/* Language-independent node constructors for parse phase of GNU compiler.
- Copyright (C) 1987, 88, 92, 93, 94, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1987, 88, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
This file is part of GNU CC.
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
/* This file contains the low level primitives for operating on tree nodes,
#include "config.h"
#include "flags.h"
#include "tree.h"
+#include "except.h"
#include "function.h"
#include "obstack.h"
#ifdef __STDC__
p->all_types_permanent = all_types_permanent;
p->momentary_stack = momentary_stack;
p->maybepermanent_firstobj = maybepermanent_firstobj;
+ p->temporary_firstobj = temporary_firstobj;
p->momentary_firstobj = momentary_firstobj;
p->momentary_function_firstobj = momentary_function_firstobj;
p->function_obstack = function_obstack;
expression_obstack = &permanent_obstack;
rtl_obstack = saveable_obstack = &permanent_obstack;
+ temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
momentary_firstobj = (char *) obstack_finish (&momentary_obstack);
momentary_function_firstobj = momentary_firstobj;
}
obstack_free (function_obstack, 0);
free (function_obstack);
+ temporary_firstobj = p->temporary_firstobj;
momentary_firstobj = p->momentary_firstobj;
momentary_function_firstobj = p->momentary_function_firstobj;
maybepermanent_firstobj = p->maybepermanent_firstobj;
obstack_name = "temp_decl_obstack";
}
- /* Check to see if the object is in the free area of the obstack. */
+ /* Check to see if the object is in the free area of the obstack. */
if (obstack != NULL)
{
if (object >= obstack->next_free
/* PARM_DECLs go on the context of the parent. If this is a nested
function, then we must allocate the PARM_DECL on the parent's
obstack, so that they will live to the end of the parent's
- closing brace. This is neccesary in case we try to inline the
+ closing brace. This is necessary in case we try to inline the
function into its parent.
PARM_DECLs of top-level functions do not have this problem. However,
- we allocate them where we put the FUNCTION_DECL for languauges such as
+ we allocate them where we put the FUNCTION_DECL for languages such as
Ada that need to consult some flags in the PARM_DECLs of the function
when calling it.
for REAL_CST, since the number of words is machine-dependent due
to varying size and alignment of `double'. */
if (code == INTEGER_CST)
- {
- length = sizeof (struct tree_int_cst);
- break;
- }
+ length = sizeof (struct tree_int_cst);
else if (code == REAL_CST)
- {
- length = sizeof (struct tree_real_cst);
- break;
- }
+ length = sizeof (struct tree_real_cst);
+ else
+ length = (sizeof (struct tree_common)
+ + tree_code_length[(int) code] * sizeof (char *));
+ break;
case 'x': /* something random, like an identifier. */
length = sizeof (struct tree_common)
{
TYPE_UID (t) = next_type_uid++;
TYPE_OBSTACK (t) = current_obstack;
+
+ /* The following is so that the debug code for
+ the copy is different from the original type.
+ The two statements usually duplicate each other
+ (because they clear fields of the same union),
+ but the optimizer should catch that. */
+ TYPE_SYMTAB_POINTER (t) = 0;
+ TYPE_SYMTAB_ADDRESS (t) = 0;
}
TREE_PERMANENT (t) = (current_obstack == &permanent_obstack);
hash_len = id_clash_len;
/* Compute hash code */
- hi = hash_len * 613 + (unsigned)text[0];
+ hi = hash_len * 613 + (unsigned) text[0];
for (i = 1; i < hash_len; i += 2)
- hi = ((hi * 613) + (unsigned)(text[i]));
+ hi = ((hi * 613) + (unsigned) (text[i]));
hi &= (1 << HASHBITS) - 1;
hi %= MAX_HASH_TABLE;
#if !defined (REAL_IS_NOT_DOUBLE) || defined (REAL_ARITHMETIC)
REAL_VALUE_TYPE
-real_value_from_int_cst (i)
- tree i;
+real_value_from_int_cst (type, i)
+ tree type, i;
{
REAL_VALUE_TYPE d;
REAL_VALUE_TYPE e;
#ifdef REAL_ARITHMETIC
if (! TREE_UNSIGNED (TREE_TYPE (i)))
- REAL_VALUE_FROM_INT (d, TREE_INT_CST_LOW (i), TREE_INT_CST_HIGH (i));
+ REAL_VALUE_FROM_INT (d, TREE_INT_CST_LOW (i), TREE_INT_CST_HIGH (i),
+ TYPE_MODE (type));
else
- REAL_VALUE_FROM_UNSIGNED_INT (d, TREE_INT_CST_LOW (i), TREE_INT_CST_HIGH (i));
+ REAL_VALUE_FROM_UNSIGNED_INT (d, TREE_INT_CST_LOW (i),
+ TREE_INT_CST_HIGH (i), TYPE_MODE (type));
#else /* not REAL_ARITHMETIC */
if (TREE_INT_CST_HIGH (i) < 0 && ! TREE_UNSIGNED (TREE_TYPE (i)))
{
set_float_handler (float_error);
- d = REAL_VALUE_TRUNCATE (TYPE_MODE (type), real_value_from_int_cst (i));
+#ifdef REAL_ARITHMETIC
+ d = real_value_from_int_cst (type, i);
+#else
+ d = REAL_VALUE_TRUNCATE (TYPE_MODE (type),
+ real_value_from_int_cst (type, i));
+#endif
/* Check for valid float value for this type on this target machine. */
/* Return a newly constructed COMPLEX_CST node whose value is
specified by the real and imaginary parts REAL and IMAG.
