---
src/intel/compiler/brw_shader.cpp | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/intel/compiler/brw_shader.cpp
b/src/intel/compiler/brw_shader.cpp
index 34b8f3acf93..5cb91e0dce9 100644
--- a/src/intel/compiler/brw_shader.cpp
+++ b/src/intel/compiler/brw_shader.cpp
@@ -1007,6 +1007,18 @@ backend_instruction::has_side_effects() const
case SHADER_OPCODE_SEND:
return send_has_side_effects;
+ case SHADER_OPCODE_TYPED_SURFACE_READ:
+ case SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL:
+ case SHADER_OPCODE_UNTYPED_SURFACE_READ:
+ case SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL:
+ case SHADER_OPCODE_BYTE_SCATTERED_READ:
+ case SHADER_OPCODE_BYTE_SCATTERED_READ_LOGICAL:
+ /* The back-end compilers don't know how to properly re-order reads with
+ * respect to writes. In order to prevent accidental re-ordering and
+ * CSE, flag them as having side-effects.
+ */
+ return true;
+
case SHADER_OPCODE_UNTYPED_ATOMIC:
case SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL:
case SHADER_OPCODE_UNTYPED_ATOMIC_FLOAT:
--
2.19.1
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