/* Build expressions with type checking for C compiler.
- Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
#include "target.h"
#include "tree-iterator.h"
#include "tree-gimple.h"
-
-/* Places where an lvalue, or modifiable lvalue, may be required.
- Used to select diagnostic messages in lvalue_or_else and
- readonly_error. */
-enum lvalue_use {
- lv_assign,
- lv_increment,
- lv_decrement,
- lv_addressof,
- lv_asm
-};
+#include "tree-flow.h"
/* Possible cases of implicit bad conversions. Used to select
diagnostic messages in convert_for_assignment. */
enum impl_conv {
ic_argpass,
+ ic_argpass_nonproto,
ic_assign,
ic_init,
ic_return
static void set_nonincremental_init (void);
static void set_nonincremental_init_from_string (tree);
static tree find_init_member (tree);
-static int lvalue_or_else (tree, enum lvalue_use);
static void readonly_error (tree, enum lvalue_use);
+static void record_maybe_used_decl (tree);
\f
/* Do `exp = require_complete_type (exp);' to make sure exp
does not have an incomplete type. (That includes void types.) */
case ARRAY_TYPE:
{
tree elt = composite_type (TREE_TYPE (t1), TREE_TYPE (t2));
-
+ int quals;
+ tree unqual_elt;
+
/* We should not have any type quals on arrays at all. */
gcc_assert (!TYPE_QUALS (t1) && !TYPE_QUALS (t2));
if (elt == TREE_TYPE (t2) && !TYPE_DOMAIN (t2) && !TYPE_DOMAIN (t1))
return build_type_attribute_variant (t2, attributes);
- /* Merge the element types, and have a size if either arg has one. */
- t1 = build_array_type (elt, TYPE_DOMAIN (TYPE_DOMAIN (t1) ? t1 : t2));
+ /* Merge the element types, and have a size if either arg has
+ one. We may have qualifiers on the element types. To set
+ up TYPE_MAIN_VARIANT correctly, we need to form the
+ composite of the unqualified types and add the qualifiers
+ back at the end. */
+ quals = TYPE_QUALS (strip_array_types (elt));
+ unqual_elt = c_build_qualified_type (elt, TYPE_UNQUALIFIED);
+ t1 = build_array_type (unqual_elt,
+ TYPE_DOMAIN (TYPE_DOMAIN (t1) ? t1 : t2));
+ t1 = c_build_qualified_type (t1, quals);
return build_type_attribute_variant (t1, attributes);
}
&& TREE_VALUE (p1) != TREE_VALUE (p2))
{
tree memb;
+ tree mv2 = TREE_VALUE (p2);
+ if (mv2 && mv2 != error_mark_node
+ && TREE_CODE (mv2) != ARRAY_TYPE)
+ mv2 = TYPE_MAIN_VARIANT (mv2);
for (memb = TYPE_FIELDS (TREE_VALUE (p1));
memb; memb = TREE_CHAIN (memb))
- if (comptypes (TREE_TYPE (memb), TREE_VALUE (p2)))
- {
- TREE_VALUE (n) = TREE_VALUE (p2);
- if (pedantic)
- pedwarn ("function types not truly compatible in ISO C");
- goto parm_done;
- }
+ {
+ tree mv3 = TREE_TYPE (memb);
+ if (mv3 && mv3 != error_mark_node
+ && TREE_CODE (mv3) != ARRAY_TYPE)
+ mv3 = TYPE_MAIN_VARIANT (mv3);
+ if (comptypes (mv3, mv2))
+ {
+ TREE_VALUE (n) = composite_type (TREE_TYPE (memb),
+ TREE_VALUE (p2));
+ if (pedantic)
+ pedwarn ("function types not truly compatible in ISO C");
+ goto parm_done;
+ }
+ }
}
if (TREE_CODE (TREE_VALUE (p2)) == UNION_TYPE
&& TREE_VALUE (p2) != TREE_VALUE (p1))
{
tree memb;
+ tree mv1 = TREE_VALUE (p1);
+ if (mv1 && mv1 != error_mark_node
+ && TREE_CODE (mv1) != ARRAY_TYPE)
+ mv1 = TYPE_MAIN_VARIANT (mv1);
for (memb = TYPE_FIELDS (TREE_VALUE (p2));
memb; memb = TREE_CHAIN (memb))
- if (comptypes (TREE_TYPE (memb), TREE_VALUE (p1)))
- {
- TREE_VALUE (n) = TREE_VALUE (p1);
- if (pedantic)
- pedwarn ("function types not truly compatible in ISO C");
- goto parm_done;
- }
+ {
+ tree mv3 = TREE_TYPE (memb);
+ if (mv3 && mv3 != error_mark_node
+ && TREE_CODE (mv3) != ARRAY_TYPE)
+ mv3 = TYPE_MAIN_VARIANT (mv3);
+ if (comptypes (mv3, mv1))
+ {
+ TREE_VALUE (n) = composite_type (TREE_TYPE (memb),
+ TREE_VALUE (p1));
+ if (pedantic)
+ pedwarn ("function types not truly compatible in ISO C");
+ goto parm_done;
+ }
+ }
}
TREE_VALUE (n) = composite_type (TREE_VALUE (p1), TREE_VALUE (p2));
parm_done: ;
common_pointer_type (tree t1, tree t2)
{
tree attributes;
- tree pointed_to_1;
- tree pointed_to_2;
+ tree pointed_to_1, mv1;
+ tree pointed_to_2, mv2;
tree target;
/* Save time if the two types are the same. */
