ast_function::hir consists of bits pulled out of
ast_function_definition::hir. In fact, the later uses the former to
do a lot of its processing. Several class private data fields were
added to ast_function to facilitate communicate between the two.
This causes the following tests to pass:
glslparsertest/shaders/CorrectModule.frag
This causes the following tests to fail. These shaders were
previously failing to compile, but they were all failing for the wrong
reasons.
glslparsertest/shaders/function9.frag
glslparsertest/shaders/function10.frag
The two places that were still passing NULL had a state pointer to
pass. Not passing it in these places prevented termination of
compilation of erroneous programs.
The ast_expression_bin subclass is used for all binary expressions
such as addition, subtraction, and comparisons. Several other
subclasses are soon to follow.
