static void
genericize_if_stmt (tree *stmt_p)
{
tree stmt, cond, then_, else_;
location_t locus = EXPR_LOCATION (*stmt_p);
stmt = *stmt_p;
cond = IF_COND (stmt);
then_ = THEN_CLAUSE (stmt);
else_ = ELSE_CLAUSE (stmt);
if (!then_)
then_ = build_empty_stmt ();
if (!else_)
else_ = build_empty_stmt ();
if (integer_nonzerop (cond) && !TREE_SIDE_EFFECTS (else_))
stmt = then_;
else if (integer_zerop (cond) && !TREE_SIDE_EFFECTS (then_))
stmt = else_;
else
stmt = build3 (COND_EXPR, void_type_node, cond, then_, else_);
if (CAN_HAVE_LOCATION_P (stmt) && !EXPR_HAS_LOCATION (stmt))
SET_EXPR_LOCATION (stmt, locus);
*stmt_p = stmt;
}
/* Reallocate MEM so it has SIZE bytes of data. This behaves like the
following pseudo-code:
void *
internal_realloc (void *mem, size_t size)
{
if (size < 0)
runtime_error ("Attempt to allocate a negative amount of memory.");
res = realloc (mem, size);
if (!res && size != 0)
_gfortran_os_error ("Out of memory");
if (size == 0)
return NULL;
return res;
} */
tree
gfc_call_realloc (stmtblock_t * block, tree mem, tree size)
{
tree msg, res, negative, nonzero, zero, null_result, tmp;
tree type = TREE_TYPE (mem);
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* Create a variable to hold the result. */
res = gfc_create_var (type, NULL);
/* size < 0 ? */
negative = fold_build2 (LT_EXPR, boolean_type_node, size,
build_int_cst (size_type_node, 0));
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Attempt to allocate a negative amount of memory."));
tmp = fold_build3 (COND_EXPR, void_type_node, negative,
build_call_expr_loc (input_location,
gfor_fndecl_runtime_error, 1, msg),
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
/* Call realloc and check the result. */
tmp = build_call_expr_loc (input_location,
built_in_decls[BUILT_IN_REALLOC], 2,
fold_convert (pvoid_type_node, mem), size);
gfc_add_modify (block, res, fold_convert (type, tmp));
null_result = fold_build2 (EQ_EXPR, boolean_type_node, res,
build_int_cst (pvoid_type_node, 0));
nonzero = fold_build2 (NE_EXPR, boolean_type_node, size,
build_int_cst (size_type_node, 0));
null_result = fold_build2 (TRUTH_AND_EXPR, boolean_type_node, null_result,
nonzero);
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Out of memory"));
tmp = fold_build3 (COND_EXPR, void_type_node, null_result,
build_call_expr_loc (input_location,
gfor_fndecl_os_error, 1, msg),
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
/* if (size == 0) then the result is NULL. */
tmp = fold_build2 (MODIFY_EXPR, type, res, build_int_cst (type, 0));
zero = fold_build1 (TRUTH_NOT_EXPR, boolean_type_node, nonzero);
tmp = fold_build3 (COND_EXPR, void_type_node, zero, tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
return res;
}
tree
create_cilk_function_exit (tree frame, bool detaches, bool needs_sync)
{
tree epi = alloc_stmt_list ();
if (needs_sync)
append_to_statement_list (build_cilk_sync (), &epi);
tree func_ptr = build1 (ADDR_EXPR, cilk_frame_ptr_type_decl, frame);
tree pop_frame = build_call_expr (cilk_pop_fndecl, 1, func_ptr);
tree worker = cilk_dot (frame, CILK_TI_FRAME_WORKER, 0);
tree current = cilk_arrow (worker, CILK_TI_WORKER_CUR, 0);
tree parent = cilk_dot (frame, CILK_TI_FRAME_PARENT, 0);
tree set_current = build2 (MODIFY_EXPR, void_type_node, current, parent);
append_to_statement_list (set_current, &epi);
append_to_statement_list (pop_frame, &epi);
tree call = build_call_expr (cilk_leave_fndecl, 1, func_ptr);
if (!detaches)
{
tree flags = cilk_dot (frame, CILK_TI_FRAME_FLAGS, false);
tree flags_cmp_expr = fold_build2 (NE_EXPR, TREE_TYPE (flags), flags,
build_int_cst (TREE_TYPE (flags),
CILK_FRAME_VERSION));
call = fold_build3 (COND_EXPR, void_type_node, flags_cmp_expr,
call, build_empty_stmt (EXPR_LOCATION (flags)));
}
append_to_statement_list (call, &epi);
return epi;
}
tree
gfc_finish_block (stmtblock_t * stmtblock)
{
tree decl;
tree expr;
tree block;
expr = stmtblock->head;
if (!expr)
expr = build_empty_stmt ();
stmtblock->head = NULL_TREE;
if (stmtblock->has_scope)
{
decl = getdecls ();
if (decl)
{
block = poplevel (1, 0, 0);
expr = build3_v (BIND_EXPR, decl, expr, block);
}
else
poplevel (0, 0, 0);
}
return expr;
}
tree
c_build_bind_expr (tree block, tree body)
{
tree decls, bind;
if (block == NULL_TREE)
decls = NULL_TREE;
else if (TREE_CODE (block) == BLOCK)
decls = BLOCK_VARS (block);
else
{
decls = block;
if (DECL_ARTIFICIAL (decls))
block = NULL_TREE;
else
{
block = make_node (BLOCK);
BLOCK_VARS (block) = decls;
add_block_to_enclosing (block);
}
}
if (!body)
body = build_empty_stmt ();
if (decls || block)
{
bind = build3 (BIND_EXPR, void_type_node, decls, body, block);
TREE_SIDE_EFFECTS (bind) = 1;
}
else
bind = body;
return bind;
}
void
gfc_trans_runtime_check (bool error, bool once, tree cond, stmtblock_t * pblock,
locus * where, const char * msgid, ...)
{
va_list ap;
stmtblock_t block;
tree body;
tree tmp;
tree tmpvar = NULL;
if (integer_zerop (cond))
return;
if (once)
{
tmpvar = gfc_create_var (boolean_type_node, "print_warning");
TREE_STATIC (tmpvar) = 1;
DECL_INITIAL (tmpvar) = boolean_true_node;
gfc_add_expr_to_block (pblock, tmpvar);
}
gfc_start_block (&block);
/* The code to generate the error. */
va_start (ap, msgid);
gfc_add_expr_to_block (&block,
trans_runtime_error_vararg (error, where,
msgid, ap));
if (once)
gfc_add_modify (&block, tmpvar, boolean_false_node);
body = gfc_finish_block (&block);
if (integer_onep (cond))
{
gfc_add_expr_to_block (pblock, body);
}
else
{
/* Tell the compiler that this isn't likely. */
if (once)
cond = fold_build2_loc (where->lb->location, TRUTH_AND_EXPR,
long_integer_type_node, tmpvar, cond);
else
cond = fold_convert (long_integer_type_node, cond);
tmp = build_int_cst (long_integer_type_node, 0);
cond = build_call_expr_loc (where->lb->location,
built_in_decls[BUILT_IN_EXPECT], 2, cond, tmp);
cond = fold_convert (boolean_type_node, cond);
tmp = fold_build3_loc (where->lb->location, COND_EXPR, void_type_node,
cond, body,
build_empty_stmt (where->lb->location));
gfc_add_expr_to_block (pblock, tmp);
}
}
/* Reallocate MEM so it has SIZE bytes of data. This behaves like the
following pseudo-code:
void *
internal_realloc (void *mem, size_t size)
{
res = realloc (mem, size);
if (!res && size != 0)
_gfortran_os_error ("Allocation would exceed memory limit");
if (size == 0)
return NULL;
return res;
} */
tree
gfc_call_realloc (stmtblock_t * block, tree mem, tree size)
{
tree msg, res, nonzero, zero, null_result, tmp;
tree type = TREE_TYPE (mem);
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* Create a variable to hold the result. */
res = gfc_create_var (type, NULL);
/* Call realloc and check the result. */
tmp = build_call_expr_loc (input_location,
builtin_decl_explicit (BUILT_IN_REALLOC), 2,
fold_convert (pvoid_type_node, mem), size);
gfc_add_modify (block, res, fold_convert (type, tmp));
null_result = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node,
res, build_int_cst (pvoid_type_node, 0));
nonzero = fold_build2_loc (input_location, NE_EXPR, boolean_type_node, size,
build_int_cst (size_type_node, 0));
null_result = fold_build2_loc (input_location, TRUTH_AND_EXPR, boolean_type_node,
null_result, nonzero);
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Allocation would exceed memory limit"));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
null_result,
build_call_expr_loc (input_location,
gfor_fndecl_os_error, 1, msg),
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
/* if (size == 0) then the result is NULL. */
tmp = fold_build2_loc (input_location, MODIFY_EXPR, type, res,
build_int_cst (type, 0));
zero = fold_build1_loc (input_location, TRUTH_NOT_EXPR, boolean_type_node,
nonzero);
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, zero, tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
return res;
}
void
gfc_trans_runtime_check (tree cond, const char * msgid, stmtblock_t * pblock,
locus * where)
{
stmtblock_t block;
tree body;
tree tmp;
tree args;
char * message;
int line;
if (integer_zerop (cond))
return;
/* The code to generate the error. */
gfc_start_block (&block);
if (where)
{
#ifdef USE_MAPPED_LOCATION
line = LOCATION_LINE (where->lb->location);
#else
line = where->lb->linenum;
#endif
asprintf (&message, "%s (in file '%s', at line %d)", _(msgid),
where->lb->file->filename, line);
}
else
asprintf (&message, "%s (in file '%s', around line %d)", _(msgid),
gfc_source_file, input_line + 1);
tmp = gfc_build_addr_expr (pchar_type_node, gfc_build_cstring_const(message));
gfc_free(message);
args = gfc_chainon_list (NULL_TREE, tmp);
tmp = build_function_call_expr (gfor_fndecl_runtime_error, args);
gfc_add_expr_to_block (&block, tmp);
body = gfc_finish_block (&block);
if (integer_onep (cond))
{
gfc_add_expr_to_block (pblock, body);
}
else
{
/* Tell the compiler that this isn't likely. */
cond = fold_convert (long_integer_type_node, cond);
tmp = gfc_chainon_list (NULL_TREE, cond);
tmp = gfc_chainon_list (tmp, build_int_cst (long_integer_type_node, 0));
cond = build_function_call_expr (built_in_decls[BUILT_IN_EXPECT], tmp);
cond = fold_convert (boolean_type_node, cond);
tmp = build3_v (COND_EXPR, cond, body, build_empty_stmt ());
gfc_add_expr_to_block (pblock, tmp);
}
}
static void
gimplify_if_stmt (tree *stmt_p)
{
tree stmt, cond, then_, else_;
stmt = *stmt_p;
cond = IF_COND (stmt);
then_ = THEN_CLAUSE (stmt);
else_ = ELSE_CLAUSE (stmt);
if (!then_)
then_ = build_empty_stmt ();
if (!else_)
else_ = build_empty_stmt ();
if (integer_nonzerop (cond) && !TREE_SIDE_EFFECTS (else_))
stmt = then_;
else if (integer_zerop (cond) && !TREE_SIDE_EFFECTS (then_))
stmt = else_;
else
stmt = build3 (COND_EXPR, void_type_node, cond, then_, else_);
*stmt_p = stmt;
}
/* Call malloc to allocate size bytes of memory, with special conditions:
+ if size == 0, return a malloced area of size 1,
+ if malloc returns NULL, issue a runtime error. */
tree
gfc_call_malloc (stmtblock_t * block, tree type, tree size)
{
tree tmp, msg, malloc_result, null_result, res, malloc_tree;
stmtblock_t block2;
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* Create a variable to hold the result. */
res = gfc_create_var (prvoid_type_node, NULL);
/* Call malloc. */
gfc_start_block (&block2);
size = fold_build2_loc (input_location, MAX_EXPR, size_type_node, size,
build_int_cst (size_type_node, 1));
malloc_tree = builtin_decl_explicit (BUILT_IN_MALLOC);
gfc_add_modify (&block2, res,
fold_convert (prvoid_type_node,
build_call_expr_loc (input_location,
malloc_tree, 1, size)));
/* Optionally check whether malloc was successful. */
if (gfc_option.rtcheck & GFC_RTCHECK_MEM)
{
null_result = fold_build2_loc (input_location, EQ_EXPR,
boolean_type_node, res,
build_int_cst (pvoid_type_node, 0));
msg = gfc_build_addr_expr (pchar_type_node,
gfc_build_localized_cstring_const ("Memory allocation failed"));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
null_result,
build_call_expr_loc (input_location,
gfor_fndecl_os_error, 1, msg),
build_empty_stmt (input_location));
gfc_add_expr_to_block (&block2, tmp);
}
malloc_result = gfc_finish_block (&block2);
gfc_add_expr_to_block (block, malloc_result);
if (type != NULL)
res = fold_convert (type, res);
return res;
}
/* Allocate memory, using an optional status argument.
This function follows the following pseudo-code:
void *
allocate (size_t size, integer_type stat)
{
void *newmem;
if (stat requested)
stat = 0;
newmem = malloc (MAX (size, 1));
if (newmem == NULL)
{
if (stat)
*stat = LIBERROR_ALLOCATION;
else
runtime_error ("Allocation would exceed memory limit");
}
return newmem;
} */
void
gfc_allocate_using_malloc (stmtblock_t * block, tree pointer,
tree size, tree status)
{
tree tmp, on_error, error_cond;
tree status_type = status ? TREE_TYPE (status) : NULL_TREE;
/* Evaluate size only once, and make sure it has the right type. */
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* If successful and stat= is given, set status to 0. */
if (status != NULL_TREE)
gfc_add_expr_to_block (block,
fold_build2_loc (input_location, MODIFY_EXPR, status_type,
status, build_int_cst (status_type, 0)));
/* The allocation itself. */
gfc_add_modify (block, pointer,
fold_convert (TREE_TYPE (pointer),
build_call_expr_loc (input_location,
builtin_decl_explicit (BUILT_IN_MALLOC), 1,
fold_build2_loc (input_location,
MAX_EXPR, size_type_node, size,
build_int_cst (size_type_node, 1)))));
/* What to do in case of error. */
if (status != NULL_TREE)
on_error = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
status, build_int_cst (status_type, LIBERROR_ALLOCATION));
else
on_error = build_call_expr_loc (input_location, gfor_fndecl_os_error, 1,
gfc_build_addr_expr (pchar_type_node,
gfc_build_localized_cstring_const
("Allocation would exceed memory limit")));
error_cond = fold_build2_loc (input_location, EQ_EXPR,
boolean_type_node, pointer,
build_int_cst (prvoid_type_node, 0));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
gfc_unlikely (error_cond), on_error,
build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
}
static void
gimplify_switch_stmt (tree *stmt_p)
{
tree stmt = *stmt_p;
tree break_block, body;
location_t stmt_locus = input_location;
break_block = begin_bc_block (bc_break);
body = SWITCH_STMT_BODY (stmt);
if (!body)
body = build_empty_stmt ();
*stmt_p = build3 (SWITCH_EXPR, SWITCH_STMT_TYPE (stmt),
SWITCH_STMT_COND (stmt), body, NULL_TREE);
SET_EXPR_LOCATION (*stmt_p, stmt_locus);
gimplify_stmt (stmt_p);
*stmt_p = finish_bc_block (bc_break, break_block, *stmt_p);
}
/* Free a given variable, if it's not NULL. */
tree
gfc_call_free (tree var)
{
stmtblock_t block;
tree tmp, cond, call;
if (TREE_TYPE (var) != TREE_TYPE (pvoid_type_node))
var = fold_convert (pvoid_type_node, var);
gfc_start_block (&block);
var = gfc_evaluate_now (var, &block);
cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node, var,
build_int_cst (pvoid_type_node, 0));
call = build_call_expr_loc (input_location,
built_in_decls[BUILT_IN_FREE], 1, var);
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond, call,
build_empty_stmt (input_location));
gfc_add_expr_to_block (&block, tmp);
return gfc_finish_block (&block);
}
static void
genericize_switch_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
tree break_block, body, cond, type;
location_t stmt_locus = EXPR_LOCATION (stmt);
break_block = begin_bc_block (bc_break, stmt_locus);
body = SWITCH_STMT_BODY (stmt);
if (!body)
body = build_empty_stmt (stmt_locus);
cond = SWITCH_STMT_COND (stmt);
type = SWITCH_STMT_TYPE (stmt);
cp_walk_tree (&body, cp_genericize_r, data, NULL);
cp_walk_tree (&cond, cp_genericize_r, data, NULL);
cp_walk_tree (&type, cp_genericize_r, data, NULL);
*walk_subtrees = 0;
*stmt_p = build3_loc (stmt_locus, SWITCH_EXPR, type, cond, body, NULL_TREE);
finish_bc_block (stmt_p, bc_break, break_block);
}
static void
gimplify_switch_stmt (tree *stmt_p, gimple_seq *pre_p)
{
tree stmt = *stmt_p;
tree break_block, body, t;
location_t stmt_locus = input_location;
gimple_seq seq = NULL;
break_block = begin_bc_block (bc_break);
body = SWITCH_STMT_BODY (stmt);
if (!body)
body = build_empty_stmt ();
t = build3 (SWITCH_EXPR, SWITCH_STMT_TYPE (stmt),
SWITCH_STMT_COND (stmt), body, NULL_TREE);
SET_EXPR_LOCATION (t, stmt_locus);
gimplify_and_add (t, &seq);
seq = finish_bc_block (bc_break, break_block, seq);
gimple_seq_add_seq (pre_p, seq);
*stmt_p = NULL_TREE;
}
static tree
gfc_trans_omp_workshare (gfc_code *code, gfc_omp_clauses *clauses)
{
tree res, tmp, stmt;
stmtblock_t block, *pblock = NULL;
stmtblock_t singleblock;
int saved_ompws_flags;
bool singleblock_in_progress = false;
/* True if previous gfc_code in workshare construct is not workshared. */
bool prev_singleunit;
code = code->block->next;
pushlevel (0);
if (!code)
return build_empty_stmt (input_location);
gfc_start_block (&block);
pblock = █
ompws_flags = OMPWS_WORKSHARE_FLAG;
prev_singleunit = false;
/* Translate statements one by one to trees until we reach
the end of the workshare construct. Adjacent gfc_codes that
are a single unit of work are clustered and encapsulated in a
single OMP_SINGLE construct. */
for (; code; code = code->next)
{
if (code->here != 0)
{
res = gfc_trans_label_here (code);
gfc_add_expr_to_block (pblock, res);
}
/* No dependence analysis, use for clauses with wait.
