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-rw-r--r--src/mesa/main/ffvertex_prog.c2
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;