- Both REAL and IMAG should be constant nodes.
- The TREE_TYPE is not initialized. */
+ Both REAL and IMAG should be constant nodes. TYPE, if specified,
+ will be the type of the COMPLEX_CST; otherwise a new type will be made. */
tree
-build_complex (real, imag)
+build_complex (type, real, imag)
+ tree type;
tree real, imag;
{
register tree t = make_node (COMPLEX_CST);
TREE_REALPART (t) = real;
TREE_IMAGPART (t) = imag;
- TREE_TYPE (t) = build_complex_type (TREE_TYPE (real));
+ TREE_TYPE (t) = type ? type : build_complex_type (TREE_TYPE (real));
TREE_OVERFLOW (t) = TREE_OVERFLOW (real) | TREE_OVERFLOW (imag);
TREE_CONSTANT_OVERFLOW (t)
= TREE_CONSTANT_OVERFLOW (real) | TREE_CONSTANT_OVERFLOW (imag);
}
/* Build a newly constructed TREE_VEC node of length LEN. */
+
tree
make_tree_vec (len)
int len;
STRIP_NOPS (expr);
return ((TREE_CODE (expr) == INTEGER_CST
+ && ! TREE_CONSTANT_OVERFLOW (expr)
&& TREE_INT_CST_LOW (expr) == 0
&& TREE_INT_CST_HIGH (expr) == 0)
|| (TREE_CODE (expr) == COMPLEX_CST
STRIP_NOPS (expr);
return ((TREE_CODE (expr) == INTEGER_CST
+ && ! TREE_CONSTANT_OVERFLOW (expr)
&& TREE_INT_CST_LOW (expr) == 1
&& TREE_INT_CST_HIGH (expr) == 0)
|| (TREE_CODE (expr) == COMPLEX_CST
&& integer_zerop (TREE_IMAGPART (expr)))
return 1;
- else if (TREE_CODE (expr) != INTEGER_CST)
+ else if (TREE_CODE (expr) != INTEGER_CST
+ || TREE_CONSTANT_OVERFLOW (expr))
return 0;
uns = TREE_UNSIGNED (TREE_TYPE (expr));
&& integer_zerop (TREE_IMAGPART (expr)))
return 1;
- if (TREE_CODE (expr) != INTEGER_CST)
+ if (TREE_CODE (expr) != INTEGER_CST || TREE_CONSTANT_OVERFLOW (expr))
return 0;
high = TREE_INT_CST_HIGH (expr);
STRIP_NOPS (expr);
return ((TREE_CODE (expr) == REAL_CST
+ && ! TREE_CONSTANT_OVERFLOW (expr)
&& REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst0))
|| (TREE_CODE (expr) == COMPLEX_CST
&& real_zerop (TREE_REALPART (expr))
STRIP_NOPS (expr);
return ((TREE_CODE (expr) == REAL_CST
+ && ! TREE_CONSTANT_OVERFLOW (expr)
&& REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst1))
|| (TREE_CODE (expr) == COMPLEX_CST
&& real_onep (TREE_REALPART (expr))
STRIP_NOPS (expr);
return ((TREE_CODE (expr) == REAL_CST
+ && ! TREE_CONSTANT_OVERFLOW (expr)
&& REAL_VALUES_EQUAL (TREE_REAL_CST (expr), dconst2))
|| (TREE_CODE (expr) == COMPLEX_CST
&& real_twop (TREE_REALPART (expr))
return NULL_TREE;
}
-/* Return nonzero if ELEM is part of the chain CHAIN. */
+/* Return nonzero if ELEM is part of the chain CHAIN. */
int
chain_member (elem, chain)
}
/* Return nonzero if ELEM is equal to TREE_VALUE (CHAIN) for any piece of
- chain CHAIN. */
+ chain CHAIN. */
/* ??? This function was added for machine specific attributes but is no
longer used. It could be deleted if we could confirm all front ends
don't use it. */
}
/* Return nonzero if ELEM is equal to TREE_PURPOSE (CHAIN)
- for any piece of chain CHAIN. */
+ for any piece of chain CHAIN. */
/* ??? This function was added for machine specific attributes but is no
longer used. It could be deleted if we could confirm all front ends
don't use it. */
case FUNCTION_DECL:
/* Nested functions aren't static, since taking their address
involves a trampoline. */
- return decl_function_context (arg) == 0;