If this is the last gfc_code, use default omp_clauses. */
if (code->next == NULL && clauses->nowait)
ompws_flags |= OMPWS_NOWAIT;
/* By default, every gfc_code is a single unit of work. */
ompws_flags |= OMPWS_CURR_SINGLEUNIT;
ompws_flags &= ~OMPWS_SCALARIZER_WS;
switch (code->op)
{
case EXEC_NOP:
res = NULL_TREE;
break;
case EXEC_ASSIGN:
res = gfc_trans_assign (code);
break;
case EXEC_POINTER_ASSIGN:
res = gfc_trans_pointer_assign (code);
break;
case EXEC_INIT_ASSIGN:
res = gfc_trans_init_assign (code);
break;
case EXEC_FORALL:
res = gfc_trans_forall (code);
break;
case EXEC_WHERE:
res = gfc_trans_where (code);
break;
case EXEC_OMP_ATOMIC:
res = gfc_trans_omp_directive (code);
break;
case EXEC_OMP_PARALLEL:
case EXEC_OMP_PARALLEL_DO:
case EXEC_OMP_PARALLEL_SECTIONS:
case EXEC_OMP_PARALLEL_WORKSHARE:
case EXEC_OMP_CRITICAL:
saved_ompws_flags = ompws_flags;
ompws_flags = 0;
res = gfc_trans_omp_directive (code);
ompws_flags = saved_ompws_flags;
break;
default:
internal_error ("gfc_trans_omp_workshare(): Bad statement code");
}
gfc_set_backend_locus (&code->loc);
if (res != NULL_TREE && ! IS_EMPTY_STMT (res))
{
if (prev_singleunit)
{
if (ompws_flags & OMPWS_CURR_SINGLEUNIT)
/* Add current gfc_code to single block. */
gfc_add_expr_to_block (&singleblock, res);
else
{
/* Finish single block and add it to pblock. */
tmp = gfc_finish_block (&singleblock);
tmp = build2 (OMP_SINGLE, void_type_node, tmp, NULL_TREE);
gfc_add_expr_to_block (pblock, tmp);
/* Add current gfc_code to pblock. */
gfc_add_expr_to_block (pblock, res);
singleblock_in_progress = false;
}
}
else
{
if (ompws_flags & OMPWS_CURR_SINGLEUNIT)
{
/* Start single block. */
gfc_init_block (&singleblock);
gfc_add_expr_to_block (&singleblock, res);
singleblock_in_progress = true;
}
else
/* Add the new statement to the block. */
gfc_add_expr_to_block (pblock, res);
}
prev_singleunit = (ompws_flags & OMPWS_CURR_SINGLEUNIT) != 0;
}
}
/* Finish remaining SINGLE block, if we were in the middle of one. */
if (singleblock_in_progress)
{
/* Finish single block and add it to pblock. */
tmp = gfc_finish_block (&singleblock);
tmp = build2 (OMP_SINGLE, void_type_node, tmp,
clauses->nowait
? build_omp_clause (input_location, OMP_CLAUSE_NOWAIT)
: NULL_TREE);
gfc_add_expr_to_block (pblock, tmp);
}
stmt = gfc_finish_block (pblock);
if (TREE_CODE (stmt) != BIND_EXPR)
{
if (!IS_EMPTY_STMT (stmt))
{
tree bindblock = poplevel (1, 0, 0);
stmt = build3_v (BIND_EXPR, NULL, stmt, bindblock);
}
else
poplevel (0, 0, 0);
}
else
poplevel (0, 0, 0);
ompws_flags = 0;
return stmt;
}
/* User-deallocate; we emit the code directly from the front-end, and the
logic is the same as the previous library function:
void
deallocate (void *pointer, GFC_INTEGER_4 * stat)
{
if (!pointer)
{
if (stat)
*stat = 1;
else
runtime_error ("Attempt to DEALLOCATE unallocated memory.");
}
else
{
free (pointer);
if (stat)
*stat = 0;
}
}
In this front-end version, status doesn't have to be GFC_INTEGER_4.
Moreover, if CAN_FAIL is true, then we will not emit a runtime error,
even when no status variable is passed to us (this is used for
unconditional deallocation generated by the front-end at end of
each procedure).
If a runtime-message is possible, `expr' must point to the original
expression being deallocated for its locus and variable name.
