convert.cc File Reference

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "target.h"
#include "tree.h"
#include "diagnostic-core.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "convert.h"
#include "langhooks.h"
#include "builtins.h"
#include "ubsan.h"
#include "stringpool.h"
#include "attribs.h"
#include "asan.h"
#include "selftest.h"

Include dependency graph for convert.cc:

Macros
#define	maybe_fold_build1_loc(FOLD_P, LOC, CODE, TYPE, EXPR)
#define	maybe_fold_build2_loc(FOLD_P, LOC, CODE, TYPE, EXPR1, EXPR2)
#define	CASE_MATHFN(FN)

Functions
static tree	convert_to_pointer_1 (tree type, tree expr, bool fold_p)
tree	preserve_any_location_wrapper (tree result, tree orig_expr)
tree	convert_to_pointer (tree type, tree expr)
tree	convert_to_pointer_maybe_fold (tree type, tree expr, bool dofold)
static tree	convert_to_real_1 (tree type, tree expr, bool fold_p)
tree	convert_to_real (tree type, tree expr)
tree	convert_to_real_maybe_fold (tree type, tree expr, bool dofold)
static tree	do_narrow (location_t loc, enum tree_code ex_form, tree type, tree arg0, tree arg1, tree expr, unsigned inprec, unsigned outprec, bool dofold)
static tree	convert_to_integer_1 (tree type, tree expr, bool dofold)
tree	convert_to_integer (tree type, tree expr)
tree	convert_to_integer_maybe_fold (tree type, tree expr, bool dofold)
static tree	convert_to_complex_1 (tree type, tree expr, bool fold_p)
tree	convert_to_complex (tree type, tree expr)
tree	convert_to_complex_maybe_fold (tree type, tree expr, bool dofold)
tree	convert_to_vector (tree type, tree expr)
tree	convert_to_fixed (tree type, tree expr)

Macro Definition Documentation

CASE_MATHFN

#define CASE_MATHFN

(

FN

)

Value:

case BUILT_IN_##FN: case BUILT_IN_##FN##L:

Referenced by convert_to_real_1().

maybe_fold_build1_loc

#define maybe_fold_build1_loc	(		FOLD_P,
			LOC,
			CODE,
			TYPE,
			EXPR )

Value:

  ((FOLD_P) ? fold_build1_loc (LOC, CODE, TYPE, EXPR)         \
   : build1_loc (LOC, CODE, TYPE, EXPR))

Utility routines for data type conversion for GCC.
   Copyright (C) 1987-2025 Free Software Foundation, Inc.

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/>.   

These routines are somewhat language-independent utility function
intended to be called by the language-specific convert () functions.   

Referenced by convert_to_complex_1(), convert_to_integer_1(), convert_to_pointer_1(), and convert_to_real_1().

maybe_fold_build2_loc

#define maybe_fold_build2_loc	(		FOLD_P,
			LOC,
			CODE,
			TYPE,
			EXPR1,
			EXPR2 )

Value:

  ((FOLD_P) ? fold_build2_loc (LOC, CODE, TYPE, EXPR1, EXPR2)         \
   : build2_loc (LOC, CODE, TYPE, EXPR1, EXPR2))

Referenced by convert_to_complex_1(), convert_to_integer_1(), and do_narrow().

Function Documentation

convert_to_complex()

tree convert_to_complex	(	tree	type,
		tree	expr )

A wrapper around convert_to_complex_1 that always folds the
expression.   

References convert_to_complex_1().

convert_to_complex_1()

static tree convert_to_complex_1 ( tree type, tree expr, bool fold_p )

static

Convert EXPR to the complex type TYPE in the usual ways.  If FOLD_P is
true, try to fold the expression.   

References build2(), build2_loc(), convert(), convert_to_complex_1(), error(), error_mark_node, error_operand_p(), EXPR_LOCATION, integer_zero_node, maybe_fold_build1_loc, maybe_fold_build2_loc, save_expr(), TREE_CODE, TREE_OPERAND, TREE_TYPE, and TYPE_MAIN_VARIANT.

Referenced by convert_to_complex(), convert_to_complex_1(), and convert_to_complex_maybe_fold().

convert_to_complex_maybe_fold()

tree convert_to_complex_maybe_fold	(	tree	type,
		tree	expr,
		bool	dofold )

A wrapper around convert_to_complex_1 that only folds the
expression if DOFOLD, or if it is CONSTANT_CLASS_OR_WRAPPER_P.   