attributes = targetm.merge_type_attributes (t1, t2);
/* Find the composite type of the target types, and combine the
- qualifiers of the two types' targets. */
- pointed_to_1 = TREE_TYPE (t1);
- pointed_to_2 = TREE_TYPE (t2);
- target = composite_type (TYPE_MAIN_VARIANT (pointed_to_1),
- TYPE_MAIN_VARIANT (pointed_to_2));
+ qualifiers of the two types' targets. Do not lose qualifiers on
+ array element types by taking the TYPE_MAIN_VARIANT. */
+ mv1 = pointed_to_1 = TREE_TYPE (t1);
+ mv2 = pointed_to_2 = TREE_TYPE (t2);
+ if (TREE_CODE (mv1) != ARRAY_TYPE)
+ mv1 = TYPE_MAIN_VARIANT (pointed_to_1);
+ if (TREE_CODE (mv2) != ARRAY_TYPE)
+ mv2 = TYPE_MAIN_VARIANT (pointed_to_2);
+ target = composite_type (mv1, mv2);
t1 = build_pointer_type (c_build_qualified_type
(target,
TYPE_QUALS (pointed_to_1) |
This is the type for the result of most arithmetic operations
if the operands have the given two types. */
-tree
-common_type (tree t1, tree t2)
+static tree
+c_common_type (tree t1, tree t2)
{
enum tree_code code1;
enum tree_code code2;
{
tree subtype1 = code1 == COMPLEX_TYPE ? TREE_TYPE (t1) : t1;
tree subtype2 = code2 == COMPLEX_TYPE ? TREE_TYPE (t2) : t2;
- tree subtype = common_type (subtype1, subtype2);
+ tree subtype = c_common_type (subtype1, subtype2);
if (code1 == COMPLEX_TYPE && TREE_TYPE (t1) == subtype)
return t1;
return t2;
}
\f
+/* Wrapper around c_common_type that is used by c-common.c. ENUMERAL_TYPEs
+ are allowed here and are converted to their compatible integer types. */
+tree
+common_type (tree t1, tree t2)
+{
+ if (TREE_CODE (t1) == ENUMERAL_TYPE)
+ t1 = c_common_type_for_size (TYPE_PRECISION (t1), 1);
+ if (TREE_CODE (t2) == ENUMERAL_TYPE)
+ t2 = c_common_type_for_size (TYPE_PRECISION (t2), 1);
+ return c_common_type (t1, t2);
+}
+\f
/* Return 1 if TYPE1 and TYPE2 are compatible types for assignment
or various other operations. Return 2 if they are compatible
but a warning may be needed if you use them together. */
definition. Note that we already checked for equality of the type
qualifiers (just above). */
- if (TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2))
+ if (TREE_CODE (t1) != ARRAY_TYPE
+ && TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2))
return 1;
/* 1 if no need for warning yet, 2 if warning cause has been seen. */
protocol qualifiers may be involved. */
if (c_dialect_objc () && (val = objc_comptypes (t1, t2, 0)) >= 0)
break;
+ /* Do not remove mode or aliasing information. */
+ if (TYPE_MODE (t1) != TYPE_MODE (t2)
+ || TYPE_REF_CAN_ALIAS_ALL (t1) != TYPE_REF_CAN_ALIAS_ALL (t2))
+ break;
val = (TREE_TYPE (t1) == TREE_TYPE (t2)
? 1 : comptypes (TREE_TYPE (t1), TREE_TYPE (t2)));
break;
comp_target_types (tree ttl, tree ttr, int reflexive)
{
int val;
+ tree mvl, mvr;
/* Give objc_comptypes a crack at letting these types through. */
if ((val = objc_comptypes (ttl, ttr, reflexive)) >= 0)
return val;
- val = comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (ttl)),
- TYPE_MAIN_VARIANT (TREE_TYPE (ttr)));
+ /* Do not lose qualifiers on element types of array types that are
+ pointer targets by taking their TYPE_MAIN_VARIANT. */
+ mvl = TREE_TYPE (ttl);
+ mvr = TREE_TYPE (ttr);
+ if (TREE_CODE (mvl) != ARRAY_TYPE)
+ mvl = TYPE_MAIN_VARIANT (mvl);
+ if (TREE_CODE (mvr) != ARRAY_TYPE)
+ mvr = TYPE_MAIN_VARIANT (mvr);
+ val = comptypes (mvl, mvr);
if (val == 2 && pedantic)
pedwarn ("types are not quite compatible");
while (1)
{
+ tree a1, mv1, a2, mv2;
if (args1 == 0 && args2 == 0)
return val;
/* If one list is shorter than the other,
they fail to match. */
if (args1 == 0 || args2 == 0)
return 0;
+ mv1 = a1 = TREE_VALUE (args1);
+ mv2 = a2 = TREE_VALUE (args2);
+ if (mv1 && mv1 != error_mark_node && TREE_CODE (mv1) != ARRAY_TYPE)
+ mv1 = TYPE_MAIN_VARIANT (mv1);
+ if (mv2 && mv2 != error_mark_node && TREE_CODE (mv2) != ARRAY_TYPE)
+ mv2 = TYPE_MAIN_VARIANT (mv2);
/* A null pointer instead of a type
means there is supposed to be an argument
but nothing is specified about what type it has.
