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ArrayRef now has a new constructor that takes a parameter whose type
has data() and size(). This patch migrates:
ArrayRef<T>(X.data(), X.size()
to:
ArrayRef<T>(X)
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Removes LinkGraph's PointerSize and Endianness members and uses the triple to
find these values instead.
Also removes some redundant Triple copies.
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Use SymbolStringPtr for Symbol names in LinkGraph. This reduces string interning
on the boundary between JITLink and ORC, and allows pointer comparisons (rather
than string comparisons) between Symbol names. This should improve the
performance and readability of code that bridges between JITLink and ORC (e.g.
ObjectLinkingLayer and ObjectLinkingLayer::Plugins).
To enable use of SymbolStringPtr a std::shared_ptr<SymbolStringPool> is added to
LinkGraph and threaded through to its construction sites in LLVM and Bolt. All
LinkGraphs that are to have symbol names compared by pointer equality must point
to the same SymbolStringPool instance, which in ORC sessions should be the pool
attached to the ExecutionSession.
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Co-authored-by: Lang Hames <lhames@gmail.com>
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The SectCreateMaterializationUnit creates a LinkGraph with a single named
section containing a single named block whose content is given by a
MemoryBuffer. It is intended to support emulation of ld64's -sectcreate option.
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