From: Aras Pranckevicius <aras@unity3d.com>
Date: Thu, 30 Sep 2010 09:47:31 +0000 (+0300)
Subject: glsl: fix crash in loop analysis when some controls can't be determined
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d67df5dd9db1cede92f1b177c890f83809bb4582;p=mesa.git

glsl: fix crash in loop analysis when some controls can't be determined

Fixes loop-07.frag.
---

diff --git a/src/glsl/loop_controls.cpp b/src/glsl/loop_controls.cpp
index 2ef3d305254..b528810f40d 100644
--- a/src/glsl/loop_controls.cpp
+++ b/src/glsl/loop_controls.cpp
@@ -85,6 +85,9 @@ int
 calculate_iterations(ir_rvalue *from, ir_rvalue *to, ir_rvalue *increment,
 		     enum ir_expression_operation op)
 {
+   if (from == NULL || to == NULL || increment == NULL)
+      return -1;
+
    void *mem_ctx = talloc_init("%s", __func__);
 
    ir_expression *const sub =