So match anything that self-promotes. */
- if (TREE_VALUE (args1) == 0)
+ if (a1 == 0)
{
- if (c_type_promotes_to (TREE_VALUE (args2)) != TREE_VALUE (args2))
+ if (c_type_promotes_to (a2) != a2)
return 0;
}
- else if (TREE_VALUE (args2) == 0)
+ else if (a2 == 0)
{
- if (c_type_promotes_to (TREE_VALUE (args1)) != TREE_VALUE (args1))
+ if (c_type_promotes_to (a1) != a1)
return 0;
}
/* If one of the lists has an error marker, ignore this arg. */
- else if (TREE_CODE (TREE_VALUE (args1)) == ERROR_MARK
- || TREE_CODE (TREE_VALUE (args2)) == ERROR_MARK)
+ else if (TREE_CODE (a1) == ERROR_MARK
+ || TREE_CODE (a2) == ERROR_MARK)
;
- else if (!(newval = comptypes (TYPE_MAIN_VARIANT (TREE_VALUE (args1)),
- TYPE_MAIN_VARIANT (TREE_VALUE (args2)))))
+ else if (!(newval = comptypes (mv1, mv2)))
{
/* Allow wait (union {union wait *u; int *i} *)
and wait (union wait *) to be compatible. */
- if (TREE_CODE (TREE_VALUE (args1)) == UNION_TYPE
- && (TYPE_NAME (TREE_VALUE (args1)) == 0
- || TYPE_TRANSPARENT_UNION (TREE_VALUE (args1)))
- && TREE_CODE (TYPE_SIZE (TREE_VALUE (args1))) == INTEGER_CST
- && tree_int_cst_equal (TYPE_SIZE (TREE_VALUE (args1)),
- TYPE_SIZE (TREE_VALUE (args2))))
+ if (TREE_CODE (a1) == UNION_TYPE
+ && (TYPE_NAME (a1) == 0
+ || TYPE_TRANSPARENT_UNION (a1))
+ && TREE_CODE (TYPE_SIZE (a1)) == INTEGER_CST
+ && tree_int_cst_equal (TYPE_SIZE (a1),
+ TYPE_SIZE (a2)))
{
tree memb;
- for (memb = TYPE_FIELDS (TREE_VALUE (args1));
+ for (memb = TYPE_FIELDS (a1);
memb; memb = TREE_CHAIN (memb))
- if (comptypes (TREE_TYPE (memb), TREE_VALUE (args2)))
- break;
+ {
+ tree mv3 = TREE_TYPE (memb);
+ if (mv3 && mv3 != error_mark_node
+ && TREE_CODE (mv3) != ARRAY_TYPE)
+ mv3 = TYPE_MAIN_VARIANT (mv3);
+ if (comptypes (mv3, mv2))
+ break;
+ }
if (memb == 0)
return 0;
}
- else if (TREE_CODE (TREE_VALUE (args2)) == UNION_TYPE
- && (TYPE_NAME (TREE_VALUE (args2)) == 0
- || TYPE_TRANSPARENT_UNION (TREE_VALUE (args2)))
- && TREE_CODE (TYPE_SIZE (TREE_VALUE (args2))) == INTEGER_CST
- && tree_int_cst_equal (TYPE_SIZE (TREE_VALUE (args2)),
- TYPE_SIZE (TREE_VALUE (args1))))
+ else if (TREE_CODE (a2) == UNION_TYPE
+ && (TYPE_NAME (a2) == 0
+ || TYPE_TRANSPARENT_UNION (a2))
+ && TREE_CODE (TYPE_SIZE (a2)) == INTEGER_CST
+ && tree_int_cst_equal (TYPE_SIZE (a2),
+ TYPE_SIZE (a1)))
{
tree memb;
- for (memb = TYPE_FIELDS (TREE_VALUE (args2));
+ for (memb = TYPE_FIELDS (a2);
memb; memb = TREE_CHAIN (memb))
- if (comptypes (TREE_TYPE (memb), TREE_VALUE (args1)))
- break;
+ {
+ tree mv3 = TREE_TYPE (memb);
+ if (mv3 && mv3 != error_mark_node
+ && TREE_CODE (mv3) != ARRAY_TYPE)
+ mv3 = TYPE_MAIN_VARIANT (mv3);
+ if (comptypes (mv3, mv1))
+ break;
+ }
if (memb == 0)
return 0;
}
\f
/* Compute the size to increment a pointer by. */
-tree
+static tree
c_size_in_bytes (tree type)
{
enum tree_code code = TREE_CODE (type);
find the element. Otherwise, do a linear search. TYPE_LANG_SPECIFIC
will always be set for structures which have many elements. */
- if (TYPE_LANG_SPECIFIC (type))
+ if (TYPE_LANG_SPECIFIC (type) && TYPE_LANG_SPECIFIC (type)->s)
{
int bot, top, half;
tree *field_array = &TYPE_LANG_SPECIFIC (type)->s->elts[0];
else
{
tree t = TREE_TYPE (type);
- tree ref = build1 (INDIRECT_REF, TYPE_MAIN_VARIANT (t), pointer);
+ tree mvt = t;
+ tree ref;
+
+ if (TREE_CODE (mvt) != ARRAY_TYPE)
+ mvt = TYPE_MAIN_VARIANT (mvt);
+ ref = build1 (INDIRECT_REF, mvt, pointer);
if (!COMPLETE_OR_VOID_TYPE_P (t) && TREE_CODE (t) != ARRAY_TYPE)
{
tree
build_array_ref (tree array, tree index)
{
- if (index == 0)
- {
- error ("subscript missing in array reference");
- return error_mark_node;
- }
-
+ bool swapped = false;
if (TREE_TYPE (array) == error_mark_node
|| TREE_TYPE (index) == error_mark_node)
return error_mark_node;
- if (TREE_CODE (TREE_TYPE (array)) == ARRAY_TYPE)
+ if (TREE_CODE (TREE_TYPE (array)) != ARRAY_TYPE
+ && TREE_CODE (TREE_TYPE (array)) != POINTER_TYPE)
{
- tree rval, type;
-
- /* Subscripting with type char is likely to lose
- on a machine where chars are signed.
- So warn on any machine, but optionally.
- Don't warn for unsigned char since that type is safe.