+ return decl_function_context (arg) == 0 || DECL_NO_STATIC_CHAIN (arg);
case VAR_DECL:
return TREE_STATIC (arg) || DECL_EXTERNAL (arg);
case BIT_FIELD_REF:
return staticp (TREE_OPERAND (arg, 0));
+#if 0
+ /* This case is technically correct, but results in setting
+ TREE_CONSTANT on ADDR_EXPRs that cannot be evaluated at
+ compile time. */
case INDIRECT_REF:
return TREE_CONSTANT (TREE_OPERAND (arg, 0));
+#endif
case ARRAY_REF:
if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg))) == INTEGER_CST
fact (i.e. this allows further folding, and direct checks for constants).
However, a read-only object that has side effects cannot be bypassed.
Since it is no problem to reevaluate literals, we just return the
- literal node. */
+ literal node. */
if (TREE_CONSTANT (t) || (TREE_READONLY (t) && ! TREE_SIDE_EFFECTS (t))
- || TREE_CODE (t) == SAVE_EXPR)
+ || TREE_CODE (t) == SAVE_EXPR || TREE_CODE (t) == ERROR_MARK)
return t;
/* If T contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
TREE_SIDE_EFFECTS (t) = 1;
return t;
}
+
+/* Arrange for an expression to be expanded multiple independent
+ times. This is useful for cleanup actions, as the backend can
+ expand them multiple times in different places. */
+
+tree
+unsave_expr (expr)
+ tree expr;
+{
+ tree t;
+
+ /* If this is already protected, no sense in protecting it again. */
+ if (TREE_CODE (expr) == UNSAVE_EXPR)
+ return expr;
+
+ t = build1 (UNSAVE_EXPR, TREE_TYPE (expr), expr);
+ TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (expr);
+ return t;
+}
+
+/* Modify a tree in place so that all the evaluate only once things
+ are cleared out. Return the EXPR given. */
+
+tree
+unsave_expr_now (expr)
+ tree expr;
+{
+ enum tree_code code;
+ register int i;
+
+ if (expr == NULL_TREE)
+ return expr;
+
+ code = TREE_CODE (expr);
+ switch (code)
+ {
+ case SAVE_EXPR:
+ SAVE_EXPR_RTL (expr) = 0;
+ break;
+
+ case TARGET_EXPR:
+ TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
+ TREE_OPERAND (expr, 3) = NULL_TREE;
+ break;
+
+ case RTL_EXPR:
+ /* I don't yet know how to emit a sequence multiple times. */
+ if (RTL_EXPR_SEQUENCE (expr) != 0)
+ abort ();
+ break;
+
+ case CALL_EXPR:
+ CALL_EXPR_RTL (expr) = 0;
+ if (TREE_OPERAND (expr, 1)
+ && TREE_CODE (TREE_OPERAND (expr, 1)) == TREE_LIST)
+ {
+ tree exp = TREE_OPERAND (expr, 1);
+ while (exp)
+ {
+ unsave_expr_now (TREE_VALUE (exp));
+ exp = TREE_CHAIN (exp);
+ }
+ }
+ break;
+ }
+
+ switch (TREE_CODE_CLASS (code))
+ {
+ case 'c': /* a constant */
+ case 't': /* a type node */
+ case 'x': /* something random, like an identifier or an ERROR_MARK. */
+ case 'd': /* A decl node */
+ case 'b': /* A block node */
+ return expr;
+
+ case 'e': /* an expression */
+ case 'r': /* a reference */
+ case 's': /* an expression with side effects */
+ case '<': /* a comparison expression */
+ case '2': /* a binary arithmetic expression */
+ case '1': /* a unary arithmetic expression */
+ for (i = tree_code_length[(int) code] - 1; i >= 0; i--)
+ unsave_expr_now (TREE_OPERAND (expr, i));
+ return expr;
+
+ default:
+ abort ();
+ }
+}
\f
/* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
or offset that depends on a field within a record.
