into native using the helper from LLVM support.
The long-running runtime tests depend on the Objective-C runtime on
Darwin, so link it directly rather than relying on various uses of
__builtin_available to link CoreFoundation for us.
