[Mesa-dev] [PATCH 3/3] i965: Stop setting up a 1:1 "attrib" member in our vertex inputs.

[Eric Anholt]

It's just the array index, so we can just go look at the array and see
which element we are.

No significant performance difference (n=140)
---
 src/mesa/drivers/dri/i965/brw_context.h      | 2 --
 src/mesa/drivers/dri/i965/brw_draw.c         | 1 -
 src/mesa/drivers/dri/i965/brw_draw_upload.c  | 2 +-
 src/mesa/drivers/dri/i965/gen8_draw_upload.c | 2 +-
 4 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index f8ca58f..82b38fc 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -833,8 +833,6 @@ struct brw_vertex_element {
 
    int buffer;
 
-   /** The corresponding Mesa vertex attribute */
-   gl_vert_attrib attrib;
    /** Offset of the first element within the buffer object */
    unsigned int offset;
 };
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index ef0f273..984d230 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -291,7 +291,6 @@ static void brw_merge_inputs( struct brw_context *brw,
    for (i = 0; i < VERT_ATTRIB_MAX; i++) {
       brw->vb.inputs[i].buffer = -1;
       brw->vb.inputs[i].glarray = arrays[i];
-      brw->vb.inputs[i].attrib = (gl_vert_attrib) i;
    }
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index 2b56cde..45e9d3f 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -713,7 +713,7 @@ static void brw_emit_vertices(struct brw_context *brw)
       uint32_t comp2 = BRW_VE1_COMPONENT_STORE_SRC;
       uint32_t comp3 = BRW_VE1_COMPONENT_STORE_SRC;
 
-      if (input->attrib == VERT_ATTRIB_EDGEFLAG) {
+      if (input == &brw->vb.inputs[VERT_ATTRIB_EDGEFLAG]) {
          /* Gen6+ passes edgeflag as sideband along with the vertex, instead
           * of in the VUE.  We have to upload it sideband as the last vertex
           * element according to the B-Spec.
diff --git a/src/mesa/drivers/dri/i965/gen8_draw_upload.c b/src/mesa/drivers/dri/i965/gen8_draw_upload.c
index 83bc240..0272892 100644
--- a/src/mesa/drivers/dri/i965/gen8_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/gen8_draw_upload.c
@@ -139,7 +139,7 @@ gen8_emit_vertices(struct brw_context *brw)
        * glEdgeFlagPointer, on the other hand, gives us an unnormalized
        * integer ubyte.  Just rewrite that to convert to a float.
        */
-      if (input->attrib == VERT_ATTRIB_EDGEFLAG) {
+      if (input == &brw->vb.inputs[VERT_ATTRIB_EDGEFLAG]) {
          /* Gen6+ passes edgeflag as sideband along with the vertex, instead
           * of in the VUE.  We have to upload it sideband as the last vertex
           * element according to the B-Spec.
-- 
1.9.1