References CONSTANT_CLASS_OR_WRAPPER_P, convert_to_complex_1(), and preserve_any_location_wrapper().

Referenced by convert_to_complex_nofold().

convert_to_fixed()

tree convert_to_fixed	(	tree	type,
		tree	expr )

Convert EXPR to some fixed-point type TYPE.

EXPR must be fixed-point, float, integer, or enumeral;
in other cases error is called.   

References ALL_SCALAR_ACCUM_MODE_P, build1(), build_fixed(), convert(), error(), error_mark_node, FCONST0, FCONST1, fold_build1, integer_onep(), integer_zerop(), TREE_CODE, TREE_TYPE, and TYPE_MODE.

convert_to_integer()

tree convert_to_integer	(	tree	type,
		tree	expr )

Convert EXPR to some integer (or enum) type TYPE.

EXPR must be pointer, integer, discrete (enum, char, or bool), float,
fixed-point or vector; in other cases error is called.

The result of this is always supposed to be a newly created tree node
not in use in any existing structure.   

References convert_to_integer_1().

convert_to_integer_1()

static tree convert_to_integer_1 ( tree type, tree expr, bool dofold )

static

Convert EXPR to some integer (or enum) type TYPE.

EXPR must be pointer, integer, discrete (enum, char, or bool), float,
fixed-point or vector; in other cases error is called.

If DOFOLD is TRUE, we try to simplify newly-created patterns by folding.

The result of this is always supposed to be a newly created tree node
not in use in any existing structure.   

References build1(), build2(), build2_loc(), build_call_expr(), build_int_cst(), builtin_mathfn_code(), CALL_EXPR_ARG, call_expr_nargs, CASE_CONVERT, CASE_FLT_FN, CASE_FLT_FN_FLOATN_NX, COMPLETE_TYPE_P, convert(), CONVERT_EXPR_P, convert_to_integer_1(), copy_node(), current_function_decl, do_narrow(), element_precision(), error(), error_mark_node, EXPR_LOCATION, fold_build1, fold_build3, fold_convert, function_c99_misc, gcc_fallthrough, GET_MODE_PRECISION(), GET_MODE_SIZE(), get_unwidened(), integer_all_onesp(), integer_type_node, integer_zerop(), long_integer_type_node, long_long_integer_type_node, mathfn_built_in(), maybe_fold_build1_loc, maybe_fold_build2_loc, NULL_TREE, POINTER_TYPE_P, sanitize_flags_p(), SANITIZE_FLOAT_CAST, SANITIZE_SI_OVERFLOW, save_expr(), SCALAR_FLOAT_TYPE_P, strip_float_extensions(), targetm, tcc_comparison, wi::to_widest(), TREE_CODE, TREE_CODE_CLASS, tree_int_cst_equal(), tree_int_cst_sgn(), TREE_OPERAND, TREE_OVERFLOW, TREE_SIDE_EFFECTS, tree_strip_any_location_wrapper(), TREE_TYPE, lang_hooks_for_types::type_for_mode, lang_hooks_for_types::type_for_size, type_has_mode_precision_p(), TYPE_MODE, TYPE_PRECISION, TYPE_SIZE, TYPE_UNSIGNED, lang_hooks::types, ubsan_instrument_float_cast(), unsigned_type_for(), and VOID_TYPE_P.

Referenced by convert_to_integer(), convert_to_integer_1(), and convert_to_integer_maybe_fold().

convert_to_integer_maybe_fold()

tree convert_to_integer_maybe_fold	(	tree	type,
		tree	expr,
		bool	dofold )

A wrapper around convert_to_complex_1 that only folds the
expression if DOFOLD, or if it is CONSTANT_CLASS_OR_WRAPPER_P.   

References CONSTANT_CLASS_OR_WRAPPER_P, convert_to_integer_1(), and preserve_any_location_wrapper().

Referenced by convert_to_integer_nofold().

convert_to_pointer()

tree convert_to_pointer	(	tree	type,
		tree	expr )

A wrapper around convert_to_pointer_1 that always folds the
expression.   

References convert_to_pointer_1().

Referenced by oacc_rewrite_var_decl().

convert_to_pointer_1()

static tree convert_to_pointer_1 ( tree type, tree expr, bool fold_p )

static

Convert EXPR to some pointer or reference type TYPE.
EXPR must be pointer, reference, integer, enumeral, or literal zero;
in other cases error is called.  If FOLD_P is true, try to fold the
expression.   

