From: Kenneth Graunke <kenneth@whitecape.org>
Date: Sat, 10 Aug 2013 00:50:03 +0000 (-0700)
Subject: i965/fs: Switch to a do-while loop in copy propagation dataflow.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0225dea6c49674a27d5be6e933447d8a4ba5a82e;p=mesa.git

i965/fs: Switch to a do-while loop in copy propagation dataflow.

The fixed-point algorithm needs to run at least once, so a do-while loop
is more natural.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
---

diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
index ddf21df5d28..663b61f3859 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
@@ -162,9 +162,9 @@ fs_copy_prop_dataflow::setup_kills()
 void
 fs_copy_prop_dataflow::run()
 {
-   bool cont = true;
+   bool cont;
 
-   while (cont) {
+   do {
       cont = false;
 
       for (int b = 0; b < cfg->num_blocks; b++) {
@@ -194,7 +194,7 @@ fs_copy_prop_dataflow::run()
             }
          }
       }
-   }
+   } while (cont);
 }
 
 bool