For coarrays, "pointer" must be the array descriptor and not its
"data" component. */
tree
gfc_deallocate_with_status (tree pointer, tree status, tree errmsg,
tree errlen, tree label_finish,
bool can_fail, gfc_expr* expr, bool coarray)
{
stmtblock_t null, non_null;
tree cond, tmp, error;
tree status_type = NULL_TREE;
tree caf_decl = NULL_TREE;
if (coarray)
{
gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (pointer)));
caf_decl = pointer;
pointer = gfc_conv_descriptor_data_get (caf_decl);
STRIP_NOPS (pointer);
}
cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, pointer,
build_int_cst (TREE_TYPE (pointer), 0));
/* When POINTER is NULL, we set STATUS to 1 if it's present, otherwise
we emit a runtime error. */
gfc_start_block (&null);
if (!can_fail)
{
tree varname;
gcc_assert (expr && expr->expr_type == EXPR_VARIABLE && expr->symtree);
varname = gfc_build_cstring_const (expr->symtree->name);
varname = gfc_build_addr_expr (pchar_type_node, varname);
error = gfc_trans_runtime_error (true, &expr->where,
"Attempt to DEALLOCATE unallocated '%s'",
varname);
}
else
error = build_empty_stmt (input_location);
if (status != NULL_TREE && !integer_zerop (status))
{
tree cond2;
status_type = TREE_TYPE (TREE_TYPE (status));
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
status, build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, 1));
error = fold_build3_loc (input_location, COND_EXPR, void_type_node,
cond2, tmp, error);
}
gfc_add_expr_to_block (&null, error);
/* When POINTER is not NULL, we free it. */
gfc_start_block (&non_null);
if (!coarray || gfc_option.coarray != GFC_FCOARRAY_LIB)
{
tmp = build_call_expr_loc (input_location,
builtin_decl_explicit (BUILT_IN_FREE), 1,
fold_convert (pvoid_type_node, pointer));
gfc_add_expr_to_block (&non_null, tmp);
if (status != NULL_TREE && !integer_zerop (status))
{
/* We set STATUS to zero if it is present. */
tree status_type = TREE_TYPE (TREE_TYPE (status));
tree cond2;
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
status,
build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, 0));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
gfc_unlikely (cond2), tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (&non_null, tmp);
}
}
else
{
tree caf_type, token, cond2;
tree pstat = null_pointer_node;
if (errmsg == NULL_TREE)
{
gcc_assert (errlen == NULL_TREE);
errmsg = null_pointer_node;
errlen = build_zero_cst (integer_type_node);
}
else
{
gcc_assert (errlen != NULL_TREE);
if (!POINTER_TYPE_P (TREE_TYPE (errmsg)))
errmsg = gfc_build_addr_expr (NULL_TREE, errmsg);
}
caf_type = TREE_TYPE (caf_decl);
if (status != NULL_TREE && !integer_zerop (status))
{
gcc_assert (status_type == integer_type_node);
pstat = status;
}
if (GFC_DESCRIPTOR_TYPE_P (caf_type)
&& GFC_TYPE_ARRAY_AKIND (caf_type) == GFC_ARRAY_ALLOCATABLE)
token = gfc_conv_descriptor_token (caf_decl);
else if (DECL_LANG_SPECIFIC (caf_decl)
&& GFC_DECL_TOKEN (caf_decl) != NULL_TREE)
token = GFC_DECL_TOKEN (caf_decl);
else
{
gcc_assert (GFC_ARRAY_TYPE_P (caf_type)
&& GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) != NULL_TREE);
token = GFC_TYPE_ARRAY_CAF_TOKEN (caf_type);
}
token = gfc_build_addr_expr (NULL_TREE, token);
tmp = build_call_expr_loc (input_location,
gfor_fndecl_caf_deregister, 4,
token, pstat, errmsg, errlen);
gfc_add_expr_to_block (&non_null, tmp);
if (status != NULL_TREE)
{
tree stat = build_fold_indirect_ref_loc (input_location, status);
TREE_USED (label_finish) = 1;
tmp = build1_v (GOTO_EXPR, label_finish);
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
stat, build_zero_cst (TREE_TYPE (stat)));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
gfc_unlikely (cond2), tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (&non_null, tmp);
}
}
return fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
gfc_finish_block (&null),
gfc_finish_block (&non_null));
}
/* Generate code for an ALLOCATE statement when the argument is an
allocatable variable. If the variable is currently allocated, it is an
error to allocate it again.
This function follows the following pseudo-code:
void *
allocate_allocatable (void *mem, size_t size, integer_type stat)
{
if (mem == NULL)
return allocate (size, stat);
else
{
if (stat)
stat = LIBERROR_ALLOCATION;
else
runtime_error ("Attempting to allocate already allocated variable");
}
}
expr must be set to the original expression being allocated for its locus
and variable name in case a runtime error has to be printed. */
void
gfc_allocate_allocatable (stmtblock_t * block, tree mem, tree size, tree token,
tree status, tree errmsg, tree errlen, tree label_finish,
gfc_expr* expr)
{
stmtblock_t alloc_block;
tree tmp, null_mem, alloc, error;
tree type = TREE_TYPE (mem);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
null_mem = gfc_unlikely (fold_build2_loc (input_location, NE_EXPR,
boolean_type_node, mem,
build_int_cst (type, 0)));
/* If mem is NULL, we call gfc_allocate_using_malloc or
gfc_allocate_using_lib. */
gfc_start_block (&alloc_block);
if (gfc_option.coarray == GFC_FCOARRAY_LIB
&& gfc_expr_attr (expr).codimension)
{
tree cond;
gfc_allocate_using_lib (&alloc_block, mem, size, token, status,
errmsg, errlen);
if (status != NULL_TREE)
{
TREE_USED (label_finish) = 1;
tmp = build1_v (GOTO_EXPR, label_finish);
cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
status, build_zero_cst (TREE_TYPE (status)));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
gfc_unlikely (cond), tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (&alloc_block, tmp);
}
}
else
gfc_allocate_using_malloc (&alloc_block, mem, size, status);
alloc = gfc_finish_block (&alloc_block);
/* If mem is not NULL, we issue a runtime error or set the
status variable. */
if (expr)
{
tree varname;
gcc_assert (expr->expr_type == EXPR_VARIABLE && expr->symtree);
varname = gfc_build_cstring_const (expr->symtree->name);
varname = gfc_build_addr_expr (pchar_type_node, varname);
error = gfc_trans_runtime_error (true, &expr->where,
"Attempting to allocate already"
" allocated variable '%s'",
varname);
}
else
error = gfc_trans_runtime_error (true, NULL,
"Attempting to allocate already allocated"
" variable");
if (status != NULL_TREE)
{
tree status_type = TREE_TYPE (status);
error = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
status, build_int_cst (status_type, LIBERROR_ALLOCATION));
}
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, null_mem,
error, alloc);
gfc_add_expr_to_block (block, tmp);
}
static tree
trans_code (gfc_code * code, tree cond)
{
stmtblock_t block;
tree res;
if (!code)
return build_empty_stmt (input_location);
gfc_start_block (&block);
/* Translate statements one by one into GENERIC trees until we reach
the end of this gfc_code branch. */
for (; code; code = code->next)
{
if (code->here != 0)
{
res = gfc_trans_label_here (code);
gfc_add_expr_to_block (&block, res);
}
gfc_set_backend_locus (&code->loc);
switch (code->op)
{
case EXEC_NOP:
case EXEC_END_BLOCK:
case EXEC_END_NESTED_BLOCK:
case EXEC_END_PROCEDURE:
res = NULL_TREE;
break;
case EXEC_ASSIGN:
if (code->expr1->ts.type == BT_CLASS)
res = gfc_trans_class_assign (code->expr1, code->expr2, code->op);
else
res = gfc_trans_assign (code);
break;
case EXEC_LABEL_ASSIGN:
res = gfc_trans_label_assign (code);
break;
case EXEC_POINTER_ASSIGN:
if (code->expr1->ts.type == BT_CLASS)
res = gfc_trans_class_assign (code->expr1, code->expr2, code->op);
else
res = gfc_trans_pointer_assign (code);
break;
case EXEC_INIT_ASSIGN:
if (code->expr1->ts.type == BT_CLASS)
res = gfc_trans_class_init_assign (code);
else
res = gfc_trans_init_assign (code);
break;
case EXEC_CONTINUE:
res = NULL_TREE;
break;
case EXEC_CRITICAL:
res = gfc_trans_critical (code);
break;
case EXEC_CYCLE:
res = gfc_trans_cycle (code);
break;
case EXEC_EXIT:
res = gfc_trans_exit (code);
break;
case EXEC_GOTO:
res = gfc_trans_goto (code);
break;
case EXEC_ENTRY:
res = gfc_trans_entry (code);
break;
case EXEC_PAUSE:
res = gfc_trans_pause (code);
break;
case EXEC_STOP:
case EXEC_ERROR_STOP:
res = gfc_trans_stop (code, code->op == EXEC_ERROR_STOP);
break;
case EXEC_CALL:
/* For MVBITS we've got the special exception that we need a
dependency check, too. */
{
bool is_mvbits = false;
if (code->resolved_isym)
{
res = gfc_conv_intrinsic_subroutine (code);
if (res != NULL_TREE)
break;
}
if (code->resolved_isym
&& code->resolved_isym->id == GFC_ISYM_MVBITS)
is_mvbits = true;
res = gfc_trans_call (code, is_mvbits, NULL_TREE,
NULL_TREE, false);
}
break;
case EXEC_CALL_PPC:
res = gfc_trans_call (code, false, NULL_TREE,
NULL_TREE, false);
break;
case EXEC_ASSIGN_CALL:
res = gfc_trans_call (code, true, NULL_TREE,
NULL_TREE, false);
break;
case EXEC_RETURN:
res = gfc_trans_return (code);
break;
case EXEC_IF:
res = gfc_trans_if (code);
break;
case EXEC_ARITHMETIC_IF:
res = gfc_trans_arithmetic_if (code);
break;
case EXEC_BLOCK:
res = gfc_trans_block_construct (code);
break;
case EXEC_DO:
res = gfc_trans_do (code, cond);
break;
case EXEC_DO_CONCURRENT:
res = gfc_trans_do_concurrent (code);
break;
case EXEC_DO_WHILE:
res = gfc_trans_do_while (code);
break;
case EXEC_SELECT:
res = gfc_trans_select (code);
break;
case EXEC_SELECT_TYPE:
/* Do nothing. SELECT TYPE statements should be transformed into
an ordinary SELECT CASE at resolution stage.
