i965: get uses discard from nir info

This is a step towards dropping the GLSL IR version of
do_set_program_inouts() in i965 and moving towards native nir support.

This is important because we want to eventually convert to nir and
use its optimisations passes before we can call this GLSL IR pass.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index b0167d2245415801bfabc3be6fcc6eacb1b6f158..aac04698e1d8462de278690030757c655a9ce2e1 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -448,8 +448,10 @@ brw_wm_populate_key(struct brw_context *brw, struct brw_wm_prog_key *key)
     */
    if (brw->gen < 6) {
       /* _NEW_COLOR */
-      if (fp->program.UsesKill || ctx->Color.AlphaEnabled)
+      if (fp->program.Base.nir->info.fs.uses_discard ||
+          ctx->Color.AlphaEnabled) {
         lookup |= IZ_PS_KILL_ALPHATEST_BIT;
+      }
 
       if (fp->program.Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH))
         lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
@@ -601,7 +603,7 @@ brw_fs_precompile(struct gl_context *ctx,
    memset(&key, 0, sizeof(key));
 
    if (brw->gen < 6) {
-      if (fp->UsesKill)
+      if (fp->Base.nir->info.fs.uses_discard)
          key.iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 
       if (fp->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH))