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glsl: Add ir_demote

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To represent the new `demote` keyword when using
EXT_demote_to_helper_invocation extension.  Most of the changes are to
include it in the visitors.

Demote is not considered a control flow, so also include an empty
visit member function in ir_control_flow_visitor.

Only NIR actually supports `demote`, so assert the translations for
TGSI and Mesa's gl_program -- since the demote is not expected to
appear for those.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Caio Marcelo de Oliveira Filho
2019-09-20 09:27:00 -07:00
parent c81b912eb7
commit af1a6f0f77
11 changed files with 95 additions and 0 deletions
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7
src/mesa/program/ir_to_mesa.cpp
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@@ -252,6 +252,7 @@ public:
virtual void visit(ir_call *);
virtual void visit(ir_return *);
virtual void visit(ir_discard *);
virtual void visit(ir_demote *);
virtual void visit(ir_texture *);
virtual void visit(ir_if *);
virtual void visit(ir_emit_vertex *);
@@ -2201,6 +2202,12 @@ ir_to_mesa_visitor::visit(ir_discard *ir)
emit(ir, OPCODE_KIL, undef_dst, this->result);
}
void
ir_to_mesa_visitor::visit(ir_demote *ir)
{
assert(!"demote statement unsupported");
}
void
ir_to_mesa_visitor::visit(ir_if *ir)
{