TODO: Add an error message here once this is done. */
res = NULL_TREE;
break;
case EXEC_FLUSH:
res = gfc_trans_flush (code);
break;
case EXEC_SYNC_ALL:
case EXEC_SYNC_IMAGES:
case EXEC_SYNC_MEMORY:
res = gfc_trans_sync (code, code->op);
break;
case EXEC_LOCK:
case EXEC_UNLOCK:
res = gfc_trans_lock_unlock (code, code->op);
break;
case EXEC_FORALL:
res = gfc_trans_forall (code);
break;
case EXEC_WHERE:
res = gfc_trans_where (code);
break;
case EXEC_ALLOCATE:
res = gfc_trans_allocate (code);
break;
case EXEC_DEALLOCATE:
res = gfc_trans_deallocate (code);
break;
case EXEC_OPEN:
res = gfc_trans_open (code);
break;
case EXEC_CLOSE:
res = gfc_trans_close (code);
break;
case EXEC_READ:
res = gfc_trans_read (code);
break;
case EXEC_WRITE:
res = gfc_trans_write (code);
break;
case EXEC_IOLENGTH:
res = gfc_trans_iolength (code);
break;
case EXEC_BACKSPACE:
res = gfc_trans_backspace (code);
break;
case EXEC_ENDFILE:
res = gfc_trans_endfile (code);
break;
case EXEC_INQUIRE:
res = gfc_trans_inquire (code);
break;
case EXEC_WAIT:
res = gfc_trans_wait (code);
break;
case EXEC_REWIND:
res = gfc_trans_rewind (code);
break;
case EXEC_TRANSFER:
res = gfc_trans_transfer (code);
break;
case EXEC_DT_END:
res = gfc_trans_dt_end (code);
break;
case EXEC_OMP_ATOMIC:
case EXEC_OMP_BARRIER:
case EXEC_OMP_CRITICAL:
case EXEC_OMP_DO:
case EXEC_OMP_FLUSH:
case EXEC_OMP_MASTER:
case EXEC_OMP_ORDERED:
case EXEC_OMP_PARALLEL:
case EXEC_OMP_PARALLEL_DO:
case EXEC_OMP_PARALLEL_SECTIONS:
case EXEC_OMP_PARALLEL_WORKSHARE:
case EXEC_OMP_SECTIONS:
case EXEC_OMP_SINGLE:
case EXEC_OMP_TASK:
case EXEC_OMP_TASKWAIT:
case EXEC_OMP_TASKYIELD:
case EXEC_OMP_WORKSHARE:
res = gfc_trans_omp_directive (code);
break;
default:
internal_error ("gfc_trans_code(): Bad statement code");
}
gfc_set_backend_locus (&code->loc);
if (res != NULL_TREE && ! IS_EMPTY_STMT (res))
{
if (TREE_CODE (res) != STATEMENT_LIST)
SET_EXPR_LOCATION (res, input_location);
/* Add the new statement to the block. */
gfc_add_expr_to_block (&block, res);
}
}
/* Return the finished block. */
return gfc_finish_block (&block);
}
tree
gfc_deallocate_scalar_with_status (tree pointer, tree status, bool can_fail,
gfc_expr* expr, gfc_typespec ts)
{
stmtblock_t null, non_null;
tree cond, tmp, error;
cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, pointer,
build_int_cst (TREE_TYPE (pointer), 0));
/* When POINTER is NULL, we set STATUS to 1 if it's present, otherwise
we emit a runtime error. */
gfc_start_block (&null);
if (!can_fail)
{
tree varname;
gcc_assert (expr && expr->expr_type == EXPR_VARIABLE && expr->symtree);
varname = gfc_build_cstring_const (expr->symtree->name);
varname = gfc_build_addr_expr (pchar_type_node, varname);
error = gfc_trans_runtime_error (true, &expr->where,
"Attempt to DEALLOCATE unallocated '%s'",
varname);
}
else
error = build_empty_stmt (input_location);
if (status != NULL_TREE && !integer_zerop (status))
{
tree status_type = TREE_TYPE (TREE_TYPE (status));
tree cond2;
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
status, build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, 1));
error = fold_build3_loc (input_location, COND_EXPR, void_type_node,
cond2, tmp, error);
}
gfc_add_expr_to_block (&null, error);
/* When POINTER is not NULL, we free it. */
gfc_start_block (&non_null);
/* Free allocatable components. */
if (ts.type == BT_DERIVED && ts.u.derived->attr.alloc_comp)
{
tmp = build_fold_indirect_ref_loc (input_location, pointer);
tmp = gfc_deallocate_alloc_comp (ts.u.derived, tmp, 0);
gfc_add_expr_to_block (&non_null, tmp);
}
else if (ts.type == BT_CLASS
&& ts.u.derived->components->ts.u.derived->attr.alloc_comp)
{
tmp = build_fold_indirect_ref_loc (input_location, pointer);
tmp = gfc_deallocate_alloc_comp (ts.u.derived->components->ts.u.derived,
tmp, 0);
gfc_add_expr_to_block (&non_null, tmp);
}
tmp = build_call_expr_loc (input_location,
builtin_decl_explicit (BUILT_IN_FREE), 1,
fold_convert (pvoid_type_node, pointer));
gfc_add_expr_to_block (&non_null, tmp);
if (status != NULL_TREE && !integer_zerop (status))
{
/* We set STATUS to zero if it is present. */
tree status_type = TREE_TYPE (TREE_TYPE (status));
tree cond2;
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
status, build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, 0));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond2,
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (&non_null, tmp);
}
return fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
gfc_finish_block (&null),
gfc_finish_block (&non_null));
}
/* User-deallocate; we emit the code directly from the front-end, and the
logic is the same as the previous library function:
void
deallocate (void *pointer, GFC_INTEGER_4 * stat)
{
if (!pointer)
{
if (stat)
*stat = 1;
else
runtime_error ("Attempt to DEALLOCATE unallocated memory.");
}
else
{
free (pointer);
if (stat)
*stat = 0;
}
}
In this front-end version, status doesn't have to be GFC_INTEGER_4.
Moreover, if CAN_FAIL is true, then we will not emit a runtime error,
even when no status variable is passed to us (this is used for
unconditional deallocation generated by the front-end at end of
each procedure).
If a runtime-message is possible, `expr' must point to the original
expression being deallocated for its locus and variable name. */
tree
gfc_deallocate_with_status (tree pointer, tree status, bool can_fail,
gfc_expr* expr)
{
stmtblock_t null, non_null;
tree cond, tmp, error;
cond = fold_build2 (EQ_EXPR, boolean_type_node, pointer,
build_int_cst (TREE_TYPE (pointer), 0));
/* When POINTER is NULL, we set STATUS to 1 if it's present, otherwise
we emit a runtime error. */
gfc_start_block (&null);
if (!can_fail)
{
tree varname;
gcc_assert (expr && expr->expr_type == EXPR_VARIABLE && expr->symtree);
varname = gfc_build_cstring_const (expr->symtree->name);
varname = gfc_build_addr_expr (pchar_type_node, varname);
error = gfc_trans_runtime_error (true, &expr->where,
"Attempt to DEALLOCATE unallocated '%s'",
varname);
}
else
error = build_empty_stmt (input_location);
if (status != NULL_TREE && !integer_zerop (status))
{
tree status_type = TREE_TYPE (TREE_TYPE (status));
tree cond2;
cond2 = fold_build2 (NE_EXPR, boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2 (MODIFY_EXPR, status_type,
fold_build1 (INDIRECT_REF, status_type, status),
build_int_cst (status_type, 1));
error = fold_build3 (COND_EXPR, void_type_node, cond2, tmp, error);
}
gfc_add_expr_to_block (&null, error);
/* When POINTER is not NULL, we free it. */
gfc_start_block (&non_null);
tmp = build_call_expr_loc (input_location,
built_in_decls[BUILT_IN_FREE], 1,
fold_convert (pvoid_type_node, pointer));
gfc_add_expr_to_block (&non_null, tmp);
if (status != NULL_TREE && !integer_zerop (status))
{
/* We set STATUS to zero if it is present. */
tree status_type = TREE_TYPE (TREE_TYPE (status));
tree cond2;
cond2 = fold_build2 (NE_EXPR, boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0));
tmp = fold_build2 (MODIFY_EXPR, status_type,
fold_build1 (INDIRECT_REF, status_type, status),
build_int_cst (status_type, 0));
tmp = fold_build3 (COND_EXPR, void_type_node, cond2, tmp,
build_empty_stmt (input_location));
gfc_add_expr_to_block (&non_null, tmp);
}
return fold_build3 (COND_EXPR, void_type_node, cond,
gfc_finish_block (&null), gfc_finish_block (&non_null));
}
/* Allocate memory, using an optional status argument.
