Karol Herbst authored Aug 06, 2019 and Karol Herbst committed Sep 21, 2019

v2: minor formatting fixes
v3: call glsl_type_singleton_init_or_ref and glsl_type_singleton_decref
v4: capitalize and punctuate comments
    fix text_executable -> text_intermediate in TODO
    make glsl_type_singleton wrapper static
v5: rewrite how we run the nir passes
v6: fix unhandled case switch warning in st/mesa

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net> (v4)