System.GC.AllocateUninitializedArray (#24096)

* Do not expand to allocation_quantum in SOH when GC_ALLOC_ZEROING_OPTIONAL

* short-circuit short arrays to use `new T[size]`

* Clean syncblock of large-aligned objects on ARM32

* specialize single-dimensional path  AllocateSzArray

* Unit tests

* Some PR feedback. Made AllocateUninitializedArray not be trimmed away.

* PR feedback on gchelpers
- replaced use of multiple bool parameters with flags enum
- merged some methods with nearly identical implementation
- switched callers to use AllocateSzArray vs. AllocateArrayEx where appropriate.

* PR feedback. Removed X86 specific array/string allocation helpers.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/vm/object.h b/src/vm/object.h
index 173036d249..4842a95b33 100644
--- a/src/vm/object.h
+++ b/src/vm/object.h
@@ -553,8 +553,8 @@ class ArrayBase : public Object
     friend class GCHeap;
     friend class CObjectHeader;
     friend class Object;
-    friend OBJECTREF AllocateArrayEx(MethodTable *pArrayMT, INT32 *pArgs, DWORD dwNumArgs, BOOL bAllocateInLargeHeap); 
-    friend OBJECTREF FastAllocatePrimitiveArray(MethodTable* arrayType, DWORD cElements, BOOL bAllocateInLargeHeap);
+    friend OBJECTREF AllocateSzArray(MethodTable *pArrayMT, INT32 length, GC_ALLOC_FLAGS flags, BOOL bAllocateInLargeHeap);
+    friend OBJECTREF AllocateArrayEx(MethodTable *pArrayMT, INT32 *pArgs, DWORD dwNumArgs, GC_ALLOC_FLAGS flags, BOOL bAllocateInLargeHeap); 
     friend FCDECL2(Object*, JIT_NewArr1VC_MP_FastPortable, CORINFO_CLASS_HANDLE arrayMT, INT_PTR size);
     friend FCDECL2(Object*, JIT_NewArr1OBJ_MP_FastPortable, CORINFO_CLASS_HANDLE arrayMT, INT_PTR size);
     friend class JIT_TrialAlloc;
@@ -721,7 +721,7 @@ class PtrArray : public ArrayBase
 {
     friend class GCHeap;
     friend class ClrDataAccess;
-    friend OBJECTREF AllocateArrayEx(MethodTable *pArrayMT, INT32 *pArgs, DWORD dwNumArgs, BOOL bAllocateInLargeHeap); 
+    friend OBJECTREF AllocateArrayEx(MethodTable *pArrayMT, INT32 *pArgs, DWORD dwNumArgs, DWORD flags, BOOL bAllocateInLargeHeap); 
     friend class JIT_TrialAlloc;
     friend class CheckAsmOffsets;