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freebsd-skq/contrib/gcc/cp/cvt.c

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Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Language-level data type conversion for GNU C++.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Copyright (C) 1987, 88, 92-97, 1998 Free Software Foundation, Inc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Hacked by Michael Tiemann (tiemann@cygnus.com)
This file is part of GNU CC.
GNU CC 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 2, or (at your option)
any later version.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This file contains the functions for converting C expressions
to different data types. The only entry point is `convert'.
Every language front end must have a `convert' function
but what kind of conversions it does will depend on the language. */
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "tree.h"
#include "flags.h"
#include "cp-tree.h"
#include "convert.h"
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#include "toplev.h"
#include "decl.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
static tree cp_convert_to_pointer PROTO((tree, tree));
static tree convert_to_pointer_force PROTO((tree, tree));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static tree build_up_reference PROTO((tree, tree, int));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Change of width--truncation and extension of integers or reals--
is represented with NOP_EXPR. Proper functioning of many things
assumes that no other conversions can be NOP_EXPRs.
Conversion between integer and pointer is represented with CONVERT_EXPR.
Converting integer to real uses FLOAT_EXPR
and real to integer uses FIX_TRUNC_EXPR.
Here is a list of all the functions that assume that widening and
narrowing is always done with a NOP_EXPR:
In convert.c, convert_to_integer.
In c-typeck.c, build_binary_op_nodefault (boolean ops),
and truthvalue_conversion.
In expr.c: expand_expr, for operands of a MULT_EXPR.
In fold-const.c: fold.
In tree.c: get_narrower and get_unwidened.
C++: in multiple-inheritance, converting between pointers may involve
adjusting them by a delta stored within the class definition. */
/* Subroutines of `convert'. */
/* if converting pointer to pointer
if dealing with classes, check for derived->base or vice versa
else if dealing with method pointers, delegate
else convert blindly
else if converting class, pass off to build_type_conversion
else try C-style pointer conversion */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static tree
cp_convert_to_pointer (type, expr)
tree type, expr;
{
register tree intype = TREE_TYPE (expr);
register enum tree_code form;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree rval;
if (IS_AGGR_TYPE (intype))
{
intype = complete_type (intype);
if (TYPE_SIZE (intype) == NULL_TREE)
{
cp_error ("can't convert from incomplete type `%T' to `%T'",
intype, type);
return error_mark_node;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rval = build_type_conversion (type, expr, 1);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (rval)
{
if (rval == error_mark_node)
cp_error ("conversion of `%E' from `%T' to `%T' is ambiguous",
expr, intype, type);
return rval;
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Handle anachronistic conversions from (::*)() to cv void* or (*)(). */
if (TREE_CODE (type) == POINTER_TYPE
&& (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE
|| TYPE_MAIN_VARIANT (TREE_TYPE (type)) == void_type_node))
{
/* Allow an implicit this pointer for pointer to member
functions. */
if (TYPE_PTRMEMFUNC_P (intype))
{
tree fntype = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (intype));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
tree decl = maybe_dummy_object (TYPE_METHOD_BASETYPE (fntype), 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
expr = build (OFFSET_REF, fntype, decl, expr);
}
if (TREE_CODE (expr) == OFFSET_REF
&& TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE)
expr = resolve_offset_ref (expr);
if (TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE)
expr = build_addr_func (expr);
if (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE)
{
if (TREE_CODE (TREE_TYPE (TREE_TYPE (expr))) == METHOD_TYPE)
if (pedantic || warn_pmf2ptr)
cp_pedwarn ("converting from `%T' to `%T'", TREE_TYPE (expr),
type);
return build1 (NOP_EXPR, type, expr);
}
intype = TREE_TYPE (expr);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
form = TREE_CODE (intype);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (POINTER_TYPE_P (intype))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
intype = TYPE_MAIN_VARIANT (intype);
if (TYPE_MAIN_VARIANT (type) != intype
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& TREE_CODE (type) == POINTER_TYPE
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& TREE_CODE (TREE_TYPE (type)) == RECORD_TYPE
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& IS_AGGR_TYPE (TREE_TYPE (type))
&& IS_AGGR_TYPE (TREE_TYPE (intype))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE
/* If EXPR is NULL, then we don't need to do any arithmetic
to convert it:
[conv.ptr]
The null pointer value is converted to the null pointer
value of the destination type. */
&& !integer_zerop (expr))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
