/* 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, 2005 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
This file is part of GCC.
static tree valid_compound_expr_initializer (tree, tree);
static void push_string (const char *);
static void push_member_name (tree);
-static void push_array_bounds (int);
static int spelling_length (void);
static char *print_spelling (char *);
static void warning_init (const char *);
static struct tagged_tu_seen_cache *
alloc_tagged_tu_seen_cache (tree t1, tree t2)
{
- struct tagged_tu_seen_cache *tu = xmalloc (sizeof (struct tagged_tu_seen_cache));
+ struct tagged_tu_seen_cache *tu = XNEW (struct tagged_tu_seen_cache);
tu->next = tagged_tu_seen_base;
tu->t1 = t1;
tu->t2 = t2;
/* Report a read-only lvalue. */
if (TREE_READONLY (arg))
- readonly_error (arg,
- ((code == PREINCREMENT_EXPR
- || code == POSTINCREMENT_EXPR)
- ? lv_increment : lv_decrement));
+ {
+ readonly_error (arg,
+ ((code == PREINCREMENT_EXPR
+ || code == POSTINCREMENT_EXPR)
+ ? lv_increment : lv_decrement));
+ return error_mark_node;
+ }
if (TREE_CODE (TREE_TYPE (arg)) == BOOLEAN_TYPE)
val = boolean_increment (code, arg);
when we have proper support for integer constant expressions. */
val = get_base_address (arg);
if (val && TREE_CODE (val) == INDIRECT_REF
- && integer_zerop (TREE_OPERAND (val, 0)))
- return fold_convert (argtype, fold_offsetof (arg));
+ && TREE_CONSTANT (TREE_OPERAND (val, 0)))
+ {
+ tree op0 = fold_convert (argtype, fold_offsetof (arg)), op1;
+
+ op1 = fold_convert (argtype, TREE_OPERAND (val, 0));
+ return fold_build2 (PLUS_EXPR, argtype, op0, op1);
+ }
val = build1 (ADDR_EXPR, argtype, arg);
if (TREE_CODE (type) == INTEGER_TYPE
&& TREE_CODE (otype) == POINTER_TYPE
- && TYPE_PRECISION (type) != TYPE_PRECISION (otype)
- && !TREE_CONSTANT (value))
+ && TYPE_PRECISION (type) != TYPE_PRECISION (otype))
+ /* Unlike conversion of integers to pointers, where the
+ warning is disabled for converting constants because
+ of cases such as SIG_*, warn about converting constant
+ pointers to integers. In some cases it may cause unwanted
+ sign extension, and a warning is appropriate. */
warning (OPT_Wpointer_to_int_cast,
"cast from pointer to integer of different size");
|| ((TREE_CODE (lhstype) == RECORD_TYPE
|| TREE_CODE (lhstype) == UNION_TYPE)
&& C_TYPE_FIELDS_READONLY (lhstype)))
- readonly_error (lhs, lv_assign);
+ {
+ readonly_error (lhs, lv_assign);
+ return error_mark_node;
+ }
/* If storing into a structure or union member,
it has probably been given type `int'.