- Don't warn for signed char because anyone who uses that
- must have done so deliberately. */
- if (warn_char_subscripts
- && TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node)
- warning ("array subscript has type %<char%>");
-
- /* Apply default promotions *after* noticing character types. */
- index = default_conversion (index);
-
- /* Require integer *after* promotion, for sake of enums. */
- if (TREE_CODE (TREE_TYPE (index)) != INTEGER_TYPE)
+ tree temp;
+ if (TREE_CODE (TREE_TYPE (index)) != ARRAY_TYPE
+ && TREE_CODE (TREE_TYPE (index)) != POINTER_TYPE)
{
- error ("array subscript is not an integer");
+ error ("subscripted value is neither array nor pointer");
return error_mark_node;
}
+ temp = array;
+ array = index;
+ index = temp;
+ swapped = true;
+ }
+
+ if (!INTEGRAL_TYPE_P (TREE_TYPE (index)))
+ {
+ error ("array subscript is not an integer");
+ return error_mark_node;
+ }
+
+ if (TREE_CODE (TREE_TYPE (TREE_TYPE (array))) == FUNCTION_TYPE)
+ {
+ error ("subscripted value is pointer to function");
+ return error_mark_node;
+ }
+
+ /* Subscripting with type char is likely to lose on a machine where
+ chars are signed. So warn on any machine, but optionally. Don't
+ warn for unsigned char since that type is safe. Don't warn for
+ signed char because anyone who uses that must have done so
+ deliberately. ??? Existing practice has also been to warn only
+ when the char index is syntactically the index, not for
+ char[array]. */
+ if (warn_char_subscripts && !swapped
+ && TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node)
+ warning ("array subscript has type %<char%>");
+
+ /* Apply default promotions *after* noticing character types. */
+ index = default_conversion (index);
+
+ gcc_assert (TREE_CODE (TREE_TYPE (index)) == INTEGER_TYPE);
+
+ if (TREE_CODE (TREE_TYPE (array)) == ARRAY_TYPE)
+ {
+ tree rval, type;
/* An array that is indexed by a non-constant
cannot be stored in a register; we must be able to do
pedwarn ("ISO C90 forbids subscripting non-lvalue array");
}
- type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (array)));
+ type = TREE_TYPE (TREE_TYPE (array));
+ if (TREE_CODE (type) != ARRAY_TYPE)
+ type = TYPE_MAIN_VARIANT (type);
rval = build4 (ARRAY_REF, type, array, index, NULL_TREE, NULL_TREE);
/* Array ref is const/volatile if the array elements are
or if the array is. */
| TREE_THIS_VOLATILE (array));
return require_complete_type (fold (rval));
}
+ else
+ {
+ tree ar = default_conversion (array);
- {
- tree ar = default_conversion (array);
- tree ind = default_conversion (index);
-
- /* Do the same warning check as above, but only on the part that's
- syntactically the index and only if it is also semantically
- the index. */
- if (warn_char_subscripts
- && TREE_CODE (TREE_TYPE (index)) == INTEGER_TYPE
- && TYPE_MAIN_VARIANT (TREE_TYPE (index)) == char_type_node)
- warning ("subscript has type %<char%>");
-
- /* Put the integer in IND to simplify error checking. */
- if (TREE_CODE (TREE_TYPE (ar)) == INTEGER_TYPE)
- {
- tree temp = ar;
- ar = ind;
- ind = temp;
- }
-
- if (ar == error_mark_node)
- return ar;
+ if (ar == error_mark_node)
+ return ar;
- if (TREE_CODE (TREE_TYPE (ar)) != POINTER_TYPE
- || TREE_CODE (TREE_TYPE (TREE_TYPE (ar))) == FUNCTION_TYPE)
- {
- error ("subscripted value is neither array nor pointer");
- return error_mark_node;
- }
- if (TREE_CODE (TREE_TYPE (ind)) != INTEGER_TYPE)
- {
- error ("array subscript is not an integer");
- return error_mark_node;
- }
+ gcc_assert (TREE_CODE (TREE_TYPE (ar)) == POINTER_TYPE);
+ gcc_assert (TREE_CODE (TREE_TYPE (TREE_TYPE (ar))) != FUNCTION_TYPE);
- return build_indirect_ref (build_binary_op (PLUS_EXPR, ar, ind, 0),
- "array indexing");
- }
+ return build_indirect_ref (build_binary_op (PLUS_EXPR, ar, index, 0),
+ "array indexing");
+ }
}
\f
/* Build an external reference to identifier ID. FUN indicates
- whether this will be used for a function call. */
+ whether this will be used for a function call. LOC is the source
+ location of the identifier. */
tree
-build_external_ref (tree id, int fun)
+build_external_ref (tree id, int fun, location_t loc)
{
tree ref;
tree decl = lookup_name (id);
- tree objc_ivar = objc_lookup_ivar (id);
+
+ /* In Objective-C, an instance variable (ivar) may be preferred to
+ whatever lookup_name() found. */
+ decl = objc_lookup_ivar (decl, id);
if (decl && decl != error_mark_node)
- {
- /* Properly declared variable or function reference. */
- if (!objc_ivar)
- ref = decl;
- else if (decl != objc_ivar && !DECL_FILE_SCOPE_P (decl))
- {
- warning ("local declaration of %qs hides instance variable",
- IDENTIFIER_POINTER (id));
- ref = decl;
- }
- else
- ref = objc_ivar;
- }
- else if (objc_ivar)
- ref = objc_ivar;
+ ref = decl;
else if (fun)
/* Implicit function declaration. */
ref = implicitly_declare (id);
return error_mark_node;
else
{
- undeclared_variable (id);
+ undeclared_variable (id, loc);
return error_mark_node;
}
a VLA type or the operand of typeof is a variably modified
type. */
-void
+static void
record_maybe_used_decl (tree decl)
{
struct maybe_used_decl *t = XOBNEW (&parser_obstack, struct maybe_used_decl);
coerced_params
= convert_arguments (TYPE_ARG_TYPES (fntype), params, function, fundecl);
+ if (coerced_params == error_mark_node)
+ return error_mark_node;
+
/* Check that the arguments to the function are valid. */
check_function_arguments (TYPE_ATTRIBUTES (fntype), coerced_params);
\f
/* Convert the argument expressions in the list VALUES
to the types in the list TYPELIST. The result is a list of converted
- argument expressions.
