mesa: assert that key->fragprog_inputs_read value isn't too large

fragprog_inputs_read is a 12-bit bitfield so check the assigned value.
MSVC warns on the assignment.  Not easy to fix but let's do a sanity check.

Reviewed-by: Jose Fonseca <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index efdca015e99..4cdec216696 100644
--- a/src/mesa/main/ffvertex_prog.c
+++ b/src/mesa/main/ffvertex_prog.c
@@ -160,6 +160,8 @@ static void make_state_key( struct gl_context *ctx, struct state_key *key )
 
    key->need_eye_coords = ctx->_NeedEyeCoords;
 
+   /* Make sure fp->Base.InputsRead fits in a 12-bit field */
+   assert(fp->Base.InputsRead < (1 << 12));
    key->fragprog_inputs_read = fp->Base.InputsRead;
    key->varying_vp_inputs = ctx->varying_vp_inputs;