int kind;
union
{
- int i;
+ unsigned HOST_WIDE_INT i;
const char *s;
} u;
};
/* Push an array bounds on the stack. Printed as [BOUNDS]. */
static void
-push_array_bounds (int bounds)
+push_array_bounds (unsigned HOST_WIDE_INT bounds)
{
PUSH_SPELLING (SPELLING_BOUNDS, bounds, u.i);
}
for (p = spelling_base; p < spelling; p++)
if (p->kind == SPELLING_BOUNDS)
{
- sprintf (d, "[%d]", p->u.i);
+ sprintf (d, "[" HOST_WIDE_INT_PRINT_UNSIGNED "]", p->u.i);
d += strlen (d);
}
else
tree inside_init = init;
if (type == error_mark_node
+ || !init
|| init == error_mark_node
|| TREE_TYPE (init) == error_mark_node)
return error_mark_node;
start_init (tree decl, tree asmspec_tree ATTRIBUTE_UNUSED, int top_level)
{
const char *locus;
- struct initializer_stack *p = xmalloc (sizeof (struct initializer_stack));
+ struct initializer_stack *p = XNEW (struct initializer_stack);
p->decl = constructor_decl;
p->require_constant_value = require_constant_value;
/* Vectors are like simple fixed-size arrays. */
constructor_max_index =
build_int_cst (NULL_TREE, TYPE_VECTOR_SUBPARTS (constructor_type) - 1);
- constructor_index = convert (bitsizetype, bitsize_zero_node);
+ constructor_index = bitsize_zero_node;
constructor_unfilled_index = constructor_index;
}
else
else if (TREE_CODE (constructor_type) == ARRAY_TYPE)
{
constructor_type = TREE_TYPE (constructor_type);
- push_array_bounds (tree_low_cst (constructor_index, 0));
+ push_array_bounds (tree_low_cst (constructor_index, 1));
constructor_depth++;
}
constructor_stack = p->next;
free (p);
- if (ret.value == 0)
- {
- if (constructor_stack == 0)
- {
- ret.value = error_mark_node;
- return ret;
- }
- return ret;
- }
+ if (ret.value == 0 && constructor_stack == 0)
+ ret.value = error_mark_node;
return ret;
}
/* Now output the actual element. */
if (value.value)
{
- push_array_bounds (tree_low_cst (constructor_index, 0));
+ push_array_bounds (tree_low_cst (constructor_index, 1));
output_init_element (value.value, strict_string,
elttype, constructor_index, 1);
RESTORE_SPELLING_DEPTH (constructor_depth);
&if_locus);
}
- /* Diagnose ";" via the special empty statement node that we create. */
- if (extra_warnings)
- {
- tree *inner_then = &then_block, *inner_else = &else_block;
-
- if (TREE_CODE (*inner_then) == STATEMENT_LIST
- && STATEMENT_LIST_TAIL (*inner_then))
- inner_then = &STATEMENT_LIST_TAIL (*inner_then)->stmt;
- if (*inner_else && TREE_CODE (*inner_else) == STATEMENT_LIST
- && STATEMENT_LIST_TAIL (*inner_else))
- inner_else = &STATEMENT_LIST_TAIL (*inner_else)->stmt;
-
- if (TREE_CODE (*inner_then) == NOP_EXPR && !TREE_TYPE (*inner_then))
- {
- if (!*inner_else)
- warning (0, "%Hempty body in an if-statement",
- EXPR_LOCUS (*inner_then));
-
- *inner_then = alloc_stmt_list ();
- }
- if (*inner_else
- && TREE_CODE (*inner_else) == NOP_EXPR
- && !TREE_TYPE (*inner_else))
- {
- warning (0, "%Hempty body in an else-statement",
- EXPR_LOCUS (*inner_else));
-
- *inner_else = alloc_stmt_list ();
- }
- }
+ empty_body_warning (then_block, else_block);
stmt = build3 (COND_EXPR, void_type_node, cond, then_block, else_block);
SET_EXPR_LOCATION (stmt, if_locus);
if (!skip)
*label_p = label = create_artificial_label ();
}
- else if (TREE_CODE (label) != LABEL_DECL)
+ else if (TREE_CODE (label) == LABEL_DECL)
+ ;
+ else switch (TREE_INT_CST_LOW (label))
{
+ case 0:
if (is_break)
error ("break statement not within loop or switch");
else
error ("continue statement not within a loop");
return NULL_TREE;
+
+ case 1:
+ gcc_assert (is_break);
+ error ("break statement used with OpenMP for loop");
+ return NULL_TREE;
+
+ default:
+ gcc_unreachable ();
}
if (skip)
if (shorten && none_complex)
{
int unsigned0, unsigned1;
- tree arg0 = get_narrower (op0, &unsigned0);
- tree arg1 = get_narrower (op1, &unsigned1);
- /* UNS is 1 if the operation to be done is an unsigned one. */
- int uns = TYPE_UNSIGNED (result_type);
+ tree arg0, arg1;
+ int uns;
tree type;
+ /* Cast OP0 and OP1 to RESULT_TYPE. Doing so prevents
+ excessive narrowing when we call get_narrower below. For
+ example, suppose that OP0 is of unsigned int extended
+ from signed char and that RESULT_TYPE is long long int.
