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author | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
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committer | marha <marha@users.sourceforge.net> | 2015-02-22 21:39:56 +0100 |
commit | 462f18c7b25fe3e467f837647d07ab0a78aa8d2b (patch) | |
tree | fc8013c0a1bac05a1945846c1697e973f4c35013 /mesalib/src/glsl/nir/nir_opt_global_to_local.c | |
parent | 36f711ee12b6dd5184198abed3aa551efb585587 (diff) | |
download | vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.gz vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.tar.bz2 vcxsrv-462f18c7b25fe3e467f837647d07ab0a78aa8d2b.zip |
Merged origin/release (checked in because wanted to merge new stuff)
Diffstat (limited to 'mesalib/src/glsl/nir/nir_opt_global_to_local.c')
-rw-r--r-- | mesalib/src/glsl/nir/nir_opt_global_to_local.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/mesalib/src/glsl/nir/nir_opt_global_to_local.c b/mesalib/src/glsl/nir/nir_opt_global_to_local.c new file mode 100644 index 000000000..00db37ba7 --- /dev/null +++ b/mesalib/src/glsl/nir/nir_opt_global_to_local.c @@ -0,0 +1,103 @@ +/* + * Copyright © 2014 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. + * + * Authors: + * Connor Abbott (cwabbott0@gmail.com) + * + */ + +#include "nir.h" + +static bool +global_to_local(nir_register *reg) +{ + nir_function_impl *impl = NULL; + + assert(reg->is_global); + + struct set_entry *entry; + set_foreach(reg->defs, entry) { + nir_instr *instr = (nir_instr *) entry->key; + nir_function_impl *instr_impl = + nir_cf_node_get_function(&instr->block->cf_node); + if (impl != NULL) { + if (impl != instr_impl) + return false; + } else { + impl = instr_impl; + } + } + + set_foreach(reg->uses, entry) { + nir_instr *instr = (nir_instr *) entry->key; + nir_function_impl *instr_impl = + nir_cf_node_get_function(&instr->block->cf_node); + if (impl != NULL) { + if (impl != instr_impl) + return false; + } else { + impl = instr_impl; + } + } + + set_foreach(reg->if_uses, entry) { + nir_if *if_stmt = (nir_if *) entry->key; + nir_function_impl *if_impl = nir_cf_node_get_function(&if_stmt->cf_node); + if (impl != NULL) { + if (impl != if_impl) + return false; + } else { + impl = if_impl; + } + } + + if (impl == NULL) { + /* this instruction is never used/defined, delete it */ + nir_reg_remove(reg); + return true; + } + + /* + * if we've gotten to this point, the register is always used/defined in + * the same implementation so we can move it to be local to that + * implementation. + */ + + exec_node_remove(®->node); + exec_list_push_tail(&impl->registers, ®->node); + reg->index = impl->reg_alloc++; + reg->is_global = false; + return true; +} + +bool +nir_opt_global_to_local(nir_shader *shader) +{ + bool progress = false; + + foreach_list_typed_safe(nir_register, reg, node, &shader->registers) { + if (global_to_local(reg)) + progress = true; + } + + return progress; +} |