This function follows the following pseudo-code:
void *
allocate (size_t size, integer_type* stat)
{
void *newmem;
if (stat)
*stat = 0;
newmem = malloc (MAX (size, 1));
if (newmem == NULL)
{
if (stat)
*stat = LIBERROR_ALLOCATION;
else
runtime_error ("Allocation would exceed memory limit");
}
return newmem;
} */
tree
gfc_allocate_with_status (stmtblock_t * block, tree size, tree status)
{
stmtblock_t alloc_block;
tree res, tmp, msg, cond;
tree status_type = status ? TREE_TYPE (TREE_TYPE (status)) : NULL_TREE;
/* Evaluate size only once, and make sure it has the right type. */
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* Create a variable to hold the result. */
res = gfc_create_var (prvoid_type_node, NULL);
/* Set the optional status variable to zero. */
if (status != NULL_TREE && !integer_zerop (status))
{
tmp = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, 0));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
fold_build2_loc (input_location, NE_EXPR,
boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0)),
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
}
/* The allocation itself. */
gfc_start_block (&alloc_block);
gfc_add_modify (&alloc_block, res,
fold_convert (prvoid_type_node,
build_call_expr_loc (input_location,
built_in_decls[BUILT_IN_MALLOC], 1,
fold_build2_loc (input_location,
MAX_EXPR, size_type_node, size,
build_int_cst (size_type_node,
1)))));
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Allocation would exceed memory limit"));
tmp = build_call_expr_loc (input_location,
gfor_fndecl_os_error, 1, msg);
if (status != NULL_TREE && !integer_zerop (status))
{
/* Set the status variable if it's present. */
tree tmp2;
cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node,
status, build_int_cst (TREE_TYPE (status), 0));
tmp2 = fold_build2_loc (input_location, MODIFY_EXPR, status_type,
fold_build1_loc (input_location, INDIRECT_REF,
status_type, status),
build_int_cst (status_type, LIBERROR_ALLOCATION));
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
tmp, tmp2);
}
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
fold_build2_loc (input_location, EQ_EXPR,
boolean_type_node, res,
build_int_cst (prvoid_type_node, 0)),
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (&alloc_block, tmp);
gfc_add_expr_to_block (block, gfc_finish_block (&alloc_block));
return res;
}
tree
gfc_trans_code (gfc_code * code)
{
stmtblock_t block;
tree res;
if (!code)
return build_empty_stmt ();
gfc_start_block (&block);
/* Translate statements one by one to GIMPLE trees until we reach
the end of this gfc_code branch. */
for (; code; code = code->next)
{
if (code->here != 0)
{
res = gfc_trans_label_here (code);
gfc_add_expr_to_block (&block, res);
}
switch (code->op)
{
case EXEC_NOP:
res = NULL_TREE;
break;
case EXEC_ASSIGN:
res = gfc_trans_assign (code);
break;
case EXEC_LABEL_ASSIGN:
res = gfc_trans_label_assign (code);
break;
case EXEC_POINTER_ASSIGN:
res = gfc_trans_pointer_assign (code);
break;
case EXEC_INIT_ASSIGN:
res = gfc_trans_init_assign (code);
break;
case EXEC_CONTINUE:
res = NULL_TREE;
break;
case EXEC_CYCLE:
res = gfc_trans_cycle (code);
break;
case EXEC_EXIT:
res = gfc_trans_exit (code);
break;
case EXEC_GOTO:
res = gfc_trans_goto (code);
break;
case EXEC_ENTRY:
res = gfc_trans_entry (code);
break;
case EXEC_PAUSE:
res = gfc_trans_pause (code);
break;
case EXEC_STOP:
res = gfc_trans_stop (code);
break;
case EXEC_CALL:
res = gfc_trans_call (code, false);
break;
case EXEC_ASSIGN_CALL:
res = gfc_trans_call (code, true);
break;
case EXEC_RETURN:
res = gfc_trans_return (code);
break;
case EXEC_IF:
res = gfc_trans_if (code);
break;
case EXEC_ARITHMETIC_IF:
res = gfc_trans_arithmetic_if (code);
break;
case EXEC_DO:
res = gfc_trans_do (code);
break;
case EXEC_DO_WHILE:
res = gfc_trans_do_while (code);
break;
case EXEC_SELECT:
res = gfc_trans_select (code);
break;
case EXEC_FLUSH:
res = gfc_trans_flush (code);
break;
case EXEC_FORALL:
res = gfc_trans_forall (code);
break;
case EXEC_WHERE:
res = gfc_trans_where (code);
break;
case EXEC_ALLOCATE:
res = gfc_trans_allocate (code);
break;
case EXEC_DEALLOCATE:
res = gfc_trans_deallocate (code);
break;
case EXEC_OPEN:
res = gfc_trans_open (code);
break;
case EXEC_CLOSE:
res = gfc_trans_close (code);
break;
case EXEC_READ:
res = gfc_trans_read (code);
break;
case EXEC_WRITE:
res = gfc_trans_write (code);
break;
case EXEC_IOLENGTH:
res = gfc_trans_iolength (code);
break;
case EXEC_BACKSPACE:
res = gfc_trans_backspace (code);
break;
case EXEC_ENDFILE:
res = gfc_trans_endfile (code);
break;
case EXEC_INQUIRE:
res = gfc_trans_inquire (code);
break;
case EXEC_REWIND:
res = gfc_trans_rewind (code);
break;
case EXEC_TRANSFER:
res = gfc_trans_transfer (code);
break;
case EXEC_DT_END:
res = gfc_trans_dt_end (code);
break;
case EXEC_OMP_ATOMIC:
case EXEC_OMP_BARRIER:
case EXEC_OMP_CRITICAL:
case EXEC_OMP_DO:
case EXEC_OMP_FLUSH:
case EXEC_OMP_MASTER:
case EXEC_OMP_ORDERED:
case EXEC_OMP_PARALLEL:
case EXEC_OMP_PARALLEL_DO:
case EXEC_OMP_PARALLEL_SECTIONS:
case EXEC_OMP_PARALLEL_WORKSHARE:
case EXEC_OMP_SECTIONS:
case EXEC_OMP_SINGLE:
case EXEC_OMP_WORKSHARE:
res = gfc_trans_omp_directive (code);
break;
default:
internal_error ("gfc_trans_code(): Bad statement code");
}
gfc_set_backend_locus (&code->loc);
if (res != NULL_TREE && ! IS_EMPTY_STMT (res))
{
if (TREE_CODE (res) == STATEMENT_LIST)
annotate_all_with_locus (&res, input_location);
else
SET_EXPR_LOCATION (res, input_location);
/* Add the new statement to the block. */
gfc_add_expr_to_block (&block, res);
}
}
/* Return the finished block. */
return gfc_finish_block (&block);
}
int
cp_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p)
{
int saved_stmts_are_full_exprs_p = 0;
enum tree_code code = TREE_CODE (*expr_p);
enum gimplify_status ret;
if (STATEMENT_CODE_P (code))
{
saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
current_stmt_tree ()->stmts_are_full_exprs_p
= STMT_IS_FULL_EXPR_P (*expr_p);
}
switch (code)
{
case PTRMEM_CST:
*expr_p = cplus_expand_constant (*expr_p);
ret = GS_OK;
break;
case AGGR_INIT_EXPR:
simplify_aggr_init_expr (expr_p);
ret = GS_OK;
break;
case THROW_EXPR:
/* FIXME communicate throw type to backend, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
gimplify_must_not_throw_expr (expr_p, pre_p);