+ If we explicitly cast OP0 to RESULT_TYPE, OP0 would look
+ like
+
+ (long long int) (unsigned int) signed_char
+
+ which get_narrower would narrow down to
+
+ (unsigned int) signed char
+
+ If we do not cast OP0 first, get_narrower would return
+ signed_char, which is inconsistent with the case of the
+ explicit cast. */
+ op0 = convert (result_type, op0);
+ op1 = convert (result_type, op1);
+
+ arg0 = get_narrower (op0, &unsigned0);
+ arg1 = get_narrower (op1, &unsigned1);
+
+ /* UNS is 1 if the operation to be done is an unsigned one. */
+ uns = TYPE_UNSIGNED (result_type);
+
final_type = result_type;
/* Handle the case that OP0 (or OP1) does not *contain* a conversion
else
return expr;
}
+
+\f
+/* Like c_begin_compound_stmt, except force the retention of the BLOCK. */
+
+tree
+c_begin_omp_parallel (void)
+{
+ tree block;
+
+ keep_next_level ();
+ block = c_begin_compound_stmt (true);
+
+ return block;
+}
+
+tree
+c_finish_omp_parallel (tree clauses, tree block)
+{
+ tree stmt;
+
+ block = c_end_compound_stmt (block, true);
+
+ stmt = make_node (OMP_PARALLEL);
+ TREE_TYPE (stmt) = void_type_node;
+ OMP_PARALLEL_CLAUSES (stmt) = clauses;
+ OMP_PARALLEL_BODY (stmt) = block;
+
+ return add_stmt (stmt);
+}
+
+/* For all elements of CLAUSES, validate them vs OpenMP constraints.
+ Remove any elements from the list that are invalid. */
+
+tree
+c_finish_omp_clauses (tree clauses)
+{
+ bitmap_head generic_head, firstprivate_head, lastprivate_head;
+ tree c, t, *pc = &clauses;
+ const char *name;
+
+ bitmap_obstack_initialize (NULL);
+ bitmap_initialize (&generic_head, &bitmap_default_obstack);
+ bitmap_initialize (&firstprivate_head, &bitmap_default_obstack);
+ bitmap_initialize (&lastprivate_head, &bitmap_default_obstack);
+
+ for (pc = &clauses, c = clauses; c ; c = *pc)
+ {
+ bool remove = false;
+ bool need_complete = false;
+ bool need_implicitly_determined = false;
+
+ switch (OMP_CLAUSE_CODE (c))
+ {
+ case OMP_CLAUSE_SHARED:
+ name = "shared";
+ need_implicitly_determined = true;
+ goto check_dup_generic;
+
+ case OMP_CLAUSE_PRIVATE:
+ name = "private";
+ need_complete = true;
+ need_implicitly_determined = true;
+ goto check_dup_generic;
+
+ case OMP_CLAUSE_REDUCTION:
+ name = "reduction";
+ need_implicitly_determined = true;
+ t = OMP_CLAUSE_DECL (c);
+ if (AGGREGATE_TYPE_P (TREE_TYPE (t))
+ || POINTER_TYPE_P (TREE_TYPE (t)))
+ {
+ error ("%qE has invalid type for %<reduction%>", t);
+ remove = true;
+ }
+ else if (FLOAT_TYPE_P (TREE_TYPE (t)))
+ {
+ enum tree_code r_code = OMP_CLAUSE_REDUCTION_CODE (c);
+ const char *r_name = NULL;
+
+ switch (r_code)
+ {
+ case PLUS_EXPR:
+ case MULT_EXPR:
+ case MINUS_EXPR:
+ break;
+ case BIT_AND_EXPR:
+ r_name = "&";
+ break;
+ case BIT_XOR_EXPR:
+ r_name = "^";
+ break;
+ case BIT_IOR_EXPR:
+ r_name = "|";
+ break;
+ case TRUTH_ANDIF_EXPR:
+ r_name = "&&";
+ break;
+ case TRUTH_ORIF_EXPR:
+ r_name = "||";
+ break;
+ default:
+ gcc_unreachable ();
+ }
+ if (r_name)
+ {
+ error ("%qE has invalid type for %<reduction(%s)%>",
+ t, r_name);
+ remove = true;
+ }
+ }
+ goto check_dup_generic;
+