in it since it is supplying a value for it. */
if (code == WITH_RECORD_EXPR)
return 0;
+ else if (code == PLACEHOLDER_EXPR)
+ return 1;
switch (TREE_CODE_CLASS (code))
{
tree r;
{
enum tree_code code = TREE_CODE (exp);
+ tree op0, op1, op2;
+ tree new = 0;
tree inner;
switch (TREE_CODE_CLASS (code))
switch (tree_code_length[(int) code])
{
case 1:
- return fold (build1 (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0),
- f, r)));
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ if (op0 == TREE_OPERAND (exp, 0))
+ return exp;
+
+ new = fold (build1 (code, TREE_TYPE (exp), op0));
+ break;
case 2:
/* An RTL_EXPR cannot contain a PLACEHOLDER_EXPR; a CONSTRUCTOR
else if (code == CONSTRUCTOR)
abort ();
- return fold (build (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 1),
- f, r)));
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ op1 = substitute_in_expr (TREE_OPERAND (exp, 1), f, r);
+ if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1))
+ return exp;
+
+ new = fold (build (code, TREE_TYPE (exp), op0, op1));
+ break;
case 3:
/* It cannot be that anything inside a SAVE_EXPR contains a
if (code != COND_EXPR)
abort ();
- return fold (build (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 1), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 2),
- f, r)));
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ op1 = substitute_in_expr (TREE_OPERAND (exp, 1), f, r);
+ op2 = substitute_in_expr (TREE_OPERAND (exp, 2), f, r);
+ if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)
+ && op2 == TREE_OPERAND (exp, 2))
+ return exp;
+
+ new = fold (build (code, TREE_TYPE (exp), op0, op1, op2));
}
break;
&& TREE_OPERAND (exp, 1) == f)
return r;
- return fold (build (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0), f, r),
- TREE_OPERAND (exp, 1)));
- case BIT_FIELD_REF:
- return fold (build (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 1), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 2), f, r)));
- case INDIRECT_REF:
- case BUFFER_REF:
- return fold (build1 (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0),
- f, r)));
- case OFFSET_REF:
- return fold (build (code, TREE_TYPE (exp),
- substitute_in_expr (TREE_OPERAND (exp, 0), f, r),
- substitute_in_expr (TREE_OPERAND (exp, 1), f, r)));
- }
- }
+ /* If this expression hasn't been completed let, leave it
+ alone. */
+ if (TREE_CODE (inner) == PLACEHOLDER_EXPR
+ && TREE_TYPE (inner) == 0)
+ return exp;
- /* If it wasn't one of the cases we handle, give up. */
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ if (op0 == TREE_OPERAND (exp, 0))
+ return exp;
- abort ();
-}
-\f
-/* Given a type T, a FIELD_DECL F, and a replacement value R,
- return a new type with all size expressions that contain F
- updated by replacing F with R. */
+ new = fold (build (code, TREE_TYPE (exp), op0,
+ TREE_OPERAND (exp, 1)));
+ break;
-tree
-substitute_in_type (t, f, r)
- tree t, f, r;
-{
- switch (TREE_CODE (t))
- {
- case POINTER_TYPE:
- case VOID_TYPE:
- return t;
- case INTEGER_TYPE:
- case ENUMERAL_TYPE:
- case BOOLEAN_TYPE:
- case CHAR_TYPE:
- if ((TREE_CODE (TYPE_MIN_VALUE (t)) != INTEGER_CST
- && contains_placeholder_p (TYPE_MIN_VALUE (t)))
- || (TREE_CODE (TYPE_MAX_VALUE (t)) != INTEGER_CST
- && contains_placeholder_p (TYPE_MAX_VALUE (t))))
- return build_range_type (t,
- substitute_in_expr (TYPE_MIN_VALUE (t), f, r),
- substitute_in_expr (TYPE_MAX_VALUE (t), f, r));
- return t;
+ case BIT_FIELD_REF:
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ op1 = substitute_in_expr (TREE_OPERAND (exp, 1), f, r);
+ op2 = substitute_in_expr (TREE_OPERAND (exp, 2), f, r);
+ if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)
+ && op2 == TREE_OPERAND (exp, 2))
+ return exp;
- case REAL_TYPE:
- if ((TYPE_MIN_VALUE (t) != 0
- && TREE_CODE (TYPE_MIN_VALUE (t)) != REAL_CST
- && contains_placeholder_p (TYPE_MIN_VALUE (t)))
