From: Eric Anholt <eric@anholt.net>
Date: Tue, 24 Aug 2010 22:30:42 +0000 (-0700)
Subject: glsl: Don't dead-code eliminate a uniform initializer.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7de4d8fe11c53e59265b8a4252ab9940ffcc9929;p=mesa.git

glsl: Don't dead-code eliminate a uniform initializer.

Partial fix for glsl-uniform-initializer-5.
---

diff --git a/src/glsl/ir_dead_code.cpp b/src/glsl/ir_dead_code.cpp
index 7ff580d5380..5cf5e99add4 100644
--- a/src/glsl/ir_dead_code.cpp
+++ b/src/glsl/ir_dead_code.cpp
@@ -92,6 +92,14 @@ do_dead_code(exec_list *instructions)
 	 /* If there are no assignments or references to the variable left,
 	  * then we can remove its declaration.
 	  */
+
+	 /* uniform initializers are precious, and could get used by another
+	  * stage.
+	  */
+	 if (entry->var->mode == ir_var_uniform &&
+	     entry->var->constant_value)
+	    continue;
+
 	 entry->var->remove();
 	 progress = true;