83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
/*
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* Copyright © 2018 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef NIR_DEREF_H
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#define NIR_DEREF_H
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#include "nir.h"
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#include "nir_builder.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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/** Short path so we can keep it on the stack most of the time. */
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nir_deref_instr *_short_path[7];
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/** A null-terminated array view of a deref chain
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*
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* The first element of this array will be the variable dereference
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* followed by every deref_instr on the path to the final one. The last
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* element in the array is a NULL pointer which acts as a terminator.
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*/
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nir_deref_instr **path;
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} nir_deref_path;
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typedef struct {
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nir_deref_instr *instr;
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nir_deref_path *_path;
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} nir_deref_and_path;
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void nir_deref_path_init(nir_deref_path *path,
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nir_deref_instr *deref, void *mem_ctx);
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void nir_deref_path_finish(nir_deref_path *path);
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unsigned nir_deref_instr_get_const_offset(nir_deref_instr *deref,
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glsl_type_size_align_func size_align);
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nir_ssa_def *nir_build_deref_offset(nir_builder *b, nir_deref_instr *deref,
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glsl_type_size_align_func size_align);
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nir_deref_path *nir_get_deref_path(void *mem_ctx, nir_deref_and_path *deref);
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typedef enum {
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nir_derefs_do_not_alias = 0,
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nir_derefs_equal_bit = (1 << 0),
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nir_derefs_may_alias_bit = (1 << 1),
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nir_derefs_a_contains_b_bit = (1 << 2),
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nir_derefs_b_contains_a_bit = (1 << 3),
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} nir_deref_compare_result;
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nir_deref_compare_result nir_compare_deref_paths(nir_deref_path *a_path, nir_deref_path *b_path);
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nir_deref_compare_result nir_compare_derefs(nir_deref_instr *a, nir_deref_instr *b);
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nir_deref_compare_result nir_compare_derefs_and_paths(void *mem_ctx,
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nir_deref_and_path *a,
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nir_deref_and_path *b);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* NIR_DEREF_H */
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