ret = GS_OK;
break;
case INIT_EXPR:
case MODIFY_EXPR:
cp_gimplify_init_expr (expr_p, pre_p, post_p);
ret = GS_OK;
break;
case EMPTY_CLASS_EXPR:
/* We create an INTEGER_CST with RECORD_TYPE and value zero. */
*expr_p = build_int_cst (TREE_TYPE (*expr_p), 0);
ret = GS_OK;
break;
case BASELINK:
*expr_p = BASELINK_FUNCTIONS (*expr_p);
ret = GS_OK;
break;
case TRY_BLOCK:
genericize_try_block (expr_p);
ret = GS_OK;
break;
case HANDLER:
genericize_catch_block (expr_p);
ret = GS_OK;
break;
case EH_SPEC_BLOCK:
genericize_eh_spec_block (expr_p);
ret = GS_OK;
break;
case USING_STMT:
/* Just ignore for now. Eventually we will want to pass this on to
the debugger. */
*expr_p = build_empty_stmt ();
ret = GS_ALL_DONE;
break;
case IF_STMT:
gimplify_if_stmt (expr_p);
ret = GS_OK;
break;
default:
ret = c_gimplify_expr (expr_p, pre_p, post_p);
break;
}
/* Restore saved state. */
if (STATEMENT_CODE_P (code))
current_stmt_tree ()->stmts_are_full_exprs_p
= saved_stmts_are_full_exprs_p;
return ret;
}
static tree
expand_cilk_sync (void)
{
tree frame = cfun->cilk_frame_decl;
/* Cilk_sync is converted to the following code:
sf.pedigree = sf.worker->pedigree;
if (frame.flags & CILK_FRAME_UNSYNCHED)
{
__cilkrts_save_fp_state (&sf);
if (!builtin_setjmp (sf.ctx)
__cilkrts_sync (&sf);
else
if (sf.flags & CILK_FRAME_EXCEPTING)
__cilkrts_rethrow (&sf);
}
sf.worker->pedigree.rank = sf.worker->pedigree.rank + 1; */
tree flags = cilk_dot (frame, CILK_TI_FRAME_FLAGS, false);
tree unsynched = fold_build2 (BIT_AND_EXPR, TREE_TYPE (flags), flags,
build_int_cst (TREE_TYPE (flags),
CILK_FRAME_UNSYNCHED));
unsynched = fold_build2 (NE_EXPR, TREE_TYPE (unsynched), unsynched,
build_int_cst (TREE_TYPE (unsynched), 0));
tree frame_addr = build1 (ADDR_EXPR, cilk_frame_ptr_type_decl, frame);
/* Check if exception (0x10) bit is set in the sf->flags. */
tree except_flag = fold_build2 (BIT_AND_EXPR, TREE_TYPE (flags), flags,
build_int_cst (TREE_TYPE (flags),
CILK_FRAME_EXCEPTING));
except_flag = fold_build2 (NE_EXPR, TREE_TYPE (except_flag), except_flag,
build_int_cst (TREE_TYPE (except_flag), 0));
/* If the exception flag is set then call the __cilkrts_rethrow (&sf). */
tree except_cond = fold_build3 (COND_EXPR, void_type_node, except_flag,
build_call_expr (cilk_rethrow_fndecl, 1,
frame_addr),
build_empty_stmt (EXPR_LOCATION (unsynched)));
tree sync_expr = build_call_expr (cilk_sync_fndecl, 1, frame_addr);
tree setjmp_expr = cilk_call_setjmp (frame);
setjmp_expr = fold_build2 (EQ_EXPR, TREE_TYPE (setjmp_expr), setjmp_expr,
build_int_cst (TREE_TYPE (setjmp_expr), 0));
setjmp_expr = fold_build3 (COND_EXPR, void_type_node, setjmp_expr,
sync_expr, except_cond);
tree sync_list = alloc_stmt_list ();
append_to_statement_list (build_call_expr (cilk_save_fp_fndecl, 1,
frame_addr), &sync_list);
append_to_statement_list (setjmp_expr, &sync_list);
tree sync = fold_build3 (COND_EXPR, void_type_node, unsynched, sync_list,
build_empty_stmt (EXPR_LOCATION (unsynched)));
tree parent_pedigree = cilk_dot (frame, CILK_TI_FRAME_PEDIGREE, false);
tree worker = cilk_dot (frame, CILK_TI_FRAME_WORKER, false);
tree worker_pedigree = cilk_arrow (worker, CILK_TI_WORKER_PEDIGREE, false);
tree assign_pedigree = fold_build2 (MODIFY_EXPR, void_type_node,
parent_pedigree, worker_pedigree);
tree w_ped_rank = cilk_dot (unshare_expr (worker_pedigree),
CILK_TI_PEDIGREE_RANK, false);
tree incr_ped_rank = fold_build2 (PLUS_EXPR, TREE_TYPE (w_ped_rank),
w_ped_rank,
build_one_cst (TREE_TYPE (w_ped_rank)));
incr_ped_rank = fold_build2 (MODIFY_EXPR, void_type_node, w_ped_rank,
incr_ped_rank);
tree ret_sync_exp = alloc_stmt_list ();
append_to_statement_list (assign_pedigree, &ret_sync_exp);
append_to_statement_list (sync, &ret_sync_exp);
append_to_statement_list (incr_ped_rank, &ret_sync_exp);
return ret_sync_exp;
}
int
cp_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p)
{
int saved_stmts_are_full_exprs_p = 0;
enum tree_code code = TREE_CODE (*expr_p);
enum gimplify_status ret;
if (STATEMENT_CODE_P (code))
{
saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
current_stmt_tree ()->stmts_are_full_exprs_p
= STMT_IS_FULL_EXPR_P (*expr_p);
}
switch (code)
{
case PTRMEM_CST:
*expr_p = cplus_expand_constant (*expr_p);
ret = GS_OK;
break;
case AGGR_INIT_EXPR:
simplify_aggr_init_expr (expr_p);
ret = GS_OK;
break;
case THROW_EXPR:
/* FIXME communicate throw type to backend, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
gimplify_must_not_throw_expr (expr_p, pre_p);
ret = GS_OK;
break;
/* We used to do this for MODIFY_EXPR as well, but that's unsafe; the
LHS of an assignment might also be involved in the RHS, as in bug
25979. */
case INIT_EXPR:
cp_gimplify_init_expr (expr_p, pre_p, post_p);
ret = GS_OK;
break;
case EMPTY_CLASS_EXPR:
/* We create an empty CONSTRUCTOR with RECORD_TYPE. */
*expr_p = build_constructor (TREE_TYPE (*expr_p), NULL);
ret = GS_OK;
break;
case BASELINK:
*expr_p = BASELINK_FUNCTIONS (*expr_p);
ret = GS_OK;
break;
case TRY_BLOCK:
genericize_try_block (expr_p);
ret = GS_OK;
break;
case HANDLER:
genericize_catch_block (expr_p);
ret = GS_OK;
break;
case EH_SPEC_BLOCK:
genericize_eh_spec_block (expr_p);
ret = GS_OK;
break;
case USING_STMT:
/* Just ignore for now. Eventually we will want to pass this on to
the debugger. */
*expr_p = build_empty_stmt ();
ret = GS_ALL_DONE;
break;
case IF_STMT:
gimplify_if_stmt (expr_p);
ret = GS_OK;
break;
case FOR_STMT:
gimplify_for_stmt (expr_p, pre_p);
ret = GS_ALL_DONE;
break;
case WHILE_STMT:
gimplify_while_stmt (expr_p);
ret = GS_ALL_DONE;
break;
case DO_STMT:
gimplify_do_stmt (expr_p);
ret = GS_ALL_DONE;
break;
case SWITCH_STMT:
gimplify_switch_stmt (expr_p);
ret = GS_ALL_DONE;
break;
case CONTINUE_STMT:
*expr_p = build_bc_goto (bc_continue);
ret = GS_ALL_DONE;
break;
case BREAK_STMT:
*expr_p = build_bc_goto (bc_break);
ret = GS_ALL_DONE;
break;
case EXPR_STMT:
gimplify_expr_stmt (expr_p);
ret = GS_OK;
break;
case UNARY_PLUS_EXPR:
{
tree arg = TREE_OPERAND (*expr_p, 0);
tree type = TREE_TYPE (*expr_p);
*expr_p = (TREE_TYPE (arg) != type) ? fold_convert (type, arg)
: arg;
ret = GS_OK;
}
break;
default:
ret = c_gimplify_expr (expr_p, pre_p, post_p);
break;
}
/* Restore saved state. */
if (STATEMENT_CODE_P (code))
current_stmt_tree ()->stmts_are_full_exprs_p
= saved_stmts_are_full_exprs_p;