+ argument expressions, unless there are too few arguments in which
+ case it is error_mark_node.
If TYPELIST is exhausted, or when an element has NULL as its type,
perform the default conversions.
/* Formal parm type is specified by a function prototype. */
tree parmval;
- if (!COMPLETE_TYPE_P (type))
+ if (type == error_mark_node || !COMPLETE_TYPE_P (type))
{
error ("type of formal parameter %d is incomplete", parmnum + 1);
parmval = val;
}
if (typetail != 0 && TREE_VALUE (typetail) != void_type_node)
- error ("too few arguments to function %qE", function);
+ {
+ error ("too few arguments to function %qE", function);
+ return error_mark_node;
+ }
return nreverse (result);
}
if (!c_mark_addressable (arg))
return error_mark_node;
- if (TREE_CODE (arg) == COMPONENT_REF
- && DECL_C_BIT_FIELD (TREE_OPERAND (arg, 1)))
- {
- error ("attempt to take address of bit-field structure member %qD",
- TREE_OPERAND (arg, 1));
- return error_mark_node;
- }
+ gcc_assert (TREE_CODE (arg) != COMPONENT_REF
+ || !DECL_C_BIT_FIELD (TREE_OPERAND (arg, 1)));
argtype = build_pointer_type (argtype);
return 0;
}
}
-
-/* Return nonzero if REF is an lvalue valid for this language;
- otherwise, print an error message and return zero. USE says
- how the lvalue is being used and so selects the error message. */
-
-static int
-lvalue_or_else (tree ref, enum lvalue_use use)
-{
- int win = lvalue_p (ref);
-
- if (!win)
- {
- switch (use)
- {
- case lv_assign:
- error ("invalid lvalue in assignment");
- break;
- case lv_increment:
- error ("invalid lvalue in increment");
- break;
- case lv_decrement:
- error ("invalid lvalue in decrement");
- break;
- case lv_addressof:
- error ("invalid lvalue in unary %<&%>");
- break;
- case lv_asm:
- error ("invalid lvalue in asm statement");
- break;
- default:
- gcc_unreachable ();
- }
- }
-
- return win;
-}
-
\f
/* Give an error for storing in something that is 'const'. */
case COMPONENT_REF:
if (DECL_C_BIT_FIELD (TREE_OPERAND (x, 1)))
{
- error ("cannot take address of bit-field %qs",
- IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (x, 1))));
+ error
+ ("cannot take address of bit-field %qD", TREE_OPERAND (x, 1));
return false;
}
{
if (TREE_PUBLIC (x) || TREE_STATIC (x) || DECL_EXTERNAL (x))
{
- error ("global register variable %qs used in nested function",
- IDENTIFIER_POINTER (DECL_NAME (x)));
+ error
+ ("global register variable %qD used in nested function", x);
return false;
}
- pedwarn ("register variable %qs used in nested function",
- IDENTIFIER_POINTER (DECL_NAME (x)));
+ pedwarn ("register variable %qD used in nested function", x);
}
else if (C_DECL_REGISTER (x))
{
if (TREE_PUBLIC (x) || TREE_STATIC (x) || DECL_EXTERNAL (x))
- {
- error ("address of global register variable %qs requested",
- IDENTIFIER_POINTER (DECL_NAME (x)));
- return false;
- }
-
- pedwarn ("address of register variable %qs requested",
- IDENTIFIER_POINTER (DECL_NAME (x)));
+ error ("address of global register variable %qD requested", x);
+ else
+ error ("address of register variable %qD requested", x);
+ return false;
}
/* drops in */
&& (code2 == INTEGER_TYPE || code2 == REAL_TYPE
|| code2 == COMPLEX_TYPE))
{
- result_type = common_type (type1, type2);
+ result_type = c_common_type (type1, type2);
/* If -Wsign-compare, warn here if type1 and type2 have
different signedness. We'll promote the signed to unsigned
/* Convert arrays and functions to pointers. */
expr2 = default_function_array_conversion (expr2);
- /* Don't let (0, 0) be null pointer constant. */
- if (integer_zerop (expr2))
- expr2 = non_lvalue (expr2);
-
if (!TREE_SIDE_EFFECTS (expr1))
{
/* The left-hand operand of a comma expression is like an expression
pedwarn ("ISO C forbids conversion of object pointer to function pointer type");
ovalue = value;
- /* Replace a nonvolatile const static variable with its value. */
- if (optimize && TREE_CODE (value) == VAR_DECL)
- value = decl_constant_value (value);
value = convert (type, value);
/* Ignore any integer overflow caused by the cast. */
}
}
- /* Don't let (void *) (FOO *) 0 be a null pointer constant. */
- if (TREE_CODE (value) == INTEGER_CST
- && TREE_CODE (expr) == INTEGER_CST
- && TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE)
- value = non_lvalue (value);
-
/* Don't let a cast be an lvalue. */
if (value == expr)
value = non_lvalue (value);
enum tree_code coder;
tree rname = NULL_TREE;
- if (errtype == ic_argpass)
+ if (errtype == ic_argpass || errtype == ic_argpass_nonproto)
{
tree selector;
/* Change pointer to function to the function itself for
case ic_argpass: \
pedwarn (AR, parmnum, rname); \
break; \
+ case ic_argpass_nonproto: \
+ warning (AR, parmnum, rname); \
+ break; \
case ic_assign: \
pedwarn (AS); \
break; \
if (coder == VOID_TYPE)
{
+ /* Except for passing an argument to an unprototyped function,
+ this is a constraint violation. When passing an argument to
+ an unprototyped function, it is compile-time undefined;
+ making it a constraint in that case was rejected in
+ DR#252. */
error ("void value not ignored as it ought to be");
return error_mark_node;
}
/* Conversion to a transparent union from its member types.