enum tree_code code = PLUS_EXPR;
tree binfo = get_binfo (TREE_TYPE (type), TREE_TYPE (intype), 1);
if (binfo == error_mark_node)
return error_mark_node;
if (binfo == NULL_TREE)
{
binfo = get_binfo (TREE_TYPE (intype), TREE_TYPE (type), 1);
if (binfo == error_mark_node)
return error_mark_node;
code = MINUS_EXPR;
}
if (binfo)
{
if (TYPE_USES_VIRTUAL_BASECLASSES (TREE_TYPE (type))
|| TYPE_USES_VIRTUAL_BASECLASSES (TREE_TYPE (intype))
|| ! BINFO_OFFSET_ZEROP (binfo))
{
/* Need to get the path we took. */
tree path;
if (code == PLUS_EXPR)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
get_base_distance (TREE_TYPE (type), TREE_TYPE (intype),
0, &path);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
get_base_distance (TREE_TYPE (intype), TREE_TYPE (type),
0, &path);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return build_vbase_path (code, type, expr, path, 0);
}
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
tree b1 = TYPE_OFFSET_BASETYPE (TREE_TYPE (type));
tree b2 = TYPE_OFFSET_BASETYPE (TREE_TYPE (intype));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree binfo = get_binfo (b2, b1, 1);
enum tree_code code = PLUS_EXPR;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (binfo == NULL_TREE)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
binfo = get_binfo (b1, b2, 1);
code = MINUS_EXPR;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (binfo == error_mark_node)
return error_mark_node;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (binfo && ! TREE_VIA_VIRTUAL (binfo))
expr = size_binop (code, expr, BINFO_OFFSET (binfo));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (TYPE_PTRMEMFUNC_P (type))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
cp_error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval = build1 (NOP_EXPR, type, expr);
TREE_CONSTANT (rval) = TREE_CONSTANT (expr);
return rval;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (TYPE_PTRMEMFUNC_P (type) && TYPE_PTRMEMFUNC_P (intype))
return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr, 1);
else if (TYPE_PTRMEMFUNC_P (intype))
{
cp_error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
my_friendly_assert (form != OFFSET_TYPE, 186);
if (TYPE_LANG_SPECIFIC (intype)
&& (IS_SIGNATURE_POINTER (intype) || IS_SIGNATURE_REFERENCE (intype)))
return convert_to_pointer (type, build_optr_ref (expr));
if (integer_zerop (expr))
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (TYPE_PTRMEMFUNC_P (type))
return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expr = build_int_2 (0, 0);
TREE_TYPE (expr) = type;
return expr;
}
if (INTEGRAL_CODE_P (form))
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (TYPE_PRECISION (intype) == POINTER_SIZE)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return build1 (CONVERT_EXPR, type, expr);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
expr = cp_convert (type_for_size (POINTER_SIZE, 0), expr);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Modes may be different but sizes should be the same. */
if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (expr)))
!= GET_MODE_SIZE (TYPE_MODE (type)))
/* There is supposed to be some integral type
that is the same width as a pointer. */
abort ();
return convert_to_pointer (type, expr);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (type_unknown_p (expr))
return instantiate_type (type, expr, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
cp_error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
/* Like convert, except permit conversions to take place which
are not normally allowed due to access restrictions
(such as conversion from sub-type to private super-type). */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static tree
convert_to_pointer_force (type, expr)
tree type, expr;
{
register tree intype = TREE_TYPE (expr);
register enum tree_code form = TREE_CODE (intype);
if (integer_zerop (expr))
{
expr = build_int_2 (0, 0);
TREE_TYPE (expr) = type;
return expr;
}
/* Convert signature pointer/reference to `void *' first. */
if (form == RECORD_TYPE
&& (IS_SIGNATURE_POINTER (intype) || IS_SIGNATURE_REFERENCE (intype)))
{
expr = build_optr_ref (expr);
intype = TREE_TYPE (expr);
form = TREE_CODE (intype);
}
if (form == POINTER_TYPE)
{
intype = TYPE_MAIN_VARIANT (intype);
if (TYPE_MAIN_VARIANT (type) != intype
&& TREE_CODE (TREE_TYPE (type)) == RECORD_TYPE
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& IS_AGGR_TYPE (TREE_TYPE (type))
&& IS_AGGR_TYPE (TREE_TYPE (intype))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE)
{
enum tree_code code = PLUS_EXPR;
tree path;
int distance = get_base_distance (TREE_TYPE (type),
TREE_TYPE (intype), 0, &path);
if (distance == -2)
{
ambig:
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cp_error ("type `%T' is ambiguous baseclass of `%s'",
TREE_TYPE (type),
TYPE_NAME_STRING (TREE_TYPE (intype)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return error_mark_node;
}
if (distance == -1)
{
distance = get_base_distance (TREE_TYPE (intype),
TREE_TYPE (type), 0, &path);
if (distance == -2)
goto ambig;
if (distance < 0)
/* Doesn't need any special help from us. */
return build1 (NOP_EXPR, type, expr);
code = MINUS_EXPR;
}
return build_vbase_path (code, type, expr, path, 0);
}
}
return cp_convert_to_pointer (type, expr);
}
/* We are passing something to a function which requires a reference.
The type we are interested in is in TYPE. The initial
value we have to begin with is in ARG.
FLAGS controls how we manage access checking.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
DIRECT_BIND in FLAGS controls how any temporaries are generated. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static tree
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
build_up_reference (type, arg, flags)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree type, arg;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int flags;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree rval;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree argtype = TREE_TYPE (arg);
tree target_type = TREE_TYPE (type);
my_friendly_assert (TREE_CODE (type) == REFERENCE_TYPE, 187);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if ((flags & DIRECT_BIND) && ! real_lvalue_p (arg))
{
tree targ = arg;
if (toplevel_bindings_p ())
arg = get_temp_name (argtype, 1);
else
{
arg = pushdecl (build_decl (VAR_DECL, NULL_TREE, argtype));
DECL_ARTIFICIAL (arg) = 1;
}
DECL_INITIAL (arg) = targ;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
cp_finish_decl (arg, targ, NULL_TREE, 0,
LOOKUP_ONLYCONVERTING|DIRECT_BIND);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
else if (!(flags & DIRECT_BIND) && ! lvalue_p (arg))
{
tree slot = build_decl (VAR_DECL, NULL_TREE, argtype);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
DECL_ARTIFICIAL (slot) = 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
arg = build (TARGET_EXPR, argtype, slot, arg, NULL_TREE, NULL_TREE);
TREE_SIDE_EFFECTS (arg) = 1;
}
/* If we had a way to wrap this up, and say, if we ever needed it's
address, transform all occurrences of the register, into a memory
reference we could win better. */
rval = build_unary_op (ADDR_EXPR, arg, 1);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (rval == error_mark_node)
return error_mark_node;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if ((flags & LOOKUP_PROTECT)
&& TYPE_MAIN_VARIANT (argtype) != TYPE_MAIN_VARIANT (target_type)
&& IS_AGGR_TYPE (argtype)
&& IS_AGGR_TYPE (target_type))
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* We go through get_binfo for the access control. */
tree binfo = get_binfo (target_type, argtype, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (binfo == error_mark_node)
return error_mark_node;
if (binfo == NULL_TREE)
return error_not_base_type (target_type, argtype);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval = convert_pointer_to_real (binfo, rval);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval
= convert_to_pointer_force (build_pointer_type (target_type), rval);
rval = build1 (NOP_EXPR, type, rval);
TREE_CONSTANT (rval) = TREE_CONSTANT (TREE_OPERAND (rval, 0));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return rval;
}
/* For C++: Only need to do one-level references, but cannot
get tripped up on signed/unsigned differences.
DECL is either NULL_TREE or the _DECL node for a reference that is being
initialized. It can be error_mark_node if we don't know the _DECL but
we know it's an initialization. */
tree
convert_to_reference (reftype, expr, convtype, flags, decl)
tree reftype, expr;
int convtype, flags;
tree decl;
{
register tree type = TYPE_MAIN_VARIANT (TREE_TYPE (reftype));
register tree intype = TREE_TYPE (expr);
tree rval = NULL_TREE;
tree rval_as_conversion = NULL_TREE;
int i;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (TREE_CODE (type) == FUNCTION_TYPE && intype == unknown_type_node)
{
expr = instantiate_type (type, expr,
(flags & LOOKUP_COMPLAIN) != 0);
if (expr == error_mark_node)
return error_mark_node;
intype = TREE_TYPE (expr);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_CODE (intype) == REFERENCE_TYPE)
my_friendly_abort (364);
intype = TYPE_MAIN_VARIANT (intype);
i = comp_target_types (type, intype, 0);
if (i <= 0 && (convtype & CONV_IMPLICIT) && IS_AGGR_TYPE (intype)
&& ! (flags & LOOKUP_NO_CONVERSION))
{
/* Look for a user-defined conversion to lvalue that we can use. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval_as_conversion
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
= build_type_conversion (reftype, expr, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (rval_as_conversion && rval_as_conversion != error_mark_node
&& real_lvalue_p (rval_as_conversion))
{
expr = rval_as_conversion;
rval_as_conversion = NULL_TREE;
intype = type;
i = 1;
}
}
if (((convtype & CONV_STATIC) && i == -1)
|| ((convtype & CONV_IMPLICIT) && i == 1))
{
if (flags & LOOKUP_COMPLAIN)
{
tree ttl = TREE_TYPE (reftype);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
tree ttr = lvalue_type (expr);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* [dcl.init.ref] says that if an rvalue is used to
initialize a reference, then the reference must be to a
non-volatile const type. */
if (! real_lvalue_p (expr)
&& !CP_TYPE_CONST_NON_VOLATILE_P (ttl))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
const char *msg;
if (CP_TYPE_VOLATILE_P (ttl) && decl)
msg = "initialization of volatile reference type `%#T'";
else if (CP_TYPE_VOLATILE_P (ttl))
msg = "conversion to volatile reference type `%#T'";
else if (decl)
msg = "initialization of non-const reference type `%#T'";
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
msg = "conversion to non-const reference type `%#T'";
cp_pedwarn (msg, reftype);
cp_pedwarn ("from rvalue of type `%T'", intype);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (! (convtype & CONV_CONST)
&& !at_least_as_qualified_p (ttl, ttr))
cp_pedwarn ("conversion from `%T' to `%T' discards qualifiers",
ttr, reftype);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return build_up_reference (reftype, expr, flags);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else if ((convtype & CONV_REINTERPRET) && lvalue_p (expr))
{
/* When casting an lvalue to a reference type, just convert into
a pointer to the new type and deference it. This is allowed
by San Diego WP section 5.2.9 paragraph 12, though perhaps it
should be done directly (jason). (int &)ri ---> *(int*)&ri */
/* B* bp; A& ar = (A&)bp; is valid, but it's probably not what they
meant. */
if (TREE_CODE (intype) == POINTER_TYPE
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& (comptypes (TREE_TYPE (intype), type,
COMPARE_BASE | COMPARE_RELAXED )))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
cp_warning ("casting `%T' to `%T' does not dereference pointer",
intype, reftype);
rval = build_unary_op (ADDR_EXPR, expr, 0);
if (rval != error_mark_node)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval = convert_force (build_pointer_type (TREE_TYPE (reftype)),
rval, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (rval != error_mark_node)
rval = build1 (NOP_EXPR, reftype, rval);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rval = convert_for_initialization (NULL_TREE, type, expr, flags,
"converting", 0, 0);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (rval == NULL_TREE || rval == error_mark_node)
return rval;
rval = build_up_reference (reftype, rval, flags);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (rval && ! CP_TYPE_CONST_P (TREE_TYPE (reftype)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
cp_pedwarn ("initializing non-const `%T' with `%T' will use a temporary",
reftype, intype);
}
if (rval)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* If we found a way to convert earlier, then use it. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return rval;
}
my_friendly_assert (TREE_CODE (intype) != OFFSET_TYPE, 189);
if (flags & LOOKUP_COMPLAIN)
cp_error ("cannot convert type `%T' to type `%T'", intype, reftype);
if (flags & LOOKUP_SPECULATIVELY)
return NULL_TREE;
return error_mark_node;
}
/* We are using a reference VAL for its value. Bash that reference all the
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
way down to its lowest form. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
convert_from_reference (val)
tree val;
{
tree type = TREE_TYPE (val);
if (TREE_CODE (type) == OFFSET_TYPE)
type = TREE_TYPE (type);
if (TREE_CODE (type) == REFERENCE_TYPE)
return build_indirect_ref (val, NULL_PTR);
return val;
}
/* Call this when we know (for any reason) that expr is not, in fact,
zero. This routine is like convert_pointer_to, but it pays
attention to which specific instance of what type we want to
convert to. This routine should eventually become
convert_to_pointer after all references to convert_to_pointer
are removed. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
convert_pointer_to_real (binfo, expr)
tree binfo, expr;
{
register tree intype = TREE_TYPE (expr);
tree ptr_type;
tree type, rval;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (intype == error_mark_node)
return error_mark_node;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_CODE (binfo) == TREE_VEC)
type = BINFO_TYPE (binfo);
else if (IS_AGGR_TYPE (binfo))
{
type = binfo;
}
else
{
type = binfo;
binfo = NULL_TREE;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
ptr_type = cp_build_qualified_type (type,
CP_TYPE_QUALS (TREE_TYPE (intype)));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
ptr_type = build_pointer_type (ptr_type);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (same_type_p (ptr_type, TYPE_MAIN_VARIANT (intype)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return expr;
my_friendly_assert (!integer_zerop (expr), 191);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
intype = TYPE_MAIN_VARIANT (TREE_TYPE (intype));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_CODE (type) == RECORD_TYPE
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& TREE_CODE (intype) == RECORD_TYPE
&& type != intype)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
tree path;
int distance
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
= get_base_distance (binfo, intype, 0, &path);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* This function shouldn't be called with unqualified arguments
but if it is, give them an error message that they can read. */
if (distance < 0)
{
cp_error ("cannot convert a pointer of type `%T' to a pointer of type `%T'",
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
intype, type);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (distance == -2)
cp_error ("because `%T' is an ambiguous base class", type);
return error_mark_node;
}
return build_vbase_path (PLUS_EXPR, ptr_type, expr, path, 1);
}
rval = build1 (NOP_EXPR, ptr_type,
TREE_CODE (expr) == NOP_EXPR ? TREE_OPERAND (expr, 0) : expr);
TREE_CONSTANT (rval) = TREE_CONSTANT (expr);
return rval;
}
/* Call this when we know (for any reason) that expr is
not, in fact, zero. This routine gets a type out of the first
argument and uses it to search for the type to convert to. If there
is more than one instance of that type in the expr, the conversion is
ambiguous. This routine should eventually go away, and all
callers should use convert_to_pointer_real. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
convert_pointer_to (binfo, expr)
tree binfo, expr;
{
tree type;
if (TREE_CODE (binfo) == TREE_VEC)
type = BINFO_TYPE (binfo);
else if (IS_AGGR_TYPE (binfo))
type = binfo;
else
type = binfo;
return convert_pointer_to_real (type, expr);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* C++ conversions, preference to static cast conversions. */
tree
cp_convert (type, expr)
tree type, expr;
{
return ocp_convert (type, expr, CONV_OLD_CONVERT, LOOKUP_NORMAL);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Conversion...
FLAGS indicates how we should behave. */
tree
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
ocp_convert (type, expr, convtype, flags)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree type, expr;
int convtype, flags;
{
register tree e = expr;
register enum tree_code code = TREE_CODE (type);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (e == error_mark_node
|| TREE_TYPE (e) == error_mark_node)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return error_mark_node;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (TREE_READONLY_DECL_P (e))
e = decl_constant_value (e);
if (IS_AGGR_TYPE (type) && (convtype & CONV_FORCE_TEMP)
/* Some internal structures (vtable_entry_type, sigtbl_ptr_type)
don't go through finish_struct, so they don't have the synthesized
constructors. So don't force a temporary. */
&& TYPE_HAS_CONSTRUCTOR (type))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* We need a new temporary; don't take this shortcut. */;
else if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (e)))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
if (same_type_p (type, TREE_TYPE (e)))
/* The call to fold will not always remove the NOP_EXPR as
might be expected, since if one of the types is a typedef;
the comparsion in fold is just equality of pointers, not a
call to comptypes. We don't call fold in this case because
that can result in infinite recursion; fold will call
convert, which will call ocp_convert, etc. */
return e;
else
return fold (build1 (NOP_EXPR, type, e));
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (code == VOID_TYPE && (convtype & CONV_STATIC))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
e = require_complete_type_in_void (e);
if (e != error_mark_node)
e = build1 (CONVERT_EXPR, void_type_node, e);
return e;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#if 0
/* This is incorrect. A truncation can't be stripped this way.
Extensions will be stripped by the use of get_unwidened. */
if (TREE_CODE (e) == NOP_EXPR)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return cp_convert (type, TREE_OPERAND (e, 0));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#endif
/* Just convert to the type of the member. */
if (code == OFFSET_TYPE)
{
type = TREE_TYPE (type);
code = TREE_CODE (type);
}
#if 0
if (code == REFERENCE_TYPE)
return fold (convert_to_reference (type, e, convtype, flags, NULL_TREE));
else if (TREE_CODE (TREE_TYPE (e)) == REFERENCE_TYPE)
e = convert_from_reference (e);
#endif
if (TREE_CODE (e) == OFFSET_REF)
e = resolve_offset_ref (e);
if (INTEGRAL_CODE_P (code))
{
tree intype = TREE_TYPE (e);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* enum = enum, enum = int, enum = float, (enum)pointer are all
errors. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (TREE_CODE (type) == ENUMERAL_TYPE
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& ((ARITHMETIC_TYPE_P (intype) && ! (convtype & CONV_STATIC))
|| (TREE_CODE (intype) == POINTER_TYPE)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
cp_pedwarn ("conversion from `%#T' to `%#T'", intype, type);
if (flag_pedantic_errors)
return error_mark_node;
}
if (IS_AGGR_TYPE (intype))
{
tree rval;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rval = build_type_conversion (type, e, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (rval)
return rval;
if (flags & LOOKUP_COMPLAIN)
cp_error ("`%#T' used where a `%T' was expected", intype, type);
if (flags & LOOKUP_SPECULATIVELY)
return NULL_TREE;
return error_mark_node;
}
if (code == BOOLEAN_TYPE)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
/* Common Ada/Pascal programmer's mistake. We always warn
about this since it is so bad. */
if (TREE_CODE (expr) == FUNCTION_DECL)
cp_warning ("the address of `%D', will always be `true'", expr);
return truthvalue_conversion (e);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return fold (convert_to_integer (type, e));
}
if (code == POINTER_TYPE || code == REFERENCE_TYPE
|| TYPE_PTRMEMFUNC_P (type))
return fold (cp_convert_to_pointer (type, e));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (code == REAL_TYPE || code == COMPLEX_TYPE)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (IS_AGGR_TYPE (TREE_TYPE (e)))
{
tree rval;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rval = build_type_conversion (type, e, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (rval)
return rval;
else
if (flags & LOOKUP_COMPLAIN)
cp_error ("`%#T' used where a floating point value was expected",
TREE_TYPE (e));
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (code == REAL_TYPE)
return fold (convert_to_real (type, e));
else if (code == COMPLEX_TYPE)
return fold (convert_to_complex (type, e));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* New C++ semantics: since assignment is now based on
memberwise copying, if the rhs type is derived from the
lhs type, then we may still do a conversion. */
if (IS_AGGR_TYPE_CODE (code))
{
tree dtype = TREE_TYPE (e);
tree ctor = NULL_TREE;
dtype = TYPE_MAIN_VARIANT (dtype);
/* Conversion of object pointers or signature pointers/references
to signature pointers/references. */
if (TYPE_LANG_SPECIFIC (type)
&& (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type)))
{
tree constructor = build_signature_pointer_constructor (type, expr);
tree sig_ty = SIGNATURE_TYPE (type);
tree sig_ptr;
if (constructor == error_mark_node)
return error_mark_node;
sig_ptr = get_temp_name (type, 1);
DECL_INITIAL (sig_ptr) = constructor;
CLEAR_SIGNATURE (sig_ty);
cp_finish_decl (sig_ptr, constructor, NULL_TREE, 0, 0);
SET_SIGNATURE (sig_ty);
TREE_READONLY (sig_ptr) = 1;
return sig_ptr;
}
/* Conversion between aggregate types. New C++ semantics allow
objects of derived type to be cast to objects of base type.
Old semantics only allowed this between pointers.
There may be some ambiguity between using a constructor
vs. using a type conversion operator when both apply. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
ctor = e;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (IS_AGGR_TYPE (type) && CLASSTYPE_ABSTRACT_VIRTUALS (type))
{
abstract_virtuals_error (NULL_TREE, type);
return error_mark_node;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if ((flags & LOOKUP_ONLYCONVERTING)
&& ! (IS_AGGR_TYPE (dtype) && DERIVED_FROM_P (type, dtype)))
/* For copy-initialization, first we create a temp of the proper type
with a user-defined conversion sequence, then we direct-initialize
the target with the temp (see [dcl.init]). */
ctor = build_user_type_conversion (type, ctor, flags);
if (ctor)
ctor = build_method_call (NULL_TREE, ctor_identifier,
build_expr_list (NULL_TREE, ctor),
TYPE_BINFO (type), flags);
if (ctor)
return build_cplus_new (type, ctor);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* If TYPE or TREE_TYPE (E) is not on the permanent_obstack,
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
then it won't be hashed and hence compare as not equal,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
even when it is. */
if (code == ARRAY_TYPE
&& TREE_TYPE (TREE_TYPE (e)) == TREE_TYPE (type)
&& index_type_equal (TYPE_DOMAIN (TREE_TYPE (e)), TYPE_DOMAIN (type)))
return e;
if (flags & LOOKUP_COMPLAIN)
cp_error ("conversion from `%T' to non-scalar type `%T' requested",
TREE_TYPE (expr), type);
if (flags & LOOKUP_SPECULATIVELY)
return NULL_TREE;
return error_mark_node;
}
/* Create an expression whose value is that of EXPR,
converted to type TYPE. The TREE_TYPE of the value
is always TYPE. This function implements all reasonable
conversions; callers should filter out those that are
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
not permitted by the language being compiled.
Most of this routine is from build_reinterpret_cast.
The backend cannot call cp_convert (what was convert) because
conversions to/from basetypes may involve memory references
(vbases) and adding or subtracting small values (multiple
inheritance), but it calls convert from the constant folding code
on subtrees of already build trees after it has ripped them apart.
Also, if we ever support range variables, we'll probably also have to
do a little bit more work. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
convert (type, expr)
tree type, expr;
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree intype;
if (type == error_mark_node || expr == error_mark_node)
return error_mark_node;
intype = TREE_TYPE (expr);
if (POINTER_TYPE_P (type) && POINTER_TYPE_P (intype))
{
if (TREE_READONLY_DECL_P (expr))
expr = decl_constant_value (expr);
return fold (build1 (NOP_EXPR, type, expr));
}
return ocp_convert (type, expr, CONV_OLD_CONVERT,
LOOKUP_NORMAL|LOOKUP_NO_CONVERSION);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Like cp_convert, except permit conversions to take place which
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
are not normally allowed due to access restrictions
(such as conversion from sub-type to private super-type). */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
convert_force (type, expr, convtype)
tree type;
tree expr;
int convtype;
{
register tree e = expr;
register enum tree_code code = TREE_CODE (type);
if (code == REFERENCE_TYPE)
return fold (convert_to_reference (type, e, CONV_C_CAST, LOOKUP_COMPLAIN,
NULL_TREE));
else if (TREE_CODE (TREE_TYPE (e)) == REFERENCE_TYPE)
e = convert_from_reference (e);
if (code == POINTER_TYPE)
return fold (convert_to_pointer_force (type, e));
/* From typeck.c convert_for_assignment */
if (((TREE_CODE (TREE_TYPE (e)) == POINTER_TYPE && TREE_CODE (e) == ADDR_EXPR
&& TREE_CODE (TREE_TYPE (e)) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (TREE_TYPE (e))) == METHOD_TYPE)
|| integer_zerop (e)
|| TYPE_PTRMEMFUNC_P (TREE_TYPE (e)))
&& TYPE_PTRMEMFUNC_P (type))
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* compatible pointer to member functions. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), e, 1);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return ocp_convert (type, e, CONV_C_CAST|convtype, LOOKUP_NORMAL);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Convert an aggregate EXPR to type XTYPE. If a conversion
exists, return the attempted conversion. This may
return ERROR_MARK_NODE if the conversion is not
allowed (references private members, etc).
If no conversion exists, NULL_TREE is returned.
If (FOR_SURE & 1) is non-zero, then we allow this type conversion
to take place immediately. Otherwise, we build a SAVE_EXPR
which can be evaluated if the results are ever needed.
Changes to this functions should be mirrored in user_harshness.
FIXME: Ambiguity checking is wrong. Should choose one by the implicit
object parameter, or by the second standard conversion sequence if
that doesn't do it. This will probably wait for an overloading rewrite.
(jason 8/9/95) */
tree
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
build_type_conversion (xtype, expr, for_sure)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree xtype, expr;
int for_sure;
{
/* C++: check to see if we can convert this aggregate type
into the required type. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return build_user_type_conversion
(xtype, expr, for_sure ? LOOKUP_NORMAL : 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Convert the given EXPR to one of a group of types suitable for use in an
expression. DESIRES is a combination of various WANT_* flags (q.v.)
