llvmpipe: eliminate the set_state rasterizer command

Just put a pointer to the state in the tri->inputs struct.  Remove
some complex logic for eliminating unused statechanges in bins at the
expense of a slightly larger triangle struct.

src/gallium/drivers/llvmpipe/lp_memory.c

@@ -45,6 +45,12 @@ lp_get_dummy_tile(void)
    return lp_dummy_tile;
 }
 
+uint8_t *
+lp_get_dummy_tile_silent(void)
+{
+   return lp_dummy_tile;
+}
+
 
 boolean
 lp_is_dummy_tile(void *tile)

src/gallium/drivers/llvmpipe/lp_memory.h

@@ -35,6 +35,8 @@
 extern uint8_t *
 lp_get_dummy_tile(void);
 
+uint8_t *
+lp_get_dummy_tile_silent(void);
 
 extern boolean
 lp_is_dummy_tile(void *tile);

src/gallium/drivers/llvmpipe/lp_rast.c

@@ -383,21 +383,6 @@ lp_rast_store_linear_color( struct lp_rasterizer_task *task,
 }
 
 
-/**
- * This is a bin command called during bin processing.
- */
-void
-lp_rast_set_state(struct lp_rasterizer_task *task,
-                  const union lp_rast_cmd_arg arg)
-{
-   const struct lp_rast_state *state = arg.set_state;
-
-   LP_DBG(DEBUG_RAST, "%s %p\n", __FUNCTION__, (void *) state);
-
-   /* just set the current state pointer for this rasterizer */
-   task->current_state = state;
-}
-
 
 /**
  * Run the shader on all blocks in a tile.  This is used when a tile is
@@ -409,8 +394,8 @@ lp_rast_shade_tile(struct lp_rasterizer_task *task,
                    const union lp_rast_cmd_arg arg)
 {
    struct lp_rasterizer *rast = task->rast;
-   const struct lp_rast_state *state = task->current_state;
    const struct lp_rast_shader_inputs *inputs = arg.shade_tile;
+   const struct lp_rast_state *state = inputs->state;
    struct lp_fragment_shader_variant *variant = state->variant;
    const unsigned tile_x = task->x, tile_y = task->y;
    unsigned x, y;
@@ -483,7 +468,7 @@ lp_rast_shade_quads_mask(struct lp_rasterizer_task *task,
                          unsigned x, unsigned y,
                          unsigned mask)
 {
-   const struct lp_rast_state *state = task->current_state;
+   const struct lp_rast_state *state = inputs->state;
    struct lp_fragment_shader_variant *variant = state->variant;
    struct lp_rasterizer *rast = task->rast;
    uint8_t *color[PIPE_MAX_COLOR_BUFS];
@@ -730,7 +715,6 @@ static struct {
    RAST(triangle_7),
    RAST(shade_tile),
    RAST(shade_tile_opaque),
-   RAST(set_state),
    RAST(store_linear_color),
    RAST(fence),
    RAST(begin_query),
@@ -786,8 +770,7 @@ is_empty_bin( const struct cmd_bin *bin )
    }
 
    for (i = 0; i < head->count; i++)
-      if (head->cmd[i] != lp_rast_set_state &&
-          head->cmd[i] != lp_rast_store_linear_color) {
+      if (head->cmd[i] != lp_rast_store_linear_color) {
          return FALSE;
       }
 

src/gallium/drivers/llvmpipe/lp_rast.h

@@ -83,6 +83,8 @@ struct lp_rast_shader_inputs {
    float (*a0)[4];
    float (*dadx)[4];
    float (*dady)[4];
+
+   const struct lp_rast_state *state;
 };
 
 struct lp_rast_clearzs {
@@ -225,9 +227,6 @@ void lp_rast_clear_color( struct lp_rasterizer_task *,
 void lp_rast_clear_zstencil( struct lp_rasterizer_task *, 
                              const union lp_rast_cmd_arg );
 
-void lp_rast_set_state( struct lp_rasterizer_task *, 
-                        const union lp_rast_cmd_arg );
-
 void lp_rast_triangle_1( struct lp_rasterizer_task *, 
                          const union lp_rast_cmd_arg );
 void lp_rast_triangle_2( struct lp_rasterizer_task *, 

src/gallium/drivers/llvmpipe/lp_rast_priv.h

@@ -53,8 +53,6 @@ struct lp_rasterizer_task
    uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
    uint8_t *depth_tile;
 
-   const struct lp_rast_state *current_state;
-
    /** "back" pointer */
    struct lp_rasterizer *rast;
 
