glsl: Copy function out to temp if we don't directly ref a variable
Otherwise we can end up with IR that looks like this: ( (declare (temporary ) vec4 f@8) (assign (xyzw) (var_ref f@8) (var_ref f) ) (call f16 ((swiz y (var_ref f@8) ))) (assign (xyzw) (var_ref f) (var_ref f@8) ) )) When we really need: (declare (temporary ) float inout_tmp) (assign (x) (var_ref inout_tmp) (swiz y (var_ref f) )) (call f16 ((var_ref inout_tmp) )) (assign (y) (var_ref f) (swiz y (swiz xxxx (var_ref inout_tmp) ))) (declare (temporary ) void void_var) The GLSL IR function inlining code seemed to produce correct code even without this but we need the correct IR for GLSL IR -> NIR to be able to understand whats going on. Reviewed-by:Kenneth Graunke <kenneth@whitecape.org> (cherry picked from commit 76c27e47) Nominated-by:
Matt Turner <mattst88@gmail.com>
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