- || (TYPE_MAX_VALUE (t) != 0
- && TREE_CODE (TYPE_MAX_VALUE (t)) != REAL_CST
- && contains_placeholder_p (TYPE_MAX_VALUE (t))))
- {
- t = build_type_copy (t);
+ new = fold (build (code, TREE_TYPE (exp), op0, op1, op2));
+ break;
- if (TYPE_MIN_VALUE (t))
- TYPE_MIN_VALUE (t) = substitute_in_expr (TYPE_MIN_VALUE (t), f, r);
- if (TYPE_MAX_VALUE (t))
- TYPE_MAX_VALUE (t) = substitute_in_expr (TYPE_MAX_VALUE (t), f, r);
- }
- return t;
+ case INDIRECT_REF:
+ case BUFFER_REF:
+ op0 = substitute_in_expr (TREE_OPERAND (exp, 0), f, r);
+ if (op0 == TREE_OPERAND (exp, 0))
+ return exp;
- case COMPLEX_TYPE:
- return build_complex_type (substitute_in_type (TREE_TYPE (t), f, r));
-
- case OFFSET_TYPE:
- case METHOD_TYPE:
- case REFERENCE_TYPE:
- case FILE_TYPE:
- case SET_TYPE:
- case FUNCTION_TYPE:
- case LANG_TYPE:
- /* Don't know how to do these yet. */
- abort ();
+ new = fold (build1 (code, TREE_TYPE (exp), op0));
+ break;
+ }
+ }
- case ARRAY_TYPE:
- t = build_array_type (substitute_in_type (TREE_TYPE (t), f, r),
- substitute_in_type (TYPE_DOMAIN (t), f, r));
- TYPE_SIZE (t) = 0;
- layout_type (t);
- return t;
+ /* If it wasn't one of the cases we handle, give up. */
+ if (new == 0)
+ abort ();
- case RECORD_TYPE:
- case UNION_TYPE:
- case QUAL_UNION_TYPE:
- {
- tree new = copy_node (t);
- tree field;
- tree last_field = 0;
-
- /* Start out with no fields, make new fields, and chain them
- in. */
-
- TYPE_FIELDS (new) = 0;
- TYPE_SIZE (new) = 0;
-
- for (field = TYPE_FIELDS (t); field;
- field = TREE_CHAIN (field))
- {
- tree new_field = copy_node (field);
-
- TREE_TYPE (new_field)
- = substitute_in_type (TREE_TYPE (new_field), f, r);
-
- /* If this is an anonymous field and the type of this field is
- a UNION_TYPE or RECORD_TYPE with no elements, ignore it. If
- the type just has one element, treat that as the field.
- But don't do this if we are processing a QUAL_UNION_TYPE. */
- if (TREE_CODE (t) != QUAL_UNION_TYPE && DECL_NAME (new_field) == 0
- && (TREE_CODE (TREE_TYPE (new_field)) == UNION_TYPE
- || TREE_CODE (TREE_TYPE (new_field)) == RECORD_TYPE))
- {
- if (TYPE_FIELDS (TREE_TYPE (new_field)) == 0)
- continue;
-
- if (TREE_CHAIN (TYPE_FIELDS (TREE_TYPE (new_field))) == 0)
- new_field = TYPE_FIELDS (TREE_TYPE (new_field));
- }
-
- DECL_CONTEXT (new_field) = new;
- DECL_SIZE (new_field) = 0;
-
- if (TREE_CODE (t) == QUAL_UNION_TYPE)
- {
- /* Do the substitution inside the qualifier and if we find
- that this field will not be present, omit it. */
- DECL_QUALIFIER (new_field)
- = substitute_in_expr (DECL_QUALIFIER (field), f, r);
- if (integer_zerop (DECL_QUALIFIER (new_field)))
- continue;
- }
-
- if (last_field == 0)
- TYPE_FIELDS (new) = new_field;
- else
- TREE_CHAIN (last_field) = new_field;
-
- last_field = new_field;
-
- /* If this is a qualified type and this field will always be
- present, we are done. */
- if (TREE_CODE (t) == QUAL_UNION_TYPE
- && integer_onep (DECL_QUALIFIER (new_field)))
- break;
- }
-
- /* If this used to be a qualified union type, but we now know what
- field will be present, make this a normal union. */
- if (TREE_CODE (new) == QUAL_UNION_TYPE
- && (TYPE_FIELDS (new) == 0
- || integer_onep (DECL_QUALIFIER (TYPE_FIELDS (new)))))
- TREE_SET_CODE (new, UNION_TYPE);
-
- layout_type (new);
- return new;
- }
- }
+ TREE_READONLY (new) = TREE_READONLY (exp);
+ return new;
}
\f
/* Stabilize a reference so that we can use it any number of times
break;
case COMPOUND_EXPR:
- result = build_nt (COMPOUND_EXPR,
- stabilize_reference_1 (TREE_OPERAND (ref, 0)),
- stabilize_reference (TREE_OPERAND (ref, 1)));
- break;
+ /* We cannot wrap the first expression in a SAVE_EXPR, as then
+ it wouldn't be ignored. This matters when dealing with
+ volatiles. */
+ return stabilize_reference_1 (ref);
case RTL_EXPR:
result = build1 (INDIRECT_REF, TREE_TYPE (ref),
/* Same as above, but only builds for unary operators.