@@ -144,10 +142,13 @@ lp_rast_get_depth_block_pointer(struct lp_rasterizer_task *task,
    assert((x % TILE_VECTOR_WIDTH) == 0);
    assert((y % TILE_VECTOR_HEIGHT) == 0);
 
-   if (!rast->zsbuf.map && (task->current_state->variant->key.depth.enabled ||
-                            task->current_state->variant->key.stencil[0].enabled)) {
-      /* out of memory - use dummy tile memory */
-      return lp_get_dummy_tile();
+   if (!rast->zsbuf.map) {
+      /* Either out of memory or no zsbuf.  Can't tell without access
+       * to the state.  Just use dummy tile memory, but don't print
+       * the oom warning as this most likely because there is no
+       * zsbuf.
+       */
+      return lp_get_dummy_tile_silent();
    }
 
    depth = (rast->zsbuf.map +
@@ -240,7 +241,7 @@ lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
                          unsigned x, unsigned y )
 {
    const struct lp_rasterizer *rast = task->rast;
-   const struct lp_rast_state *state = task->current_state;
+   const struct lp_rast_state *state = inputs->state;
    struct lp_fragment_shader_variant *variant = state->variant;
    uint8_t *color[PIPE_MAX_COLOR_BUFS];
    void *depth;

src/gallium/drivers/llvmpipe/lp_scene.c

@@ -306,60 +306,6 @@ lp_scene_is_resource_referenced(const struct lp_scene *scene,
 }
 
 
-/**
- * Return last command in the bin
- */
-static lp_rast_cmd
-lp_get_last_command( const struct cmd_bin *bin )
-{
-   const struct cmd_block *tail = bin->commands.tail;
-   const unsigned i = tail->count;
-   if (i > 0)
-      return tail->cmd[i - 1];
-   else
-      return NULL;
-}
-
-
-/**
- * Replace the arg of the last command in the bin.
- */
-static void
-lp_replace_last_command_arg( struct cmd_bin *bin,
-                             const union lp_rast_cmd_arg arg )
-{
-   struct cmd_block *tail = bin->commands.tail;
-   const unsigned i = tail->count;
-   assert(i > 0);
-   tail->arg[i - 1] = arg;
-}
-
-
-
-/**
- * Put a state-change command into all bins.
- * If we find that the last command in a bin was also a state-change
- * command, we can simply replace that one with the new one.
- */
-void
-lp_scene_bin_state_command( struct lp_scene *scene,
-                            lp_rast_cmd cmd,
-                            const union lp_rast_cmd_arg arg )
-{
-   unsigned i, j;
-   for (i = 0; i < scene->tiles_x; i++) {
-      for (j = 0; j < scene->tiles_y; j++) {
-         struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
-         lp_rast_cmd last_cmd = lp_get_last_command(bin);
-         if (last_cmd == cmd) {
-            lp_replace_last_command_arg(bin, arg);
-         }
-         else {
-            lp_scene_bin_command( scene, i, j, cmd, arg );
-         }
-      }
-   }
-}
 
 
 /** advance curr_x,y to the next bin */

src/gallium/drivers/llvmpipe/lp_setup.c

@@ -805,11 +805,6 @@ lp_setup_update_state( struct lp_setup_context *setup )
                    &setup->fs.current,
                    sizeof setup->fs.current);
             setup->fs.stored = stored;
-
-            /* put the state-set command into all bins */
-            lp_scene_bin_state_command( scene,
-					lp_rast_set_state, 
-					lp_rast_arg_state(setup->fs.stored) );
          }
 
          /* The scene now references the textures in the rasterization

src/gallium/drivers/llvmpipe/lp_setup_tri.c

@@ -535,6 +535,7 @@ do_triangle_ccw(struct lp_setup_context *setup,
    setup_tri_coefficients( setup, tri, &info );
 
    tri->inputs.facing = frontfacing ? 1.0F : -1.0F;
+   tri->inputs.state = setup->fs.stored;
 
 
   
@@ -774,9 +775,6 @@ do_triangle_ccw(struct lp_setup_context *setup,
 	       if (variant->opaque &&
 	           !setup->fb.zsbuf) {
 	          lp_scene_bin_reset( scene, x, y );
-	          lp_scene_bin_command( scene, x, y,
-	                                lp_rast_set_state,
-	                                lp_rast_arg_state(setup->fs.stored) );
 	       }
                lp_scene_bin_command( scene, x, y,
 				     lp_rast_shade_tile,