| 1 | /**************************************************************************** |
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| 2 | * * |
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| 3 | * GNAT COMPILER COMPONENTS * |
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| 4 | * * |
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| 5 | * GNAT-SPECIFIC GCC TREE CODES * |
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| 6 | * * |
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| 7 | * Specification * |
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| 8 | * * |
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| 9 | * Copyright (C) 1992-2023, Free Software Foundation, Inc. * |
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| 10 | * * |
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| 11 | * GNAT is free software; you can redistribute it and/or modify it under * |
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| 12 | * terms of the GNU General Public License as published by the Free Soft- * |
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| 13 | * ware Foundation; either version 3, or (at your option) any later ver- * |
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| 14 | * sion. GNAT is distributed in the hope that it will be useful, but WITH- * |
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| 15 | * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * |
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| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * |
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| 17 | * for more details. You should have received a copy of the GNU General * |
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| 18 | * Public License along with GCC; see the file COPYING3. If not see * |
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| 19 | * <http://www.gnu.org/licenses/>. * |
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| 20 | * * |
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| 21 | * GNAT was originally developed by the GNAT team at New York University. * |
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| 22 | * Extensive contributions were provided by Ada Core Technologies Inc. * |
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| 23 | * * |
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| 24 | ****************************************************************************/ |
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| 25 | |
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| 26 | /* A type that is an unconstrained array. This node is never passed to GCC. |
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| 27 | TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE is |
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| 28 | the type of a record containing the template and data. */ |
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| 29 | DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE, "unconstrained_array_type" , tcc_type, 0) |
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| 30 | |
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| 31 | /* A reference to an unconstrained array. This node only exists as an |
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| 32 | intermediate node during the translation of a GNAT tree to a GCC tree; |
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| 33 | it is never passed to GCC. The only field used is operand 0, which |
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| 34 | is the fat pointer object. */ |
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| 35 | DEFTREECODE (UNCONSTRAINED_ARRAY_REF, "unconstrained_array_ref" , |
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| 36 | tcc_reference, 1) |
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| 37 | |
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| 38 | /* Same as SAVE_EXPR, but operand 1 contains the statement used to initialize |
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| 39 | the temporary instead of using the value of operand 0 directly. */ |
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| 40 | DEFTREECODE (LOAD_EXPR, "load_expr" , tcc_expression, 2) |
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| 41 | |
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| 42 | /* An expression that returns an RTL suitable for its type. Operand 0 |
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| 43 | is an expression to be evaluated for side effects only. */ |
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| 44 | DEFTREECODE (NULL_EXPR, "null_expr" , tcc_expression, 1) |
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| 45 | |
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| 46 | /* Same as PLUS_EXPR, except that no modulo reduction is applied. |
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| 47 | This is used for loops and never shows up in the tree. */ |
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| 48 | DEFTREECODE (PLUS_NOMOD_EXPR, "plus_nomod_expr" , tcc_binary, 2) |
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| 49 | |
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| 50 | /* Same as MINUS_EXPR, except that no modulo reduction is applied. |
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| 51 | This is used for loops and never shows up in the tree. */ |
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| 52 | DEFTREECODE (MINUS_NOMOD_EXPR, "minus_nomod_expr" , tcc_binary, 2) |
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| 53 | |
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| 54 | /* An expression that computes an exponentiation. Operand 0 is the base and |
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| 55 | Operand 1 is the exponent. This node is never passed to GCC: it is only |
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| 56 | used internally to describe fixed point types scale factors. */ |
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| 57 | DEFTREECODE (POWER_EXPR, "power_expr" , tcc_binary, 2) |
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| 58 | |
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| 59 | /* Same as ADDR_EXPR, except that if the operand represents a bit field, |
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| 60 | return the address of the byte containing the bit. This is used |
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| 61 | for the Address attribute and never shows up in the tree. */ |
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| 62 | DEFTREECODE (ATTR_ADDR_EXPR, "attr_addr_expr" , tcc_reference, 1) |
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| 63 | |
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| 64 | /* Here are the tree codes for the statement types known to Ada. These |
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| 65 | must be at the end of this file to allow IS_ADA_STMT to work. */ |
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| 66 | |
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| 67 | /* This is how record_code_position and insert_code_for work. The former |
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| 68 | makes this tree node, whose operand is a statement. The latter inserts |
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| 69 | the actual statements into this node. Gimplification consists of |
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| 70 | just returning the inner statement. */ |
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| 71 | DEFTREECODE (STMT_STMT, "stmt_stmt" , tcc_statement, 1) |
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| 72 | |
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| 73 | /* A loop. LOOP_STMT_COND is the test to exit the loop. LOOP_STMT_UPDATE |
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| 74 | is the statement to update the loop iteration variable at the continue |
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| 75 | point. LOOP_STMT_BODY are the statements in the body of the loop. And |
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| 76 | LOOP_STMT_LABEL points to the LABEL_DECL of the end label of the loop. */ |
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| 77 | DEFTREECODE (LOOP_STMT, "loop_stmt" , tcc_statement, 4) |
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| 78 | |
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| 79 | /* Conditionally exit a loop. EXIT_STMT_COND is the condition, which, if |
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| 80 | true, will cause the loop to be exited. If no condition is specified, |
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| 81 | the loop is unconditionally exited. EXIT_STMT_LABEL is the end label |
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| 82 | corresponding to the loop to exit. */ |
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| 83 | DEFTREECODE (EXIT_STMT, "exit_stmt" , tcc_statement, 2) |
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| 84 | |
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