+ case OMP_CLAUSE_COPYPRIVATE:
+ name = "copyprivate";
+ goto check_dup_generic;
+
+ case OMP_CLAUSE_COPYIN:
+ name = "copyin";
+ t = OMP_CLAUSE_DECL (c);
+ if (TREE_CODE (t) != VAR_DECL || !DECL_THREAD_LOCAL_P (t))
+ {
+ error ("%qE must be %<threadprivate%> for %<copyin%>", t);
+ remove = true;
+ }
+ goto check_dup_generic;
+
+ check_dup_generic:
+ t = OMP_CLAUSE_DECL (c);
+ if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
+ {
+ error ("%qE is not a variable in clause %qs", t, name);
+ remove = true;
+ }
+ else if (bitmap_bit_p (&generic_head, DECL_UID (t))
+ || bitmap_bit_p (&firstprivate_head, DECL_UID (t))
+ || bitmap_bit_p (&lastprivate_head, DECL_UID (t)))
+ {
+ error ("%qE appears more than once in data clauses", t);
+ remove = true;
+ }
+ else
+ bitmap_set_bit (&generic_head, DECL_UID (t));
+ break;
+
+ case OMP_CLAUSE_FIRSTPRIVATE:
+ name = "firstprivate";
+ t = OMP_CLAUSE_DECL (c);
+ need_complete = true;
+ need_implicitly_determined = true;
+ if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
+ {
+ error ("%qE is not a variable in clause %<firstprivate%>", t);
+ remove = true;
+ }
+ else if (bitmap_bit_p (&generic_head, DECL_UID (t))
+ || bitmap_bit_p (&firstprivate_head, DECL_UID (t)))
+ {
+ error ("%qE appears more than once in data clauses", t);
+ remove = true;
+ }
+ else
+ bitmap_set_bit (&firstprivate_head, DECL_UID (t));
+ break;
+
+ case OMP_CLAUSE_LASTPRIVATE:
+ name = "lastprivate";
+ t = OMP_CLAUSE_DECL (c);
+ need_complete = true;
+ need_implicitly_determined = true;
+ if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
+ {
+ error ("%qE is not a variable in clause %<lastprivate%>", t);
+ remove = true;
+ }
+ else if (bitmap_bit_p (&generic_head, DECL_UID (t))
+ || bitmap_bit_p (&lastprivate_head, DECL_UID (t)))
+ {
+ error ("%qE appears more than once in data clauses", t);
+ remove = true;
+ }
+ else
+ bitmap_set_bit (&lastprivate_head, DECL_UID (t));
+ break;
+
+ case OMP_CLAUSE_IF:
+ case OMP_CLAUSE_NUM_THREADS:
+ case OMP_CLAUSE_SCHEDULE:
+ case OMP_CLAUSE_NOWAIT:
+ case OMP_CLAUSE_ORDERED:
+ case OMP_CLAUSE_DEFAULT:
+ pc = &OMP_CLAUSE_CHAIN (c);
+ continue;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ if (!remove)
+ {
+ t = OMP_CLAUSE_DECL (c);
+
+ if (need_complete)
+ {
+ t = require_complete_type (t);
+ if (t == error_mark_node)
+ remove = true;
+ }
+
+ if (need_implicitly_determined)
+ {
+ const char *share_name = NULL;
+
+ if (TREE_CODE (t) == VAR_DECL && DECL_THREAD_LOCAL_P (t))
+ share_name = "threadprivate";
+ else switch (c_omp_predetermined_sharing (t))
+ {
+ case OMP_CLAUSE_DEFAULT_UNSPECIFIED:
+ break;
+ case OMP_CLAUSE_DEFAULT_SHARED:
+ share_name = "shared";
+ break;
+ case OMP_CLAUSE_DEFAULT_PRIVATE:
+ share_name = "private";
+ break;
+ default:
+ gcc_unreachable ();
+ }
+ if (share_name)
+ {
+ error ("%qE is predetermined %qs for %qs",
+ t, share_name, name);
+ remove = true;
+ }
+ }
+ }
+
+ if (remove)
+ *pc = OMP_CLAUSE_CHAIN (c);
+ else
+ pc = &OMP_CLAUSE_CHAIN (c);
+ }
+
+ bitmap_obstack_release (NULL);
+ return clauses;
+}
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