Saves lions share of calls to `build'; cuts down use
of varargs, which is expensive for RISC machines. */
+
tree
build1 (code, type, node)
enum tree_code code;
tree type;
tree node;
{
- register struct obstack *obstack = current_obstack;
+ register struct obstack *obstack = expression_obstack;
register int i, length;
register tree_node_kind kind;
register tree t;
kind = e_kind;
#endif
- obstack = expression_obstack;
length = sizeof (struct tree_exp);
t = (tree) obstack_alloc (obstack, length);
}
\f
/* Return a declaration like DDECL except that its DECL_MACHINE_ATTRIBUTE
- is ATTRIBUTE. */
+ is ATTRIBUTE. */
tree
build_decl_attribute_variant (ddecl, attribute)
/* Return a 1 if ATTR_NAME and ATTR_ARGS is valid for either declaration DECL
or type TYPE and 0 otherwise. Validity is determined the configuration
- macros VALID_MACHINE_DECL_ATTRIBUTE and VALID_MACHINE_TYPE_ATTRIBUTE. */
+ macros VALID_MACHINE_DECL_ATTRIBUTE and VALID_MACHINE_TYPE_ATTRIBUTE. */
int
valid_machine_attribute (attr_name, attr_args, decl, type)
TREE_TYPE (decl) = type;
valid = 1;
}
+
+ /* Handle putting a type attribute on pointer-to-function-type by putting
+ the attribute on the function type. */
+ else if (TREE_CODE (type) == POINTER_TYPE
+ && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE
+ && VALID_MACHINE_TYPE_ATTRIBUTE (TREE_TYPE (type), type_attr_list,
+ attr_name, attr_args))
+ {
+ tree inner_type = TREE_TYPE (type);
+ tree inner_attr_list = TYPE_ATTRIBUTES (inner_type);
+ tree attr = lookup_attribute (IDENTIFIER_POINTER (attr_name),
+ type_attr_list);
+
+ if (attr != NULL_TREE)
+ TREE_VALUE (attr) = attr_args;
+ else
+ {
+ inner_attr_list = tree_cons (attr_name, attr_args, inner_attr_list);
+ inner_type = build_type_attribute_variant (inner_type,
+ inner_attr_list);
+ }
+
+ if (decl != 0)
+ TREE_TYPE (decl) = build_pointer_type (inner_type);
+
+ valid = 1;
+ }
#endif
return valid;
return NULL_TREE;
}
+
+/* Return an attribute list that is the union of a1 and a2. */
+
+tree
+merge_attributes (a1, a2)
+ register tree a1, a2;
+{
+ tree attributes;
+
+ /* Either one unset? Take the set one. */
+
+ if (! (attributes = a1))
+ attributes = a2;
+
+ /* One that completely contains the other? Take it. */
+
+ else if (a2 && ! attribute_list_contained (a1, a2))
+ if (attribute_list_contained (a2, a1))
+ attributes = a2;
+ else
+ {
+ /* Pick the longest list, and hang on the other list. */
+ /* ??? For the moment we punt on the issue of attrs with args. */
+
+ if (list_length (a1) < list_length (a2))
+ attributes = a2, a2 = a1;
+
+ for (; a2; a2 = TREE_CHAIN (a2))
+ if (lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2)),
+ attributes) == NULL_TREE)
+ {
+ a1 = copy_node (a2);
+ TREE_CHAIN (a1) = attributes;
+ attributes = a1;
+ }
+ }
+ return attributes;
+}
\f
/* Return a type like TYPE except that its TYPE_READONLY is CONSTP
and its TYPE_VOLATILE is VOLATILEP.
