nir: Return progress from nir_lower_to_source_mods().
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
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@ -2542,7 +2542,7 @@ void nir_lower_bitmap(nir_shader *shader, const nir_lower_bitmap_options *option
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void nir_lower_atomics(nir_shader *shader,
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const struct gl_shader_program *shader_program);
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void nir_lower_to_source_mods(nir_shader *shader);
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bool nir_lower_to_source_mods(nir_shader *shader);
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bool nir_lower_gs_intrinsics(nir_shader *shader);
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@ -36,6 +36,8 @@
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static bool
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nir_lower_to_source_mods_block(nir_block *block)
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{
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bool progress = false;
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nir_foreach_instr(instr, block) {
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if (instr->type != nir_instr_type_alu)
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continue;
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@ -91,6 +93,8 @@ nir_lower_to_source_mods_block(nir_block *block)
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if (list_empty(&parent->dest.dest.ssa.uses) &&
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list_empty(&parent->dest.dest.ssa.if_uses))
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nir_instr_remove(&parent->instr);
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progress = true;
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}
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switch (alu->op) {
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@ -161,6 +165,7 @@ nir_lower_to_source_mods_block(nir_block *block)
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continue;
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alu->dest.saturate = true;
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progress = true;
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nir_foreach_use(child_src, &alu->dest.dest.ssa) {
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assert(child_src->is_ssa);
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@ -176,17 +181,35 @@ nir_lower_to_source_mods_block(nir_block *block)
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}
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}
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return true;
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return progress;
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}
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void
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static bool
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nir_lower_to_source_mods_impl(nir_function_impl *impl)
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{
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bool progress = false;
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nir_foreach_block(block, impl) {
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progress |= nir_lower_to_source_mods_block(block);
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}
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if (progress)
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nir_metadata_preserve(impl, nir_metadata_block_index |
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nir_metadata_dominance);
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return progress;
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}
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bool
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nir_lower_to_source_mods(nir_shader *shader)
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{
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bool progress = false;
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nir_foreach_function(function, shader) {
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if (function->impl) {
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nir_foreach_block(block, function->impl) {
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nir_lower_to_source_mods_block(block);
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}
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progress |= nir_lower_to_source_mods_impl(function->impl);
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}
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}
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return progress;
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}
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