which indicates which types are suitable. If COMPLAIN is 1, complain
about ambiguity; otherwise, the caller will deal with it. */
tree
build_expr_type_conversion (desires, expr, complain)
int desires;
tree expr;
int complain;
{
tree basetype = TREE_TYPE (expr);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
tree conv = NULL_TREE;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree winner = NULL_TREE;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (expr == null_node
&& (desires & WANT_INT)
&& !(desires & WANT_NULL))
cp_warning ("converting NULL to non-pointer type");
if (TREE_CODE (expr) == OFFSET_REF)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expr = resolve_offset_ref (expr);
expr = convert_from_reference (expr);
basetype = TREE_TYPE (expr);
if (! IS_AGGR_TYPE (basetype))
switch (TREE_CODE (basetype))
{
case INTEGER_TYPE:
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if ((desires & WANT_NULL) && null_ptr_cst_p (expr))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return expr;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* else fall through... */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case BOOLEAN_TYPE:
return (desires & WANT_INT) ? expr : NULL_TREE;
case ENUMERAL_TYPE:
return (desires & WANT_ENUM) ? expr : NULL_TREE;
case REAL_TYPE:
return (desires & WANT_FLOAT) ? expr : NULL_TREE;
case POINTER_TYPE:
return (desires & WANT_POINTER) ? expr : NULL_TREE;
case FUNCTION_TYPE:
case ARRAY_TYPE:
return (desires & WANT_POINTER) ? default_conversion (expr)
: NULL_TREE;
default:
return NULL_TREE;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* The code for conversions from class type is currently only used for
delete expressions. Other expressions are handled by build_new_op. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (! TYPE_HAS_CONVERSION (basetype))
return NULL_TREE;
for (conv = lookup_conversions (basetype); conv; conv = TREE_CHAIN (conv))
{
int win = 0;
tree candidate;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree cand = TREE_VALUE (conv);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (winner && winner == cand)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
continue;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
candidate = TREE_TYPE (TREE_TYPE (cand));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_CODE (candidate) == REFERENCE_TYPE)
candidate = TREE_TYPE (candidate);
switch (TREE_CODE (candidate))
{
case BOOLEAN_TYPE:
case INTEGER_TYPE:
win = (desires & WANT_INT); break;
case ENUMERAL_TYPE:
win = (desires & WANT_ENUM); break;
case REAL_TYPE:
win = (desires & WANT_FLOAT); break;
case POINTER_TYPE:
win = (desires & WANT_POINTER); break;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
if (win)
{
if (winner)
{
if (complain)
{
cp_error ("ambiguous default type conversion from `%T'",
basetype);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cp_error (" candidate conversions include `%D' and `%D'",
winner, cand);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
return error_mark_node;
}
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
winner = cand;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
if (winner)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree type = TREE_TYPE (TREE_TYPE (winner));
if (TREE_CODE (type) == REFERENCE_TYPE)
type = TREE_TYPE (type);
return build_user_type_conversion (type, expr, LOOKUP_NORMAL);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return NULL_TREE;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Implements integral promotion (4.1) and float->double promotion. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree
type_promotes_to (type)
tree type;
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int type_quals;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (type == error_mark_node)
return error_mark_node;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
type_quals = CP_TYPE_QUALS (type);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
type = TYPE_MAIN_VARIANT (type);
/* bool always promotes to int (not unsigned), even if it's the same
size. */
if (type == boolean_type_node)
type = integer_type_node;
/* Normally convert enums to int, but convert wide enums to something
wider. */
else if (TREE_CODE (type) == ENUMERAL_TYPE
|| type == wchar_type_node)
{
int precision = MAX (TYPE_PRECISION (type),
TYPE_PRECISION (integer_type_node));
tree totype = type_for_size (precision, 0);
if (TREE_UNSIGNED (type)
&& ! int_fits_type_p (TYPE_MAX_VALUE (type), totype))
type = type_for_size (precision, 1);
else
type = totype;
}
else if (C_PROMOTING_INTEGER_TYPE_P (type))
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Retain unsignedness if really not getting bigger. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_UNSIGNED (type)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
type = unsigned_type_node;
else
type = integer_type_node;
}
else if (type == float_type_node)
type = double_type_node;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return cp_build_qualified_type (type, type_quals);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* The routines below this point are carefully written to conform to
the standard. They use the same terminology, and follow the rules
closely. Although they are used only in pt.c at the moment, they
should presumably be used everywhere in the future. */
/* Attempt to perform qualification conversions on EXPR to convert it
to TYPE. Return the resulting expression, or error_mark_node if
the conversion was impossible. */
tree
perform_qualification_conversions (type, expr)
tree type;
tree expr;
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE
&& comp_ptr_ttypes (TREE_TYPE (type), TREE_TYPE (TREE_TYPE (expr))))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return build1 (NOP_EXPR, type, expr);
else
return error_mark_node;
}
Reference in New Issue Copy Permalink