From: Eric Anholt <eric@anholt.net>
Date: Tue, 9 Apr 2013 01:46:23 +0000 (-0700)
Subject: i965/fs: Remove incorrect note of writing attr in centroid workaround.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=36d0fde603015066fce0ff37fd9be609800243e8;p=mesa.git

i965/fs: Remove incorrect note of writing attr in centroid workaround.

This instruction doesn't update its IR destination, it just moves from
payload to f0.  This caused the dead code elimination pass I'm adding to
dead-code-eliminate the first step of interpolation.

Reviewed-by: Matt Turner <mattst88@gmail.com>
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index f9a50b1c187..09817b7058b 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1064,7 +1064,7 @@ fs_visitor::emit_general_interpolation(ir_variable *ir)
                    * unlit, replace the centroid data with non-centroid
                    * data.
                    */
-                  emit(FS_OPCODE_MOV_DISPATCH_TO_FLAGS, attr);
+                  emit(FS_OPCODE_MOV_DISPATCH_TO_FLAGS);
                   fs_inst *inst = emit_linterp(attr, fs_reg(interp),
                                                interpolation_mode, false);
                   inst->predicate = BRW_PREDICATE_NORMAL;