i965: Print instructions' children during scheduling debugging.

Useful for tracking down problems in dependency calculations.

Scheduling debugging now prints:

clock    2, scheduled: linterp vgrf5, hw_reg2, hw_reg3, hw_reg0,
        child 0, 53 parents: fb_write (null), (null), (null), (null),
        child 1, 2 parents: tex vgrf4, vgrf5, (null), (null),
        child 2, 52 parents: placeholder_halt (null), (null), (null), (null),
clock    4, scheduled: linterp vgrf5+1, hw_reg2, hw_reg3, hw_reg0+16,
        child 0, 52 parents: fb_write (null), (null), (null), (null),
        child 1, 1 parents: tex vgrf4, vgrf5, (null), (null),
                now available
        child 2, 51 parents: placeholder_halt (null), (null), (null), (null),

Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
index b24c38c351d304a9c6805c4b46d3043569393e9b..84b74ff29460fc18905075831d95af9f7398234e 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
+++ b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
@@ -1065,11 +1065,15 @@ instruction_scheduler::schedule_instructions(backend_instruction *next_block_hea
         child->unblocked_time = MAX2(child->unblocked_time,
                                      time + chosen->child_latency[i]);
 
+         if (debug) {
+            printf("\tchild %d, %d parents: ", i, child->parent_count);
+            bv->dump_instruction(child->inst);
+         }
+
         child->parent_count--;
         if (child->parent_count == 0) {
             if (debug) {
-               printf("now available: ");
-               bv->dump_instruction(child->inst);
+               printf("\t\tnow available\n");
             }
            instructions.push_tail(child);
         }