nvc0: share shaders between contexts and build immediately

Avoid deferring building shaders until draw time, should hopefully
reduce any stuttering, as well as enable shader-db style analysis.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -181,6 +181,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_TXQS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
+   case PIPE_CAP_SHAREABLE_SHADERS:
       return 1;
    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
       return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
@@ -203,7 +204,6 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
-   case PIPE_CAP_SHAREABLE_SHADERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nvc0/nvc0_state.c

@@ -680,6 +680,9 @@ nvc0_sp_state_create(struct pipe_context *pipe,
    if (cso->stream_output.num_outputs)
       prog->pipe.stream_output = cso->stream_output;
 
+   prog->translated = nvc0_program_translate(
+      prog, nvc0_context(pipe)->screen->base.device->chipset);
+
    return (void *)prog;
 }
 

src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c

@@ -606,6 +606,9 @@ nvc0_switch_pipe_context(struct nvc0_context *ctx_to)
       ctx_to->constbuf_dirty[s] = (1 << NVC0_MAX_PIPE_CONSTBUFS) - 1;
    }
 
+   /* Reset tfb as the shader that owns it may have been deleted. */
+   ctx_to->state.tfb = NULL;
+
    if (!ctx_to->vertex)
       ctx_to->dirty &= ~(NVC0_NEW_VERTEX | NVC0_NEW_ARRAYS);
    if (!ctx_to->idxbuf.buffer)