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Diffstat (limited to 'gcc-4.8.3/gcc/c-family/c-pretty-print.c')
| -rw-r--r-- | gcc-4.8.3/gcc/c-family/c-pretty-print.c | 2397 |
1 files changed, 2397 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/c-family/c-pretty-print.c b/gcc-4.8.3/gcc/c-family/c-pretty-print.c new file mode 100644 index 000000000..13dd613d8 --- /dev/null +++ b/gcc-4.8.3/gcc/c-family/c-pretty-print.c @@ -0,0 +1,2397 @@ +/* Subroutines common to both C and C++ pretty-printers. + Copyright (C) 2002-2013 Free Software Foundation, Inc. + Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net> + +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/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "tree.h" +#include "intl.h" +#include "c-pretty-print.h" +#include "tree-pretty-print.h" +#include "tree-iterator.h" +#include "diagnostic.h" + +/* Translate if being used for diagnostics, but not for dump files or + __PRETTY_FUNCTION. */ +#define M_(msgid) (pp_translate_identifiers (pp) ? _(msgid) : (msgid)) + +/* The pretty-printer code is primarily designed to closely follow + (GNU) C and C++ grammars. That is to be contrasted with spaghetti + codes we used to have in the past. Following a structured + approach (preferably the official grammars) is believed to make it + much easier to add extensions and nifty pretty-printing effects that + takes expression or declaration contexts into account. */ + + +#define pp_c_maybe_whitespace(PP) \ + do { \ + if (pp_base (PP)->padding == pp_before) \ + pp_c_whitespace (PP); \ + } while (0) + +/* literal */ +static void pp_c_char (c_pretty_printer *, int); + +/* postfix-expression */ +static void pp_c_initializer_list (c_pretty_printer *, tree); +static void pp_c_brace_enclosed_initializer_list (c_pretty_printer *, tree); + +static void pp_c_multiplicative_expression (c_pretty_printer *, tree); +static void pp_c_additive_expression (c_pretty_printer *, tree); +static void pp_c_shift_expression (c_pretty_printer *, tree); +static void pp_c_relational_expression (c_pretty_printer *, tree); +static void pp_c_equality_expression (c_pretty_printer *, tree); +static void pp_c_and_expression (c_pretty_printer *, tree); +static void pp_c_exclusive_or_expression (c_pretty_printer *, tree); +static void pp_c_inclusive_or_expression (c_pretty_printer *, tree); +static void pp_c_logical_and_expression (c_pretty_printer *, tree); +static void pp_c_conditional_expression (c_pretty_printer *, tree); +static void pp_c_assignment_expression (c_pretty_printer *, tree); + +/* declarations. */ + + +/* Helper functions. */ + +void +pp_c_whitespace (c_pretty_printer *pp) +{ + pp_space (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_left_paren (c_pretty_printer *pp) +{ + pp_left_paren (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_right_paren (c_pretty_printer *pp) +{ + pp_right_paren (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_left_brace (c_pretty_printer *pp) +{ + pp_left_brace (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_right_brace (c_pretty_printer *pp) +{ + pp_right_brace (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_left_bracket (c_pretty_printer *pp) +{ + pp_left_bracket (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_right_bracket (c_pretty_printer *pp) +{ + pp_right_bracket (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_dot (c_pretty_printer *pp) +{ + pp_dot (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_ampersand (c_pretty_printer *pp) +{ + pp_ampersand (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_star (c_pretty_printer *pp) +{ + pp_star (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_arrow (c_pretty_printer *pp) +{ + pp_arrow (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_semicolon (c_pretty_printer *pp) +{ + pp_semicolon (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_complement (c_pretty_printer *pp) +{ + pp_complement (pp); + pp_base (pp)->padding = pp_none; +} + +void +pp_c_exclamation (c_pretty_printer *pp) +{ + pp_exclamation (pp); + pp_base (pp)->padding = pp_none; +} + +/* Print out the external representation of QUALIFIERS. */ + +void +pp_c_cv_qualifiers (c_pretty_printer *pp, int qualifiers, bool func_type) +{ + const char *p = pp_last_position_in_text (pp); + bool previous = false; + + if (!qualifiers) + return; + + /* The C programming language does not have references, but it is much + simpler to handle those here rather than going through the same + logic in the C++ pretty-printer. */ + if (p != NULL && (*p == '*' || *p == '&')) + pp_c_whitespace (pp); + + if (qualifiers & TYPE_QUAL_CONST) + { + pp_c_ws_string (pp, func_type ? "__attribute__((const))" : "const"); + previous = true; + } + + if (qualifiers & TYPE_QUAL_VOLATILE) + { + if (previous) + pp_c_whitespace (pp); + pp_c_ws_string (pp, func_type ? "__attribute__((noreturn))" : "volatile"); + previous = true; + } + + if (qualifiers & TYPE_QUAL_RESTRICT) + { + if (previous) + pp_c_whitespace (pp); + pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx () + ? "restrict" : "__restrict__")); + } +} + +/* Pretty-print T using the type-cast notation '( type-name )'. */ + +static void +pp_c_type_cast (c_pretty_printer *pp, tree t) +{ + pp_c_left_paren (pp); + pp_type_id (pp, t); + pp_c_right_paren (pp); +} + +/* We're about to pretty-print a pointer type as indicated by T. + Output a whitespace, if needed, preparing for subsequent output. */ + +void +pp_c_space_for_pointer_operator (c_pretty_printer *pp, tree t) +{ + if (POINTER_TYPE_P (t)) + { + tree pointee = strip_pointer_operator (TREE_TYPE (t)); + if (TREE_CODE (pointee) != ARRAY_TYPE + && TREE_CODE (pointee) != FUNCTION_TYPE) + pp_c_whitespace (pp); + } +} + + +/* Declarations. */ + +/* C++ cv-qualifiers are called type-qualifiers in C. Print out the + cv-qualifiers of T. If T is a declaration then it is the cv-qualifier + of its type. Take care of possible extensions. + + type-qualifier-list: + type-qualifier + type-qualifier-list type-qualifier + + type-qualifier: + const + restrict -- C99 + __restrict__ -- GNU C + address-space-qualifier -- GNU C + volatile + + address-space-qualifier: + identifier -- GNU C */ + +void +pp_c_type_qualifier_list (c_pretty_printer *pp, tree t) +{ + int qualifiers; + + if (!t || t == error_mark_node) + return; + + if (!TYPE_P (t)) + t = TREE_TYPE (t); + + qualifiers = TYPE_QUALS (t); + pp_c_cv_qualifiers (pp, qualifiers, + TREE_CODE (t) == FUNCTION_TYPE); + + if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (t))) + { + const char *as = c_addr_space_name (TYPE_ADDR_SPACE (t)); + pp_c_identifier (pp, as); + } +} + +/* pointer: + * type-qualifier-list(opt) + * type-qualifier-list(opt) pointer */ + +static void +pp_c_pointer (c_pretty_printer *pp, tree t) +{ + if (!TYPE_P (t) && TREE_CODE (t) != TYPE_DECL) + t = TREE_TYPE (t); + switch (TREE_CODE (t)) + { + case POINTER_TYPE: + /* It is easier to handle C++ reference types here. */ + case REFERENCE_TYPE: + if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE) + pp_c_pointer (pp, TREE_TYPE (t)); + if (TREE_CODE (t) == POINTER_TYPE) + pp_c_star (pp); + else + pp_c_ampersand (pp); + pp_c_type_qualifier_list (pp, t); + break; + + /* ??? This node is now in GENERIC and so shouldn't be here. But + we'll fix that later. */ + case DECL_EXPR: + pp_declaration (pp, DECL_EXPR_DECL (t)); + pp_needs_newline (pp) = true; + break; + + default: + pp_unsupported_tree (pp, t); + } +} + +/* type-specifier: + void + char + short + int + long + float + double + signed + unsigned + _Bool -- C99 + _Complex -- C99 + _Imaginary -- C99 + struct-or-union-specifier + enum-specifier + typedef-name. + + GNU extensions. + simple-type-specifier: + __complex__ + __vector__ */ + +void +pp_c_type_specifier (c_pretty_printer *pp, tree t) +{ + const enum tree_code code = TREE_CODE (t); + switch (code) + { + case ERROR_MARK: + pp_c_ws_string (pp, M_("<type-error>")); + break; + + case IDENTIFIER_NODE: + pp_c_identifier (pp, IDENTIFIER_POINTER (t)); + break; + + case VOID_TYPE: + case BOOLEAN_TYPE: + case INTEGER_TYPE: + case REAL_TYPE: + case FIXED_POINT_TYPE: + if (TYPE_NAME (t)) + { + t = TYPE_NAME (t); + pp_c_type_specifier (pp, t); + } + else + { + int prec = TYPE_PRECISION (t); + if (ALL_FIXED_POINT_MODE_P (TYPE_MODE (t))) + t = c_common_type_for_mode (TYPE_MODE (t), TYPE_SATURATING (t)); + else + t = c_common_type_for_mode (TYPE_MODE (t), TYPE_UNSIGNED (t)); + if (TYPE_NAME (t)) + { + pp_c_type_specifier (pp, t); + if (TYPE_PRECISION (t) != prec) + { + pp_string (pp, ":"); + pp_decimal_int (pp, prec); + } + } + else + { + switch (code) + { + case INTEGER_TYPE: + pp_string (pp, (TYPE_UNSIGNED (t) + ? M_("<unnamed-unsigned:") + : M_("<unnamed-signed:"))); + break; + case REAL_TYPE: + pp_string (pp, M_("<unnamed-float:")); + break; + case FIXED_POINT_TYPE: + pp_string (pp, M_("<unnamed-fixed:")); + break; + default: + gcc_unreachable (); + } + pp_decimal_int (pp, prec); + pp_string (pp, ">"); + } + } + break; + + case TYPE_DECL: + if (DECL_NAME (t)) + pp_id_expression (pp, t); + else + pp_c_ws_string (pp, M_("<typedef-error>")); + break; + + case UNION_TYPE: + case RECORD_TYPE: + case ENUMERAL_TYPE: + if (code == UNION_TYPE) + pp_c_ws_string (pp, "union"); + else if (code == RECORD_TYPE) + pp_c_ws_string (pp, "struct"); + else if (code == ENUMERAL_TYPE) + pp_c_ws_string (pp, "enum"); + else + pp_c_ws_string (pp, M_("<tag-error>")); + + if (TYPE_NAME (t)) + pp_id_expression (pp, TYPE_NAME (t)); + else + pp_c_ws_string (pp, M_("<anonymous>")); + break; + + default: + pp_unsupported_tree (pp, t); + break; + } +} + +/* specifier-qualifier-list: + type-specifier specifier-qualifier-list-opt + type-qualifier specifier-qualifier-list-opt + + + Implementation note: Because of the non-linearities in array or + function declarations, this routine prints not just the + specifier-qualifier-list of such entities or types of such entities, + but also the 'pointer' production part of their declarators. The + remaining part is done by pp_declarator or pp_c_abstract_declarator. */ + +void +pp_c_specifier_qualifier_list (c_pretty_printer *pp, tree t) +{ + const enum tree_code code = TREE_CODE (t); + + if (!(pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE) + pp_c_type_qualifier_list (pp, t); + switch (code) + { + case REFERENCE_TYPE: + case POINTER_TYPE: + { + /* Get the types-specifier of this type. */ + tree pointee = strip_pointer_operator (TREE_TYPE (t)); + pp_c_specifier_qualifier_list (pp, pointee); + if (TREE_CODE (pointee) == ARRAY_TYPE + || TREE_CODE (pointee) == FUNCTION_TYPE) + { + pp_c_whitespace (pp); + pp_c_left_paren (pp); + pp_c_attributes_display (pp, TYPE_ATTRIBUTES (pointee)); + } + else if (!c_dialect_cxx ()) + pp_c_whitespace (pp); + pp_ptr_operator (pp, t); + } + break; + + case FUNCTION_TYPE: + case ARRAY_TYPE: + pp_c_specifier_qualifier_list (pp, TREE_TYPE (t)); + break; + + case VECTOR_TYPE: + case COMPLEX_TYPE: + if (code == COMPLEX_TYPE) + pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx () + ? "_Complex" : "__complex__")); + else if (code == VECTOR_TYPE) + { + pp_c_ws_string (pp, "__vector"); + pp_c_left_paren (pp); + pp_wide_integer (pp, TYPE_VECTOR_SUBPARTS (t)); + pp_c_right_paren (pp); + pp_c_whitespace (pp); + } + pp_c_specifier_qualifier_list (pp, TREE_TYPE (t)); + break; + + default: + pp_simple_type_specifier (pp, t); + break; + } + if ((pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE) + pp_c_type_qualifier_list (pp, t); +} + +/* parameter-type-list: + parameter-list + parameter-list , ... + + parameter-list: + parameter-declaration + parameter-list , parameter-declaration + + parameter-declaration: + declaration-specifiers declarator + declaration-specifiers abstract-declarator(opt) */ + +void +pp_c_parameter_type_list (c_pretty_printer *pp, tree t) +{ + bool want_parm_decl = DECL_P (t) && !(pp->flags & pp_c_flag_abstract); + tree parms = want_parm_decl ? DECL_ARGUMENTS (t) : TYPE_ARG_TYPES (t); + pp_c_left_paren (pp); + if (parms == void_list_node) + pp_c_ws_string (pp, "void"); + else + { + bool first = true; + for ( ; parms && parms != void_list_node; parms = TREE_CHAIN (parms)) + { + if (!first) + pp_separate_with (pp, ','); + first = false; + pp_declaration_specifiers + (pp, want_parm_decl ? parms : TREE_VALUE (parms)); + if (want_parm_decl) + pp_declarator (pp, parms); + else + pp_abstract_declarator (pp, TREE_VALUE (parms)); + } + } + pp_c_right_paren (pp); +} + +/* abstract-declarator: + pointer + pointer(opt) direct-abstract-declarator */ + +static void +pp_c_abstract_declarator (c_pretty_printer *pp, tree t) +{ + if (TREE_CODE (t) == POINTER_TYPE) + { + if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE) + pp_c_right_paren (pp); + t = TREE_TYPE (t); + } + + pp_direct_abstract_declarator (pp, t); +} + +/* direct-abstract-declarator: + ( abstract-declarator ) + direct-abstract-declarator(opt) [ assignment-expression(opt) ] + direct-abstract-declarator(opt) [ * ] + direct-abstract-declarator(opt) ( parameter-type-list(opt) ) */ + +void +pp_c_direct_abstract_declarator (c_pretty_printer *pp, tree t) +{ + switch (TREE_CODE (t)) + { + case POINTER_TYPE: + pp_abstract_declarator (pp, t); + break; + + case FUNCTION_TYPE: + pp_c_parameter_type_list (pp, t); + pp_direct_abstract_declarator (pp, TREE_TYPE (t)); + break; + + case ARRAY_TYPE: + pp_c_left_bracket (pp); + if (TYPE_DOMAIN (t) && TYPE_MAX_VALUE (TYPE_DOMAIN (t))) + { + tree maxval = TYPE_MAX_VALUE (TYPE_DOMAIN (t)); + tree type = TREE_TYPE (maxval); + + if (host_integerp (maxval, 0)) + pp_wide_integer (pp, tree_low_cst (maxval, 0) + 1); + else + pp_expression (pp, fold_build2 (PLUS_EXPR, type, maxval, + build_int_cst (type, 1))); + } + pp_c_right_bracket (pp); + pp_direct_abstract_declarator (pp, TREE_TYPE (t)); + break; + + case IDENTIFIER_NODE: + case VOID_TYPE: + case BOOLEAN_TYPE: + case INTEGER_TYPE: + case REAL_TYPE: + case FIXED_POINT_TYPE: + case ENUMERAL_TYPE: + case RECORD_TYPE: + case UNION_TYPE: + case VECTOR_TYPE: + case COMPLEX_TYPE: + case TYPE_DECL: + break; + + default: + pp_unsupported_tree (pp, t); + break; + } +} + +/* type-name: + specifier-qualifier-list abstract-declarator(opt) */ + +void +pp_c_type_id (c_pretty_printer *pp, tree t) +{ + pp_c_specifier_qualifier_list (pp, t); + pp_abstract_declarator (pp, t); +} + +/* storage-class-specifier: + typedef + extern + static + auto + register */ + +void +pp_c_storage_class_specifier (c_pretty_printer *pp, tree t) +{ + if (TREE_CODE (t) == TYPE_DECL) + pp_c_ws_string (pp, "typedef"); + else if (DECL_P (t)) + { + if (DECL_REGISTER (t)) + pp_c_ws_string (pp, "register"); + else if (TREE_STATIC (t) && TREE_CODE (t) == VAR_DECL) + pp_c_ws_string (pp, "static"); + } +} + +/* function-specifier: + inline */ + +void +pp_c_function_specifier (c_pretty_printer *pp, tree t) +{ + if (TREE_CODE (t) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (t)) + pp_c_ws_string (pp, "inline"); +} + +/* declaration-specifiers: + storage-class-specifier declaration-specifiers(opt) + type-specifier declaration-specifiers(opt) + type-qualifier declaration-specifiers(opt) + function-specifier declaration-specifiers(opt) */ + +void +pp_c_declaration_specifiers (c_pretty_printer *pp, tree t) +{ + pp_storage_class_specifier (pp, t); + pp_function_specifier (pp, t); + pp_c_specifier_qualifier_list (pp, DECL_P (t) ? TREE_TYPE (t) : t); +} + +/* direct-declarator + identifier + ( declarator ) + direct-declarator [ type-qualifier-list(opt) assignment-expression(opt) ] + direct-declarator [ static type-qualifier-list(opt) assignment-expression(opt)] + direct-declarator [ type-qualifier-list static assignment-expression ] + direct-declarator [ type-qualifier-list * ] + direct-declarator ( parameter-type-list ) + direct-declarator ( identifier-list(opt) ) */ + +void +pp_c_direct_declarator (c_pretty_printer *pp, tree t) +{ + switch (TREE_CODE (t)) + { + case VAR_DECL: + case PARM_DECL: + case TYPE_DECL: + case FIELD_DECL: + case LABEL_DECL: + pp_c_space_for_pointer_operator (pp, TREE_TYPE (t)); + pp_c_tree_decl_identifier (pp, t); + break; + + case ARRAY_TYPE: + case POINTER_TYPE: + pp_abstract_declarator (pp, TREE_TYPE (t)); + break; + + case FUNCTION_TYPE: + pp_parameter_list (pp, t); + pp_abstract_declarator (pp, TREE_TYPE (t)); + break; + + case FUNCTION_DECL: + pp_c_space_for_pointer_operator (pp, TREE_TYPE (TREE_TYPE (t))); + pp_c_tree_decl_identifier (pp, t); + if (pp_c_base (pp)->flags & pp_c_flag_abstract) + pp_abstract_declarator (pp, TREE_TYPE (t)); + else + { + pp_parameter_list (pp, t); + pp_abstract_declarator (pp, TREE_TYPE (TREE_TYPE (t))); + } + break; + + case INTEGER_TYPE: + case REAL_TYPE: + case FIXED_POINT_TYPE: + case ENUMERAL_TYPE: + case UNION_TYPE: + case RECORD_TYPE: + break; + + default: + pp_unsupported_tree (pp, t); + break; + } +} + + +/* declarator: + pointer(opt) direct-declarator */ + +void +pp_c_declarator (c_pretty_printer *pp, tree t) +{ + switch (TREE_CODE (t)) + { + case INTEGER_TYPE: + case REAL_TYPE: + case FIXED_POINT_TYPE: + case ENUMERAL_TYPE: + case UNION_TYPE: + case RECORD_TYPE: + break; + + case VAR_DECL: + case PARM_DECL: + case FIELD_DECL: + case ARRAY_TYPE: + case FUNCTION_TYPE: + case FUNCTION_DECL: + case TYPE_DECL: + pp_direct_declarator (pp, t); + break; + + + default: + pp_unsupported_tree (pp, t); + break; + } +} + +/* declaration: + declaration-specifiers init-declarator-list(opt) ; */ + +void +pp_c_declaration (c_pretty_printer *pp, tree t) +{ + pp_declaration_specifiers (pp, t); + pp_c_init_declarator (pp, t); +} + +/* Pretty-print ATTRIBUTES using GNU C extension syntax. */ + +void +pp_c_attributes (c_pretty_printer *pp, tree attributes) +{ + if (attributes == NULL_TREE) + return; + + pp_c_ws_string (pp, "__attribute__"); + pp_c_left_paren (pp); + pp_c_left_paren (pp); + for (; attributes != NULL_TREE; attributes = TREE_CHAIN (attributes)) + { + pp_tree_identifier (pp, TREE_PURPOSE (attributes)); + if (TREE_VALUE (attributes)) + pp_c_call_argument_list (pp, TREE_VALUE (attributes)); + + if (TREE_CHAIN (attributes)) + pp_separate_with (pp, ','); + } + pp_c_right_paren (pp); + pp_c_right_paren (pp); +} + +/* Pretty-print ATTRIBUTES using GNU C extension syntax for attributes + marked to be displayed on disgnostic. */ + +void +pp_c_attributes_display (c_pretty_printer *pp, tree a) +{ + bool is_first = true; + + if (a == NULL_TREE) + return; + + for (; a != NULL_TREE; a = TREE_CHAIN (a)) + { + const struct attribute_spec *as; + as = lookup_attribute_spec (TREE_PURPOSE (a)); + if (!as || as->affects_type_identity == false) + continue; + if (is_first) + { + pp_c_ws_string (pp, "__attribute__"); + pp_c_left_paren (pp); + pp_c_left_paren (pp); + is_first = false; + } + else + { + pp_separate_with (pp, ','); + } + pp_tree_identifier (pp, TREE_PURPOSE (a)); + if (TREE_VALUE (a)) + pp_c_call_argument_list (pp, TREE_VALUE (a)); + } + + if (!is_first) + { + pp_c_right_paren (pp); + pp_c_right_paren (pp); + pp_c_whitespace (pp); + } +} + +/* function-definition: + declaration-specifiers declarator compound-statement */ + +void +pp_c_function_definition (c_pretty_printer *pp, tree t) +{ + pp_declaration_specifiers (pp, t); + pp_declarator (pp, t); + pp_needs_newline (pp) = true; + pp_statement (pp, DECL_SAVED_TREE (t)); + pp_newline_and_flush (pp); +} + + +/* Expressions. */ + +/* Print out a c-char. This is called solely for characters which are + in the *target* execution character set. We ought to convert them + back to the *host* execution character set before printing, but we + have no way to do this at present. A decent compromise is to print + all characters as if they were in the host execution character set, + and not attempt to recover any named escape characters, but render + all unprintables as octal escapes. If the host and target character + sets are the same, this produces relatively readable output. If they + are not the same, strings may appear as gibberish, but that's okay + (in fact, it may well be what the reader wants, e.g. if they are looking + to see if conversion to the target character set happened correctly). + + A special case: we need to prefix \, ", and ' with backslashes. It is + correct to do so for the *host*'s \, ", and ', because the rest of the + file appears in the host character set. */ + +static void +pp_c_char (c_pretty_printer *pp, int c) +{ + if (ISPRINT (c)) + { + switch (c) + { + case '\\': pp_string (pp, "\\\\"); break; + case '\'': pp_string (pp, "\\\'"); break; + case '\"': pp_string (pp, "\\\""); break; + default: pp_character (pp, c); + } + } + else + pp_scalar (pp, "\\%03o", (unsigned) c); +} + +/* Print out a STRING literal. */ + +void +pp_c_string_literal (c_pretty_printer *pp, tree s) +{ + const char *p = TREE_STRING_POINTER (s); + int n = TREE_STRING_LENGTH (s) - 1; + int i; + pp_doublequote (pp); + for (i = 0; i < n; ++i) + pp_c_char (pp, p[i]); + pp_doublequote (pp); +} + +/* Pretty-print an INTEGER literal. */ + +static void +pp_c_integer_constant (c_pretty_printer *pp, tree i) +{ + /* We are going to compare the type of I to other types using + pointer comparison so we need to use its canonical type. */ + tree type = + TYPE_CANONICAL (TREE_TYPE (i)) + ? TYPE_CANONICAL (TREE_TYPE (i)) + : TREE_TYPE (i); + + if (host_integerp (i, 0)) + pp_wide_integer (pp, TREE_INT_CST_LOW (i)); + else if (host_integerp (i, 1)) + pp_unsigned_wide_integer (pp, TREE_INT_CST_LOW (i)); + else + { + unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (i); + HOST_WIDE_INT high = TREE_INT_CST_HIGH (i); + if (tree_int_cst_sgn (i) < 0) + { + pp_character (pp, '-'); + high = ~high + !low; + low = -low; + } + sprintf (pp_buffer (pp)->digit_buffer, HOST_WIDE_INT_PRINT_DOUBLE_HEX, + (unsigned HOST_WIDE_INT) high, (unsigned HOST_WIDE_INT) low); + pp_string (pp, pp_buffer (pp)->digit_buffer); + } + if (TYPE_UNSIGNED (type)) + pp_character (pp, 'u'); + if (type == long_integer_type_node || type == long_unsigned_type_node) + pp_character (pp, 'l'); + else if (type == long_long_integer_type_node + || type == long_long_unsigned_type_node) + pp_string (pp, "ll"); + else if (type == int128_integer_type_node + || type == int128_unsigned_type_node) + pp_string (pp, "I128"); +} + +/* Print out a CHARACTER literal. */ + +static void +pp_c_character_constant (c_pretty_printer *pp, tree c) +{ + tree type = TREE_TYPE (c); + if (type == wchar_type_node) + pp_character (pp, 'L'); + pp_quote (pp); + if (host_integerp (c, TYPE_UNSIGNED (type))) + pp_c_char (pp, tree_low_cst (c, TYPE_UNSIGNED (type))); + else + pp_scalar (pp, "\\x%x", (unsigned) TREE_INT_CST_LOW (c)); + pp_quote (pp); +} + +/* Print out a BOOLEAN literal. */ + +static void +pp_c_bool_constant (c_pretty_printer *pp, tree b) +{ + if (b == boolean_false_node) + { + if (c_dialect_cxx ()) + pp_c_ws_string (pp, "false"); + else if (flag_isoc99) + pp_c_ws_string (pp, "_False"); + else + pp_unsupported_tree (pp, b); + } + else if (b == boolean_true_node) + { + if (c_dialect_cxx ()) + pp_c_ws_string (pp, "true"); + else if (flag_isoc99) + pp_c_ws_string (pp, "_True"); + else + pp_unsupported_tree (pp, b); + } + else if (TREE_CODE (b) == INTEGER_CST) + pp_c_integer_constant (pp, b); + else + pp_unsupported_tree (pp, b); +} + +/* Attempt to print out an ENUMERATOR. Return true on success. Else return + false; that means the value was obtained by a cast, in which case + print out the type-id part of the cast-expression -- the casted value + is then printed by pp_c_integer_literal. */ + +static bool +pp_c_enumeration_constant (c_pretty_printer *pp, tree e) +{ + bool value_is_named = true; + tree type = TREE_TYPE (e); + tree value; + + /* Find the name of this constant. */ + for (value = TYPE_VALUES (type); + value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e); + value = TREE_CHAIN (value)) + ; + + if (value != NULL_TREE) + pp_id_expression (pp, TREE_PURPOSE (value)); + else + { + /* Value must have been cast. */ + pp_c_type_cast (pp, type); + value_is_named = false; + } + + return value_is_named; +} + +/* Print out a REAL value as a decimal-floating-constant. */ + +static void +pp_c_floating_constant (c_pretty_printer *pp, tree r) +{ + const struct real_format *fmt + = REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (r))); + + REAL_VALUE_TYPE floating_cst = TREE_REAL_CST (r); + bool is_decimal = floating_cst.decimal; + + /* See ISO C++ WG N1822. Note: The fraction 643/2136 approximates + log10(2) to 7 significant digits. */ + int max_digits10 = 2 + (is_decimal ? fmt->p : fmt->p * 643L / 2136); + + real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r), + sizeof (pp_buffer (pp)->digit_buffer), + max_digits10, 1); + + pp_string (pp, pp_buffer(pp)->digit_buffer); + if (TREE_TYPE (r) == float_type_node) + pp_character (pp, 'f'); + else if (TREE_TYPE (r) == long_double_type_node) + pp_character (pp, 'l'); + else if (TREE_TYPE (r) == dfloat128_type_node) + pp_string (pp, "dl"); + else if (TREE_TYPE (r) == dfloat64_type_node) + pp_string (pp, "dd"); + else if (TREE_TYPE (r) == dfloat32_type_node) + pp_string (pp, "df"); +} + +/* Print out a FIXED value as a decimal-floating-constant. */ + +static void +pp_c_fixed_constant (c_pretty_printer *pp, tree r) +{ + fixed_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_FIXED_CST (r), + sizeof (pp_buffer (pp)->digit_buffer)); + pp_string (pp, pp_buffer(pp)->digit_buffer); +} + +/* Pretty-print a compound literal expression. GNU extensions include + vector constants. */ + +static void +pp_c_compound_literal (c_pretty_printer *pp, tree e) +{ + tree type = TREE_TYPE (e); + pp_c_type_cast (pp, type); + + switch (TREE_CODE (type)) + { + case RECORD_TYPE: + case UNION_TYPE: + case ARRAY_TYPE: + case VECTOR_TYPE: + case COMPLEX_TYPE: + pp_c_brace_enclosed_initializer_list (pp, e); + break; + + default: + pp_unsupported_tree (pp, e); + break; + } +} + +/* Pretty-print a COMPLEX_EXPR expression. */ + +static void +pp_c_complex_expr (c_pretty_printer *pp, tree e) +{ + /* Handle a few common special cases, otherwise fallback + to printing it as compound literal. */ + tree type = TREE_TYPE (e); + tree realexpr = TREE_OPERAND (e, 0); + tree imagexpr = TREE_OPERAND (e, 1); + + /* Cast of an COMPLEX_TYPE expression to a different COMPLEX_TYPE. */ + if (TREE_CODE (realexpr) == NOP_EXPR + && TREE_CODE (imagexpr) == NOP_EXPR + && TREE_TYPE (realexpr) == TREE_TYPE (type) + && TREE_TYPE (imagexpr) == TREE_TYPE (type) + && TREE_CODE (TREE_OPERAND (realexpr, 0)) == REALPART_EXPR + && TREE_CODE (TREE_OPERAND (imagexpr, 0)) == IMAGPART_EXPR + && TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0) + == TREE_OPERAND (TREE_OPERAND (imagexpr, 0), 0)) + { + pp_c_type_cast (pp, type); + pp_expression (pp, TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0)); + return; + } + + /* Cast of an scalar expression to COMPLEX_TYPE. */ + if ((integer_zerop (imagexpr) || real_zerop (imagexpr)) + && TREE_TYPE (realexpr) == TREE_TYPE (type)) + { + pp_c_type_cast (pp, type); + if (TREE_CODE (realexpr) == NOP_EXPR) + realexpr = TREE_OPERAND (realexpr, 0); + pp_expression (pp, realexpr); + return; + } + + pp_c_compound_literal (pp, e); +} + +/* constant: + integer-constant + floating-constant + fixed-point-constant + enumeration-constant + character-constant */ + +void +pp_c_constant (c_pretty_printer *pp, tree e) +{ + const enum tree_code code = TREE_CODE (e); + + switch (code) + { + case INTEGER_CST: + { + tree type = TREE_TYPE (e); + if (type == boolean_type_node) + pp_c_bool_constant (pp, e); + else if (type == char_type_node) + pp_c_character_constant (pp, e); + else if (TREE_CODE (type) == ENUMERAL_TYPE + && pp_c_enumeration_constant (pp, e)) + ; + else + pp_c_integer_constant (pp, e); + } + break; + + case REAL_CST: + pp_c_floating_constant (pp, e); + break; + + case FIXED_CST: + pp_c_fixed_constant (pp, e); + break; + + case STRING_CST: + pp_c_string_literal (pp, e); + break; + + case COMPLEX_CST: + /* Sometimes, we are confused and we think a complex literal + is a constant. Such thing is a compound literal which + grammatically belongs to postfix-expr production. */ + pp_c_compound_literal (pp, e); + break; + + default: + pp_unsupported_tree (pp, e); + break; + } +} + +/* Pretty-print a string such as an identifier, without changing its + encoding, preceded by whitespace is necessary. */ + +void +pp_c_ws_string (c_pretty_printer *pp, const char *str) +{ + pp_c_maybe_whitespace (pp); + pp_string (pp, str); + pp_base (pp)->padding = pp_before; +} + +/* Pretty-print an IDENTIFIER_NODE, which may contain UTF-8 sequences + that need converting to the locale encoding, preceded by whitespace + is necessary. */ + +void +pp_c_identifier (c_pretty_printer *pp, const char *id) +{ + pp_c_maybe_whitespace (pp); + pp_identifier (pp, id); + pp_base (pp)->padding = pp_before; +} + +/* Pretty-print a C primary-expression. + primary-expression: + identifier + constant + string-literal + ( expression ) */ + +void +pp_c_primary_expression (c_pretty_printer *pp, tree e) +{ + switch (TREE_CODE (e)) + { + case VAR_DECL: + case PARM_DECL: + case FIELD_DECL: + case CONST_DECL: + case FUNCTION_DECL: + case LABEL_DECL: + pp_c_tree_decl_identifier (pp, e); + break; + + case IDENTIFIER_NODE: + pp_c_tree_identifier (pp, e); + break; + + case ERROR_MARK: + pp_c_ws_string (pp, M_("<erroneous-expression>")); + break; + + case RESULT_DECL: + pp_c_ws_string (pp, M_("<return-value>")); + break; + + case INTEGER_CST: + case REAL_CST: + case FIXED_CST: + case STRING_CST: + pp_c_constant (pp, e); + break; + + case TARGET_EXPR: + pp_c_ws_string (pp, "__builtin_memcpy"); + pp_c_left_paren (pp); + pp_ampersand (pp); + pp_primary_expression (pp, TREE_OPERAND (e, 0)); + pp_separate_with (pp, ','); + pp_ampersand (pp); + pp_initializer (pp, TREE_OPERAND (e, 1)); + if (TREE_OPERAND (e, 2)) + { + pp_separate_with (pp, ','); + pp_c_expression (pp, TREE_OPERAND (e, 2)); + } + pp_c_right_paren (pp); + break; + + default: + /* FIXME: Make sure we won't get into an infinite loop. */ + pp_c_left_paren (pp); + pp_expression (pp, e); + pp_c_right_paren (pp); + break; + } +} + +/* Print out a C initializer -- also support C compound-literals. + initializer: + assignment-expression: + { initializer-list } + { initializer-list , } */ + +static void +pp_c_initializer (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == CONSTRUCTOR) + pp_c_brace_enclosed_initializer_list (pp, e); + else + pp_expression (pp, e); +} + +/* init-declarator: + declarator: + declarator = initializer */ + +void +pp_c_init_declarator (c_pretty_printer *pp, tree t) +{ + pp_declarator (pp, t); + /* We don't want to output function definitions here. There are handled + elsewhere (and the syntactic form is bogus anyway). */ + if (TREE_CODE (t) != FUNCTION_DECL && DECL_INITIAL (t)) + { + tree init = DECL_INITIAL (t); + /* This C++ bit is handled here because it is easier to do so. + In templates, the C++ parser builds a TREE_LIST for a + direct-initialization; the TREE_PURPOSE is the variable to + initialize and the TREE_VALUE is the initializer. */ + if (TREE_CODE (init) == TREE_LIST) + { + pp_c_left_paren (pp); + pp_expression (pp, TREE_VALUE (init)); + pp_right_paren (pp); + } + else + { + pp_space (pp); + pp_equal (pp); + pp_space (pp); + pp_c_initializer (pp, init); + } + } +} + +/* initializer-list: + designation(opt) initializer + initializer-list , designation(opt) initializer + + designation: + designator-list = + + designator-list: + designator + designator-list designator + + designator: + [ constant-expression ] + identifier */ + +static void +pp_c_initializer_list (c_pretty_printer *pp, tree e) +{ + tree type = TREE_TYPE (e); + const enum tree_code code = TREE_CODE (type); + + if (TREE_CODE (e) == CONSTRUCTOR) + { + pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e)); + return; + } + + switch (code) + { + case RECORD_TYPE: + case UNION_TYPE: + case ARRAY_TYPE: + { + tree init = TREE_OPERAND (e, 0); + for (; init != NULL_TREE; init = TREE_CHAIN (init)) + { + if (code == RECORD_TYPE || code == UNION_TYPE) + { + pp_c_dot (pp); + pp_c_primary_expression (pp, TREE_PURPOSE (init)); + } + else + { + pp_c_left_bracket (pp); + if (TREE_PURPOSE (init)) + pp_c_constant (pp, TREE_PURPOSE (init)); + pp_c_right_bracket (pp); + } + pp_c_whitespace (pp); + pp_equal (pp); + pp_c_whitespace (pp); + pp_initializer (pp, TREE_VALUE (init)); + if (TREE_CHAIN (init)) + pp_separate_with (pp, ','); + } + } + return; + + case VECTOR_TYPE: + if (TREE_CODE (e) == VECTOR_CST) + { + unsigned i; + for (i = 0; i < VECTOR_CST_NELTS (e); ++i) + { + if (i > 0) + pp_separate_with (pp, ','); + pp_expression (pp, VECTOR_CST_ELT (e, i)); + } + } + else + break; + return; + + case COMPLEX_TYPE: + if (TREE_CODE (e) == COMPLEX_CST || TREE_CODE (e) == COMPLEX_EXPR) + { + const bool cst = TREE_CODE (e) == COMPLEX_CST; + pp_expression (pp, cst ? TREE_REALPART (e) : TREE_OPERAND (e, 0)); + pp_separate_with (pp, ','); + pp_expression (pp, cst ? TREE_IMAGPART (e) : TREE_OPERAND (e, 1)); + } + else + break; + return; + + default: + break; + } + + pp_unsupported_tree (pp, type); +} + +/* Pretty-print a brace-enclosed initializer-list. */ + +static void +pp_c_brace_enclosed_initializer_list (c_pretty_printer *pp, tree l) +{ + pp_c_left_brace (pp); + pp_c_initializer_list (pp, l); + pp_c_right_brace (pp); +} + + +/* This is a convenient function, used to bridge gap between C and C++ + grammars. + + id-expression: + identifier */ + +void +pp_c_id_expression (c_pretty_printer *pp, tree t) +{ + switch (TREE_CODE (t)) + { + case VAR_DECL: + case PARM_DECL: + case CONST_DECL: + case TYPE_DECL: + case FUNCTION_DECL: + case FIELD_DECL: + case LABEL_DECL: + pp_c_tree_decl_identifier (pp, t); + break; + + case IDENTIFIER_NODE: + pp_c_tree_identifier (pp, t); + break; + + default: + pp_unsupported_tree (pp, t); + break; + } +} + +/* postfix-expression: + primary-expression + postfix-expression [ expression ] + postfix-expression ( argument-expression-list(opt) ) + postfix-expression . identifier + postfix-expression -> identifier + postfix-expression ++ + postfix-expression -- + ( type-name ) { initializer-list } + ( type-name ) { initializer-list , } */ + +void +pp_c_postfix_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case POSTINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + pp_postfix_expression (pp, TREE_OPERAND (e, 0)); + pp_string (pp, code == POSTINCREMENT_EXPR ? "++" : "--"); + break; + + case ARRAY_REF: + pp_postfix_expression (pp, TREE_OPERAND (e, 0)); + pp_c_left_bracket (pp); + pp_expression (pp, TREE_OPERAND (e, 1)); + pp_c_right_bracket (pp); + break; + + case CALL_EXPR: + { + call_expr_arg_iterator iter; + tree arg; + pp_postfix_expression (pp, CALL_EXPR_FN (e)); + pp_c_left_paren (pp); + FOR_EACH_CALL_EXPR_ARG (arg, iter, e) + { + pp_expression (pp, arg); + if (more_call_expr_args_p (&iter)) + pp_separate_with (pp, ','); + } + pp_c_right_paren (pp); + break; + } + + case UNORDERED_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "isunordered" + : "__builtin_isunordered"); + goto two_args_fun; + + case ORDERED_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!isunordered" + : "!__builtin_isunordered"); + goto two_args_fun; + + case UNLT_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!isgreaterequal" + : "!__builtin_isgreaterequal"); + goto two_args_fun; + + case UNLE_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!isgreater" + : "!__builtin_isgreater"); + goto two_args_fun; + + case UNGT_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!islessequal" + : "!__builtin_islessequal"); + goto two_args_fun; + + case UNGE_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!isless" + : "!__builtin_isless"); + goto two_args_fun; + + case UNEQ_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "!islessgreater" + : "!__builtin_islessgreater"); + goto two_args_fun; + + case LTGT_EXPR: + pp_c_ws_string (pp, flag_isoc99 + ? "islessgreater" + : "__builtin_islessgreater"); + goto two_args_fun; + + two_args_fun: + pp_c_left_paren (pp); + pp_expression (pp, TREE_OPERAND (e, 0)); + pp_separate_with (pp, ','); + pp_expression (pp, TREE_OPERAND (e, 1)); + pp_c_right_paren (pp); + break; + + case ABS_EXPR: + pp_c_ws_string (pp, "__builtin_abs"); + pp_c_left_paren (pp); + pp_expression (pp, TREE_OPERAND (e, 0)); + pp_c_right_paren (pp); + break; + + case COMPONENT_REF: + { + tree object = TREE_OPERAND (e, 0); + if (TREE_CODE (object) == INDIRECT_REF) + { + pp_postfix_expression (pp, TREE_OPERAND (object, 0)); + pp_c_arrow (pp); + } + else + { + pp_postfix_expression (pp, object); + pp_c_dot (pp); + } + pp_expression (pp, TREE_OPERAND (e, 1)); + } + break; + + case BIT_FIELD_REF: + { + tree type = TREE_TYPE (e); + + type = signed_or_unsigned_type_for (TYPE_UNSIGNED (type), type); + if (type + && tree_int_cst_equal (TYPE_SIZE (type), TREE_OPERAND (e, 1))) + { + HOST_WIDE_INT bitpos = tree_low_cst (TREE_OPERAND (e, 2), 0); + HOST_WIDE_INT size = tree_low_cst (TYPE_SIZE (type), 0); + if ((bitpos % size) == 0) + { + pp_c_left_paren (pp); + pp_c_left_paren (pp); + pp_type_id (pp, type); + pp_c_star (pp); + pp_c_right_paren (pp); + pp_c_ampersand (pp); + pp_expression (pp, TREE_OPERAND (e, 0)); + pp_c_right_paren (pp); + pp_c_left_bracket (pp); + pp_wide_integer (pp, bitpos / size); + pp_c_right_bracket (pp); + break; + } + } + pp_unsupported_tree (pp, e); + } + break; + + case MEM_REF: + pp_c_expression (pp, e); + break; + + case COMPLEX_CST: + case VECTOR_CST: + pp_c_compound_literal (pp, e); + break; + + case COMPLEX_EXPR: + pp_c_complex_expr (pp, e); + break; + + case COMPOUND_LITERAL_EXPR: + e = DECL_INITIAL (COMPOUND_LITERAL_EXPR_DECL (e)); + /* Fall through. */ + case CONSTRUCTOR: + pp_initializer (pp, e); + break; + + case VA_ARG_EXPR: + pp_c_ws_string (pp, "__builtin_va_arg"); + pp_c_left_paren (pp); + pp_assignment_expression (pp, TREE_OPERAND (e, 0)); + pp_separate_with (pp, ','); + pp_type_id (pp, TREE_TYPE (e)); + pp_c_right_paren (pp); + break; + + case ADDR_EXPR: + if (TREE_CODE (TREE_OPERAND (e, 0)) == FUNCTION_DECL) + { + pp_c_id_expression (pp, TREE_OPERAND (e, 0)); + break; + } + /* else fall through. */ + + default: + pp_primary_expression (pp, e); + break; + } +} + +/* Print out an expression-list; E is expected to be a TREE_LIST. */ + +void +pp_c_expression_list (c_pretty_printer *pp, tree e) +{ + for (; e != NULL_TREE; e = TREE_CHAIN (e)) + { + pp_expression (pp, TREE_VALUE (e)); + if (TREE_CHAIN (e)) + pp_separate_with (pp, ','); + } +} + +/* Print out V, which contains the elements of a constructor. */ + +void +pp_c_constructor_elts (c_pretty_printer *pp, vec<constructor_elt, va_gc> *v) +{ + unsigned HOST_WIDE_INT ix; + tree value; + + FOR_EACH_CONSTRUCTOR_VALUE (v, ix, value) + { + pp_expression (pp, value); + if (ix != vec_safe_length (v) - 1) + pp_separate_with (pp, ','); + } +} + +/* Print out an expression-list in parens, as if it were the argument + list to a function. */ + +void +pp_c_call_argument_list (c_pretty_printer *pp, tree t) +{ + pp_c_left_paren (pp); + if (t && TREE_CODE (t) == TREE_LIST) + pp_c_expression_list (pp, t); + pp_c_right_paren (pp); +} + +/* unary-expression: + postfix-expression + ++ cast-expression + -- cast-expression + unary-operator cast-expression + sizeof unary-expression + sizeof ( type-id ) + + unary-operator: one of + * & + - ! ~ + + GNU extensions. + unary-expression: + __alignof__ unary-expression + __alignof__ ( type-id ) + __real__ unary-expression + __imag__ unary-expression */ + +void +pp_c_unary_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + pp_string (pp, code == PREINCREMENT_EXPR ? "++" : "--"); + pp_c_unary_expression (pp, TREE_OPERAND (e, 0)); + break; + + case ADDR_EXPR: + case INDIRECT_REF: + case NEGATE_EXPR: + case BIT_NOT_EXPR: + case TRUTH_NOT_EXPR: + case CONJ_EXPR: + /* String literal are used by address. */ + if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (e, 0)) != STRING_CST) + pp_ampersand (pp); + else if (code == INDIRECT_REF) + pp_c_star (pp); + else if (code == NEGATE_EXPR) + pp_minus (pp); + else if (code == BIT_NOT_EXPR || code == CONJ_EXPR) + pp_complement (pp); + else if (code == TRUTH_NOT_EXPR) + pp_exclamation (pp); + pp_c_cast_expression (pp, TREE_OPERAND (e, 0)); + break; + + case MEM_REF: + if (TREE_CODE (TREE_OPERAND (e, 0)) == ADDR_EXPR + && integer_zerop (TREE_OPERAND (e, 1))) + pp_c_expression (pp, TREE_OPERAND (TREE_OPERAND (e, 0), 0)); + else + { + pp_c_star (pp); + if (!integer_zerop (TREE_OPERAND (e, 1))) + { + pp_c_left_paren (pp); + if (!integer_onep (TYPE_SIZE_UNIT + (TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0)))))) + pp_c_type_cast (pp, ptr_type_node); + } + pp_c_cast_expression (pp, TREE_OPERAND (e, 0)); + if (!integer_zerop (TREE_OPERAND (e, 1))) + { + pp_plus (pp); + pp_c_integer_constant (pp, + fold_convert (ssizetype, + TREE_OPERAND (e, 1))); + pp_c_right_paren (pp); + } + } + break; + + case