like the one we need to have. If so, use that existing one. We must
preserve the TYPE_NAME, since there is code that depends on this. */
- for (t = TYPE_MAIN_VARIANT(type); t; t = TYPE_NEXT_VARIANT (t))
+ for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
if (constp == TYPE_READONLY (t) && volatilep == TYPE_VOLATILE (t)
&& TYPE_NAME (t) == TYPE_NAME (type))
return t;
&& (TYPE_MIN_VALUE (h->type) == TYPE_MIN_VALUE (type)
|| tree_int_cst_equal (TYPE_MIN_VALUE (h->type),
TYPE_MIN_VALUE (type)))
+ /* Note that TYPE_DOMAIN is TYPE_ARG_TYPES for FUNCTION_TYPE. */
&& (TYPE_DOMAIN (h->type) == TYPE_DOMAIN (type)
|| (TYPE_DOMAIN (h->type)
&& TREE_CODE (TYPE_DOMAIN (h->type)) == TREE_LIST
&& TYPE_DOMAIN (type)
&& TREE_CODE (TYPE_DOMAIN (type)) == TREE_LIST
- && type_list_equal (TYPE_DOMAIN (h->type), TYPE_DOMAIN (type)))))
+ && type_list_equal (TYPE_DOMAIN (h->type),
+ TYPE_DOMAIN (type)))))
return h->type;
return 0;
}
for (; t2; t2 = TREE_CHAIN (t2))
{
- tree attr = lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2)), l1);
+ tree attr
+ = lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2)), l1);
if (attr == NULL_TREE)
return 0;
tree l1, l2;
{
register tree t1, t2;
+
for (t1 = l1, t2 = l2; t1 && t2; t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
- {
- if (TREE_VALUE (t1) != TREE_VALUE (t2))
- return 0;
- if (TREE_PURPOSE (t1) != TREE_PURPOSE (t2))
- {
- int cmp = simple_cst_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2));
- if (cmp < 0)
- abort ();
- if (cmp == 0
- || TREE_TYPE (TREE_PURPOSE (t1))
- != TREE_TYPE (TREE_PURPOSE (t2)))
- return 0;
- }
- }
+ if (TREE_VALUE (t1) != TREE_VALUE (t2)
+ || (TREE_PURPOSE (t1) != TREE_PURPOSE (t2)
+ && ! (1 == simple_cst_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2))
+ && (TREE_TYPE (TREE_PURPOSE (t1))
+ == TREE_TYPE (TREE_PURPOSE (t2))))))
+ return 0;
return t1 == t2;
}
return 1;
}
-/* Compare two constructor-element-type constants. */
+/* Compare two constructor-element-type constants. Return 1 if the lists
+ are known to be equal; otherwise return 0. */
+
int
simple_cst_list_equal (l1, l2)
tree l1, l2;
{
while (l1 != NULL_TREE && l2 != NULL_TREE)
{
- int cmp = simple_cst_equal (TREE_VALUE (l1), TREE_VALUE (l2));
- if (cmp < 0)
- abort ();
- if (cmp == 0)
+ if (simple_cst_equal (TREE_VALUE (l1), TREE_VALUE (l2)) != 1)
return 0;
+
l1 = TREE_CHAIN (l1);
l2 = TREE_CHAIN (l2);
}
+
return (l1 == l2);
}
return 0;
}
- /* This general rule works for most tree codes.
- All exceptions should be handled above. */
+ /* This general rule works for most tree codes. All exceptions should be
+ handled above. If this is a language-specific tree code, we can't
+ trust what might be in the operand, so say we don't know
+ the situation. */
+ if ((int) code1
+ >= sizeof standard_tree_code_type / sizeof standard_tree_code_type[0])
+ return -1;
switch (TREE_CODE_CLASS (code1))
{
/* Create a range of some discrete type TYPE (an INTEGER_TYPE,
ENUMERAL_TYPE, BOOLEAN_TYPE, or CHAR_TYPE), with
low bound LOWVAL and high bound HIGHVAL.
