/* Translation of constants
|
/* Translation of constants
|
Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
|
Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
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Foundation, Inc.
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Foundation, Inc.
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Contributed by Paul Brook
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Contributed by Paul Brook
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|
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This file is part of GCC.
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This file is part of GCC.
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|
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GCC is free software; you can redistribute it and/or modify it under
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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
|
the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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Software Foundation; either version 3, or (at your option) any later
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version.
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version.
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|
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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for more details.
|
|
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You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with GCC; see the file COPYING3. If not see
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along with GCC; see the file COPYING3. If not see
|
<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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|
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/* trans-const.c -- convert constant values */
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/* trans-const.c -- convert constant values */
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|
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#include "config.h"
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#include "config.h"
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#include "system.h"
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#include "system.h"
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#include "coretypes.h"
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#include "coretypes.h"
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#include "tree.h"
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#include "tree.h"
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#include "ggc.h"
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#include "ggc.h"
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#include "toplev.h"
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#include "toplev.h"
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#include "real.h"
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#include "real.h"
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#include "double-int.h"
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#include "double-int.h"
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#include "gfortran.h"
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#include "gfortran.h"
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#include "trans.h"
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#include "trans.h"
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#include "trans-const.h"
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#include "trans-const.h"
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#include "trans-types.h"
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#include "trans-types.h"
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#include "target-memory.h"
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#include "target-memory.h"
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|
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tree gfc_rank_cst[GFC_MAX_DIMENSIONS + 1];
