diff --git a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
index 2698399641a..88c45f74333 100644
--- a/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
+++ b/src/mesa/drivers/dri/i965/brw_schedule_instructions.cpp
@@ -1702,7 +1702,8 @@ instruction_scheduler::run(cfg_t *cfg)
 void
 fs_visitor::schedule_instructions(instruction_scheduler_mode mode)
 {
-   calculate_live_intervals();
+   if (mode != SCHEDULE_POST)
+      calculate_live_intervals();
 
    int grf_count;
    if (mode == SCHEDULE_POST)