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Diffstat (limited to 'mesalib/src/util/register_allocate.h')
| -rw-r--r-- | mesalib/src/util/register_allocate.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/mesalib/src/util/register_allocate.h b/mesalib/src/util/register_allocate.h new file mode 100644 index 000000000..dc6874495 --- /dev/null +++ b/mesalib/src/util/register_allocate.h @@ -0,0 +1,79 @@ +/* + * Copyright © 2010 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: + * Eric Anholt <eric@anholt.net> + * + */ + +#include <stdbool.h> + +struct ra_class; +struct ra_regs; + +/* @{ + * Register set setup. + * + * This should be done once at backend initializaion, as + * ra_set_finalize is O(r^2*c^2). The registers may be virtual + * registers, such as aligned register pairs that conflict with the + * two real registers from which they are composed. + */ +struct ra_regs *ra_alloc_reg_set(void *mem_ctx, unsigned int count); +void ra_set_allocate_round_robin(struct ra_regs *regs); +unsigned int ra_alloc_reg_class(struct ra_regs *regs); +void ra_add_reg_conflict(struct ra_regs *regs, + unsigned int r1, unsigned int r2); +void ra_add_transitive_reg_conflict(struct ra_regs *regs, + unsigned int base_reg, unsigned int reg); +void ra_class_add_reg(struct ra_regs *regs, unsigned int c, unsigned int reg); +void ra_set_num_conflicts(struct ra_regs *regs, unsigned int class_a, + unsigned int class_b, unsigned int num_conflicts); +void ra_set_finalize(struct ra_regs *regs, unsigned int **conflicts); +/** @} */ + +/** @{ Interference graph setup. + * + * Each interference graph node is a virtual variable in the IL. It + * is up to the user to ra_set_node_class() for the virtual variable, + * and compute live ranges and ra_node_interfere() between conflicting + * live ranges. Note that an interference *must not* be added between + * two nodes if their classes haven't been assigned yet. The user + * should set the class of each node before building the interference + * graph. + */ +struct ra_graph *ra_alloc_interference_graph(struct ra_regs *regs, + unsigned int count); +void ra_set_node_class(struct ra_graph *g, unsigned int n, unsigned int c); +void ra_add_node_interference(struct ra_graph *g, + unsigned int n1, unsigned int n2); +/** @} */ + +/** @{ Graph-coloring register allocation */ +bool ra_allocate(struct ra_graph *g); + +unsigned int ra_get_node_reg(struct ra_graph *g, unsigned int n); +void ra_set_node_reg(struct ra_graph * g, unsigned int n, unsigned int reg); +void ra_set_node_spill_cost(struct ra_graph *g, unsigned int n, float cost); +int ra_get_best_spill_node(struct ra_graph *g); +/** @} */ + |