nv50/ir: fix ConstantFolding with saturation

For mul(a, +-1) codegen can generate OP_MOV with a saturation flag
set which is ignored at emission. The same can happen with add(a, 0),
and others.

Adding an assert for detecting more of such issues.

Fixes wrongly rendered water in Hitman Absolution running under wine.
Also a few shaders in Mad Max and Alien Isolation produce such MOVs.

CC: <[email protected]>
Signed-off-by: Karol Herbst <[email protected]>
Reviewed-by: Tobias Klausmann <[email protected]>
[imirkin: generalize the fix for other cases]
Reviewed-by: Ilia Mirkin <[email protected]>

0 files changed, 0 insertions, 0 deletions