REALPART_EXPR: + case IMAGPART_EXPR: + pp_c_ws_string (pp, code == REALPART_EXPR ? "__real__" : "__imag__"); + pp_c_whitespace (pp); + pp_unary_expression (pp, TREE_OPERAND (e, 0)); + break; + + default: + pp_postfix_expression (pp, e); + break; + } +} + +/* cast-expression: + unary-expression + ( type-name ) cast-expression */ + +void +pp_c_cast_expression (c_pretty_printer *pp, tree e) +{ + switch (TREE_CODE (e)) + { + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + CASE_CONVERT: + case VIEW_CONVERT_EXPR: + pp_c_type_cast (pp, TREE_TYPE (e)); + pp_c_cast_expression (pp, TREE_OPERAND (e, 0)); + break; + + default: + pp_unary_expression (pp, e); + } +} + +/* multiplicative-expression: + cast-expression + multiplicative-expression * cast-expression + multiplicative-expression / cast-expression + multiplicative-expression % cast-expression */ + +static void +pp_c_multiplicative_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case MULT_EXPR: + case TRUNC_DIV_EXPR: + case TRUNC_MOD_EXPR: + pp_multiplicative_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + if (code == MULT_EXPR) + pp_c_star (pp); + else if (code == TRUNC_DIV_EXPR) + pp_slash (pp); + else + pp_modulo (pp); + pp_c_whitespace (pp); + pp_c_cast_expression (pp, TREE_OPERAND (e, 1)); + break; + + default: + pp_c_cast_expression (pp, e); + break; + } +} + +/* additive-expression: + multiplicative-expression + additive-expression + multiplicative-expression + additive-expression - multiplicative-expression */ + +static void +pp_c_additive_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case POINTER_PLUS_EXPR: + case PLUS_EXPR: + case MINUS_EXPR: + pp_c_additive_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + if (code == PLUS_EXPR || code == POINTER_PLUS_EXPR) + pp_plus (pp); + else + pp_minus (pp); + pp_c_whitespace (pp); + pp_multiplicative_expression (pp, TREE_OPERAND (e, 1)); + break; + + default: + pp_multiplicative_expression (pp, e); + break; + } +} + +/* additive-expression: + additive-expression + shift-expression << additive-expression + shift-expression >> additive-expression */ + +static void +pp_c_shift_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case LSHIFT_EXPR: + case RSHIFT_EXPR: + pp_c_shift_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_string (pp, code == LSHIFT_EXPR ? "<<" : ">>"); + pp_c_whitespace (pp); + pp_c_additive_expression (pp, TREE_OPERAND (e, 1)); + break; + + default: + pp_c_additive_expression (pp, e); + } +} + +/* relational-expression: + shift-expression + relational-expression < shift-expression + relational-expression > shift-expression + relational-expression <= shift-expression + relational-expression >= shift-expression */ + +static void +pp_c_relational_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case LT_EXPR: + case GT_EXPR: + case LE_EXPR: + case GE_EXPR: + pp_c_relational_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + if (code == LT_EXPR) + pp_less (pp); + else if (code == GT_EXPR) + pp_greater (pp); + else if (code == LE_EXPR) + pp_string (pp, "<="); + else if (code == GE_EXPR) + pp_string (pp, ">="); + pp_c_whitespace (pp); + pp_c_shift_expression (pp, TREE_OPERAND (e, 1)); + break; + + default: + pp_c_shift_expression (pp, e); + break; + } +} + +/* equality-expression: + relational-expression + equality-expression == relational-expression + equality-equality != relational-expression */ + +static void +pp_c_equality_expression (c_pretty_printer *pp, tree e) +{ + enum tree_code code = TREE_CODE (e); + switch (code) + { + case EQ_EXPR: + case NE_EXPR: + pp_c_equality_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_string (pp, code == EQ_EXPR ? "==" : "!="); + pp_c_whitespace (pp); + pp_c_relational_expression (pp, TREE_OPERAND (e, 1)); + break; + + default: + pp_c_relational_expression (pp, e); + break; + } +} + +/* AND-expression: + equality-expression + AND-expression & equality-equality */ + +static void +pp_c_and_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == BIT_AND_EXPR) + { + pp_c_and_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_ampersand (pp); + pp_c_whitespace (pp); + pp_c_equality_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_equality_expression (pp, e); +} + +/* exclusive-OR-expression: + AND-expression + exclusive-OR-expression ^ AND-expression */ + +static void +pp_c_exclusive_or_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == BIT_XOR_EXPR + || TREE_CODE (e) == TRUTH_XOR_EXPR) + { + pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0)); + if (TREE_CODE (e) == BIT_XOR_EXPR) + pp_c_maybe_whitespace (pp); + else + pp_c_whitespace (pp); + pp_carret (pp); + pp_c_whitespace (pp); + pp_c_and_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_and_expression (pp, e); +} + +/* inclusive-OR-expression: + exclusive-OR-expression + inclusive-OR-expression | exclusive-OR-expression */ + +static void +pp_c_inclusive_or_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == BIT_IOR_EXPR) + { + pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_bar (pp); + pp_c_whitespace (pp); + pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_exclusive_or_expression (pp, e); +} + +/* logical-AND-expression: + inclusive-OR-expression + logical-AND-expression && inclusive-OR-expression */ + +static void +pp_c_logical_and_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == TRUTH_ANDIF_EXPR + || TREE_CODE (e) == TRUTH_AND_EXPR) + { + pp_c_logical_and_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_string (pp, "&&"); + pp_c_whitespace (pp); + pp_c_inclusive_or_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_inclusive_or_expression (pp, e); +} + +/* logical-OR-expression: + logical-AND-expression + logical-OR-expression || logical-AND-expression */ + +void +pp_c_logical_or_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == TRUTH_ORIF_EXPR + || TREE_CODE (e) == TRUTH_OR_EXPR) + { + pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_string (pp, "||"); + pp_c_whitespace (pp); + pp_c_logical_and_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_logical_and_expression (pp, e); +} + +/* conditional-expression: + logical-OR-expression + logical-OR-expression ? expression : conditional-expression */ + +static void +pp_c_conditional_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == COND_EXPR) + { + pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_question (pp); + pp_c_whitespace (pp); + pp_expression (pp, TREE_OPERAND (e, 1)); + pp_c_whitespace (pp); + pp_colon (pp); + pp_c_whitespace (pp); + pp_c_conditional_expression (pp, TREE_OPERAND (e, 2)); + } + else + pp_c_logical_or_expression (pp, e); +} + + +/* assignment-expression: + conditional-expression + unary-expression assignment-operator assignment-expression + + assignment-expression: one of + = *= /= %= += -= >>= <<= &= ^= |= */ + +static void +pp_c_assignment_expression (c_pretty_printer *pp, tree e) +{ + if (TREE_CODE (e) == MODIFY_EXPR + || TREE_CODE (e) == INIT_EXPR) + { + pp_c_unary_expression (pp, TREE_OPERAND (e, 0)); + pp_c_whitespace (pp); + pp_equal (pp); + pp_space (pp); + pp_c_expression (pp, TREE_OPERAND (e, 1)); + } + else + pp_c_conditional_expression (pp, e); +} + +/* expression: + assignment-expression + expression , assignment-expression + + Implementation note: instead of going through the usual recursion + chain, I take the liberty of dispatching nodes to the appropriate + functions. This makes some redundancy, but it worths it. That also + prevents a possible infinite recursion between pp_c_primary_expression () + and pp_c_expression (). */ + +void +pp_c_expression (c_pretty_printer *pp, tree e) +{ + switch (TREE_CODE (e)) + { + case INTEGER_CST: + pp_c_integer_constant (pp, e); + break; + + case REAL_CST: + pp_c_floating_constant (pp, e); + break; + + case FIXED_CST: + pp_c_fixed_constant (pp, e); + break; + + case STRING_CST: + pp_c_string_literal (pp, e); + break; + + case IDENTIFIER_NODE: + case FUNCTION_DECL: + case VAR_DECL: + case CONST_DECL: + case PARM_DECL: + case RESULT_DECL: + case FIELD_DECL: + case LABEL_DECL: + case ERROR_MARK: + pp_primary_expression (pp, e); + break; + + case SSA_NAME: + if (SSA_NAME_VAR (e) + && !DECL_ARTIFICIAL (SSA_NAME_VAR (e))) + pp_c_expression (pp, SSA_NAME_VAR (e)); + else + pp_c_ws_string (pp, M_("<unknown>")); + break; + + case POSTINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + case ARRAY_REF: + case CALL_EXPR: + case COMPONENT_REF: + case BIT_FIELD_REF: + case COMPLEX_CST: + case COMPLEX_EXPR: + case VECTOR_CST: + case ORDERED_EXPR: + case UNORDERED_EXPR: + case LTGT_EXPR: + case UNEQ_EXPR: + case UNLE_EXPR: + case UNLT_EXPR: + case UNGE_EXPR: + case UNGT_EXPR: + case ABS_EXPR: + case CONSTRUCTOR: + case COMPOUND_LITERAL_EXPR: + case VA_ARG_EXPR: + pp_postfix_expression (pp, e); + break; + + case CONJ_EXPR: + case ADDR_EXPR: + case INDIRECT_REF: + case MEM_REF: + case NEGATE_EXPR: + case BIT_NOT_EXPR: + case TRUTH_NOT_EXPR: + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case REALPART_EXPR: + case IMAGPART_EXPR: + pp_c_unary_expression (pp, e); + break; + + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + CASE_CONVERT: + case VIEW_CONVERT_EXPR: + pp_c_cast_expression (pp, e); + break; + + case MULT_EXPR: + case TRUNC_MOD_EXPR: + case TRUNC_DIV_EXPR: + pp_multiplicative_expression (pp, e); + break; + + case LSHIFT_EXPR: + case RSHIFT_EXPR: + pp_c_shift_expression (pp, e); + break; + + case LT_EXPR: + case GT_EXPR: + case LE_EXPR: + case GE_EXPR: + pp_c_relational_expression (pp, e); + break; + + case BIT_AND_EXPR: + pp_c_and_expression (pp, e); + break; + + case BIT_XOR_EXPR: + case TRUTH_XOR_EXPR: + pp_c_exclusive_or_expression (pp, e); + break; + + case BIT_IOR_EXPR: + pp_c_inclusive_or_expression (pp, e); + break; + + case TRUTH_ANDIF_EXPR: + case TRUTH_AND_EXPR: + pp_c_logical_and_expression (pp, e); + break; + + case TRUTH_ORIF_EXPR: + case TRUTH_OR_EXPR: + pp_c_logical_or_expression (pp, e); + break; + + case EQ_EXPR: + case NE_EXPR: + pp_c_equality_expression (pp, e); + break; + + case COND_EXPR: + pp_conditional_expression (pp, e); + break; + + case POINTER_PLUS_EXPR: + case PLUS_EXPR: + case MINUS_EXPR: + pp_c_additive_expression (pp, e); + break; + + case MODIFY_EXPR: + case INIT_EXPR: + pp_assignment_expression (pp, e); + break; + + case COMPOUND_EXPR: + pp_c_left_paren (pp); + pp_expression (pp, TREE_OPERAND (e, 0)); + pp_separate_with (pp, ','); + pp_assignment_expression (pp, TREE_OPERAND (e, 1)); + pp_c_right_paren (pp); + break; + + case NON_LVALUE_EXPR: + case SAVE_EXPR: + pp_expression (pp, TREE_OPERAND (e, 0)); + break; + + case TARGET_EXPR: + pp_postfix_expression (pp, TREE_OPERAND (e, 1)); + break; + + case BIND_EXPR: + case GOTO_EXPR: + /* We don't yet have a way of dumping statements in a + human-readable format. */ + pp_string (pp, "({...})"); + break; + + case C_MAYBE_CONST_EXPR: + pp_c_expression (pp, C_MAYBE_CONST_EXPR_EXPR (e)); + break; + + default: + pp_unsupported_tree (pp, e); + break; + } +} + + + +/* Statements. */ + +void +pp_c_statement (c_pretty_printer *pp, tree stmt) +{ + if (stmt == NULL) + return; + + if (pp_needs_newline (pp)) + pp_newline_and_indent (pp, 0); + + dump_generic_node (pp_base (pp), stmt, pp_indentation (pp), 0, true); +} + + +/* Initialize the PRETTY-PRINTER for handling C codes. */ + +void +pp_c_pretty_printer_init (c_pretty_printer *pp) +{ + pp->offset_list = 0; + + pp->flags = 0; + + pp->declaration = pp_c_declaration; + pp->declaration_specifiers = pp_c_declaration_specifiers; + pp->declarator = pp_c_declarator; + pp->direct_declarator = pp_c_direct_declarator; + pp->type_specifier_seq = pp_c_specifier_qualifier_list; + pp->abstract_declarator = pp_c_abstract_declarator; + pp->direct_abstract_declarator = pp_c_direct_abstract_declarator; + pp->ptr_operator = pp_c_pointer; + pp->parameter_list = pp_c_parameter_type_list; + pp->type_id = pp_c_type_id; + pp->simple_type_specifier = pp_c_type_specifier; + pp->function_specifier = pp_c_function_specifier; + pp->storage_class_specifier = pp_c_storage_class_specifier; + + pp->statement = pp_c_statement; + + pp->constant = pp_c_constant; + pp->id_expression = pp_c_id_expression; + pp->primary_expression = pp_c_primary_expression; + pp->postfix_expression = pp_c_postfix_expression; + pp->unary_expression = pp_c_unary_expression; + pp->initializer = pp_c_initializer; + pp->multiplicative_expression = pp_c_multiplicative_expression; + pp->conditional_expression = pp_c_conditional_expression; + pp->assignment_expression = pp_c_assignment_expression; + pp->expression = pp_c_expression; +} + + +/* Print the tree T in full, on file FILE. */ + +void +print_c_tree (FILE *file, tree t) +{ + static c_pretty_printer pp_rec; + static bool initialized = 0; + c_pretty_printer *pp = &pp_rec; + + if (!initialized) + { + initialized = 1; + pp_construct (pp_base (pp), NULL, 0); + pp_c_pretty_printer_init (pp); + pp_needs_newline (pp) = true; + } + pp_base (pp)->buffer->stream = file; + + pp_statement (pp, t); + + pp_newline_and_flush (pp); +} + +/* Print the tree T in full, on stderr. */ + +DEBUG_FUNCTION void +debug_c_tree (tree t) +{ + print_c_tree (stderr, t); + fputc ('\n', stderr); +} + +/* Output the DECL_NAME of T. If T has no DECL_NAME, output a string made + up of T's memory address. */ + +void +pp_c_tree_decl_identifier (c_pretty_printer *pp, tree t) +{ + const char *name; + + gcc_assert (DECL_P (t)); + + if (DECL_NAME (t)) + name = IDENTIFIER_POINTER (DECL_NAME (t)); + else + { + static char xname[8]; + sprintf (xname, "<U%4x>", ((unsigned)((uintptr_t)(t) & 0xffff))); + name = xname; + } + + pp_c_identifier (pp, name); +} |