Remove restrictions on offset in Lowering::ContainBlockStoreAddress()

src/coreclr/jit/lowerarmarch.cpp

@@ -442,24 +442,14 @@ void Lowering::ContainBlockStoreAddress(GenTreeBlk* blkNode, unsigned size, GenT
     GenTreeIntCon* offsetNode = addr->AsOp()->gtGetOp2()->AsIntCon();
     ssize_t        offset     = offsetNode->IconValue();
 
-    // All integer load/store instructions on both ARM32 and ARM64 support
-    // offsets in range -255..255. Of course, this is a rather conservative
-    // check. For example, if the offset and size are a multiple of 8 we
-    // could allow a combined offset of up to 32760 on ARM64.
+#ifdef TARGET_ARM
+    // All integer load/store instructions on Arm support offsets in range -255..255.
+    // Of course, this is a rather conservative check.
     if ((offset < -255) || (offset > 255) || (offset + static_cast<int>(size) > 256))
     {
         return;
     }
-
-#ifdef TARGET_ARM64
-    // If we're going to use LDP/STP we need to ensure that the offset is
-    // a multiple of 8 since these instructions do not have an unscaled
-    // offset variant.
-    if ((size >= 2 * REGSIZE_BYTES) && (offset % REGSIZE_BYTES != 0))
-    {
-        return;
-    }
-#endif
+#endif // TARGET_ARM
 
     if (!IsSafeToContainMem(blkNode, addr))
     {