From c588cd2031c134827f15deef147fb1eaf14af028 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 6 Mar 2013 17:12:28 -0800 Subject: i965/fs: Add a comment about about an implementation detail. I was going to fix the code above like the previous commit, but we already had that covered (otherwise all our uniform access would have been broken, unlike just pull constants). Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src') diff --git a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp index d1147f544e4..b8936dcfe7d 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp @@ -310,6 +310,10 @@ fs_visitor::setup_payload_interference(struct ra_graph *g, * node. */ for (int j = 0; j < this->virtual_grf_count; j++) { + /* Note that we use a <= comparison, unlike virtual_grf_interferes(), + * in order to not have to worry about the uniform issue described in + * calculate_live_intervals(). + */ if (this->virtual_grf_def[j] <= payload_last_use_ip[i] || this->virtual_grf_use[j] <= payload_last_use_ip[i]) { ra_add_node_interference(g, first_payload_node + i, j); -- cgit v1.2.3