This applies only to function arguments. */
else if (codel == UNION_TYPE && TYPE_TRANSPARENT_UNION (type)
- && errtype == ic_argpass)
+ && (errtype == ic_argpass || errtype == ic_argpass_nonproto))
{
tree memb_types;
tree marginal_memb_type = 0;
{
tree ttl = TREE_TYPE (type);
tree ttr = TREE_TYPE (rhstype);
+ tree mvl = ttl;
+ tree mvr = ttr;
bool is_opaque_pointer;
int target_cmp = 0; /* Cache comp_target_types () result. */
+ if (TREE_CODE (mvl) != ARRAY_TYPE)
+ mvl = TYPE_MAIN_VARIANT (mvl);
+ if (TREE_CODE (mvr) != ARRAY_TYPE)
+ mvr = TYPE_MAIN_VARIANT (mvr);
/* Opaque pointers are treated like void pointers. */
is_opaque_pointer = (targetm.vector_opaque_p (type)
|| targetm.vector_opaque_p (rhstype))
if (VOID_TYPE_P (ttl) || VOID_TYPE_P (ttr)
|| (target_cmp = comp_target_types (type, rhstype, 0))
|| is_opaque_pointer
- || (c_common_unsigned_type (TYPE_MAIN_VARIANT (ttl))
- == c_common_unsigned_type (TYPE_MAIN_VARIANT (ttr))))
+ || (c_common_unsigned_type (mvl)
+ == c_common_unsigned_type (mvr)))
{
if (pedantic
&& ((VOID_TYPE_P (ttl) && TREE_CODE (ttr) == FUNCTION_TYPE)
|| target_cmp)
;
/* If there is a mismatch, do warn. */
- else
+ else if (warn_pointer_sign)
WARN_FOR_ASSIGNMENT (N_("pointer targets in passing argument "
"%d of %qE differ in signedness"),
N_("pointer targets in assignment "
}
else if (codel == POINTER_TYPE && coder == ARRAY_TYPE)
{
+ /* ??? This should not be an error when inlining calls to
+ unprototyped functions. */
error ("invalid use of non-lvalue array");
return error_mark_node;
}
switch (errtype)
{
case ic_argpass:
+ case ic_argpass_nonproto:
+ /* ??? This should not be an error when inlining calls to
+ unprototyped functions. */
error ("incompatible type for argument %d of %qE", parmnum, rname);
break;
case ic_assign:
type = TREE_TYPE (parm);
ret = convert_for_assignment (type, value,
- ic_argpass, fn,
+ ic_argpass_nonproto, fn,
fn, argnum);
if (targetm.calls.promote_prototypes (TREE_TYPE (fn))
&& INTEGRAL_TYPE_P (type)
/* Build a VECTOR_CST from a *constant* vector constructor. If the
vector constructor is not constant (e.g. {1,2,3,foo()}) then punt
below and handle as a constructor. */
- if (code == VECTOR_TYPE
- && TREE_CODE (TREE_TYPE (inside_init)) == VECTOR_TYPE
- && vector_types_convertible_p (TREE_TYPE (inside_init), type)
- && TREE_CONSTANT (inside_init))
- {
- if (TREE_CODE (inside_init) == VECTOR_CST
- && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)),
- TYPE_MAIN_VARIANT (type)))
- return inside_init;
- else
- return build_vector (type, CONSTRUCTOR_ELTS (inside_init));
- }
+ if (code == VECTOR_TYPE
+ && TREE_CODE (TREE_TYPE (inside_init)) == VECTOR_TYPE
+ && vector_types_convertible_p (TREE_TYPE (inside_init), type)
+ && TREE_CONSTANT (inside_init))
+ {
+ if (TREE_CODE (inside_init) == VECTOR_CST
+ && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)),
+ TYPE_MAIN_VARIANT (type)))
+ return inside_init;
+
+ if (TREE_CODE (inside_init) == CONSTRUCTOR)
+ {
+ tree link;
+
+ /* Iterate through elements and check if all constructor
+ elements are *_CSTs. */
+ for (link = CONSTRUCTOR_ELTS (inside_init);
+ link;
+ link = TREE_CHAIN (link))
+ if (! CONSTANT_CLASS_P (TREE_VALUE (link)))
+ break;
+
+ if (link == NULL)
+ return build_vector (type, CONSTRUCTOR_ELTS (inside_init));
+ }
+ }
/* Any type can be initialized
from an expression of the same type, optionally with braces. */
/* The SPELLING_DEPTH of this constructor. */
static int constructor_depth;
-/* 0 if implicitly pushing constructor levels is allowed. */
-int constructor_no_implicit = 0; /* 0 for C; 1 for some other languages. */
-
/* DECL node for which an initializer is being read.
