It's only used for creating intrinsics calls, which is an
implementation detail.

Bug swiftshader:10

Change-Id: Ieac1303e08571e265e239e74c6ea84ece99b53e1
Reviewed-on: https://swiftshader-review.googlesource.com/7278Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>