1 /**************************************************************************** 2 * * 3 * GNAT COMPILER COMPONENTS * 4 * * 5 * GNAT-SPECIFIC GCC TREE CODES * 6 * * 7 * Specification * 8 * * 9 * Copyright (C) 1992-2008, Free Software Foundation, Inc. * 10 * * 11 * GNAT is free software; you can redistribute it and/or modify it under * 12 * terms of the GNU General Public License as published by the Free Soft- * 13 * ware Foundation; either version 3, or (at your option) any later ver- * 14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- * 15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * 16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * 17 * for more details. You should have received a copy of the GNU General * 18 * Public License along with GCC; see the file COPYING3. If not see * 19 * <http://www.gnu.org/licenses/>. * 20 * * 21 * GNAT was originally developed by the GNAT team at New York University. * 22 * Extensive contributions were provided by Ada Core Technologies Inc. * 23 * * 24 ****************************************************************************/ 25 26 /* A type that is an unconstrained array itself. This node is never passed 27 to GCC. TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE 28 is the type of a record containing the template and data. */ 29 30 DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE, "unconstrained_array_type", tcc_type, 0) 31 32 /* A reference to an unconstrained array. This node only exists as an 33 intermediate node during the translation of a GNAT tree to a GCC tree; 34 it is never passed to GCC. The only field used is operand 0, which 35 is the fat pointer object. */ 36 37 DEFTREECODE (UNCONSTRAINED_ARRAY_REF, "unconstrained_array_ref", 38 tcc_reference, 1) 39 40 /* An expression that returns an RTL suitable for its type. Operand 0 41 is an expression to be evaluated for side effects only. */ 42 DEFTREECODE (NULL_EXPR, "null_expr", tcc_expression, 1) 43 44 /* Same as PLUS_EXPR, except that no modulo reduction is applied. 45 This is used for loops and never shows up in the tree. */ 46 DEFTREECODE (PLUS_NOMOD_EXPR, "plus_nomod_expr", tcc_binary, 2) 47 48 /* Same as MINUS_EXPR, except that no modulo reduction is applied. 49 This is used for loops and never shows up in the tree. */ 50 DEFTREECODE (MINUS_NOMOD_EXPR, "minus_nomod_expr", tcc_binary, 2) 51 52 /* Same as ADDR_EXPR, except that if the operand represents a bit field, 53 return the address of the byte containing the bit. This is used 54 for the 'Address attribute and never shows up in the tree. */ 55 DEFTREECODE (ATTR_ADDR_EXPR, "attr_addr_expr", tcc_reference, 1) 56 57 /* Here are the tree codes for the statement types known to Ada. These 58 must be at the end of this file to allow IS_ADA_STMT to work. */ 59 60 /* This is how record_code_position and insert_code_for work. The former 61 makes this tree node, whose operand is a statement. The latter inserts 62 the actual statements into this node. Gimplification consists of 63 just returning the inner statement. */ 64 DEFTREECODE (STMT_STMT, "stmt_stmt", tcc_statement, 1) 65 66 /* A loop. LOOP_STMT_TOP_COND and LOOP_STMT_BOT_COND are the tests to exit a 67 loop at the top and bottom, respectively. LOOP_STMT_UPDATE is the statement 68 to update the loop iterator at the continue point. LOOP_STMT_BODY are the 69 statements in the body of the loop. LOOP_STMT_LABEL points to the LABEL_DECL 70 of the end label of the loop. */ 71 DEFTREECODE (LOOP_STMT, "loop_stmt", tcc_statement, 5) 72 73 /* Conditionally exit a loop. EXIT_STMT_COND is the condition, which, if 74 true, will cause the loop to be exited. If no condition is specified, 75 the loop is unconditionally exited. EXIT_STMT_LABEL is the end label 76 corresponding to the loop to exit. */ 77 DEFTREECODE (EXIT_STMT, "exit_stmt", tcc_statement, 2) 78 79 /* A exception region. REGION_STMT_BODY is the statement to be executed 80 inside the region. REGION_STMT_HANDLE is a statement that represents 81 the exception handlers (usually a BLOCK_STMT of HANDLE_STMTs). 82 REGION_STMT_BLOCK is the BLOCK node for the declarative region, if any. */ 83 DEFTREECODE (REGION_STMT, "region_stmt", tcc_statement, 3) 84 85 /* An exception handler. HANDLER_STMT_ARG is the value to pass to 86 expand_start_catch, HANDLER_STMT_LIST is the list of statements for the 87 handler itself, and HANDLER_STMT_BLOCK is the BLOCK node for this 88 binding. */ 89 DEFTREECODE (HANDLER_STMT, "handler_stmt", tcc_statement, 3) 90
