From: Kenneth Graunke <kenneth@whitecape.org>
Date: Sun, 24 Sep 2017 19:42:52 +0000 (-0700)
Subject: i965: Support copy propagating of untyped atomic surface indexes.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a553eb0fdfbf62a904abe28acc0339815fc3217a;p=mesa.git

i965: Support copy propagating of untyped atomic surface indexes.

In the vec4 backend, SHADER_OPCODE_UNTYPED_ATOMIC's src[1] is the
surface index.  We want to copy propagate so we can use an immediate
message descriptor, rather than an indirect send.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
---

diff --git a/src/intel/compiler/brw_vec4_copy_propagation.cpp b/src/intel/compiler/brw_vec4_copy_propagation.cpp
index c1ae32a2936..63155ecdfb0 100644
--- a/src/intel/compiler/brw_vec4_copy_propagation.cpp
+++ b/src/intel/compiler/brw_vec4_copy_propagation.cpp
@@ -190,6 +190,13 @@ try_constant_propagate(const struct gen_device_info *devinfo,
       inst->src[arg] = value;
       return true;
 
+   case SHADER_OPCODE_UNTYPED_ATOMIC:
+      if (arg == 1) {
+         inst->src[arg] = value;
+         return true;
+      }
+      break;
+
    case SHADER_OPCODE_POW:
    case SHADER_OPCODE_INT_QUOTIENT:
    case SHADER_OPCODE_INT_REMAINDER: