/* Translation of constants
- Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
- Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
Contributed by Paul Brook
This file is part of GCC.
#include "system.h"
#include "coretypes.h"
#include "tree.h"
-#include "ggc.h"
-#include "toplev.h"
-#include "real.h"
+#include "realmpfr.h"
+#include "diagnostic-core.h" /* For fatal_error. */
#include "double-int.h"
#include "gfortran.h"
#include "trans.h"
#include "trans-const.h"
#include "trans-types.h"
+#include "target-memory.h"
tree gfc_rank_cst[GFC_MAX_DIMENSIONS + 1];
return val;
}
+/* Build a string constant with C char type. */
+
tree
gfc_build_string_const (int length, const char *s)
{
return str;
}
+
+/* Build a string constant with a type given by its kind; take care of
+ non-default character kinds. */
+
+tree
+gfc_build_wide_string_const (int kind, int length, const gfc_char_t *string)
+{
+ int i;
+ tree str, len;
+ size_t size;
+ char *s;
+
+ i = gfc_validate_kind (BT_CHARACTER, kind, false);
+ size = length * gfc_character_kinds[i].bit_size / 8;
+
+ s = XCNEWVAR (char, size);
+ gfc_encode_character (kind, length, string, (unsigned char *) s, size);
+
+ str = build_string (size, s);
+ gfc_free (s);
+
+ len = build_int_cst (NULL_TREE, length);
+ TREE_TYPE (str) =
+ build_array_type (gfc_get_char_type (kind),
+ build_range_type (gfc_charlen_type_node,
+ integer_one_node, len));
+ return str;
+}
+
+
/* Build a Fortran character constant from a zero-terminated string.
There a two version of this function, one that translates the string
and one that doesn't. */
gfc_conv_string_init (tree length, gfc_expr * expr)
{
gfc_char_t *s;
- char *c;
HOST_WIDE_INT len;
int slen;
tree str;
+ bool free_s = false;
gcc_assert (expr->expr_type == EXPR_CONSTANT);
- gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1);
+ gcc_assert (expr->ts.type == BT_CHARACTER);
gcc_assert (INTEGER_CST_P (length));
gcc_assert (TREE_INT_CST_HIGH (length) == 0);
s = gfc_get_wide_string (len);
memcpy (s, expr->value.character.string, slen * sizeof (gfc_char_t));
gfc_wide_memset (&s[slen], ' ', len - slen);
-
- /* FIXME -- currently ignore wide character strings; see assert
- above. */
- c = gfc_widechar_to_char (s, len);
- gfc_free (s);
+ free_s = true;
}
else
- c = gfc_widechar_to_char (expr->value.character.string,
- expr->value.character.length);
+ s = expr->value.character.string;
+
+ str = gfc_build_wide_string_const (expr->ts.kind, len, s);
- str = gfc_build_string_const (len, c);
- gfc_free (c);
+ if (free_s)
+ gfc_free (s);
return str;
}
void
gfc_conv_const_charlen (gfc_charlen * cl)
{
- if (cl->backend_decl)
+ if (!cl || cl->backend_decl)
return;
if (cl->length && cl->length->expr_type == EXPR_CONSTANT)
/* Converts a real constant into backend form. */
tree
-gfc_conv_mpfr_to_tree (mpfr_t f, int kind)
+gfc_conv_mpfr_to_tree (mpfr_t f, int kind, int is_snan)
{
tree type;
int n;
gcc_assert (gfc_real_kinds[n].radix == 2);
type = gfc_get_real_type (kind);
- real_from_mpfr (&real, f, type, GFC_RND_MODE);
+ if (mpfr_nan_p (f) && is_snan)
+ real_from_string (&real, "SNaN");
+ else
+ real_from_mpfr (&real, f, type, GFC_RND_MODE);
+
return build_real (type, real);
}
+/* Returns a real constant that is +Infinity if the target
+ supports infinities for this floating-point mode, and
+ +HUGE_VAL otherwise (the largest representable number). */
+
+tree
+gfc_build_inf_or_huge (tree type, int kind)
+{
+ if (HONOR_INFINITIES (TYPE_MODE (type)))
+ {
+ REAL_VALUE_TYPE real;
+ real_inf (&real);
+ return build_real (type, real);
+ }
+ else
+ {
+ int k = gfc_validate_kind (BT_REAL, kind, false);
+ return gfc_conv_mpfr_to_tree (gfc_real_kinds[k].huge, kind, 0);
+ }
+}
+
/* Converts a backend tree into a real constant. */
void
gfc_conv_constant_to_tree (gfc_expr * expr)
{
tree res;
- char *s;
gcc_assert (expr->expr_type == EXPR_CONSTANT);
{
case BT_INTEGER:
if (expr->representation.string)
- return fold_build1 (VIEW_CONVERT_EXPR,
