From ab5bf7e48d5849b0333eb4d54dd5c4dec5a92af8 Mon Sep 17 00:00:00 2001
From: James Brodman <james.brodman@intel.com>
Date: Mon, 2 Mar 2015 10:55:12 -0800
Subject: [PATCH] Add assignments to Uniform as an unsafe thing when checking
 to run with mask all off

---
 ast.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/ast.cpp b/ast.cpp
index 00e81aa5..aa6da5eb 100644
--- a/ast.cpp
+++ b/ast.cpp
@@ -477,6 +477,20 @@ lCheckAllOffSafety(ASTNode *node, void *data) {
         return false;
     }
 
+    /*
+      Don't allow turning if/else to straight-line-code if we 
+      assign to a uniform.
+    */
+    AssignExpr *ae;
+    if ((ae = dynamic_cast<AssignExpr *>(node)) != NULL) {
+      if (ae->GetType()) {
+        if (ae->GetType()->IsUniformType()) {
+          *okPtr = false;
+          return false;
+        }
+      }
+    }
+
     return true;
 }