4af29981ab
In the case where 8 out of every 16 elements are widened using a widening pattern and the next 8 are skipped, the patterns are not recognized. This is because they are normally used in a pair, such as VEC_WIDEN_MINUS_HI/LO, to achieve a v16qi->v16hi conversion for example. This patch adds support for V8QI->V8HI patterns. gcc/ChangeLog: PR tree-optimization/98772 * optabs-tree.c (supportable_half_widening_operation): New function to check for supportable V8QI->V8HI widening patterns. * optabs-tree.h (supportable_half_widening_operation): New function. * tree-vect-stmts.c (vect_create_half_widening_stmts): New function to create promotion stmts for V8QI->V8HI widening patterns. (vectorizable_conversion): Add case for V8QI->V8HI. gcc/testsuite/ChangeLog: PR tree-optimization/98772 * gcc.target/aarch64/pr98772.c: New test.
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/* Tree-based target query functions relating to optabs
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Copyright (C) 2001-2021 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_OPTABS_TREE_H
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#define GCC_OPTABS_TREE_H
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#include "optabs-query.h"
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/* An extra flag to control optab_for_tree_code's behavior. This is needed to
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distinguish between machines with a vector shift that takes a scalar for the
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shift amount vs. machines that take a vector for the shift amount. */
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enum optab_subtype
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{
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optab_default,
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optab_scalar,
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optab_vector
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};
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/* Return the optab used for computing the given operation on the type given by
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the second argument. The third argument distinguishes between the types of
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vector shifts and rotates. */
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optab optab_for_tree_code (enum tree_code, const_tree, enum optab_subtype);
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bool
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supportable_half_widening_operation (enum tree_code, tree, tree,
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enum tree_code *);
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bool supportable_convert_operation (enum tree_code, tree, tree,
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enum tree_code *);
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bool expand_vec_cmp_expr_p (tree, tree, enum tree_code);
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bool expand_vec_cond_expr_p (tree, tree, enum tree_code);
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void init_tree_optimization_optabs (tree);
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bool target_supports_op_p (tree, enum tree_code,
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enum optab_subtype = optab_default);
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#endif
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