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authormarha <marha@users.sourceforge.net>2011-01-13 22:07:24 +0000
committermarha <marha@users.sourceforge.net>2011-01-13 22:07:24 +0000
commitdc54712d6b67dac7fc745cf3b9019b2c4c81f193 (patch)
tree002b3fd0e0233fe3e6c57d603a8471794f5ba922 /mesalib/src/glsl/ir.h
parentca14143b18b939ee4506936e77478f8c593802b5 (diff)
parenta0a46bd55d7cbbf70757a29c067e21b70ac4e2df (diff)
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svn merge ^/branches/released .
Diffstat (limited to 'mesalib/src/glsl/ir.h')
-rw-r--r--mesalib/src/glsl/ir.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/mesalib/src/glsl/ir.h b/mesalib/src/glsl/ir.h
index d11047f1d..f3a565f2e 100644
--- a/mesalib/src/glsl/ir.h
+++ b/mesalib/src/glsl/ir.h
@@ -295,6 +295,15 @@ public:
unsigned invariant:1;
/**
+ * Has this variable been used for reading or writing?
+ *
+ * Several GLSL semantic checks require knowledge of whether or not a
+ * variable has been used. For example, it is an error to redeclare a
+ * variable as invariant after it has been used.
+ */
+ unsigned used:1;
+
+ /**
* Storage class of the variable.
*
* \sa ir_variable_mode