nir: gather info whether a shader uses demote_to_helper
Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4047>
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@@ -200,6 +200,8 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader,
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switch (instr->intrinsic) {
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case nir_intrinsic_demote:
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case nir_intrinsic_demote_if:
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shader->info.fs.uses_demote = true;
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/* fallthrough: quads with helper lanes only might be discarded entirely */
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case nir_intrinsic_discard:
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case nir_intrinsic_discard_if:
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assert(shader->info.stage == MESA_SHADER_FRAGMENT);
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@@ -389,6 +391,7 @@ nir_shader_gather_info(nir_shader *shader, nir_function_impl *entrypoint)
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if (shader->info.stage == MESA_SHADER_FRAGMENT) {
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shader->info.fs.uses_sample_qualifier = false;
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shader->info.fs.uses_discard = false;
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shader->info.fs.uses_demote = false;
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shader->info.fs.needs_helper_invocations = false;
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}
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@@ -217,6 +217,7 @@ typedef struct shader_info {
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struct {
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bool uses_discard:1;
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bool uses_demote:1;
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/**
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* True if this fragment shader requires helper invocations. This
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