Module: Mesa
Branch: master
Commit: 4e2d22c5a723f8a52ede916d170f4aa9a4f96fbb
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=4e2d22c5a723f8a52ede916d170f4aa9a4f96fbb
Author: Kenneth Graunke <kenn...@whitecape.org>
Date: Fri Apr 8 18:49:22 2016 -0700
i965: Mark URB reads as volatile.
They can be affected by URB writes.
In the upcoming scalar TCS backend, this prevents read-modify-write
cycles from being broken by CSE removing reads.
Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
Reviewed-by: Eduardo Lima Mitev <el...@igalia.com>
---
src/mesa/drivers/dri/i965/brw_shader.cpp | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp
b/src/mesa/drivers/dri/i965/brw_shader.cpp
index b3aade1..d9e654c 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -961,6 +961,9 @@ backend_instruction::is_volatile() const
case SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL:
case SHADER_OPCODE_TYPED_SURFACE_READ:
case SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL:
+ case SHADER_OPCODE_URB_READ_SIMD8:
+ case SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT:
+ case VEC4_OPCODE_URB_READ:
return true;
default:
return false;
_______________________________________________
mesa-commit mailing list
mesa-commit@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-commit