References error(), error_mark_node, EXPR_LOCATION, maybe_fold_build1_loc, TREE_CODE, TREE_TYPE, TYPE_ADDR_SPACE, lang_hooks_for_types::type_for_size, TYPE_PRECISION, and lang_hooks::types.

Referenced by convert_to_pointer(), and convert_to_pointer_maybe_fold().

convert_to_pointer_maybe_fold()

tree convert_to_pointer_maybe_fold	(	tree	type,
		tree	expr,
		bool	dofold )

A wrapper around convert_to_pointer_1 that only folds the
expression if DOFOLD, or if it is CONSTANT_CLASS_OR_WRAPPER_P.   

References CONSTANT_CLASS_OR_WRAPPER_P, convert_to_pointer_1(), and preserve_any_location_wrapper().

Referenced by convert_to_pointer_nofold().

convert_to_real()

tree convert_to_real	(	tree	type,
		tree	expr )

A wrapper around convert_to_real_1 that always folds the
expression.   

References convert_to_real_1().

convert_to_real_1()

static tree convert_to_real_1 ( tree type, tree expr, bool fold_p )

static

Convert EXPR to some floating-point type TYPE.

EXPR must be float, fixed-point, integer, or enumeral;
in other cases error is called.  If FOLD_P is true, try to fold
the expression.   

References build1(), build1_loc(), build2_loc(), build_call_expr(), builtin_mathfn_code(), CALL_EXPR_ARG, call_expr_nargs, CASE_MATHFN, convert(), convert_to_real_1(), DECIMAL_FLOAT_TYPE_P, double_type_node, element_precision(), error(), error_mark_node, EXPR_LOCATION, float_type_node, FLOAT_TYPE_P, gcc_fallthrough, mathfn_built_in(), maybe_fold_build1_loc, REAL_MODE_FORMAT, SCALAR_FLOAT_TYPE_P, strip_float_extensions(), TREE_CODE, TREE_OPERAND, TREE_TYPE, TYPE_MODE, and TYPE_PRECISION.

Referenced by convert_to_real(), convert_to_real_1(), and convert_to_real_maybe_fold().

convert_to_real_maybe_fold()

tree convert_to_real_maybe_fold	(	tree	type,
		tree	expr,
		bool	dofold )

A wrapper around convert_to_real_1 that only folds the
expression if DOFOLD, or if it is CONSTANT_CLASS_OR_WRAPPER_P.   

References CONSTANT_CLASS_OR_WRAPPER_P, convert_to_real_1(), and preserve_any_location_wrapper().

Referenced by convert_to_real_nofold().

convert_to_vector()

tree convert_to_vector	(	tree	type,
		tree	expr )

Convert EXPR to the vector type TYPE in the usual ways.   

References build1(), error(), error_mark_node, TREE_CODE, tree_int_cst_equal(), TREE_TYPE, and TYPE_SIZE.

do_narrow()

static tree do_narrow ( location_t loc, enum tree_code ex_form, tree type, tree arg0, tree arg1, tree expr, unsigned inprec, unsigned outprec, bool dofold )

static

Try to narrow EX_FORM ARG0 ARG1 in narrowed arg types producing a
result in TYPE.   

References convert(), INTEGRAL_TYPE_P, maybe_fold_build2_loc, NULL_TREE, sanitize_flags_p(), SANITIZE_SI_OVERFLOW, signed_type_for(), TREE_CODE, TREE_TYPE, lang_hooks_for_types::type_for_size, TYPE_OVERFLOW_WRAPS, TYPE_PRECISION, TYPE_UNSIGNED, lang_hooks::types, and unsigned_type_for().

Referenced by convert_to_integer_1().

preserve_any_location_wrapper()

tree preserve_any_location_wrapper	(	tree	result,
		tree	orig_expr )

Subroutine of the various convert_to_*_maybe_fold routines.

If a location wrapper has been folded to a constant (presumably of
a different type), re-wrap the new constant with a location wrapper.   

References CONSTANT_CLASS_P, EXPR_LOCATION, location_wrapper_p(), maybe_wrap_with_location(), and TREE_OPERAND.

Referenced by convert_to_complex_maybe_fold(), convert_to_integer_maybe_fold(), convert_to_pointer_maybe_fold(), and convert_to_real_maybe_fold().