virgl: Propagate precice flag through moves
NIR doesn't propagate precise through moves, and with NTT the
last output is usually preceded by a move, so that we no longer
see that the evaluation of some value is supposed to be exact,
and, hence we can't decorate the outputs accordingly.
Fixes with NTT:
dEQP-GLES31.functional.tessellation.common_edge.
triangles_equal_spacing_precise
triangles_fractional_odd_spacing_precise
triangles_fractional_even_spacing_precise
quads_equal_spacing_precise
quads_fractional_odd_spacing_precise
quads_fractional_even_spacing_precise
v2: Don't clear the precise flag when we hit a mov, because we may
hit a if/else construct like below and we don't track branches
IF X
TEMP[0] = OP_PRECICE ...
ELSE
TEMP[0] = MOV CONST[]
ENDIF
Thanks Emma for pointing out the problem.
v2: allocate precise handling flags to transform_prolog (Emma)
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Acked-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15836>
1 file changed
