i965/fs: Lower gl_VertexID and friends to inputs at the NIR level

NIR calls these system values but they come in from the VF unit as
vertex data.  It's terribly convenient to just be able to treat them as
such in the back-end.

Reviewed-by: Alejandro Piñeiro <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 0 insertions, 38 deletions

diff --git a/src/intel/compiler/brw_fs_visitor.cpp b/src/intel/compiler/brw_fs_visitor.cpp
index dd09fbdd64c..758c8bf44a9 100644
--- a/src/intel/compiler/brw_fs_visitor.cpp
+++ b/src/intel/compiler/brw_fs_visitor.cpp
@@ -32,44 +32,6 @@
 
 using namespace brw;
 
-fs_reg *
-fs_visitor::emit_vs_system_value(int location)
-{
-   fs_reg *reg = new(this->mem_ctx)
-      fs_reg(ATTR, 4 * _mesa_bitcount_64(nir->info.inputs_read),
-             BRW_REGISTER_TYPE_D);
-
-   switch (location) {
-   case SYSTEM_VALUE_BASE_VERTEX:
-      reg->offset = 0;
-      break;
-   case SYSTEM_VALUE_BASE_INSTANCE:
-      reg->offset = REG_SIZE;
-      break;
-   case SYSTEM_VALUE_VERTEX_ID:
-      unreachable("should have been lowered");
-   case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
-      reg->offset = 2 * REG_SIZE;
-      break;
-   case SYSTEM_VALUE_INSTANCE_ID:
-      reg->offset = 3 * REG_SIZE;
-      break;
-   case SYSTEM_VALUE_DRAW_ID:
-      if (nir->info.system_values_read &
-          (BITFIELD64_BIT(SYSTEM_VALUE_BASE_VERTEX) |
-           BITFIELD64_BIT(SYSTEM_VALUE_BASE_INSTANCE) |
-           BITFIELD64_BIT(SYSTEM_VALUE_VERTEX_ID_ZERO_BASE) |
-           BITFIELD64_BIT(SYSTEM_VALUE_INSTANCE_ID)))
-         reg->nr += 4;
-      reg->offset = 0;
-      break;
-   default:
-      unreachable("not reached");
-   }
-
-   return reg;
-}
-
 /* Sample from the MCS surface attached to this multisample texture. */
 fs_reg
 fs_visitor::emit_mcs_fetch(const fs_reg &coordinate, unsigned components,