Mesa (master): i965: Stop doing remapping of "special" regs.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: afe3d1556f6b77031f7025309511a0eea2a3e8df
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=afe3d1556f6b77031f7025309511a0eea2a3e8df

Author: Eric Anholt <eric at anholt.net>
Date:   Tue May  6 15:19:55 2014 -0700

i965: Stop doing remapping of "special" regs.

Now that we aren't using pixel_[xy] in live variables, nothing is looking
at these regs after the visitor stage.

Reviewed-by: Matt Turner <mattst88 at gmail.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_fs.cpp |   37 ----------------------------------
 1 file changed, 37 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c550c41..6b1b866 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1740,34 +1740,6 @@ fs_visitor::compact_virtual_grfs()
       }
    }
 
-   /* In addition to registers used in instructions, fs_visitor keeps
-    * direct references to certain special values which must be patched:
-    */
-   struct {
-      fs_reg *reg;
-      unsigned count;
-   } special[] = {
-      { &frag_depth, 1 },
-      { &pixel_x, 1 },
-      { &pixel_y, 1 },
-      { &pixel_w, 1 },
-      { &wpos_w, 1 },
-      { &dual_src_output, 1 },
-      { outputs, ARRAY_SIZE(outputs) },
-      { delta_x, ARRAY_SIZE(delta_x) },
-      { delta_y, ARRAY_SIZE(delta_y) },
-      { &sample_mask, 1 },
-      { &shader_start_time, 1 },
-   };
-
-   /* Treat all special values as used, to be conservative */
-   for (unsigned i = 0; i < ARRAY_SIZE(special); i++) {
-      for (unsigned j = 0; j < special[i].count; j++) {
-         if (special[i].reg[j].file == GRF)
-            remap_table[special[i].reg[j].reg] = 0;
-      }
-   }
-
    /* Compact the GRF arrays. */
    int new_index = 0;
    for (int i = 0; i < this->virtual_grf_count; i++) {
@@ -1793,15 +1765,6 @@ fs_visitor::compact_virtual_grfs()
             inst->src[i].reg = remap_table[inst->src[i].reg];
       }
    }
-
-   /* Patch all the references to special values */
-   for (unsigned i = 0; i < ARRAY_SIZE(special); i++) {
-      for (unsigned j = 0; j < special[i].count; j++) {
-         fs_reg *reg = &special[i].reg[j];
-         if (reg->file == GRF && remap_table[reg->reg] != -1)
-            reg->reg = remap_table[reg->reg];
-      }
-   }
 }
 
 /*