From: Matt Turner <mattst88@gmail.com>
Date: Sat, 28 Feb 2015 21:36:21 +0000 (-0800)
Subject: i965: Consider scratch writes to have side effects.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=da20bf068ef0f816968d9bc4dfea81facf0fd680;p=mesa.git

i965: Consider scratch writes to have side effects.

We could do better by tracking scratch reads and writes.

Cc: 10.5 <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88793
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
---

diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index fbb20bc06bb..ec3cfcbd255 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -963,6 +963,7 @@ backend_instruction::has_side_effects() const
 {
    switch (opcode) {
    case SHADER_OPCODE_UNTYPED_ATOMIC:
+   case SHADER_OPCODE_GEN4_SCRATCH_WRITE:
    case SHADER_OPCODE_URB_WRITE_SIMD8:
    case FS_OPCODE_FB_WRITE:
       return true;