From: Eric Anholt <eric@anholt.net>
Date: Thu, 14 Oct 2010 05:39:06 +0000 (-0700)
Subject: i965: Update the live interval when coalescing regs.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b8613d70da34217b98edb9ac9e0a4c9a6598d0b3;p=mesa.git

i965: Update the live interval when coalescing regs.
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c0fee114a86..e2c7dbde6a5 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -2563,6 +2563,10 @@ fs_visitor::register_coalesce()
 	 continue;
       }
 
+      /* Update live interval so we don't have to recalculate. */
+      this->virtual_grf_use[inst->src[0].reg] = MAX2(virtual_grf_use[inst->src[0].reg],
+						     virtual_grf_use[inst->dst.reg]);
+
       /* Rewrite the later usage to point at the source of the move to
        * be removed.
        */