llvmpipe: Don't waste time interpolating unused input channels.

1 files changed, 13 insertions, 1 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c
index 21e90fe00ec..d3f2eb2421e 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_fs.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c
@@ -760,7 +760,7 @@ generate_fragment(struct llvmpipe_context *lp,
    generate_pos0(builder, x, y, &x0, &y0);
 
    lp_build_interp_soa_init(&interp, 
-                            shader->base.tokens,
+                            &shader->info,
                             key->flatshade,
                             builder, fs_type,
                             a0_ptr, dadx_ptr, dady_ptr,
@@ -1013,8 +1013,20 @@ llvmpipe_create_fs_state(struct pipe_context *pipe,
    shader->base.tokens = tgsi_dup_tokens(templ->tokens);
 
    if (LP_DEBUG & DEBUG_TGSI) {
+      unsigned attrib;
       debug_printf("llvmpipe: Create fragment shader %p:\n", (void *) shader);
       tgsi_dump(templ->tokens, 0);
+      debug_printf("usage masks:\n");
+      for (attrib = 0; attrib < shader->info.num_inputs; ++attrib) {
+         unsigned usage_mask = shader->info.input_usage_mask[attrib];
+         debug_printf("  IN[%u].%s%s%s%s\n",
+                      attrib,
+                      usage_mask & TGSI_WRITEMASK_X ? "x" : "",
+                      usage_mask & TGSI_WRITEMASK_Y ? "y" : "",
+                      usage_mask & TGSI_WRITEMASK_Z ? "z" : "",
+                      usage_mask & TGSI_WRITEMASK_W ? "w" : "");
+      }
+      debug_printf("\n");
    }
 
    return shader;