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author | marha <marha@users.sourceforge.net> | 2015-02-22 14:31:16 +0100 |
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committer | marha <marha@users.sourceforge.net> | 2015-02-22 14:31:16 +0100 |
commit | f1c2db43dcf35d2cf4715390bd2391c28e42a8c2 (patch) | |
tree | 46b537271afe0f6534231b1bd4cc4f91ae1fb446 /mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c | |
parent | 5e5a48ff8cd08f123601cd0625ca62a86675aac9 (diff) | |
download | vcxsrv-f1c2db43dcf35d2cf4715390bd2391c28e42a8c2.tar.gz vcxsrv-f1c2db43dcf35d2cf4715390bd2391c28e42a8c2.tar.bz2 vcxsrv-f1c2db43dcf35d2cf4715390bd2391c28e42a8c2.zip |
xwininfo fontconfig libX11 libXdmcp libfontenc libxcb libxcb/xcb-proto mesalib xserver xkeyboard-config mkfontscale git update 22 Feb 2015
xserver commit 3a06faf3fcdb7451125a46181f9152e8e59e9770
libxcb commit e3ec1f74637237ce500dfd0ca59f2e422da4e019
libxcb/xcb-proto commit 4c550465934164aab2449a125f75f4ca07816233
xkeyboard-config commit 26f344c93f8c6141e9233eb68088ba4fd56bc9ef
libX11 commit c8e19b393defd53f046ddc2da3a16881221b3c34
libXdmcp commit 9f4cac7656b221ce2a8f97e7bd31e5e23126d001
libfontenc commit de1843aaf76015c9d99416f3122d169fe331b849
mkfontscale commit 87d628f8eec170ec13bb9feefb1ce05aed07d1d6
xwininfo commit 0c49f8f2bd56b1e77721e81030ea948386dcdf4e
fontconfig commit d6d5adeb7940c0d0beb86489c2a1c2ce59e5c044
mesa commit 4359954d842caa2a9f8d4b50d70ecc789884b68b
Diffstat (limited to 'mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c')
-rw-r--r-- | mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c b/mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c new file mode 100644 index 000000000..0cd8740cc --- /dev/null +++ b/mesalib/src/glsl/nir/nir_lower_global_vars_to_local.c @@ -0,0 +1,106 @@ +/* + * 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: + * Jason Ekstrand (jason@jlekstrand.net) + * + */ + +/* + * This lowering pass detects when a global variable is only being used by + * one function and makes it local to that function + */ + +#include "nir.h" + +struct global_to_local_state { + nir_function_impl *impl; + /* A hash table keyed on variable pointers that stores the unique + * nir_function_impl that uses the given variable. If a variable is + * used in multiple functions, the data for the given key will be NULL. + */ + struct hash_table *var_func_table; +}; + +static bool +mark_global_var_uses_block(nir_block *block, void *void_state) +{ + struct global_to_local_state *state = void_state; + + nir_foreach_instr(block, instr) { + if (instr->type != nir_instr_type_intrinsic) + continue; + + nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); + unsigned num_vars = nir_intrinsic_infos[intrin->intrinsic].num_variables; + + for (unsigned i = 0; i < num_vars; i++) { + nir_variable *var = intrin->variables[i]->var; + if (var->data.mode != nir_var_global) + continue; + + struct hash_entry *entry = + _mesa_hash_table_search(state->var_func_table, var); + + if (entry) { + if (entry->data != state->impl) + entry->data = NULL; + } else { + _mesa_hash_table_insert(state->var_func_table, var, state->impl); + } + } + } + + return true; +} + +void +nir_lower_global_vars_to_local(nir_shader *shader) +{ + struct global_to_local_state state; + + state.var_func_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer, + _mesa_key_pointer_equal); + + nir_foreach_overload(shader, overload) { + if (overload->impl) { + state.impl = overload->impl; + nir_foreach_block(overload->impl, mark_global_var_uses_block, &state); + } + } + + struct hash_entry *entry; + hash_table_foreach(state.var_func_table, entry) { + nir_variable *var = (void *)entry->key; + nir_function_impl *impl = entry->data; + + assert(var->data.mode == nir_var_global); + + if (impl != NULL) { + exec_node_remove(&var->node); + var->data.mode = nir_var_local; + exec_list_push_tail(&impl->locals, &var->node); + } + } + + _mesa_hash_table_destroy(state.var_func_table, NULL); +} |