Introduce `MemoryKind` abstraction

Re-cast the notion of "heap" (in liveness, SSA, and value-numbering) as
one of potentially many `MemoryKind`s, called `GcHeap`.  Update names,
comments, data structures, and signatures as appropriate to parameterize
relevant data/methods over `MemoryKind`.  This change is a no-diff
refactoring, and currently `GcHeap` is the only `MemoryKind`.  Generally,
codepaths which will generically need to process all `MemoryKinds`s
(initializing, dumping, dataflow propagation) now iterate over all
`MemoryKinds`, and codepaths which are sensitive to the semantics of the
specific `MemoryKind` (def/use identification in liveness and value
numbering) are changed to specifically operate on `MemoryKind::GcHeap`.

One notable exception is that `lvMemoryPerSsaData` and `CountForMemoryDef`
are *not* parameterized over `MemoryKind`; there's a single "space" of SSA
defnums for memory defs (though the same tree can incur different defs for
different memory kinds [in which case their defnums will differ]), to
facilitate subsequently sharing SSA nodes across memory kinds when
appropriate.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/jit/compmemkind.h b/src/jit/compmemkind.h
index e27d2071f7..b22bf6de1e 100644
--- a/src/jit/compmemkind.h
+++ b/src/jit/compmemkind.h
@@ -39,7 +39,7 @@ CompMemKindMacro(IndirAssignMap)
 CompMemKindMacro(FieldSeqStore)
 CompMemKindMacro(ZeroOffsetFieldMap)
 CompMemKindMacro(ArrayInfoMap)
-CompMemKindMacro(HeapPhiArg)
+CompMemKindMacro(MemoryPhiArg)
 CompMemKindMacro(CSE)
 CompMemKindMacro(GC)
 CompMemKindMacro(CorSig)