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tree gfc_rank_cst[GFC_MAX_DIMENSIONS + 1];
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|
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/* Build a constant with given type from an int_cst. */
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/* Build a constant with given type from an int_cst. */
|
|
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tree
|
tree
|
gfc_build_const (tree type, tree intval)
|
gfc_build_const (tree type, tree intval)
|
{
|
{
|
tree val;
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tree val;
|
tree zero;
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tree zero;
|
|
|
switch (TREE_CODE (type))
|
switch (TREE_CODE (type))
|
{
|
{
|
case INTEGER_TYPE:
|
case INTEGER_TYPE:
|
val = convert (type, intval);
|
val = convert (type, intval);
|
break;
|
break;
|
|
|
case REAL_TYPE:
|
case REAL_TYPE:
|
val = build_real_from_int_cst (type, intval);
|
val = build_real_from_int_cst (type, intval);
|
break;
|
break;
|
|
|
case COMPLEX_TYPE:
|
case COMPLEX_TYPE:
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val = build_real_from_int_cst (TREE_TYPE (type), intval);
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val = build_real_from_int_cst (TREE_TYPE (type), intval);
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zero = build_real_from_int_cst (TREE_TYPE (type), integer_zero_node);
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zero = build_real_from_int_cst (TREE_TYPE (type), integer_zero_node);
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val = build_complex (type, val, zero);
|
val = build_complex (type, val, zero);
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break;
|
break;
|
|
|
default:
|
default:
|
gcc_unreachable ();
|
gcc_unreachable ();
|
}
|
}
|
return val;
|
return val;
|
}
|
}
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|
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/* Build a string constant with C char type. */
|
/* Build a string constant with C char type. */
|
|
|
tree
|
tree
|
gfc_build_string_const (int length, const char *s)
|
gfc_build_string_const (int length, const char *s)
|
{
|
{
|
tree str;
|
tree str;
|
tree len;
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tree len;
|
|
|
str = build_string (length, s);
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str = build_string (length, s);
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len = build_int_cst (NULL_TREE, length);
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len = build_int_cst (NULL_TREE, length);
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TREE_TYPE (str) =
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TREE_TYPE (str) =
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build_array_type (gfc_character1_type_node,
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build_array_type (gfc_character1_type_node,
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build_range_type (gfc_charlen_type_node,
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build_range_type (gfc_charlen_type_node,
|
integer_one_node, len));
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integer_one_node, len));
|
return str;
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return str;
|
}
|
}
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|
|
|
|
/* Build a string constant with a type given by its kind; take care of
|
/* Build a string constant with a type given by its kind; take care of
|
non-default character kinds. */
|
non-default character kinds. */
|
|
|
tree
|
tree
|
gfc_build_wide_string_const (int kind, int length, const gfc_char_t *string)
|
gfc_build_wide_string_const (int kind, int length, const gfc_char_t *string)
|
{
|
{
|
int i;
|
int i;
|
tree str, len;
|
tree str, len;
|
size_t size;
|
size_t size;
|
char *s;
|
char *s;
|
|
|
i = gfc_validate_kind (BT_CHARACTER, kind, false);
|
i = gfc_validate_kind (BT_CHARACTER, kind, false);
|
size = length * gfc_character_kinds[i].bit_size / 8;
|
size = length * gfc_character_kinds[i].bit_size / 8;
|
|
|
s = XCNEWVAR (char, size);
|
s = XCNEWVAR (char, size);
