hierarchical_discriminator.h File Reference
#include "config.h"#include "system.h"#include "coretypes.h"#include "gimple.h"#include "tree.h"#include "basic-block.h"#include "input.h"
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Data Structures | |
| struct | copyid_allocator |
Functions | |
| void | assign_discriminators_to_stmt (gimple *stmt, unsigned int multiplicity_factor, unsigned int copyid) |
| void | assign_discriminators_to_bb (basic_block bb, unsigned int multiplicity_factor, unsigned int copyid) |
| void | assign_discriminators_to_loop (class loop *loop, unsigned int multiplicity_factor, unsigned int copyid) |
| unsigned int | allocate_copyid_base (location_t loc, unsigned int stride) |
| void | free_copyid_allocator (struct function *fn) |
Function Documentation
◆ allocate_copyid_base()
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Allocate a unique copy_id base for the given location. STRIDE indicates how many copy_ids to reserve (for unrolling N times, use stride=N). Returns the base copy_id.
References cfun, DISCR_COPYID_MAX, get_pure_location(), init_copyid_allocator(), and UNKNOWN_LOCATION.
Referenced by duplicate_loop_body_to_header_edge(), vect_do_peeling(), vect_loop_versioning(), and vect_transform_loop().
◆ assign_discriminators_to_bb()
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Helper function to assign discriminators to all statements in a basic block. This preserves the base discriminator and updates multiplicity and/or copyid. PHI statements, PHI arguments, and edge locations are also updated.
Assign discriminators to all statements in a basic block. This function updates the multiplicity and/or copyid discriminator components for all statements in the given basic block, while preserving the base discriminator. If multiplicity_factor > 0, multiply existing multiplicity by this factor. If copyid > 0, set it to this value.
References FOR_EACH_EDGE, gimple_location(), gimple_set_location(), gsi_end_p(), gsi_next(), gsi_start_bb(), gsi_start_phis(), gsi_stmt(), is_gimple_debug(), gphi_iterator::phi(), basic_block_def::succs, UNKNOWN_LOCATION, and update_location_discriminator().
Referenced by assign_discriminators_to_loop(), and duplicate_loop_body_to_header_edge().
◆ assign_discriminators_to_loop()
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Helper function to assign discriminators to all basic blocks in a loop. This is used by loop versioning passes to distinguish different versions of the same loop and to indicate vectorization factors.
Assign discriminators to all basic blocks in a loop. This function is used by loop versioning passes to assign version IDs and vectorization factors to all statements in a loop version.
References assign_discriminators_to_bb(), free(), get_loop_body(), i, and loop::num_nodes.
Referenced by vect_do_peeling(), vect_loop_versioning(), and vect_transform_loop().
◆ assign_discriminators_to_stmt()
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Copyright The GNU Toolchain Authors This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>.
Hierarchical discriminator layout (32 bits total):
Discriminator format: [Base:8][Multiplicity:7][CopyID:11][Unused:6]
- Base: bits 0-7 (8 bits, 0-255)
- Multiplicity: bits 8-14 (7 bits, 0-127)
- CopyID: bits 15-25 (11 bits, 0-2047)
- Unused: bits 26-31 (6 bits, reserved)
Base discriminator: Used by front-end and early passes to distinguish
different statements on the same source line.
Multiplicity: Represents when a single IR statement corresponds to
multiple scalar iterations or executions
CopyID: Unique identifier for distinct code copies to distinguish
Helper function to assign discriminators to a statement. This preserves the base discriminator and updates multiplicity and/or copyid.
Assign discriminators to a statement Updates the multiplicity and/or copyid discriminator components for all statements in the given basic block, while preserving the base discriminator. If multiplicity_factor > 0, multiply existing multiplicity by this factor. If copyid > 0, set it to this value.
References gimple_location(), gimple_set_location(), UNKNOWN_LOCATION, and update_location_discriminator().
◆ free_copyid_allocator()
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Free the copy_id allocator for a function.
Free the copy_id allocator for a function. Called when the function is being destroyed.
References function::copyid_alloc, copyid_allocator::location_map, and NULL.