return ret;
}
bool
gfc_add_finalizer_call (stmtblock_t *block, gfc_expr *expr2)
{
tree tmp;
gfc_ref *ref;
gfc_expr *expr;
gfc_expr *final_expr = NULL;
gfc_expr *elem_size = NULL;
bool has_finalizer = false;
if (!expr2 || (expr2->ts.type != BT_DERIVED && expr2->ts.type != BT_CLASS))
return false;
if (expr2->ts.type == BT_DERIVED)
{
gfc_is_finalizable (expr2->ts.u.derived, &final_expr);
if (!final_expr)
return false;
}
/* If we have a class array, we need go back to the class
container. */
expr = gfc_copy_expr (expr2);
if (expr->ref && expr->ref->next && !expr->ref->next->next
&& expr->ref->next->type == REF_ARRAY
&& expr->ref->type == REF_COMPONENT
&& strcmp (expr->ref->u.c.component->name, "_data") == 0)
{
gfc_free_ref_list (expr->ref);
expr->ref = NULL;
}
else
for (ref = expr->ref; ref; ref = ref->next)
if (ref->next && ref->next->next && !ref->next->next->next
&& ref->next->next->type == REF_ARRAY
&& ref->next->type == REF_COMPONENT
&& strcmp (ref->next->u.c.component->name, "_data") == 0)
{
gfc_free_ref_list (ref->next);
ref->next = NULL;
}
if (expr->ts.type == BT_CLASS)
{
has_finalizer = gfc_is_finalizable (expr->ts.u.derived, NULL);
if (!expr2->rank && !expr2->ref && CLASS_DATA (expr2->symtree->n.sym)->as)
expr->rank = CLASS_DATA (expr2->symtree->n.sym)->as->rank;
final_expr = gfc_copy_expr (expr);
gfc_add_vptr_component (final_expr);
gfc_add_component_ref (final_expr, "_final");
elem_size = gfc_copy_expr (expr);
gfc_add_vptr_component (elem_size);
gfc_add_component_ref (elem_size, "_size");
}
gcc_assert (final_expr->expr_type == EXPR_VARIABLE);
tmp = gfc_build_final_call (expr->ts, final_expr, expr,
false, elem_size);
if (expr->ts.type == BT_CLASS && !has_finalizer)
{
tree cond;
gfc_se se;
gfc_init_se (&se, NULL);
se.want_pointer = 1;
gfc_conv_expr (&se, final_expr);
cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
se.expr, build_int_cst (TREE_TYPE (se.expr), 0));
/* For CLASS(*) not only sym->_vtab->_final can be NULL
but already sym->_vtab itself. */
if (UNLIMITED_POLY (expr))
{
tree cond2;
gfc_expr *vptr_expr;
vptr_expr = gfc_copy_expr (expr);
gfc_add_vptr_component (vptr_expr);
gfc_init_se (&se, NULL);
se.want_pointer = 1;
gfc_conv_expr (&se, vptr_expr);
gfc_free_expr (vptr_expr);
cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
se.expr,
build_int_cst (TREE_TYPE (se.expr), 0));
cond = fold_build2_loc (input_location, TRUTH_ANDIF_EXPR,
boolean_type_node, cond2, cond);
}
tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
cond, tmp, build_empty_stmt (input_location));
}
gfc_add_expr_to_block (block, tmp);
return true;
}
/* Allocate memory, using an optional status argument.
This function follows the following pseudo-code:
void *
allocate (size_t size, integer_type* stat)
{
void *newmem;
if (stat)
*stat = 0;
// The only time this can happen is the size wraps around.
if (size < 0)
{
if (stat)
{
*stat = LIBERROR_ALLOCATION;
newmem = NULL;
}
else
runtime_error ("Attempt to allocate negative amount of memory. "
"Possible integer overflow");
}
else
{
newmem = malloc (MAX (size, 1));
if (newmem == NULL)
{
if (stat)
*stat = LIBERROR_ALLOCATION;
else
runtime_error ("Out of memory");
}
}
return newmem;
} */
tree
gfc_allocate_with_status (stmtblock_t * block, tree size, tree status)
{
stmtblock_t alloc_block;
tree res, tmp, error, msg, cond;
tree status_type = status ? TREE_TYPE (TREE_TYPE (status)) : NULL_TREE;
/* Evaluate size only once, and make sure it has the right type. */
size = gfc_evaluate_now (size, block);
if (TREE_TYPE (size) != TREE_TYPE (size_type_node))
size = fold_convert (size_type_node, size);
/* Create a variable to hold the result. */
res = gfc_create_var (prvoid_type_node, NULL);
/* Set the optional status variable to zero. */
if (status != NULL_TREE && !integer_zerop (status))
{
tmp = fold_build2 (MODIFY_EXPR, status_type,
fold_build1 (INDIRECT_REF, status_type, status),
build_int_cst (status_type, 0));
tmp = fold_build3 (COND_EXPR, void_type_node,
fold_build2 (NE_EXPR, boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0)),
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (block, tmp);
}
/* Generate the block of code handling (size < 0). */
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Attempt to allocate negative amount of memory. "
"Possible integer overflow"));
error = build_call_expr_loc (input_location,
gfor_fndecl_runtime_error, 1, msg);
if (status != NULL_TREE && !integer_zerop (status))
{
/* Set the status variable if it's present. */
stmtblock_t set_status_block;
gfc_start_block (&set_status_block);
gfc_add_modify (&set_status_block,
fold_build1 (INDIRECT_REF, status_type, status),
build_int_cst (status_type, LIBERROR_ALLOCATION));
gfc_add_modify (&set_status_block, res,
build_int_cst (prvoid_type_node, 0));
tmp = fold_build2 (EQ_EXPR, boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0));
error = fold_build3 (COND_EXPR, void_type_node, tmp, error,
gfc_finish_block (&set_status_block));
}
/* The allocation itself. */
gfc_start_block (&alloc_block);
gfc_add_modify (&alloc_block, res,
fold_convert (prvoid_type_node,
build_call_expr_loc (input_location,
built_in_decls[BUILT_IN_MALLOC], 1,
fold_build2 (MAX_EXPR, size_type_node,
size,
build_int_cst (size_type_node, 1)))));
msg = gfc_build_addr_expr (pchar_type_node, gfc_build_localized_cstring_const
("Out of memory"));
tmp = build_call_expr_loc (input_location,
gfor_fndecl_os_error, 1, msg);
if (status != NULL_TREE && !integer_zerop (status))
{
/* Set the status variable if it's present. */
tree tmp2;
cond = fold_build2 (EQ_EXPR, boolean_type_node, status,
build_int_cst (TREE_TYPE (status), 0));
tmp2 = fold_build2 (MODIFY_EXPR, status_type,
fold_build1 (INDIRECT_REF, status_type, status),
build_int_cst (status_type, LIBERROR_ALLOCATION));
tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp,
tmp2);
}
tmp = fold_build3 (COND_EXPR, void_type_node,
fold_build2 (EQ_EXPR, boolean_type_node, res,
build_int_cst (prvoid_type_node, 0)),
tmp, build_empty_stmt (input_location));
gfc_add_expr_to_block (&alloc_block, tmp);
cond = fold_build2 (LT_EXPR, boolean_type_node, size,
build_int_cst (TREE_TYPE (size), 0));
tmp = fold_build3 (COND_EXPR, void_type_node, cond, error,
gfc_finish_block (&alloc_block));
gfc_add_expr_to_block (block, tmp);
return res;
}