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gfc_encode_character (kind, length, string, (unsigned char *) s, size);
|
gfc_encode_character (kind, length, string, (unsigned char *) s, size);
|
|
|
str = build_string (size, s);
|
str = build_string (size, s);
|
gfc_free (s);
|
gfc_free (s);
|
|
|
len = build_int_cst (NULL_TREE, length);
|
len = build_int_cst (NULL_TREE, length);
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TREE_TYPE (str) =
|
TREE_TYPE (str) =
|
build_array_type (gfc_get_char_type (kind),
|
build_array_type (gfc_get_char_type (kind),
|
build_range_type (gfc_charlen_type_node,
|
build_range_type (gfc_charlen_type_node,
|
integer_one_node, len));
|
integer_one_node, len));
|
return str;
|
return str;
|
}
|
}
|
|
|
|
|
/* Build a Fortran character constant from a zero-terminated string.
|
/* Build a Fortran character constant from a zero-terminated string.
|
There a two version of this function, one that translates the string
|
There a two version of this function, one that translates the string
|
and one that doesn't. */
|
and one that doesn't. */
|
tree
|
tree
|
gfc_build_cstring_const (const char *string)
|
gfc_build_cstring_const (const char *string)
|
{
|
{
|
return gfc_build_string_const (strlen (string) + 1, string);
|
return gfc_build_string_const (strlen (string) + 1, string);
|
}
|
}
|
|
|
tree
|
tree
|
gfc_build_localized_cstring_const (const char *msgid)
|
gfc_build_localized_cstring_const (const char *msgid)
|
{
|
{
|
const char *localized = _(msgid);
|
const char *localized = _(msgid);
|
return gfc_build_string_const (strlen (localized) + 1, localized);
|
return gfc_build_string_const (strlen (localized) + 1, localized);
|
}
|
}
|
|
|
|
|
/* Return a string constant with the given length. Used for static
|
/* Return a string constant with the given length. Used for static
|
initializers. The constant will be padded or truncated to match
|
initializers. The constant will be padded or truncated to match
|
length. */
|
length. */
|
|
|
tree
|
tree
|
gfc_conv_string_init (tree length, gfc_expr * expr)
|
gfc_conv_string_init (tree length, gfc_expr * expr)
|
{
|
{
|
gfc_char_t *s;
|
gfc_char_t *s;
|
HOST_WIDE_INT len;
|
HOST_WIDE_INT len;
|
int slen;
|
int slen;
|
tree str;
|
tree str;
|
bool free_s = false;
|
bool free_s = false;
|
|
|
gcc_assert (expr->expr_type == EXPR_CONSTANT);
|
gcc_assert (expr->expr_type == EXPR_CONSTANT);
|
gcc_assert (expr->ts.type == BT_CHARACTER);
|
gcc_assert (expr->ts.type == BT_CHARACTER);
|
gcc_assert (INTEGER_CST_P (length));
|
gcc_assert (INTEGER_CST_P (length));
|
gcc_assert (TREE_INT_CST_HIGH (length) == 0);
|
gcc_assert (TREE_INT_CST_HIGH (length) == 0);
|
|
|
len = TREE_INT_CST_LOW (length);
|
len = TREE_INT_CST_LOW (length);
|
slen = expr->value.character.length;
|
slen = expr->value.character.length;
|
|
|
if (len > slen)
|
if (len > slen)
|
{
|
{
|
s = gfc_get_wide_string (len);
|
s = gfc_get_wide_string (len);
|
memcpy (s, expr->value.character.string, slen * sizeof (gfc_char_t));
|
memcpy (s, expr->value.character.string, slen * sizeof (gfc_char_t));
|
gfc_wide_memset (&s[slen], ' ', len - slen);
|
gfc_wide_memset (&s[slen], ' ', len - slen);
|
free_s = true;
|
free_s = true;
|
}
|
}
|
else
|
else
|
s = expr->value.character.string;
|
s = expr->value.character.string;
|
|
|
str = gfc_build_wide_string_const (expr->ts.kind, len, s);
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str = gfc_build_wide_string_const (expr->ts.kind, len, s);
|
|
|
if (free_s)
|
if (free_s)
|
gfc_free (s);
|
gfc_free (s);
|
|
|
return str;
|
return str;
|
}
|
}
|
|
|
|
|
/* Create a tree node for the string length if it is constant. */
|
/* Create a tree node for the string length if it is constant. */
|
|
|
void
|
void
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gfc_conv_const_charlen (gfc_charlen * cl)
|
gfc_conv_const_charlen (gfc_charlen * cl)
|
{
|
{
|
if (!cl || cl->backend_decl)
|
if (!cl || cl->backend_decl)
|
return;
|
return;
|
|
|
if (cl->length && cl->length->expr_type == EXPR_CONSTANT)
|
if (cl->length && cl->length->expr_type == EXPR_CONSTANT)
|
{
|
{
|
cl->backend_decl = gfc_conv_mpz_to_tree (cl->length->value.integer,
|
cl->backend_decl = gfc_conv_mpz_to_tree (cl->length->value.integer,
