glsl2: Add and use new variable mode ir_var_temporary

This is quite a large patch because breaking it into smaller pieces
would result in the tree being intermitently broken.  The big changes
are:

    * Add the ir_var_temporary variable mode

    * Change the ir_variable constructor to take the mode as a
      parameter and correctly specify the mode for all ir_varables.

    * Change the linker to not cross validate ir_var_temporary
      variables.

    * Change the linker to pull all ir_var_temporary variables from
      global scope into 'main'.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/glsl/ir_reader.cpp b/src/glsl/ir_reader.cpp
index a1e5a7ad74..ed68496587 100644
--- a/src/glsl/ir_reader.cpp
+++ b/src/glsl/ir_reader.cpp
@@ -401,7 +401,8 @@ read_declaration(_mesa_glsl_parse_state *st, s_list *list)
       return NULL;
    }
 
-   ir_variable *var = new(ctx) ir_variable(type, var_name->value());
+   ir_variable *var = new(ctx) ir_variable(type, var_name->value(),
+					   ir_var_auto);
 
    foreach_iter(exec_list_iterator, it, quals->subexpressions) {
       s_symbol *qualifier = SX_AS_SYMBOL(it.get());