// as the 'u uncommonType' field won't be accessed except when
			// tflag&abi.TFlagUncommon is set.
			return addToCache(toType(t))
		}
	}

	typ.Str = resolveReflectName(newName(str, "", false, false))
	if isRegularMemory(toType(&typ.Type)) {
		typ.TFlag = abi.TFlagRegularMemory
	} else {
		typ.TFlag = 0
	}
	typ.Hash = hash
	typ.Size_ = size
	typ.PtrBytes = typeptrdata(&typ.Type)

			gctyp = (*_type)(unsafe.Pointer(progSpan.base()))
			gctyp.Size_ = typ.Size_
			gctyp.PtrBytes = typ.PtrBytes
			gctyp.GCData = (*byte)(add(unsafe.Pointer(progSpan.base()), heapBitsOff))
			gctyp.TFlag = abi.TFlagUnrolledBitmap

			// Expand the GC program into space reserved at the end of the new span.
			runGCProg(addb(typ.GCData, 4), gctyp.GCData)
		}

		// Write out the header.
		*header = gctyp