fixes view types for sizeof() and --gc:orc (#15680)

compiler/ccgexprs.nim

@@ -2328,10 +2328,10 @@ proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
   of mNewSeqOfCap: genNewSeqOfCap(p, e, d)
   of mSizeOf:
     let t = e[1].typ.skipTypes({tyTypeDesc})
-    putIntoDest(p, d, e, "((NI)sizeof($1))" % [getTypeDesc(p.module, t)])
+    putIntoDest(p, d, e, "((NI)sizeof($1))" % [getTypeDesc(p.module, t, skVar)])
   of mAlignOf:
     let t = e[1].typ.skipTypes({tyTypeDesc})
-    putIntoDest(p, d, e, "((NI)NIM_ALIGNOF($1))" % [getTypeDesc(p.module, t)])
+    putIntoDest(p, d, e, "((NI)NIM_ALIGNOF($1))" % [getTypeDesc(p.module, t, skVar)])
   of mOffsetOf:
     var dotExpr: PNode
     if e[1].kind == nkDotExpr:
@@ -2341,7 +2341,7 @@ proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
     else:
       internalError(p.config, e.info, "unknown ast")
     let t = dotExpr[0].typ.skipTypes({tyTypeDesc})
-    let tname = getTypeDesc(p.module, t)
+    let tname = getTypeDesc(p.module, t, skVar)
     let member =
       if t.kind == tyTuple:
         "Field" & rope(dotExpr[1].sym.position)

compiler/sizealignoffsetimpl.nim

@@ -242,7 +242,7 @@ proc computeSizeAlign(conf: ConfigRef; typ: PType) =
     else:
       typ.size = conf.target.ptrSize
     typ.align = int16(conf.target.ptrSize)
-  of tyCString, tySequence, tyPtr, tyRef, tyVar, tyLent, tyOpenArray:
+  of tyCString, tySequence, tyPtr, tyRef, tyVar, tyLent:
     let base = typ.lastSon
     if base == typ:
       # this is not the correct location to detect ``type A = ptr A``

tests/views/tsplit_into_seq.nim

@@ -4,7 +4,7 @@ asdf
 231
 231
 '''
-  cmd: "nim c $file"
+  cmd: "nim c --gc:orc $file"
 """
 
 {.experimental: "views".}