X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=ac0ac87e5d9aff62f3d70b405c650b73ba1f8990;hb=296ba6e16420b89723d1a5b1217d6ecfc2fb0c7d;hp=f256e13f53c21faa0d388b459eb3934bf4687ce4;hpb=2c26c7a7885635fc12bda81d06b334f9726a70df;p=cparser diff --git a/ast.c b/ast.c index f256e13..ac0ac87 100644 --- a/ast.c +++ b/ast.c @@ -47,11 +47,9 @@ struct obstack ast_obstack; static int indent; +static int case_indent; -/** If set, implicit casts are printed. */ bool print_implicit_casts = false; - -/** If set parenthesis are printed to indicate operator precedence. */ bool print_parenthesis = false; static void print_statement(const statement_t *statement); @@ -66,19 +64,7 @@ void change_indent(int delta) void print_indent(void) { for (int i = 0; i < indent; ++i) - print_string("\t"); -} - -static void print_symbol(const symbol_t *symbol) -{ - print_string(symbol->string); -} - -static void print_stringrep(const string_t *string) -{ - for (size_t i = 0; i < string->size; ++i) { - print_char(string->begin[i]); - } + print_char('\t'); } /** @@ -108,93 +94,86 @@ static int right_to_left(unsigned precedence) static unsigned get_expression_precedence(expression_kind_t kind) { static const unsigned prec[] = { - [EXPR_UNKNOWN] = PREC_PRIMARY, - [EXPR_INVALID] = PREC_PRIMARY, - [EXPR_REFERENCE] = PREC_PRIMARY, - [EXPR_REFERENCE_ENUM_VALUE] = PREC_PRIMARY, - [EXPR_LITERAL_INTEGER] = PREC_PRIMARY, - [EXPR_LITERAL_INTEGER_OCTAL] = PREC_PRIMARY, - [EXPR_LITERAL_INTEGER_HEXADECIMAL] = PREC_PRIMARY, - [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY, - [EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL] = PREC_PRIMARY, - [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY, - [EXPR_LITERAL_WIDE_CHARACTER] = PREC_PRIMARY, - [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY, - [EXPR_STRING_LITERAL] = PREC_PRIMARY, - [EXPR_WIDE_STRING_LITERAL] = PREC_PRIMARY, - [EXPR_COMPOUND_LITERAL] = PREC_UNARY, - [EXPR_CALL] = PREC_POSTFIX, - [EXPR_CONDITIONAL] = PREC_CONDITIONAL, - [EXPR_SELECT] = PREC_POSTFIX, - [EXPR_ARRAY_ACCESS] = PREC_POSTFIX, - [EXPR_SIZEOF] = PREC_UNARY, - [EXPR_CLASSIFY_TYPE] = PREC_UNARY, - [EXPR_ALIGNOF] = PREC_UNARY, - - [EXPR_FUNCNAME] = PREC_PRIMARY, - [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY, - [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY, - [EXPR_OFFSETOF] = PREC_PRIMARY, - [EXPR_VA_START] = PREC_PRIMARY, - [EXPR_VA_ARG] = PREC_PRIMARY, - [EXPR_VA_COPY] = PREC_PRIMARY, - [EXPR_STATEMENT] = PREC_PRIMARY, - [EXPR_LABEL_ADDRESS] = PREC_PRIMARY, - - [EXPR_UNARY_NEGATE] = PREC_UNARY, - [EXPR_UNARY_PLUS] = PREC_UNARY, - [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY, - [EXPR_UNARY_NOT] = PREC_UNARY, - [EXPR_UNARY_DEREFERENCE] = PREC_UNARY, - [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY, - [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX, - [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX, - [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY, - [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY, - [EXPR_UNARY_CAST] = PREC_UNARY, - [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY, - [EXPR_UNARY_ASSUME] = PREC_PRIMARY, - [EXPR_UNARY_DELETE] = PREC_UNARY, - [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY, - [EXPR_UNARY_THROW] = PREC_ASSIGNMENT, - - [EXPR_BINARY_ADD] = PREC_ADDITIVE, - [EXPR_BINARY_SUB] = PREC_ADDITIVE, - [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE, - [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE, - [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE, - [EXPR_BINARY_EQUAL] = PREC_EQUALITY, - [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY, - [EXPR_BINARY_LESS] = PREC_RELATIONAL, - [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL, - [EXPR_BINARY_GREATER] = PREC_RELATIONAL, - [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL, - [EXPR_BINARY_BITWISE_AND] = PREC_AND, - [EXPR_BINARY_BITWISE_OR] = PREC_OR, - [EXPR_BINARY_BITWISE_XOR] = PREC_XOR, - [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND, - [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR, - [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT, - [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT, - [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT, - [EXPR_BINARY_COMMA] = PREC_EXPRESSION, - - [EXPR_BINARY_ISGREATER] = PREC_PRIMARY, - [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY, - [EXPR_BINARY_ISLESS] = PREC_PRIMARY, - [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY, - [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY, - [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY + [EXPR_ERROR] = PREC_PRIMARY, + [EXPR_REFERENCE] = PREC_PRIMARY, + [EXPR_ENUM_CONSTANT] = PREC_PRIMARY, + [EXPR_LITERAL_INTEGER] = PREC_PRIMARY, + [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY, + [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY, + [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY, + [EXPR_STRING_LITERAL] = PREC_PRIMARY, + [EXPR_COMPOUND_LITERAL] = PREC_UNARY, + [EXPR_CALL] = PREC_POSTFIX, + [EXPR_CONDITIONAL] = PREC_CONDITIONAL, + [EXPR_SELECT] = PREC_POSTFIX, + [EXPR_ARRAY_ACCESS] = PREC_POSTFIX, + [EXPR_SIZEOF] = PREC_UNARY, + [EXPR_CLASSIFY_TYPE] = PREC_UNARY, + [EXPR_ALIGNOF] = PREC_UNARY, + + [EXPR_FUNCNAME] = PREC_PRIMARY, + [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY, + [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY, + [EXPR_OFFSETOF] = PREC_PRIMARY, + [EXPR_VA_START] = PREC_PRIMARY, + [EXPR_VA_ARG] = PREC_PRIMARY, + [EXPR_VA_COPY] = PREC_PRIMARY, + [EXPR_STATEMENT] = PREC_PRIMARY, + [EXPR_LABEL_ADDRESS] = PREC_PRIMARY, + + [EXPR_UNARY_NEGATE] = PREC_UNARY, + [EXPR_UNARY_PLUS] = PREC_UNARY, + [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY, + [EXPR_UNARY_NOT] = PREC_UNARY, + [EXPR_UNARY_DEREFERENCE] = PREC_UNARY, + [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY, + [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX, + [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX, + [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY, + [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY, + [EXPR_UNARY_CAST] = PREC_UNARY, + [EXPR_UNARY_ASSUME] = PREC_PRIMARY, + [EXPR_UNARY_DELETE] = PREC_UNARY, + [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY, + [EXPR_UNARY_THROW] = PREC_ASSIGNMENT, + + [EXPR_BINARY_ADD] = PREC_ADDITIVE, + [EXPR_BINARY_SUB] = PREC_ADDITIVE, + [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_EQUAL] = PREC_EQUALITY, + [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY, + [EXPR_BINARY_LESS] = PREC_RELATIONAL, + [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL, + [EXPR_BINARY_GREATER] = PREC_RELATIONAL, + [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL, + [EXPR_BINARY_BITWISE_AND] = PREC_AND, + [EXPR_BINARY_BITWISE_OR] = PREC_OR, + [EXPR_BINARY_BITWISE_XOR] = PREC_XOR, + [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND, + [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR, + [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT, + [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT, + [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_COMMA] = PREC_EXPRESSION, + + [EXPR_BINARY_ISGREATER] = PREC_PRIMARY, + [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY, + [EXPR_BINARY_ISLESS] = PREC_PRIMARY, + [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY, + [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY, + [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY }; assert((size_t)kind < lengthof(prec)); unsigned res = prec[kind]; @@ -208,17 +187,17 @@ static unsigned get_expression_precedence(expression_kind_t kind) * * @param string the string constant * @param border the border char - * @param skip number of chars to skip at the end */ -static void print_quoted_string(const string_t *const string, char border, - int skip) +static void print_quoted_string(const string_t *const string, char border) { + print_string(get_string_encoding_prefix(string->encoding)); + print_char(border); - const char *end = string->begin + string->size - skip; + const char *end = string->begin + string->size; for (const char *c = string->begin; c != end; ++c) { - unsigned char const tc = *c; + const char tc = *c; if (tc == border) { - print_string("\\"); + print_char('\\'); } switch (tc) { case '\\': print_string("\\\\"); break; @@ -236,7 +215,7 @@ static void print_quoted_string(const string_t *const string, char border, } /* FALLTHROUGH */ default: - if (tc < 0x80 && !isprint(tc)) { + if ((unsigned)tc < 0x80 && !isprint(tc)) { print_format("\\%03o", (unsigned)tc); } else { print_char(tc); @@ -247,12 +226,9 @@ static void print_quoted_string(const string_t *const string, char border, print_char(border); } -static void print_string_literal(const string_literal_expression_t *literal) +static void print_string_literal(string_literal_expression_t const *const literal, char const delimiter) { - if (literal->base.kind == EXPR_WIDE_STRING_LITERAL) { - print_char('L'); - } - print_quoted_string(&literal->value, '"', 1); + print_quoted_string(&literal->value, delimiter); } static void print_literal(const literal_expression_t *literal) @@ -261,24 +237,13 @@ static void print_literal(const literal_expression_t *literal) case EXPR_LITERAL_MS_NOOP: print_string("__noop"); return; - case EXPR_LITERAL_INTEGER_HEXADECIMAL: - case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: - print_string("0x"); - /* FALLTHROUGH */ + case EXPR_LITERAL_BOOLEAN: - case EXPR_LITERAL_INTEGER: - case EXPR_LITERAL_INTEGER_OCTAL: case EXPR_LITERAL_FLOATINGPOINT: - print_stringrep(&literal->value); - if (literal->suffix != NULL) - print_symbol(literal->suffix); - return; - case EXPR_LITERAL_WIDE_CHARACTER: - print_char('L'); - /* FALLTHROUGH */ - case EXPR_LITERAL_CHARACTER: - print_quoted_string(&literal->value, '\'', 0); + case EXPR_LITERAL_INTEGER: + print_string(literal->value.begin); return; + default: break; } @@ -303,9 +268,9 @@ static void print_funcname(const funcname_expression_t *funcname) static void print_compound_literal( const compound_literal_expression_t *expression) { - print_string("("); + print_char('('); print_type(expression->type); - print_string(")"); + print_char(')'); print_initializer(expression->initializer); } @@ -322,20 +287,14 @@ static void print_assignment_expression(const expression_t *const expr) static void print_call_expression(const call_expression_t *call) { print_expression_prec(call->function, PREC_POSTFIX); - print_string("("); - call_argument_t *argument = call->arguments; - int first = 1; - while (argument != NULL) { - if (!first) { - print_string(", "); - } else { - first = 0; - } - print_assignment_expression(argument->expression); - - argument = argument->next; + print_char('('); + char const *sep = ""; + for (call_argument_t const *arg = call->arguments; arg; arg = arg->next) { + print_string(sep); + sep = ", "; + print_assignment_expression(arg->expression); } - print_string(")"); + print_char(')'); } /** @@ -397,14 +356,14 @@ static void print_unary_expression(const unary_expression_t *unexpr) { unsigned prec = get_expression_precedence(unexpr->base.kind); switch (unexpr->base.kind) { - case EXPR_UNARY_NEGATE: print_string("-"); break; - case EXPR_UNARY_PLUS: print_string("+"); break; - case EXPR_UNARY_NOT: print_string("!"); break; - case EXPR_UNARY_BITWISE_NEGATE: print_string("~"); break; + case EXPR_UNARY_NEGATE: print_char ('-' ); break; + case EXPR_UNARY_PLUS: print_char ('+' ); break; + case EXPR_UNARY_NOT: print_char ('!' ); break; + case EXPR_UNARY_BITWISE_NEGATE: print_char ('~' ); break; case EXPR_UNARY_PREFIX_INCREMENT: print_string("++"); break; case EXPR_UNARY_PREFIX_DECREMENT: print_string("--"); break; - case EXPR_UNARY_DEREFERENCE: print_string("*"); break; - case EXPR_UNARY_TAKE_ADDRESS: print_string("&"); break; + case EXPR_UNARY_DEREFERENCE: print_char ('*' ); break; + case EXPR_UNARY_TAKE_ADDRESS: print_char ('&' ); break; case EXPR_UNARY_DELETE: print_string("delete "); break; case EXPR_UNARY_DELETE_ARRAY: print_string("delete [] "); break; @@ -416,16 +375,15 @@ static void print_unary_expression(const unary_expression_t *unexpr) print_expression_prec(unexpr->value, prec); print_string("--"); return; - case EXPR_UNARY_CAST_IMPLICIT: case EXPR_UNARY_CAST: - print_string("("); + print_char('('); print_type(unexpr->base.type); - print_string(")"); + print_char(')'); break; case EXPR_UNARY_ASSUME: print_string("__assume("); print_assignment_expression(unexpr->value); - print_string(")"); + print_char(')'); return; case EXPR_UNARY_THROW: @@ -471,14 +429,14 @@ static void print_array_expression(const array_access_expression_t *expression) { if (!expression->flipped) { print_expression_prec(expression->array_ref, PREC_POSTFIX); - print_string("["); + print_char('['); print_expression(expression->index); - print_string("]"); + print_char(']'); } else { print_expression_prec(expression->index, PREC_POSTFIX); - print_string("["); + print_char('['); print_expression(expression->array_ref); - print_string("]"); + print_char(']'); } } @@ -489,19 +447,18 @@ static void print_array_expression(const array_access_expression_t *expression) */ static void print_typeprop_expression(const typeprop_expression_t *expression) { - if (expression->base.kind == EXPR_SIZEOF) { - print_string("sizeof"); - } else { - assert(expression->base.kind == EXPR_ALIGNOF); - print_string("__alignof__"); + switch (expression->base.kind) { + case EXPR_SIZEOF: print_string("sizeof"); break; + case EXPR_ALIGNOF: print_string(c_mode & _C11 ? "_Alignof" : "__alignof__"); break; + default: panic("invalid typeprop kind"); } if (expression->tp_expression != NULL) { /* PREC_TOP: always print the '()' here, sizeof x is right but unusual */ print_expression_prec(expression->tp_expression, PREC_TOP); } else { - print_string("("); + print_char('('); print_type(expression->type); - print_string(")"); + print_char(')'); } } @@ -514,7 +471,7 @@ static void print_builtin_constant(const builtin_constant_expression_t *expressi { print_string("__builtin_constant_p("); print_assignment_expression(expression->value); - print_string(")"); + print_char(')'); } /** @@ -529,7 +486,7 @@ static void print_builtin_types_compatible( print_type(expression->left); print_string(", "); print_type(expression->right); - print_string(")"); + print_char(')'); } /** @@ -561,8 +518,8 @@ static void print_va_start(const va_start_expression_t *const expression) print_string("__builtin_va_start("); print_assignment_expression(expression->ap); print_string(", "); - print_string(expression->parameter->base.base.symbol->string); - print_string(")"); + print_assignment_expression(expression->parameter); + print_char(')'); } /** @@ -576,7 +533,7 @@ static void print_va_arg(const va_arg_expression_t *expression) print_assignment_expression(expression->ap); print_string(", "); print_type(expression->base.type); - print_string(")"); + print_char(')'); } /** @@ -590,7 +547,7 @@ static void print_va_copy(const va_copy_expression_t *expression) print_assignment_expression(expression->dst); print_string(", "); print_assignment_expression(expression->src); - print_string(")"); + print_char(')'); } /** @@ -601,10 +558,16 @@ static void print_va_copy(const va_copy_expression_t *expression) static void print_select(const select_expression_t *expression) { print_expression_prec(expression->compound, PREC_POSTFIX); + /* do not print anything for anonymous struct/union selects + * FIXME: if the anonymous select was a '->' this will print '.' + */ + if (expression->compound_entry->base.symbol == NULL) + return; + if (is_type_pointer(skip_typeref(expression->compound->base.type))) { print_string("->"); } else { - print_string("."); + print_char('.'); } print_string(expression->compound_entry->base.symbol->string); } @@ -619,7 +582,7 @@ static void print_classify_type_expression( { print_string("__builtin_classify_type("); print_assignment_expression(expr->type_expression); - print_string(")"); + print_char(')'); } /** @@ -631,11 +594,11 @@ static void print_designator(const designator_t *designator) { for ( ; designator != NULL; designator = designator->next) { if (designator->symbol == NULL) { - print_string("["); + print_char('['); print_expression(designator->array_index); - print_string("]"); + print_char(']'); } else { - print_string("."); + print_char('.'); print_string(designator->symbol->string); } } @@ -650,9 +613,9 @@ static void print_offsetof_expression(const offsetof_expression_t *expression) { print_string("__builtin_offsetof("); print_type(expression->type); - print_string(","); + print_char(','); print_designator(expression->designator); - print_string(")"); + print_char(')'); } /** @@ -662,9 +625,36 @@ static void print_offsetof_expression(const offsetof_expression_t *expression) */ static void print_statement_expression(const statement_expression_t *expression) { - print_string("("); + print_char('('); print_statement(expression->statement); - print_string(")"); + print_char(')'); +} + +static bool needs_parentheses(expression_t const *const expr, unsigned const top_prec) +{ + if (expr->base.parenthesized) + return true; + + if (top_prec > get_expression_precedence(expr->base.kind)) + return true; + + if (print_parenthesis && top_prec != PREC_BOTTOM) { + switch (expr->kind) { + case EXPR_ENUM_CONSTANT: + case EXPR_FUNCNAME: + case EXPR_LITERAL_CASES: + case EXPR_LITERAL_CHARACTER: + case EXPR_REFERENCE: + case EXPR_STRING_LITERAL: + /* Do not print () around subexpressions consisting of a single token. */ + return false; + + default: + return true; + } + } + + return false; } /** @@ -673,100 +663,63 @@ static void print_statement_expression(const statement_expression_t *expression) * @param expression the expression to print * @param top_prec the precedence of the user of this expression. */ -static void print_expression_prec(const expression_t *expression, unsigned top_prec) +static void print_expression_prec(expression_t const *expr, unsigned const top_prec) { - if (expression->kind == EXPR_UNARY_CAST_IMPLICIT && !print_implicit_casts) { - expression = expression->unary.value; + if (expr->kind == EXPR_UNARY_CAST && expr->base.implicit && !print_implicit_casts) { + expr = expr->unary.value; } - bool parenthesized = - expression->base.parenthesized || - (print_parenthesis && top_prec != PREC_BOTTOM) || - top_prec > get_expression_precedence(expression->base.kind); + bool const parenthesized = needs_parentheses(expr, top_prec); if (parenthesized) - print_string("("); - switch (expression->kind) { - case EXPR_UNKNOWN: - case EXPR_INVALID: - print_string("$invalid expression$"); - break; - case EXPR_WIDE_STRING_LITERAL: - case EXPR_STRING_LITERAL: - print_string_literal(&expression->string_literal); - break; - EXPR_LITERAL_CASES - print_literal(&expression->literal); - break; - case EXPR_FUNCNAME: - print_funcname(&expression->funcname); - break; - case EXPR_COMPOUND_LITERAL: - print_compound_literal(&expression->compound_literal); - break; - case EXPR_CALL: - print_call_expression(&expression->call); - break; - EXPR_BINARY_CASES - print_binary_expression(&expression->binary); - break; - case EXPR_REFERENCE: - case EXPR_REFERENCE_ENUM_VALUE: - print_reference_expression(&expression->reference); - break; - case EXPR_ARRAY_ACCESS: - print_array_expression(&expression->array_access); - break; - case EXPR_LABEL_ADDRESS: - print_label_address_expression(&expression->label_address); - break; - EXPR_UNARY_CASES - print_unary_expression(&expression->unary); - break; - case EXPR_SIZEOF: + print_char('('); + switch (expr->kind) { case EXPR_ALIGNOF: - print_typeprop_expression(&expression->typeprop); - break; - case EXPR_BUILTIN_CONSTANT_P: - print_builtin_constant(&expression->builtin_constant); - break; - case EXPR_BUILTIN_TYPES_COMPATIBLE_P: - print_builtin_types_compatible(&expression->builtin_types_compatible); - break; - case EXPR_CONDITIONAL: - print_conditional(&expression->conditional); - break; - case EXPR_VA_START: - print_va_start(&expression->va_starte); - break; - case EXPR_VA_ARG: - print_va_arg(&expression->va_arge); - break; - case EXPR_VA_COPY: - print_va_copy(&expression->va_copye); - break; - case EXPR_SELECT: - print_select(&expression->select); - break; - case EXPR_CLASSIFY_TYPE: - print_classify_type_expression(&expression->classify_type); - break; - case EXPR_OFFSETOF: - print_offsetof_expression(&expression->offsetofe); + case EXPR_SIZEOF: print_typeprop_expression( &expr->typeprop); break; + case EXPR_ARRAY_ACCESS: print_array_expression( &expr->array_access); break; + case EXPR_BINARY_CASES: print_binary_expression( &expr->binary); break; + case EXPR_BUILTIN_CONSTANT_P: print_builtin_constant( &expr->builtin_constant); break; + case EXPR_BUILTIN_TYPES_COMPATIBLE_P: print_builtin_types_compatible(&expr->builtin_types_compatible); break; + case EXPR_CALL: print_call_expression( &expr->call); break; + case EXPR_CLASSIFY_TYPE: print_classify_type_expression(&expr->classify_type); break; + case EXPR_COMPOUND_LITERAL: print_compound_literal( &expr->compound_literal); break; + case EXPR_CONDITIONAL: print_conditional( &expr->conditional); break; + case EXPR_ERROR: print_string("$error$"); break; + case EXPR_FUNCNAME: print_funcname( &expr->funcname); break; + case EXPR_LABEL_ADDRESS: print_label_address_expression(&expr->label_address); break; + case EXPR_LITERAL_CASES: print_literal( &expr->literal); break; + case EXPR_LITERAL_CHARACTER: print_string_literal( &expr->string_literal, '\''); break; + case EXPR_OFFSETOF: print_offsetof_expression( &expr->offsetofe); break; + case EXPR_REFERENCE: + case EXPR_ENUM_CONSTANT: print_reference_expression( &expr->reference); break; + case EXPR_SELECT: print_select( &expr->select); break; + case EXPR_STATEMENT: print_statement_expression( &expr->statement); break; + case EXPR_STRING_LITERAL: print_string_literal( &expr->string_literal, '"'); break; + case EXPR_UNARY_CASES: print_unary_expression( &expr->unary); break; + case EXPR_VA_ARG: print_va_arg( &expr->va_arge); break; + case EXPR_VA_COPY: print_va_copy( &expr->va_copye); break; + case EXPR_VA_START: print_va_start( &expr->va_starte); break; + } + if (parenthesized) + print_char(')'); +} + +static void print_indented_statement(statement_t const *const stmt) +{ + switch (stmt->kind) { + case STATEMENT_LABEL: break; - case EXPR_STATEMENT: - print_statement_expression(&expression->statement); + + case STATEMENT_CASE_LABEL: + for (int i = 0; i != case_indent; ++i) + print_char('\t'); break; -#if 0 default: - /* TODO */ - print_format("some expression of type %d", (int)expression->kind); + print_indent(); break; -#endif } - if (parenthesized) - print_string(")"); + print_statement(stmt); } /** @@ -779,19 +732,14 @@ static void print_compound_statement(const compound_statement_t *block) print_string("{\n"); ++indent; - statement_t *statement = block->statements; - while (statement != NULL) { - if (statement->base.kind == STATEMENT_CASE_LABEL) - --indent; - if (statement->kind != STATEMENT_LABEL) - print_indent(); - print_statement(statement); - - statement = statement->base.next; + for (statement_t const *stmt = block->statements; stmt; stmt = stmt->base.next) { + print_indented_statement(stmt); + print_char('\n'); } + --indent; print_indent(); - print_string(block->stmt_expr ? "}" : "}\n"); + print_char('}'); } /** @@ -805,9 +753,9 @@ static void print_return_statement(const return_statement_t *statement) if (val != NULL) { print_string("return "); print_expression(val); - print_string(";\n"); + print_char(';'); } else { - print_string("return;\n"); + print_string("return;"); } } @@ -819,7 +767,19 @@ static void print_return_statement(const return_statement_t *statement) static void print_expression_statement(const expression_statement_t *statement) { print_expression(statement->expression); - print_string(";\n"); + print_char(';'); +} + +/** + * Print a computed goto statement. + * + * @param statement the computed goto statement + */ +static void print_computed_goto_statement(computed_goto_statement_t const *const stmt) +{ + print_string("goto *"); + print_expression(stmt->expression); + print_char(';'); } /** @@ -830,13 +790,8 @@ static void print_expression_statement(const expression_statement_t *statement) static void print_goto_statement(const goto_statement_t *statement) { print_string("goto "); - if (statement->expression != NULL) { - print_string("*"); - print_expression(statement->expression); - } else { - print_string(statement->label->base.symbol->string); - } - print_string(";\n"); + print_string(statement->label->base.symbol->string); + print_char(';'); } /** @@ -847,8 +802,30 @@ static void print_goto_statement(const goto_statement_t *statement) static void print_label_statement(const label_statement_t *statement) { print_format("%s:\n", statement->label->base.symbol->string); - print_indent(); - print_statement(statement->statement); + print_indented_statement(statement->statement); +} + +static void print_inner_statement(statement_t const *const stmt) +{ + if (stmt->kind == STATEMENT_COMPOUND) { + print_char(' '); + print_compound_statement(&stmt->compound); + } else { + print_char('\n'); + ++indent; + print_indented_statement(stmt); + --indent; + } +} + +static void print_after_inner_statement(statement_t const *const stmt) +{ + if (stmt->kind == STATEMENT_COMPOUND) { + print_char(' '); + } else { + print_char('\n'); + print_indent(); + } } /** @@ -860,13 +837,19 @@ static void print_if_statement(const if_statement_t *statement) { print_string("if ("); print_expression(statement->condition); - print_string(") "); - print_statement(statement->true_statement); - - if (statement->false_statement != NULL) { - print_indent(); - print_string("else "); - print_statement(statement->false_statement); + print_char(')'); + print_inner_statement(statement->true_statement); + + statement_t const *const f = statement->false_statement; + if (f) { + print_after_inner_statement(statement->true_statement); + print_string("else"); + if (f->kind == STATEMENT_IF) { + print_char(' '); + print_if_statement(&f->ifs); + } else { + print_inner_statement(f); + } } } @@ -877,10 +860,15 @@ static void print_if_statement(const if_statement_t *statement) */ static void print_switch_statement(const switch_statement_t *statement) { + int const old_case_indent = case_indent; + case_indent = indent; + print_string("switch ("); print_expression(statement->expression); - print_string(") "); - print_statement(statement->body); + print_char(')'); + print_inner_statement(statement->body); + + case_indent = old_case_indent; } /** @@ -901,21 +889,14 @@ static void print_case_label(const case_label_statement_t *statement) } print_string(":\n"); } - ++indent; - if (statement->statement != NULL) { - if (statement->statement->base.kind == STATEMENT_CASE_LABEL) { - --indent; - } - print_indent(); - print_statement(statement->statement); - } + print_indented_statement(statement->statement); } static void print_typedef(const entity_t *entity) { print_string("typedef "); print_type_ext(entity->typedefe.type, entity->base.symbol, NULL); - print_string(";"); + print_char(';'); } /** @@ -944,7 +925,7 @@ static void print_declaration_statement( bool first = true; entity_t *entity = statement->declarations_begin; if (entity == NULL) { - print_string("/* empty declaration statement */\n"); + print_string("/* empty declaration statement */"); return; } @@ -956,29 +937,16 @@ static void print_declaration_statement( continue; if (!first) { + print_char('\n'); print_indent(); } else { first = false; } print_entity(entity); - print_string("\n"); } } -/** - * Print a while statement. - * - * @param statement the statement - */ -static void print_while_statement(const while_statement_t *statement) -{ - print_string("while ("); - print_expression(statement->condition); - print_string(") "); - print_statement(statement->body); -} - /** * Print a do-while statement. * @@ -986,12 +954,12 @@ static void print_while_statement(const while_statement_t *statement) */ static void print_do_while_statement(const do_while_statement_t *statement) { - print_string("do "); - print_statement(statement->body); - print_indent(); + print_string("do"); + print_inner_statement(statement->body); + print_after_inner_statement(statement->body); print_string("while ("); print_expression(statement->condition); - print_string(");\n"); + print_string(");"); } /** @@ -1001,30 +969,35 @@ static void print_do_while_statement(const do_while_statement_t *statement) */ static void print_for_statement(const for_statement_t *statement) { - print_string("for ("); - if (statement->initialisation != NULL) { - print_expression(statement->initialisation); - print_string(";"); - } else { - entity_t const *entity = statement->scope.entities; - for (; entity != NULL; entity = entity->base.next) { - if (is_generated_entity(entity)) - continue; - /* FIXME display of multiple declarations is wrong */ - print_declaration(entity); + if (statement->initialisation || statement->scope.entities || !statement->condition || statement->step) { + print_string("for ("); + if (statement->initialisation != NULL) { + print_expression(statement->initialisation); + print_char(';'); + } else { + entity_t const *entity = statement->scope.entities; + for (; entity != NULL; entity = entity->base.next) { + if (is_generated_entity(entity)) + continue; + /* FIXME display of multiple declarations is wrong */ + print_declaration(entity); + } } - } - if (statement->condition != NULL) { - print_string(" "); + if (statement->condition != NULL) { + print_char(' '); + print_expression(statement->condition); + } + print_char(';'); + if (statement->step != NULL) { + print_char(' '); + print_expression(statement->step); + } + } else { + print_string("while ("); print_expression(statement->condition); } - print_string(";"); - if (statement->step != NULL) { - print_string(" "); - print_expression(statement->step); - } - print_string(") "); - print_statement(statement->body); + print_char(')'); + print_inner_statement(statement->body); } /** @@ -1042,10 +1015,10 @@ static void print_asm_arguments(asm_argument_t *arguments) if (argument->symbol) { print_format("[%s] ", argument->symbol->string); } - print_quoted_string(&argument->constraints, '"', 1); + print_quoted_string(&argument->constraints, '"'); print_string(" ("); print_expression(argument->expression); - print_string(")"); + print_char(')'); } } @@ -1061,7 +1034,7 @@ static void print_asm_clobbers(asm_clobber_t *clobbers) if (clobber != clobbers) print_string(", "); - print_quoted_string(&clobber->clobber, '"', 1); + print_quoted_string(&clobber->clobber, '"'); } } @@ -1076,8 +1049,8 @@ static void print_asm_statement(const asm_statement_t *statement) if (statement->is_volatile) { print_string("volatile "); } - print_string("("); - print_quoted_string(&statement->asm_text, '"', 1); + print_char('('); + print_quoted_string(&statement->asm_text, '"'); if (statement->outputs == NULL && statement->inputs == NULL && statement->clobbers == NULL) @@ -1097,7 +1070,7 @@ static void print_asm_statement(const asm_statement_t *statement) print_asm_clobbers(statement->clobbers); end_of_print_asm_statement: - print_string(");\n"); + print_string(");"); } /** @@ -1107,17 +1080,17 @@ end_of_print_asm_statement: */ static void print_ms_try_statement(const ms_try_statement_t *statement) { - print_string("__try "); - print_statement(statement->try_statement); - print_indent(); + print_string("__try"); + print_inner_statement(statement->try_statement); + print_after_inner_statement(statement->try_statement); if (statement->except_expression != NULL) { print_string("__except("); print_expression(statement->except_expression); - print_string(") "); + print_char(')'); } else { - print_string("__finally "); + print_string("__finally"); } - print_statement(statement->final_statement); + print_inner_statement(statement->final_statement); } /** @@ -1128,7 +1101,7 @@ static void print_ms_try_statement(const ms_try_statement_t *statement) static void print_leave_statement(const leave_statement_t *statement) { (void)statement; - print_string("__leave;\n"); + print_string("__leave;"); } /** @@ -1136,66 +1109,28 @@ static void print_leave_statement(const leave_statement_t *statement) * * @param statement the statement */ -void print_statement(const statement_t *statement) -{ - switch (statement->kind) { - case STATEMENT_EMPTY: - print_string(";\n"); - break; - case STATEMENT_COMPOUND: - print_compound_statement(&statement->compound); - break; - case STATEMENT_RETURN: - print_return_statement(&statement->returns); - break; - case STATEMENT_EXPRESSION: - print_expression_statement(&statement->expression); - break; - case STATEMENT_LABEL: - print_label_statement(&statement->label); - break; - case STATEMENT_GOTO: - print_goto_statement(&statement->gotos); - break; - case STATEMENT_CONTINUE: - print_string("continue;\n"); - break; - case STATEMENT_BREAK: - print_string("break;\n"); - break; - case STATEMENT_IF: - print_if_statement(&statement->ifs); - break; - case STATEMENT_SWITCH: - print_switch_statement(&statement->switchs); - break; - case STATEMENT_CASE_LABEL: - print_case_label(&statement->case_label); - break; - case STATEMENT_DECLARATION: - print_declaration_statement(&statement->declaration); - break; - case STATEMENT_WHILE: - print_while_statement(&statement->whiles); - break; - case STATEMENT_DO_WHILE: - print_do_while_statement(&statement->do_while); - break; - case STATEMENT_FOR: - print_for_statement(&statement->fors); - break; - case STATEMENT_ASM: - print_asm_statement(&statement->asms); - break; - case STATEMENT_MS_TRY: - print_ms_try_statement(&statement->ms_try); - break; - case STATEMENT_LEAVE: - print_leave_statement(&statement->leave); - break; - case STATEMENT_INVALID: - print_string("$invalid statement$\n"); - break; +void print_statement(statement_t const *const stmt) +{ + switch (stmt->kind) { + case STATEMENT_ASM: print_asm_statement( &stmt->asms); break; + case STATEMENT_BREAK: print_string("break;"); break; + case STATEMENT_CASE_LABEL: print_case_label( &stmt->case_label); break; + case STATEMENT_COMPOUND: print_compound_statement( &stmt->compound); break; + case STATEMENT_COMPUTED_GOTO: print_computed_goto_statement(&stmt->computed_goto); break; + case STATEMENT_CONTINUE: print_string("continue;"); break; + case STATEMENT_DECLARATION: print_declaration_statement( &stmt->declaration); break; + case STATEMENT_DO_WHILE: print_do_while_statement( &stmt->do_while); break; + case STATEMENT_EMPTY: print_char(';'); break; + case STATEMENT_ERROR: print_string("$error statement$"); break; + case STATEMENT_EXPRESSION: print_expression_statement( &stmt->expression); break; + case STATEMENT_FOR: print_for_statement( &stmt->fors); break; + case STATEMENT_GOTO: print_goto_statement( &stmt->gotos); break; + case STATEMENT_IF: print_if_statement( &stmt->ifs); break; + case STATEMENT_LABEL: print_label_statement( &stmt->label); break; + case STATEMENT_LEAVE: print_leave_statement( &stmt->leave); break; + case STATEMENT_MS_TRY: print_ms_try_statement( &stmt->ms_try); break; + case STATEMENT_RETURN: print_return_statement( &stmt->returns); break; + case STATEMENT_SWITCH: print_switch_statement( &stmt->switchs); break; } } @@ -1230,13 +1165,12 @@ void print_initializer(const initializer_t *initializer) } switch (initializer->kind) { - case INITIALIZER_VALUE: { - const initializer_value_t *value = &initializer->value; - print_assignment_expression(value->value); + case INITIALIZER_STRING: + case INITIALIZER_VALUE: + print_assignment_expression(initializer->value.value); return; - } + case INITIALIZER_LIST: { - assert(initializer->kind == INITIALIZER_LIST); print_string("{ "); const initializer_list_t *list = &initializer->list; @@ -1251,12 +1185,7 @@ void print_initializer(const initializer_t *initializer) print_string(" }"); return; } - case INITIALIZER_STRING: - print_quoted_string(&initializer->string.string, '"', 1); - return; - case INITIALIZER_WIDE_STRING: - print_quoted_string(&initializer->string.string, '"', 1); - return; + case INITIALIZER_DESIGNATOR: print_designator(initializer->designator.designator); print_string(" = "); @@ -1303,7 +1232,7 @@ static void print_ms_modifiers(const declaration_t *declaration) } if (variable->put_property_sym != NULL) print_format("%sput=%s", comma, variable->put_property_sym->string); - print_string(")"); + print_char(')'); } } } @@ -1366,7 +1295,7 @@ static void print_scope(const scope_t *scope) for ( ; entity != NULL; entity = entity->base.next) { print_indent(); print_entity(entity); - print_string("\n"); + print_char('\n'); } } @@ -1375,7 +1304,7 @@ static void print_namespace(const namespace_t *namespace) print_string("namespace "); if (namespace->base.symbol != NULL) { print_string(namespace->base.symbol->string); - print_string(" "); + print_char(' '); } print_string("{\n"); @@ -1415,17 +1344,17 @@ void print_declaration(const entity_t *entity) print_type_ext(entity->declaration.type, entity->base.symbol, &entity->function.parameters); - if (entity->function.statement != NULL) { - print_string("\n"); - print_indent(); - print_statement(entity->function.statement); + if (entity->function.body != NULL) { + print_char('\n'); + print_indented_statement(entity->function.body); + print_char('\n'); return; } break; case ENTITY_VARIABLE: if (entity->variable.thread_local) - print_string("__thread "); + print_string(c_mode & _C11 ? "_Thread_local " : "__thread "); print_type_ext(declaration->type, declaration->base.symbol, NULL); if (entity->variable.initializer != NULL) { print_string(" = "); @@ -1433,11 +1362,18 @@ void print_declaration(const entity_t *entity) } break; + case ENTITY_COMPOUND_MEMBER: + print_type_ext(declaration->type, declaration->base.symbol, NULL); + if (entity->compound_member.bitfield) { + print_format(" : %u", entity->compound_member.bit_size); + } + break; + default: print_type_ext(declaration->type, declaration->base.symbol, NULL); break; } - print_string(";"); + print_char(';'); } /** @@ -1478,28 +1414,23 @@ void print_entity(const entity_t *entity) return; case ENTITY_STRUCT: print_string("struct "); - print_string(entity->base.symbol->string); - if (entity->structe.complete) { - print_string(" "); - print_compound_definition(&entity->structe); - } - print_string(";"); - return; + goto print_compound; case ENTITY_UNION: print_string("union "); +print_compound: print_string(entity->base.symbol->string); - if (entity->unione.complete) { - print_string(" "); - print_compound_definition(&entity->unione); + if (entity->compound.complete) { + print_char(' '); + print_compound_definition(&entity->compound); } - print_string(";"); + print_char(';'); return; case ENTITY_ENUM: print_string("enum "); print_string(entity->base.symbol->string); - print_string(" "); + print_char(' '); print_enum_definition(&entity->enume); - print_string(";"); + print_char(';'); return; case ENTITY_NAMESPACE: print_namespace(&entity->namespacee); @@ -1507,13 +1438,11 @@ void print_entity(const entity_t *entity) case ENTITY_LOCAL_LABEL: print_string("__label__ "); print_string(entity->base.symbol->string); - print_string(";"); + print_char(';'); return; case ENTITY_LABEL: case ENTITY_ENUM_VALUE: panic("print_entity used on unexpected entity type"); - case ENTITY_INVALID: - break; } panic("Invalid entity type encountered"); } @@ -1537,7 +1466,7 @@ void print_ast(const translation_unit_t *unit) print_indent(); print_entity(entity); - print_string("\n"); + print_char('\n'); } } @@ -1545,12 +1474,11 @@ expression_classification_t is_constant_initializer(const initializer_t *initial { switch (initializer->kind) { case INITIALIZER_STRING: - case INITIALIZER_WIDE_STRING: case INITIALIZER_DESIGNATOR: return EXPR_CLASS_CONSTANT; case INITIALIZER_VALUE: - return is_constant_expression(initializer->value.value); + return is_linker_constant(initializer->value.value); case INITIALIZER_LIST: { expression_classification_t all = EXPR_CLASS_CONSTANT; @@ -1567,50 +1495,59 @@ expression_classification_t is_constant_initializer(const initializer_t *initial panic("invalid initializer kind found"); } -static expression_classification_t is_object_with_linker_constant_address(const expression_t *expression) +/** + * Checks if an expression references an object with a constant/known location + * to the linker. Example: + * - "x", "*&x" with x being a global variable. The value of x need not be + * constant but the address of x is. + * - "a.b.c" when a has a constant/known location to the linker + */ +static expression_classification_t is_object_with_linker_constant_address( + const expression_t *expression) { switch (expression->kind) { case EXPR_UNARY_DEREFERENCE: - return is_address_constant(expression->unary.value); + return is_linker_constant(expression->unary.value); case EXPR_SELECT: { type_t *base_type = skip_typeref(expression->select.compound->base.type); if (is_type_pointer(base_type)) { /* it's a -> */ - return is_address_constant(expression->select.compound); + return is_linker_constant(expression->select.compound); } else { return is_object_with_linker_constant_address(expression->select.compound); } } case EXPR_ARRAY_ACCESS: { - expression_classification_t const ref = is_address_constant(expression->array_access.array_ref); + expression_classification_t const ref = is_linker_constant(expression->array_access.array_ref); expression_classification_t const idx = is_constant_expression(expression->array_access.index); return ref < idx ? ref : idx; } case EXPR_REFERENCE: { entity_t *entity = expression->reference.entity; - if (is_declaration(entity)) { - switch ((storage_class_tag_t)entity->declaration.storage_class) { - case STORAGE_CLASS_NONE: - case STORAGE_CLASS_EXTERN: - case STORAGE_CLASS_STATIC: - return - entity->kind != ENTITY_VARIABLE || - !entity->variable.thread_local ? EXPR_CLASS_CONSTANT : - EXPR_CLASS_VARIABLE; - - case STORAGE_CLASS_REGISTER: - case STORAGE_CLASS_TYPEDEF: - case STORAGE_CLASS_AUTO: - break; - } + if (!is_declaration(entity)) + return EXPR_CLASS_VARIABLE; + + switch ((storage_class_tag_t)entity->declaration.storage_class) { + case STORAGE_CLASS_NONE: + case STORAGE_CLASS_EXTERN: + case STORAGE_CLASS_STATIC: + return + entity->kind != ENTITY_VARIABLE || + !entity->variable.thread_local ? EXPR_CLASS_CONSTANT : + EXPR_CLASS_VARIABLE; + + case STORAGE_CLASS_REGISTER: + case STORAGE_CLASS_TYPEDEF: + case STORAGE_CLASS_AUTO: + break; } return EXPR_CLASS_VARIABLE; } - case EXPR_INVALID: + case EXPR_ERROR: return EXPR_CLASS_ERROR; default: @@ -1618,15 +1555,17 @@ static expression_classification_t is_object_with_linker_constant_address(const } } -expression_classification_t is_address_constant(const expression_t *expression) +expression_classification_t is_linker_constant(const expression_t *expression) { switch (expression->kind) { case EXPR_STRING_LITERAL: - case EXPR_WIDE_STRING_LITERAL: case EXPR_FUNCNAME: case EXPR_LABEL_ADDRESS: return EXPR_CLASS_CONSTANT; + case EXPR_COMPOUND_LITERAL: + return is_constant_initializer(expression->compound_literal.initializer); + case EXPR_UNARY_TAKE_ADDRESS: return is_object_with_linker_constant_address(expression->unary.value); @@ -1635,7 +1574,7 @@ expression_classification_t is_address_constant(const expression_t *expression) = revert_automatic_type_conversion(expression->unary.value); /* dereferencing a function is a NOP */ if (is_type_function(real_type)) { - return is_address_constant(expression->unary.value); + return is_linker_constant(expression->unary.value); } /* FALLTHROUGH */ } @@ -1645,13 +1584,11 @@ expression_classification_t is_address_constant(const expression_t *expression) if (!is_type_pointer(dest) && ( dest->kind != TYPE_ATOMIC || !(get_atomic_type_flags(dest->atomic.akind) & ATOMIC_TYPE_FLAG_INTEGER) || - get_atomic_type_size(dest->atomic.akind) < get_atomic_type_size(get_intptr_kind()) + get_atomic_type_size(dest->atomic.akind) < get_type_size(type_void_ptr) )) - return EXPR_CLASS_VARIABLE; + return is_constant_expression(expression); - expression_classification_t const expr = is_constant_expression(expression->unary.value); - expression_classification_t const addr = is_address_constant(expression->unary.value); - return expr > addr ? expr : addr; + return is_linker_constant(expression->unary.value); } case EXPR_BINARY_ADD: @@ -1662,17 +1599,17 @@ expression_classification_t is_address_constant(const expression_t *expression) type_t *const rtype = skip_typeref(right->base.type); if (is_type_pointer(ltype)) { - expression_classification_t const l = is_address_constant(left); + expression_classification_t const l = is_linker_constant(left); expression_classification_t const r = is_constant_expression(right); return l < r ? l : r; } else if (is_type_pointer(rtype)) { expression_classification_t const l = is_constant_expression(left); - expression_classification_t const r = is_address_constant(right); + expression_classification_t const r = is_linker_constant(right); return l < r ? l : r; } else if (!is_type_valid(ltype) || !is_type_valid(rtype)) { return EXPR_CLASS_ERROR; } else { - return EXPR_CLASS_VARIABLE; + return is_constant_expression(expression); } } @@ -1698,9 +1635,7 @@ expression_classification_t is_address_constant(const expression_t *expression) skip_typeref(revert_automatic_type_conversion(expression)); if (!is_type_array(type)) return EXPR_CLASS_VARIABLE; - expression_classification_t const ref = is_address_constant(expression->array_access.array_ref); - expression_classification_t const idx = is_constant_expression(expression->array_access.index); - return ref < idx ? ref : idx; + return is_linker_constant(expression->array_access.array_ref); } case EXPR_CONDITIONAL: { @@ -1711,17 +1646,33 @@ expression_classification_t is_address_constant(const expression_t *expression) if (fold_constant_to_bool(c)) { expression_t const *const t = expression->conditional.true_expression; - return is_address_constant(t != NULL ? t : c); + return is_linker_constant(t != NULL ? t : c); } else { - return is_address_constant(expression->conditional.false_expression); + return is_linker_constant(expression->conditional.false_expression); } } - case EXPR_INVALID: - return EXPR_CLASS_ERROR; + case EXPR_SELECT: { + entity_t *entity = expression->select.compound_entry; + if (!is_declaration(entity)) + return EXPR_CLASS_VARIABLE; + type_t *type = skip_typeref(entity->declaration.type); + if (is_type_array(type)) { + /* arrays automatically convert to their address */ + expression_t *compound = expression->select.compound; + type_t *base_type = skip_typeref(compound->base.type); + if (is_type_pointer(base_type)) { + /* it's a -> */ + return is_linker_constant(compound); + } else { + return is_object_with_linker_constant_address(compound); + } + } + return EXPR_CLASS_VARIABLE; + } default: - return EXPR_CLASS_VARIABLE; + return is_constant_expression(expression); } } @@ -1739,15 +1690,8 @@ static expression_classification_t is_builtin_const_call(const expression_t *exp return EXPR_CLASS_VARIABLE; switch (ref->entity->function.btk) { - case bk_gnu_builtin_huge_val: - case bk_gnu_builtin_huge_valf: - case bk_gnu_builtin_huge_vall: - case bk_gnu_builtin_inf: - case bk_gnu_builtin_inff: - case bk_gnu_builtin_infl: - case bk_gnu_builtin_nan: - case bk_gnu_builtin_nanf: - case bk_gnu_builtin_nanl: + case BUILTIN_INF: + case BUILTIN_NAN: return EXPR_CLASS_CONSTANT; default: return EXPR_CLASS_VARIABLE; @@ -1797,7 +1741,7 @@ static expression_classification_t is_object_with_constant_address(const express case EXPR_UNARY_DEREFERENCE: return is_constant_pointer(expression->unary.value); - case EXPR_INVALID: + case EXPR_ERROR: return EXPR_CLASS_ERROR; default: @@ -1808,24 +1752,48 @@ static expression_classification_t is_object_with_constant_address(const express expression_classification_t is_constant_expression(const expression_t *expression) { switch (expression->kind) { - EXPR_LITERAL_CASES - case EXPR_CLASSIFY_TYPE: - case EXPR_OFFSETOF: - case EXPR_ALIGNOF: - case EXPR_BUILTIN_CONSTANT_P: + case EXPR_LITERAL_CHARACTER: case EXPR_BUILTIN_TYPES_COMPATIBLE_P: - case EXPR_REFERENCE_ENUM_VALUE: + case EXPR_ENUM_CONSTANT: + case EXPR_LITERAL_BOOLEAN: + case EXPR_LITERAL_MS_NOOP: return EXPR_CLASS_CONSTANT; - case EXPR_SIZEOF: { - type_t *const type = skip_typeref(expression->typeprop.type); - return - !is_type_array(type) || !type->array.is_vla ? EXPR_CLASS_CONSTANT : - EXPR_CLASS_VARIABLE; + { + type_t *type; + case EXPR_ALIGNOF: + type = skip_typeref(expression->typeprop.type); + goto check_type; + + case EXPR_CLASSIFY_TYPE: + type = skip_typeref(expression->classify_type.type_expression->base.type); + goto check_type; + + case EXPR_LITERAL_INTEGER: + case EXPR_LITERAL_FLOATINGPOINT: + type = skip_typeref(expression->base.type); + goto check_type; + + case EXPR_OFFSETOF: + type = skip_typeref(expression->offsetofe.type); + goto check_type; + + case EXPR_SIZEOF: + type = skip_typeref(expression->typeprop.type); + if (is_type_array(type) && type->array.is_vla) + return EXPR_CLASS_VARIABLE; + goto check_type; + +check_type: + return is_type_valid(type) ? EXPR_CLASS_CONSTANT : EXPR_CLASS_ERROR; + } + + case EXPR_BUILTIN_CONSTANT_P: { + expression_classification_t const c = is_constant_expression(expression->builtin_constant.value); + return c != EXPR_CLASS_ERROR ? EXPR_CLASS_CONSTANT : EXPR_CLASS_ERROR; } case EXPR_STRING_LITERAL: - case EXPR_WIDE_STRING_LITERAL: case EXPR_FUNCNAME: case EXPR_LABEL_ADDRESS: case EXPR_SELECT: @@ -1874,8 +1842,7 @@ expression_classification_t is_constant_expression(const expression_t *expressio case EXPR_UNARY_NOT: return is_constant_expression(expression->unary.value); - case EXPR_UNARY_CAST: - case EXPR_UNARY_CAST_IMPLICIT: { + case EXPR_UNARY_CAST: { type_t *const type = skip_typeref(expression->base.type); if (is_type_scalar(type)) return is_constant_expression(expression->unary.value); @@ -1916,7 +1883,7 @@ expression_classification_t is_constant_expression(const expression_t *expressio expression_classification_t const lclass = is_constant_expression(left); if (lclass != EXPR_CLASS_CONSTANT) return lclass; - if (fold_constant_to_bool(left) == false) + if (!fold_constant_to_bool(left)) return EXPR_CLASS_CONSTANT; return is_constant_expression(expression->binary.right); } @@ -1926,7 +1893,7 @@ expression_classification_t is_constant_expression(const expression_t *expressio expression_classification_t const lclass = is_constant_expression(left); if (lclass != EXPR_CLASS_CONSTANT) return lclass; - if (fold_constant_to_bool(left) == true) + if (fold_constant_to_bool(left)) return EXPR_CLASS_CONSTANT; return is_constant_expression(expression->binary.right); } @@ -1940,7 +1907,7 @@ expression_classification_t is_constant_expression(const expression_t *expressio if (cclass != EXPR_CLASS_CONSTANT) return cclass; - if (fold_constant_to_bool(condition) == true) { + if (fold_constant_to_bool(condition)) { expression_t const *const t = expression->conditional.true_expression; return t == NULL ? EXPR_CLASS_CONSTANT : is_constant_expression(t); } else { @@ -1948,39 +1915,18 @@ expression_classification_t is_constant_expression(const expression_t *expressio } } - case EXPR_INVALID: + case EXPR_ERROR: return EXPR_CLASS_ERROR; - - case EXPR_UNKNOWN: - break; } panic("invalid expression found (is constant expression)"); } -/** - * Initialize the AST construction. - */ void init_ast(void) { obstack_init(&ast_obstack); } -/** - * Free the AST. - */ void exit_ast(void) { obstack_free(&ast_obstack, NULL); } - -/** - * Allocate an AST object of the given size. - * - * @param size the size of the object to allocate - * - * @return A new allocated object in the AST memeory space. - */ -void *(allocate_ast)(size_t size) -{ - return _allocate_ast(size); -}