- if TYPE==NULL_TREE, sizetype is used. */
+ if TYPE==NULL_TREE, sizetype is used. */
tree
build_range_type (type, lowval, highval)
}
/* Just like build_index_type, but takes lowval and highval instead
- of just highval (maxval). */
+ of just highval (maxval). */
tree
build_index_2_type (lowval,highval)
{
if (TYPE_PRECISION (itype1) != TYPE_PRECISION (itype2)
|| TYPE_MODE (itype1) != TYPE_MODE (itype2)
- || ! simple_cst_equal (TYPE_SIZE (itype1), TYPE_SIZE (itype2))
+ || simple_cst_equal (TYPE_SIZE (itype1), TYPE_SIZE (itype2)) != 1
|| TYPE_ALIGN (itype1) != TYPE_ALIGN (itype2))
return 0;
- if (simple_cst_equal (TYPE_MIN_VALUE (itype1), TYPE_MIN_VALUE (itype2))
- && simple_cst_equal (TYPE_MAX_VALUE (itype1), TYPE_MAX_VALUE (itype2)))
+ if (1 == simple_cst_equal (TYPE_MIN_VALUE (itype1),
+ TYPE_MIN_VALUE (itype2))
+ && 1 == simple_cst_equal (TYPE_MAX_VALUE (itype1),
+ TYPE_MAX_VALUE (itype2)))
return 1;
}
+
return 0;
}
while (context && TREE_CODE (context) != FUNCTION_DECL)
{
if (TREE_CODE (context) == RECORD_TYPE
- || TREE_CODE (context) == UNION_TYPE)
- context = NULL_TREE;
+ || TREE_CODE (context) == UNION_TYPE
+ || TREE_CODE (context) == QUAL_UNION_TYPE)
+ context = TYPE_CONTEXT (context);
else if (TREE_CODE (context) == TYPE_DECL)
context = DECL_CONTEXT (context);
else if (TREE_CODE (context) == BLOCK)
extern char * first_global_object_name;
/* If KIND=='I', return a suitable global initializer (constructor) name.
- If KIND=='D', return a suitable global clean-up (destructor) name. */
+ If KIND=='D', return a suitable global clean-up (destructor) name. */
tree
get_file_function_name (kind)
constraints). -- Raeburn@MIT.EDU, 10 Jan 1990. */
sprintf (buf, FILE_FUNCTION_FORMAT, p);
- /* Don't need to pull wierd characters out of global names. */
+ /* Don't need to pull weird characters out of global names. */
if (p != first_global_object_name)
{
for (p = buf+11; *p; p++)
#ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
|| *p == '$'
#endif
-#ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
+#ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
|| *p == '.'
#endif
|| (*p >= 'A' && *p <= 'Z')
return get_identifier (buf);
}
\f
-/* Expand (the constant part of) a SET_TYPE CONTRUCTOR node.
+/* Expand (the constant part of) a SET_TYPE CONSTRUCTOR node.
The result is placed in BUFFER (which has length BIT_SIZE),
with one bit in each char ('\000' or '\001').
If the constructor is constant, NULL_TREE is returned.
- Otherwise, a TREE_LIST of the non-constant elements is emitted. */
+ Otherwise, a TREE_LIST of the non-constant elements is emitted. */
tree
get_set_constructor_bits (init, buffer, bit_size)
tree_cons (TREE_PURPOSE (vals), TREE_VALUE (vals), non_const_bits);
else if (TREE_PURPOSE (vals) != NULL_TREE)
{
- /* Set a range of bits to ones. */
+ /* Set a range of bits to ones. */
HOST_WIDE_INT lo_index
= TREE_INT_CST_LOW (TREE_PURPOSE (vals)) - domain_min;
HOST_WIDE_INT hi_index
}
else
{
- /* Set a single bit to one. */
+ /* Set a single bit to one. */
HOST_WIDE_INT index
= TREE_INT_CST_LOW (TREE_VALUE (vals)) - domain_min;
if (index < 0 || index >= bit_size)
return non_const_bits;
}
-/* Expand (the constant part of) a SET_TYPE CONTRUCTOR node.
+/* Expand (the constant part of) a SET_TYPE CONSTRUCTOR node.
The result is placed in BUFFER (which is an array of bytes).
If the constructor is constant, NULL_TREE is returned.
- Otherwise, a TREE_LIST of the non-constant elements is emitted. */
+ Otherwise, a TREE_LIST of the non-constant elements is emitted. */
tree
get_set_constructor_bytes (init, buffer, wd_size)
int bit_size = wd_size * set_word_size;
int bit_pos = 0;
unsigned char *bytep = buffer;
- char *bit_buffer = (char*)alloca(bit_size);
+ char *bit_buffer = (char *) alloca(bit_size);
tree non_const_bits = get_set_constructor_bits (init, bit_buffer, bit_size);
for (i = 0; i < wd_size; i++)
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