0 means we are reading a constructor expression
such as (struct foo) {...}. */
constructor_designated = 0;
constructor_top_level = top_level;
- if (decl != 0)
+ if (decl != 0 && decl != error_mark_node)
{
require_constant_value = TREE_STATIC (decl);
require_constant_elements
TYPE_MIN_VALUE (TYPE_DOMAIN (constructor_type)));
}
else
- constructor_index = bitsize_zero_node;
+ {
+ constructor_index = bitsize_zero_node;
+ constructor_max_index = NULL_TREE;
+ }
constructor_unfilled_index = constructor_index;
}
}
else
{
- warning_init ("braces around scalar initializer");
+ if (constructor_type != error_mark_node)
+ warning_init ("braces around scalar initializer");
constructor_fields = constructor_type;
constructor_unfilled_fields = constructor_type;
}
return 0;
}
- if (constructor_no_implicit)
- {
- error_init ("initialization designators may not nest");
- return 1;
- }
-
switch (TREE_CODE (constructor_type))
{
case RECORD_TYPE:
output_init_element (tree value, bool strict_string, tree type, tree field,
int pending)
{
- if (type == error_mark_node)
+ if (type == error_mark_node || value == error_mark_node)
{
constructor_erroneous = 1;
return;
value.value = orig_value;
/* Otherwise, if we have come to a subaggregate,
and we don't have an element of its type, push into it. */
- else if (value.value != 0 && !constructor_no_implicit
+ else if (value.value != 0
&& value.value != error_mark_node
&& TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != fieldtype
&& (fieldcode == RECORD_TYPE || fieldcode == ARRAY_TYPE
value.value = orig_value;
/* Otherwise, if we have come to a subaggregate,
and we don't have an element of its type, push into it. */
- else if (value.value != 0 && !constructor_no_implicit
+ else if (value.value != 0
&& value.value != error_mark_node
&& TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != fieldtype
&& (fieldcode == RECORD_TYPE || fieldcode == ARRAY_TYPE
value.value = orig_value;
/* Otherwise, if we have come to a subaggregate,
and we don't have an element of its type, push into it. */
- else if (value.value != 0 && !constructor_no_implicit
+ else if (value.value != 0
&& value.value != error_mark_node
&& TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != elttype
&& (eltcode == RECORD_TYPE || eltcode == ARRAY_TYPE
/* Handle the sole element allowed in a braced initializer
for a scalar variable. */
- else if (constructor_fields == 0)
+ else if (constructor_type != error_mark_node
+ && constructor_fields == 0)
{
pedwarn_init ("excess elements in scalar initializer");
break;
tree args;
int i;
const char *constraint;
+ const char **oconstraints;
bool allows_mem, allows_reg, is_inout;
- int ninputs;
- int noutputs;
+ int ninputs, noutputs;
ninputs = list_length (inputs);
noutputs = list_length (outputs);
+ oconstraints = (const char **) alloca (noutputs * sizeof (const char *));
+
+ string = resolve_asm_operand_names (string, outputs, inputs);
/* Remove output conversions that change the type but not the mode. */
for (i = 0, tail = outputs; tail; ++i, tail = TREE_CHAIN (tail))
{
tree output = TREE_VALUE (tail);
+
+ /* ??? Really, this should not be here. Users should be using a
+ proper lvalue, dammit. But there's a long history of using casts
+ in the output operands. In cases like longlong.h, this becomes a
+ primitive form of typechecking -- if the cast can be removed, then
+ the output operand had a type of the proper width; otherwise we'll
+ get an error. Gross, but ... */
STRIP_NOPS (output);
- TREE_VALUE (tail) = output;
- lvalue_or_else (output, lv_asm);
+
+ if (!lvalue_or_else (output, lv_asm))
+ output = error_mark_node;
constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail)));
+ oconstraints[i] = constraint;
- if (!parse_output_constraint (&constraint, i, ninputs, noutputs,
- &allows_mem, &allows_reg, &is_inout))
- {
- /* By marking this operand as erroneous, we will not try
- to process this operand again in expand_asm_operands. */
- TREE_VALUE (tail) = error_mark_node;
- continue;
- }
+ if (parse_output_constraint (&constraint, i, ninputs, noutputs,
+ &allows_mem, &allows_reg, &is_inout))
+ {
+ /* If the operand is going to end up in memory,
+ mark it addressable. */
+ if (!allows_reg && !c_mark_addressable (output))
+ output = error_mark_node;
+ }
+ else
+ output = error_mark_node;
- /* If the operand is a DECL that is going to end up in
- memory, assume it is addressable. This is a bit more
- conservative than it would ideally be; the exact test is
- buried deep in expand_asm_operands and depends on the
- DECL_RTL for the OPERAND -- which we don't have at this
- point. */
- if (!allows_reg && DECL_P (output))
- c_mark_addressable (output);
+ TREE_VALUE (tail) = output;
}
/* Perform default conversions on array and function inputs.
