Mesa (master): i965: Add performance debug for register spilling.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 4cfb9e30000eea9cb1f316ace9347083b619cdb0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4cfb9e30000eea9cb1f316ace9347083b619cdb0

Author: Eric Anholt <eric at anholt.net>
Date:   Thu Jul 12 13:08:20 2012 -0700

i965: Add performance debug for register spilling.

Reviewed-by: Jordan Justen <jordan.l.justen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_vs.c |    4 ++++
 src/mesa/drivers/dri/i965/brw_wm.c |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c
index 1e19183..2ad4134 100644
--- a/src/mesa/drivers/dri/i965/brw_vs.c
+++ b/src/mesa/drivers/dri/i965/brw_vs.c
@@ -259,6 +259,10 @@ do_vs_prog(struct brw_context *brw,
 
    /* Scratch space is used for register spilling */
    if (c.last_scratch) {
+      perf_debug("Vertex shader triggered register spilling.  "
+                 "Try reducing the number of live vec4 values to "
+                 "improve performance.\n");
+
       c.prog_data.total_scratch = brw_get_scratch_size(c.last_scratch);
 
       brw_get_scratch_bo(intel, &brw->vs.scratch_bo,
diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index 5ab0547..3abc696 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -321,6 +321,10 @@ bool do_wm_prog(struct brw_context *brw,
 
    /* Scratch space is used for register spilling */
    if (c->last_scratch) {
+      perf_debug("Fragment shader triggered register spilling.  "
+                 "Try reducing the number of live scalar values to "
+                 "improve performance.\n");
+
       c->prog_data.total_scratch = brw_get_scratch_size(c->last_scratch);
 
       brw_get_scratch_bo(intel, &brw->wm.scratch_bo,