- gfc_get_int_type (expr->ts.kind),
- gfc_build_string_const (expr->representation.length,
- expr->representation.string));
+ return fold_build1_loc (input_location, VIEW_CONVERT_EXPR,
+ gfc_get_int_type (expr->ts.kind),
+ gfc_build_string_const (expr->representation.length,
+ expr->representation.string));
else
return gfc_conv_mpz_to_tree (expr->value.integer, expr->ts.kind);
case BT_REAL:
if (expr->representation.string)
- return fold_build1 (VIEW_CONVERT_EXPR,
- gfc_get_real_type (expr->ts.kind),
- gfc_build_string_const (expr->representation.length,
- expr->representation.string));
+ return fold_build1_loc (input_location, VIEW_CONVERT_EXPR,
+ gfc_get_real_type (expr->ts.kind),
+ gfc_build_string_const (expr->representation.length,
+ expr->representation.string));
else
- return gfc_conv_mpfr_to_tree (expr->value.real, expr->ts.kind);
+ return gfc_conv_mpfr_to_tree (expr->value.real, expr->ts.kind, expr->is_snan);
case BT_LOGICAL:
if (expr->representation.string)
- return fold_build1 (VIEW_CONVERT_EXPR,
- gfc_get_logical_type (expr->ts.kind),
- gfc_build_string_const (expr->representation.length,
- expr->representation.string));
+ {
+ tree tmp = fold_build1_loc (input_location, VIEW_CONVERT_EXPR,
+ gfc_get_int_type (expr->ts.kind),
+ gfc_build_string_const (expr->representation.length,
+ expr->representation.string));
+ if (!integer_zerop (tmp) && !integer_onep (tmp))
+ gfc_warning ("Assigning value other than 0 or 1 to LOGICAL"
+ " has undefined result at %L", &expr->where);
+ return fold_convert (gfc_get_logical_type (expr->ts.kind), tmp);
+ }
else
return build_int_cst (gfc_get_logical_type (expr->ts.kind),
- expr->value.logical);
+ expr->value.logical);
case BT_COMPLEX:
if (expr->representation.string)
- return fold_build1 (VIEW_CONVERT_EXPR,
- gfc_get_complex_type (expr->ts.kind),
- gfc_build_string_const (expr->representation.length,
- expr->representation.string));
+ return fold_build1_loc (input_location, VIEW_CONVERT_EXPR,
+ gfc_get_complex_type (expr->ts.kind),
+ gfc_build_string_const (expr->representation.length,
+ expr->representation.string));
else
{
- tree real = gfc_conv_mpfr_to_tree (expr->value.complex.r,
- expr->ts.kind);
- tree imag = gfc_conv_mpfr_to_tree (expr->value.complex.i,
- expr->ts.kind);
+ tree real = gfc_conv_mpfr_to_tree (mpc_realref (expr->value.complex),
+ expr->ts.kind, expr->is_snan);
+ tree imag = gfc_conv_mpfr_to_tree (mpc_imagref (expr->value.complex),
+ expr->ts.kind, expr->is_snan);
return build_complex (gfc_typenode_for_spec (&expr->ts),
real, imag);
}
case BT_CHARACTER:
- gcc_assert (expr->ts.kind == 1);
- s = gfc_widechar_to_char (expr->value.character.string,
- expr->value.character.length);
- res = gfc_build_string_const (expr->value.character.length, s);
- gfc_free (s);
+ res = gfc_build_wide_string_const (expr->ts.kind,
+ expr->value.character.length,
+ expr->value.character.string);
return res;
case BT_HOLLERITH:
gfc_conv_constant (gfc_se * se, gfc_expr * expr)
{
/* We may be receiving an expression for C_NULL_PTR or C_NULL_FUNPTR. If
- so, they 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. */
- if (expr->ts.type == BT_DERIVED && expr->ts.derived
- && expr->ts.derived->attr.is_iso_c)
+ if (expr->ts.type == BT_DERIVED && expr->ts.u.derived
+ && expr->ts.u.derived->attr.is_iso_c)
{
if (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
|| expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR)
{
/* Create a new EXPR_CONSTANT expression for our local uses. */
- expr = gfc_int_expr (0);
+ expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, 0);
}
}
- gcc_assert (expr->expr_type == EXPR_CONSTANT);
+ if (expr->expr_type != EXPR_CONSTANT)
+ {
+ gfc_expr *e = gfc_get_int_expr (gfc_default_integer_kind, NULL, 0);
+ gfc_error ("non-constant initialization expression at %L", &expr->where);
+ se->expr = gfc_conv_constant_to_tree (e);
+ return;
+ }
if (se->ss != NULL)
{
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