From: Jason Ekstrand Date: Fri, 18 Dec 2015 20:17:29 +0000 (-0800) Subject: nir: Add a function inlining pass X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8fba4bf79f9caf73a6ee9e724d51fae996ff9161;p=mesa.git nir: Add a function inlining pass --- diff --git a/src/glsl/Makefile.sources b/src/glsl/Makefile.sources index 32fbf6d1b6c..830aacbe5e6 100644 --- a/src/glsl/Makefile.sources +++ b/src/glsl/Makefile.sources @@ -36,6 +36,7 @@ NIR_FILES = \ nir/nir_from_ssa.c \ nir/nir_gather_info.c \ nir/nir_gs_count_vertices.c \ + nir/nir_inline_functions.c \ nir/nir_intrinsics.c \ nir/nir_intrinsics.h \ nir/nir_instr_set.c \ diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h index 05f1fe2f99d..6888eded864 100644 --- a/src/glsl/nir/nir.h +++ b/src/glsl/nir/nir.h @@ -2004,6 +2004,9 @@ bool nir_split_var_copies(nir_shader *shader); bool nir_lower_returns_impl(nir_function_impl *impl); bool nir_lower_returns(nir_shader *shader); +bool nir_inline_functions_impl(nir_function_impl *impl); +bool nir_inline_functions(nir_shader *shader); + void nir_lower_var_copy_instr(nir_intrinsic_instr *copy, void *mem_ctx); void nir_lower_var_copies(nir_shader *shader); diff --git a/src/glsl/nir/nir_inline_functions.c b/src/glsl/nir/nir_inline_functions.c new file mode 100644 index 00000000000..db5317e6f2d --- /dev/null +++ b/src/glsl/nir/nir_inline_functions.c @@ -0,0 +1,138 @@ +/* + * Copyright © 2015 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "nir.h" +#include "nir_builder.h" +#include "nir_control_flow.h" + +struct inline_functions_state { + nir_function_impl *impl; + nir_builder builder; + bool progress; +}; + +static bool +inline_functions_block(nir_block *block, void *void_state) +{ + struct inline_functions_state *state = void_state; + + nir_builder *b = &state->builder; + + /* This is tricky. We're iterating over instructions in a block but, as + * we go, the block and its instruction list are being split into + * pieces. However, this *should* be safe since foreach_safe always + * stashes the next thing in the iteration. That next thing will + * properly get moved to the next block when it gets split, and we + * continue iterating there. + */ + nir_foreach_instr_safe(block, instr) { + if (instr->type != nir_instr_type_call) + continue; + + state->progress = true; + + nir_call_instr *call = nir_instr_as_call(instr); + assert(call->callee->impl); + + nir_function_impl *callee_copy = + nir_function_impl_clone(call->callee->impl); + + exec_list_append(&state->impl->locals, &callee_copy->locals); + exec_list_append(&state->impl->registers, &callee_copy->registers); + + b->cursor = nir_before_instr(&call->instr); + + /* Add copies of all in parameters */ + assert(call->num_params == callee_copy->num_params); + for (unsigned i = 0; i < callee_copy->num_params; i++) { + /* Only in or inout parameters */ + if (call->callee->params[i].param_type == nir_parameter_out) + continue; + + nir_copy_deref_var(b, nir_deref_var_create(b->shader, + callee_copy->params[i]), + call->params[i]); + } + + /* Pluck the body out of the function and place it here */ + nir_cf_list body; + nir_cf_list_extract(&body, &callee_copy->body); + nir_cf_reinsert(&body, b->cursor); + + b->cursor = nir_before_instr(&call->instr); + + /* Add copies of all out parameters and the return */ + assert(call->num_params == callee_copy->num_params); + for (unsigned i = 0; i < callee_copy->num_params; i++) { + /* Only out or inout parameters */ + if (call->callee->params[i].param_type == nir_parameter_in) + continue; + + nir_copy_deref_var(b, call->params[i], + nir_deref_var_create(b->shader, + callee_copy->params[i])); + } + if (!glsl_type_is_void(call->callee->return_type)) { + nir_copy_deref_var(b, call->return_deref, + nir_deref_var_create(b->shader, + callee_copy->return_var)); + } + + nir_instr_remove(&call->instr); + } + + return true; +} + +bool +nir_inline_functions_impl(nir_function_impl *impl) +{ + struct inline_functions_state state; + + state.progress = false; + state.impl = impl; + nir_builder_init(&state.builder, impl); + + nir_foreach_block(impl, inline_functions_block, &state); + + /* SSA and register indices are completely messed up now */ + nir_index_ssa_defs(impl); + nir_index_local_regs(impl); + + nir_metadata_preserve(impl, nir_metadata_none); + + return state.progress; +} + +bool +nir_inline_functions(nir_shader *shader) +{ + bool progress = false; + + nir_foreach_overload(shader, overload) { + if (overload->impl) + progress = nir_inline_functions_impl(overload->impl) || progress; + } + + return progress; +}