From 4dcfb924176eea4f0ac892c8ec8d38090dd59d2a Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Sat, 29 Mar 2014 17:44:45 -0700 Subject: [PATCH] i965/gs: Add dummy source to prepare_channel_masks instruction. The generator uses its destination as a source implicitly, which breaks some assumptions in dead code elimination. Giving the instruction a source allows us to reason about it better. --- src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp index 13d6d385a2f..1321a94d658 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp @@ -408,7 +408,8 @@ vec4_gs_visitor::emit_control_data_bits() src_reg channel_mask(this, glsl_type::uint_type); inst = emit(SHL(dst_reg(channel_mask), one, channel)); inst->force_writemask_all = true; - emit(GS_OPCODE_PREPARE_CHANNEL_MASKS, dst_reg(channel_mask)); + emit(GS_OPCODE_PREPARE_CHANNEL_MASKS, dst_reg(channel_mask), + channel_mask); emit(GS_OPCODE_SET_CHANNEL_MASKS, mrf_reg, channel_mask); } -- 2.30.2