Mesa (master): i965/fs: Short-circuit a loop in live variable analysis.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 701e9af15f9cedd8c1dbad417d195ee2a46e07bf
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=701e9af15f9cedd8c1dbad417d195ee2a46e07bf

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Aug  6 00:47:00 2013 -0700

i965/fs: Short-circuit a loop in live variable analysis.

This has no functional effect, but should make subsequent changes a
little simpler.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Eric Anholt <eric at anholt.net>

---

 .../drivers/dri/i965/brw_fs_live_variables.cpp     |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp b/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
index f5daab2..18ba30a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
@@ -64,12 +64,13 @@ fs_live_variables::setup_def_use()
 
 	 /* Set use[] for this instruction */
 	 for (unsigned int i = 0; i < 3; i++) {
-	    if (inst->src[i].file == GRF) {
-	       int reg = inst->src[i].reg;
+	    if (inst->src[i].file != GRF)
+               continue;
 
-	       if (!BITSET_TEST(bd[b].def, reg))
-		  BITSET_SET(bd[b].use, reg);
-	    }
+            int reg = inst->src[i].reg;
+
+            if (!BITSET_TEST(bd[b].def, reg))
+               BITSET_SET(bd[b].use, reg);
 	 }
 
 	 /* Check for unconditional writes to whole registers. These