|
cl->length->ts.kind);
|
cl->length->ts.kind);
|
cl->backend_decl = fold_convert (gfc_charlen_type_node,
|
cl->backend_decl = fold_convert (gfc_charlen_type_node,
|
cl->backend_decl);
|
cl->backend_decl);
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
gfc_init_constants (void)
|
gfc_init_constants (void)
|
{
|
{
|
int n;
|
int n;
|
|
|
for (n = 0; n <= GFC_MAX_DIMENSIONS; n++)
|
for (n = 0; n <= GFC_MAX_DIMENSIONS; n++)
|
gfc_rank_cst[n] = build_int_cst (gfc_array_index_type, n);
|
gfc_rank_cst[n] = build_int_cst (gfc_array_index_type, n);
|
}
|
}
|
|
|
/* Converts a GMP integer into a backend tree node. */
|
/* Converts a GMP integer into a backend tree node. */
|
|
|
tree
|
tree
|
gfc_conv_mpz_to_tree (mpz_t i, int kind)
|
gfc_conv_mpz_to_tree (mpz_t i, int kind)
|
{
|
{
|
double_int val = mpz_get_double_int (gfc_get_int_type (kind), i, true);
|
double_int val = mpz_get_double_int (gfc_get_int_type (kind), i, true);
|
return double_int_to_tree (gfc_get_int_type (kind), val);
|
return double_int_to_tree (gfc_get_int_type (kind), val);
|
}
|
}
|
|
|
/* Converts a backend tree into a GMP integer. */
|
/* Converts a backend tree into a GMP integer. */
|
|
|
void
|
void
|
gfc_conv_tree_to_mpz (mpz_t i, tree source)
|
gfc_conv_tree_to_mpz (mpz_t i, tree source)
|
{
|
{
|
double_int val = tree_to_double_int (source);
|
double_int val = tree_to_double_int (source);
|
mpz_set_double_int (i, val, TYPE_UNSIGNED (TREE_TYPE (source)));
|
mpz_set_double_int (i, val, TYPE_UNSIGNED (TREE_TYPE (source)));
|
}
|
}
|
|
|
/* Converts a real constant into backend form. */
|
/* Converts a real constant into backend form. */
|
|
|
tree
|
tree
|
gfc_conv_mpfr_to_tree (mpfr_t f, int kind, int is_snan)
|
gfc_conv_mpfr_to_tree (mpfr_t f, int kind, int is_snan)
|
{
|
{
|
tree type;
|
tree type;
|
int n;
|
int n;
|
REAL_VALUE_TYPE real;
|
REAL_VALUE_TYPE real;
|
|
|
n = gfc_validate_kind (BT_REAL, kind, false);
|
n = gfc_validate_kind (BT_REAL, kind, false);
|
gcc_assert (gfc_real_kinds[n].radix == 2);
|
gcc_assert (gfc_real_kinds[n].radix == 2);
|
|
|
type = gfc_get_real_type (kind);
|
type = gfc_get_real_type (kind);
|
if (mpfr_nan_p (f) && is_snan)
|
if (mpfr_nan_p (f) && is_snan)
|
real_from_string (&real, "SNaN");
|
real_from_string (&real, "SNaN");
|
else
|
else
|
real_from_mpfr (&real, f, type, GFC_RND_MODE);
|
real_from_mpfr (&real, f, type, GFC_RND_MODE);
|
|
|
return build_real (type, real);
|
return build_real (type, real);
|
}
|
}
|
|
|
/* Converts a backend tree into a real constant. */
|
/* Converts a backend tree into a real constant. */
|
|
|
void
|
void
|
gfc_conv_tree_to_mpfr (mpfr_ptr f, tree source)
|
gfc_conv_tree_to_mpfr (mpfr_ptr f, tree source)
|
{
|
{
|
mpfr_from_real (f, TREE_REAL_CST_PTR (source), GFC_RND_MODE);
|
mpfr_from_real (f, TREE_REAL_CST_PTR (source), GFC_RND_MODE);
|
}
|
}
|
|
|
/* Translate any literal constant to a tree. Constants never have
|
/* Translate any literal constant to a tree. Constants never have
|
pre or post chains. Character literal constants are special
|
pre or post chains. Character literal constants are special
|
special because they have a value and a length, so they cannot be
|
special because they have a value and a length, so they cannot be
|
returned as a single tree. It is up to the caller to set the
|
returned as a single tree. It is up to the caller to set the
|
length somewhere if necessary.
|
length somewhere if necessary.
|
|
|
Returns the translated constant, or aborts if it gets a type it
|
Returns the translated constant, or aborts if it gets a type it
|
can't handle. */
|
can't handle. */
|
|
|
tree
|
tree
|
gfc_conv_constant_to_tree (gfc_expr * expr)
|
gfc_conv_constant_to_tree (gfc_expr * expr)
|
{
|
{
|
tree res;
|
tree res;
|
|
|
gcc_assert (expr->expr_type == EXPR_CONSTANT);
|
gcc_assert (expr->expr_type == EXPR_CONSTANT);
|
|
|
/* If it is has a prescribed memory representation, we build a string
|
/* If it is has a prescribed memory representation, we build a string
|
constant and VIEW_CONVERT to its type. */
|
constant and VIEW_CONVERT to its type. */
|
|
|
switch (expr->ts.type)
|
switch (expr->ts.type)
|
{
|
{
|
case BT_INTEGER:
|
case BT_INTEGER:
|
if (expr->representation.string)
|
if (expr->representation.string)
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
gfc_get_int_type (expr->ts.kind),
|
gfc_get_int_type (expr->ts.kind),
|
gfc_build_string_const (expr->representation.length,
|
gfc_build_string_const (expr->representation.length,
|
expr->representation.string));
|
expr->representation.string));
|
else
|
else
|
return gfc_conv_mpz_to_tree (expr->value.integer, expr->ts.kind);
|
return gfc_conv_mpz_to_tree (expr->value.integer, expr->ts.kind);
|
|
|
case BT_REAL:
|
case BT_REAL:
|
if (expr->representation.string)
|
if (expr->representation.string)
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
gfc_get_real_type (expr->ts.kind),
|
gfc_get_real_type (expr->ts.kind),
|
gfc_build_string_const (expr->representation.length,
|
gfc_build_string_const (expr->representation.length,
|
expr->representation.string));
|
expr->representation.string));
|
else
|
else
|
return gfc_conv_mpfr_to_tree (expr->value.real, expr->ts.kind, expr->is_snan);
|
return gfc_conv_mpfr_to_tree (expr->value.real, expr->ts.kind, expr->is_snan);
|
|
|
case BT_LOGICAL:
|
case BT_LOGICAL:
|
if (expr->representation.string)
|
if (expr->representation.string)
|
{
|
{
|
tree tmp = fold_build1 (VIEW_CONVERT_EXPR,
|
tree tmp = fold_build1 (VIEW_CONVERT_EXPR,
|
gfc_get_int_type (expr->ts.kind),
|
gfc_get_int_type (expr->ts.kind),
|
gfc_build_string_const (expr->representation.length,
|
gfc_build_string_const (expr->representation.length,
|
expr->representation.string));
|
expr->representation.string));
|
if (!integer_zerop (tmp) && !integer_onep (tmp))
|
if (!integer_zerop (tmp) && !integer_onep (tmp))
|
gfc_warning ("Assigning value other than 0 or 1 to LOGICAL"
|
gfc_warning ("Assigning value other than 0 or 1 to LOGICAL"
|
" has undefined result at %L", &expr->where);
|
" has undefined result at %L", &expr->where);
|
return fold_convert (gfc_get_logical_type (expr->ts.kind), tmp);
|
return fold_convert (gfc_get_logical_type (expr->ts.kind), tmp);
|
}
|
}
|
else
|
else
|
return build_int_cst (gfc_get_logical_type (expr->ts.kind),
|
return build_int_cst (gfc_get_logical_type (expr->ts.kind),
|
expr->value.logical);
|
expr->value.logical);
|
|
|
case BT_COMPLEX:
|
case BT_COMPLEX:
|
if (expr->representation.string)
|
if (expr->representation.string)
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
return fold_build1 (VIEW_CONVERT_EXPR,
|
gfc_get_complex_type (expr->ts.kind),
|
gfc_get_complex_type (expr->ts.kind),
|
gfc_build_string_const (expr->representation.length,
|
gfc_build_string_const (expr->representation.length,
|
expr->representation.string));
|
expr->representation.string));
|
else
|
else
|
{
|
{
|
tree real = gfc_conv_mpfr_to_tree (mpc_realref (expr->value.complex),
|
tree real = gfc_conv_mpfr_to_tree (mpc_realref (expr->value.complex),
|
expr->ts.kind, expr->is_snan);
|
expr->ts.kind, expr->is_snan);
|
tree imag = gfc_conv_mpfr_to_tree (mpc_imagref (expr->value.complex),
|
tree imag = gfc_conv_mpfr_to_tree (mpc_imagref (expr->value.complex),
|
expr->ts.kind, expr->is_snan);
|
expr->ts.kind, expr->is_snan);
|
|
|
return build_complex (gfc_typenode_for_spec (&expr->ts),
|
return build_complex (gfc_typenode_for_spec (&expr->ts),
|
real, imag);
|
real, imag);
|
}
|
}
|
|
|
case BT_CHARACTER:
|
case BT_CHARACTER:
|
res = gfc_build_wide_string_const (expr->ts.kind,
|
res = gfc_build_wide_string_const (expr->ts.kind,
|
expr->value.character.length,
|
expr->value.character.length,
|
expr->value.character.string);
|
expr->value.character.string);
|
return res;
|
return res;
|
|
|
case BT_HOLLERITH:
|
case BT_HOLLERITH:
|
return gfc_build_string_const (expr->representation.length,
|
return gfc_build_string_const (expr->representation.length,
|
expr->representation.string);
|
expr->representation.string);
|
|
|
default:
|
default:
|
fatal_error ("gfc_conv_constant_to_tree(): invalid type: %s",
|
fatal_error ("gfc_conv_constant_to_tree(): invalid type: %s",
|
gfc_typename (&expr->ts));
|
gfc_typename (&expr->ts));
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Like gfc_conv_constant_to_tree, but for a simplified expression.
