From 636256cdc78dd46714d9cfa2c96adfc74930101e Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Mon, 2 Apr 2018 16:15:39 -0700 Subject: nir: Remove deref chain support from dead_variables Acked-by: Rob Clark Acked-by: Bas Nieuwenhuizen Acked-by: Dave Airlie Reviewed-by: Kenneth Graunke --- src/compiler/nir/nir_remove_dead_variables.c | 86 +--------------------------- 1 file changed, 3 insertions(+), 83 deletions(-) (limited to 'src/compiler') diff --git a/src/compiler/nir/nir_remove_dead_variables.c b/src/compiler/nir/nir_remove_dead_variables.c index 41dddd9387f..acb1540129f 100644 --- a/src/compiler/nir/nir_remove_dead_variables.c +++ b/src/compiler/nir/nir_remove_dead_variables.c @@ -76,57 +76,6 @@ add_var_use_deref(nir_deref_instr *deref, struct set *live) _mesa_set_add(live, deref->var); } -static void -add_var_use_intrinsic(nir_intrinsic_instr *instr, struct set *live, - nir_variable_mode modes) -{ - unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables; - - switch (instr->intrinsic) { - case nir_intrinsic_copy_var: - _mesa_set_add(live, instr->variables[1]->var); - /* Fall through */ - case nir_intrinsic_store_var: { - /* The first source in both copy_var and store_var is the destination. - * If the variable is a local that never escapes the shader, then we - * don't mark it as live for just a store. - */ - nir_variable_mode mode = instr->variables[0]->var->data.mode; - if (!(mode & (nir_var_local | nir_var_global | nir_var_shared))) - _mesa_set_add(live, instr->variables[0]->var); - break; - } - - /* This pass can't be used on I/O variables after they've been lowered. */ - case nir_intrinsic_load_input: - assert(!(modes & nir_var_shader_in)); - break; - case nir_intrinsic_store_output: - assert(!(modes & nir_var_shader_out)); - break; - - default: - for (unsigned i = 0; i < num_vars; i++) { - _mesa_set_add(live, instr->variables[i]->var); - } - break; - } -} - -static void -add_var_use_tex(nir_tex_instr *instr, struct set *live) -{ - if (instr->texture != NULL) { - nir_variable *var = instr->texture->var; - _mesa_set_add(live, var); - } - - if (instr->sampler != NULL) { - nir_variable *var = instr->sampler->var; - _mesa_set_add(live, var); - } -} - static void add_var_use_shader(nir_shader *shader, struct set *live, nir_variable_mode modes) { @@ -134,23 +83,8 @@ add_var_use_shader(nir_shader *shader, struct set *live, nir_variable_mode modes if (function->impl) { nir_foreach_block(block, function->impl) { nir_foreach_instr(instr, block) { - switch(instr->type) { - case nir_instr_type_deref: + if (instr->type == nir_instr_type_deref) add_var_use_deref(nir_instr_as_deref(instr), live); - break; - - case nir_instr_type_intrinsic: - add_var_use_intrinsic(nir_instr_as_intrinsic(instr), live, - modes); - break; - - case nir_instr_type_tex: - add_var_use_tex(nir_instr_as_tex(instr), live); - break; - - default: - break; - } } } } @@ -164,22 +98,6 @@ remove_dead_var_writes(nir_shader *shader, struct set *live) if (!function->impl) continue; - nir_foreach_block(block, function->impl) { - nir_foreach_instr_safe(instr, block) { - if (instr->type != nir_instr_type_intrinsic) - continue; - - nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); - if (intrin->intrinsic != nir_intrinsic_copy_var && - intrin->intrinsic != nir_intrinsic_store_var) - continue; - - /* Stores to dead variables need to be removed */ - if (intrin->variables[0]->var->data.mode == 0) - nir_instr_remove(instr); - } - } - nir_foreach_block(block, function->impl) { nir_foreach_instr_safe(instr, block) { switch (instr->type) { @@ -246,6 +164,8 @@ nir_remove_dead_variables(nir_shader *shader, nir_variable_mode modes) struct set *live = _mesa_set_create(NULL, _mesa_hash_pointer, _mesa_key_pointer_equal); + nir_assert_unlowered_derefs(shader, nir_lower_all_derefs); + add_var_use_shader(shader, live, modes); if (modes & nir_var_uniform) -- cgit v1.2.3