Don't do this for other types as it would screw up operands
expected to be in memory. */
- for (tail = inputs; tail; tail = TREE_CHAIN (tail))
- TREE_VALUE (tail) = default_function_array_conversion (TREE_VALUE (tail));
+ for (i = 0, tail = inputs; tail; ++i, tail = TREE_CHAIN (tail))
+ {
+ tree input;
+
+ constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail)));
+ input = TREE_VALUE (tail);
+
+ input = default_function_array_conversion (input);
+
+ if (parse_input_constraint (&constraint, i, ninputs, noutputs, 0,
+ oconstraints, &allows_mem, &allows_reg))
+ {
+ /* If the operand is going to end up in memory,
+ mark it addressable. */
+ if (!allows_reg && allows_mem)
+ {
+ /* Strip the nops as we allow this case. FIXME, this really
+ should be rejected or made deprecated. */
+ STRIP_NOPS (input);
+ if (!c_mark_addressable (input))
+ input = error_mark_node;
+ }
+ }
+ else
+ input = error_mark_node;
+
+ TREE_VALUE (tail) = input;
+ }
args = build_stmt (ASM_EXPR, string, outputs, inputs, clobbers);
ASM_VOLATILE_P (args) = 1;
ASM_INPUT_P (args) = 1;
}
+
return args;
}
\f
{
error ("switch quantity not an integer");
exp = integer_zero_node;
+ orig_type = error_mark_node;
}
else
{
/* Add this new SWITCH_STMT to the stack. */
cs = XNEW (struct c_switch);
- cs->switch_stmt = build_stmt ((enum tree_code) SWITCH_STMT, exp, NULL_TREE,
- orig_type);
+ cs->switch_stmt = build_stmt (SWITCH_STMT, exp, NULL_TREE, orig_type);
cs->orig_type = orig_type;
cs->cases = splay_tree_new (case_compare, NULL, NULL);
cs->next = c_switch_stack;
if (c_switch_stack)
{
label = c_add_case_label (c_switch_stack->cases,
- SWITCH_COND (c_switch_stack->switch_stmt),
+ SWITCH_STMT_COND (c_switch_stack->switch_stmt),
c_switch_stack->orig_type,
low_value, high_value);
if (label == error_mark_node)
{
struct c_switch *cs = c_switch_stack;
- SWITCH_BODY (cs->switch_stmt) = body;
+ SWITCH_STMT_BODY (cs->switch_stmt) = body;
/* Emit warnings as needed. */
c_do_switch_warnings (cs->cases, cs->switch_stmt);
{
tree entry = NULL, exit = NULL, t;
- /* Detect do { ... } while (0) and don't generate loop construct. */
- if (cond && !cond_is_first && integer_zerop (cond))
- cond = NULL;
- if (cond_is_first || cond)
+ /* If the condition is zero don't generate a loop construct. */
+ if (cond && integer_zerop (cond))
+ {
+ if (cond_is_first)
+ {
+ t = build_and_jump (&blab);
+ SET_EXPR_LOCATION (t, start_locus);
+ add_stmt (t);
+ }
+ }
+ else
{
tree top = build1 (LABEL_EXPR, void_type_node, NULL_TREE);
then we just build a jump back to the top. */
exit = build_and_jump (&LABEL_EXPR_LABEL (top));
- if (cond)
+ if (cond && !integer_nonzerop (cond))
{
/* Canonicalize the loop condition to the end. This means
generating a branch to the loop condition. Reuse the
tree
c_finish_bc_stmt (tree *label_p, bool is_break)
{
+ bool skip;
tree label = *label_p;
+ /* In switch statements break is sometimes stylistically used after
+ a return statement. This can lead to spurious warnings about
+ control reaching the end of a non-void function when it is
+ inlined. Note that we are calling block_may_fallthru with
+ language specific tree nodes; this works because
+ block_may_fallthru returns true when given something it does not
+ understand. */
+ skip = !block_may_fallthru (cur_stmt_list);
+
if (!label)
- *label_p = label = create_artificial_label ();
+ {
+ if (!skip)
+ *label_p = label = create_artificial_label ();
+ }
else if (TREE_CODE (label) != LABEL_DECL)
{
if (is_break)
return NULL_TREE;
}
+ if (skip)
+ return NULL_TREE;
+
return add_stmt (build1 (GOTO_EXPR, void_type_node, label));
}
}
break;
- case RROTATE_EXPR:
- case LROTATE_EXPR:
- if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE)
- {
- if (TREE_CODE (op1) == INTEGER_CST && skip_evaluation == 0)
- {
- if (tree_int_cst_sgn (op1) < 0)
- warning ("shift count is negative");
- else if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0)
- warning ("shift count >= width of type");
- }
-
- /* Use the type of the value to be shifted. */
- result_type = type0;
- /* Convert the shift-count to an integer, regardless of size
- of value being shifted. */
- if (TYPE_MAIN_VARIANT (TREE_TYPE (op1)) != integer_type_node)
- op1 = convert (integer_type_node, op1);
- /* Avoid converting op1 to result_type later. */
- converted = 1;
- }
- break;
-
case EQ_EXPR:
case NE_EXPR:
if (warn_float_equal && (code0 == REAL_TYPE || code1 == REAL_TYPE))
}
break;
- case MAX_EXPR:
- case MIN_EXPR:
- if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE)
- && (code1 == INTEGER_TYPE || code1 == REAL_TYPE))
- shorten = 1;
- else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE)
- {
- if (comp_target_types (type0, type1, 1))
- {
- result_type = common_pointer_type (type0, type1);
- if (pedantic
- && TREE_CODE (TREE_TYPE (type0)) == FUNCTION_TYPE)
- pedwarn ("ISO C forbids ordered comparisons of pointers to functions");
- }
- else
- {
- result_type = ptr_type_node;
- pedwarn ("comparison of distinct pointer types lacks a cast");
- }
- }
- break;
-
case LE_EXPR:
case GE_EXPR:
case LT_EXPR:
}
break;
- case UNORDERED_EXPR:
- case ORDERED_EXPR:
- case UNLT_EXPR:
- case UNLE_EXPR:
- case UNGT_EXPR:
- case UNGE_EXPR:
- case UNEQ_EXPR:
- case LTGT_EXPR:
- build_type = integer_type_node;
- if (code0 != REAL_TYPE || code1 != REAL_TYPE)
- {
- error ("unordered comparison on non-floating point argument");
- return error_mark_node;
- }
- common = 1;
- break;
-
default:
- break;
+ gcc_unreachable ();
}
if (code0 == ERROR_MARK || code1 == ERROR_MARK)
int none_complex = (code0 != COMPLEX_TYPE && code1 != COMPLEX_TYPE);
if (shorten || common || short_compare)
- result_type = common_type (type0, type1);
+ result_type = c_common_type (type0, type1);
/* For certain operations (which identify themselves by shorten != 0)
if both args were extended from the same smaller type,
&& (unsigned0 || !uns))
result_type
= c_common_signed_or_unsigned_type
- (unsigned0, common_type (TREE_TYPE (arg0), TREE_TYPE (arg1)));
+ (unsigned0, c_common_type (TREE_TYPE (arg0), TREE_TYPE (arg1)));
else if (TREE_CODE (arg0) == INTEGER_CST
&& (unsigned1 || !uns)
&& (TYPE_PRECISION (TREE_TYPE (arg1))
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