|
/* Like gfc_conv_constant_to_tree, but for a simplified expression.
|
We can handle character literal constants here as well. */
|
We can handle character literal constants here as well. */
|
|
|
void
|
void
|
gfc_conv_constant (gfc_se * se, gfc_expr * expr)
|
gfc_conv_constant (gfc_se * se, gfc_expr * expr)
|
{
|
{
|
/* We may be receiving an expression for C_NULL_PTR or C_NULL_FUNPTR. If
|
/* We may be receiving an expression for C_NULL_PTR or C_NULL_FUNPTR. If
|
so, the expr_type will not yet be an EXPR_CONSTANT. We need to make
|
so, the expr_type will not yet be an EXPR_CONSTANT. We need to make
|
it so here. */
|
it so here. */
|
if (expr->ts.type == BT_DERIVED && expr->ts.u.derived
|
if (expr->ts.type == BT_DERIVED && expr->ts.u.derived
|
&& expr->ts.u.derived->attr.is_iso_c)
|
&& expr->ts.u.derived->attr.is_iso_c)
|
{
|
{
|
if (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
|
if (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
|
|| expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR)
|
|| expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR)
|
{
|
{
|
/* Create a new EXPR_CONSTANT expression for our local uses. */
|
/* Create a new EXPR_CONSTANT expression for our local uses. */
|
expr = gfc_int_expr (0);
|
expr = gfc_int_expr (0);
|
}
|
}
|
}
|
}
|
|
|
if (expr->expr_type != EXPR_CONSTANT)
|
if (expr->expr_type != EXPR_CONSTANT)
|
{
|
{
|
gfc_error ("non-constant initialization expression at %L", &expr->where);
|
gfc_error ("non-constant initialization expression at %L", &expr->where);
|
se->expr = gfc_conv_constant_to_tree (gfc_int_expr (0));
|
se->expr = gfc_conv_constant_to_tree (gfc_int_expr (0));
|
return;
|
return;
|
}
|
}
|
|
|
if (se->ss != NULL)
|
if (se->ss != NULL)
|
{
|
{
|
gcc_assert (se->ss != gfc_ss_terminator);
|
gcc_assert (se->ss != gfc_ss_terminator);
|
gcc_assert (se->ss->type == GFC_SS_SCALAR);
|
gcc_assert (se->ss->type == GFC_SS_SCALAR);
|
gcc_assert (se->ss->expr == expr);
|
gcc_assert (se->ss->expr == expr);
|
|
|
se->expr = se->ss->data.scalar.expr;
|
se->expr = se->ss->data.scalar.expr;
|
se->string_length = se->ss->string_length;
|
se->string_length = se->ss->string_length;
|
gfc_advance_se_ss_chain (se);
|
gfc_advance_se_ss_chain (se);
|
return;
|
return;
|
}
|
}
|
|
|
/* Translate the constant and put it in the simplifier structure. */
|
/* Translate the constant and put it in the simplifier structure. */
|
se->expr = gfc_conv_constant_to_tree (expr);
|
se->expr = gfc_conv_constant_to_tree (expr);
|
|
|
/* If this is a CHARACTER string, set its length in the simplifier
|
/* If this is a CHARACTER string, set its length in the simplifier
|
structure, too. */
|
structure, too. */
|
if (expr->ts.type == BT_CHARACTER)
|
if (expr->ts.type == BT_CHARACTER)
|
se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr)));
|
se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr)));
|
}
|
}
|
|
|
