Mesa (master): i965/fs: Allow copy propagating into new surface access opcodes

[Kristian Høgsberg]

Module: Mesa
Branch: master
Commit: 8f60dc83f7edba51037662c2637f830feeea3fc6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8f60dc83f7edba51037662c2637f830feeea3fc6

Author: Kristian Høgsberg Kristensen <krh at bitplanet.net>
Date:   Tue Oct 20 23:22:27 2015 -0700

i965/fs: Allow copy propagating into new surface access opcodes

Reviewed-by: Francisco Jerez <currojerez at riseup.net>
Signed-off-by: Kristian Høgsberg Kristensen <krh at bitplanet.net>

---

 src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
index 5589716..97e206d 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
@@ -612,6 +612,21 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry)
          }
          break;
 
+      case SHADER_OPCODE_UNTYPED_ATOMIC:
+      case SHADER_OPCODE_UNTYPED_SURFACE_READ:
+      case SHADER_OPCODE_UNTYPED_SURFACE_WRITE:
+      case SHADER_OPCODE_TYPED_ATOMIC:
+      case SHADER_OPCODE_TYPED_SURFACE_READ:
+      case SHADER_OPCODE_TYPED_SURFACE_WRITE:
+         /* We only propagate into the surface argument of the
+          * instruction. Everything else goes through LOAD_PAYLOAD.
+          */
+         if (i == 1) {
+            inst->src[i] = val;
+            progress = true;
+         }
+         break;
+
       case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD:
       case SHADER_OPCODE_BROADCAST:
          inst->src[i] = val;