static tree
fold_cplus_constants (const_tree c)
{
tree folded_elems, elems = CONST_CAST_TREE (c);
int vec_len, i;
if (elems == NULL_TREE || elems == error_mark_node)
return elems;
vec_len = TREE_VEC_LENGTH (elems);
/* First check if there is at least one element that needs
folding. If there is none, we just return ELEMS. Otherwise create
and return a new tree vector that contains the folded versions of
ELEMS. This is to avoid allocating memory if we don't need
to. */
for (i = 0; i < vec_len; ++i)
{
if (template_arg_needs_folding (TREE_VEC_ELT (elems, i)))
break;
}
if (i == vec_len)
return elems;
folded_elems = make_tree_vec (vec_len);
for (i = 0; i < vec_len; ++i)
{
tree elem = TREE_VEC_ELT (elems, i);
TREE_VEC_ELT (folded_elems, i) =
(elem && !TYPE_P (elem)) ? cplus_expand_constant (elem) : elem;
}
return folded_elems;
}
tree
cplus_expand_constant (tree cst)
{
switch (TREE_CODE (cst))
{
case PTRMEM_CST:
{
tree type = TREE_TYPE (cst);
tree member;
/* Find the member. */
member = PTRMEM_CST_MEMBER (cst);
/* We can't lower this until the class is complete. */
if (!COMPLETE_TYPE_P (DECL_CONTEXT (member)))
return cst;
if (TREE_CODE (member) == FIELD_DECL)
{
/* Find the offset for the field. */
cst = byte_position (member);
while (!same_type_p (DECL_CONTEXT (member),
TYPE_PTRMEM_CLASS_TYPE (type)))
{
/* The MEMBER must have been nestled within an
anonymous aggregate contained in TYPE. Find the
anonymous aggregate. */
member = lookup_anon_field (TYPE_PTRMEM_CLASS_TYPE (type),
DECL_CONTEXT (member));
cst = size_binop (PLUS_EXPR, cst, byte_position (member));
}
cst = fold (build_nop (type, cst));
}
else
{
tree delta;
tree pfn;
expand_ptrmemfunc_cst (cst, &delta, &pfn);
cst = build_ptrmemfunc1 (type, delta, pfn);
}
}
break;
case CONSTRUCTOR:
{
constructor_elt *elt;
unsigned HOST_WIDE_INT idx;
FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (cst), idx, elt)
elt->value = cplus_expand_constant (elt->value);
}
default:
/* There's nothing to do. */
break;
}
return cst;
}
rtx
cxx_expand_expr (tree exp, rtx target, enum machine_mode tmode, int modifier,
rtx *alt_rtl)
{
tree type = TREE_TYPE (exp);
enum machine_mode mode = TYPE_MODE (type);
enum tree_code code = TREE_CODE (exp);
/* No sense saving up arithmetic to be done
if it's all in the wrong mode to form part of an address.
And force_operand won't know whether to sign-extend or zero-extend. */
if (mode != Pmode && modifier == EXPAND_SUM)
modifier = EXPAND_NORMAL;
switch (code)
{
case PTRMEM_CST:
return expand_expr (cplus_expand_constant (exp),
target, tmode, modifier);
case OFFSET_REF:
/* Offset refs should not make it through to here. */
abort ();
case EMPTY_CLASS_EXPR:
/* We don't need to generate any code for an empty class. */
return const0_rtx;
case BASELINK:
return expand_expr (BASELINK_FUNCTIONS (exp), target, tmode,
modifier);
default:
return c_expand_expr (exp, target, tmode, modifier, alt_rtl);
}
}
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;
}
static tree
cp_convert_to_pointer (tree type, tree expr, bool force)
{
tree intype = TREE_TYPE (expr);
enum tree_code form;
tree rval;
if (intype == error_mark_node)
return error_mark_node;
if (IS_AGGR_TYPE (intype))
{
intype = complete_type (intype);
if (!COMPLETE_TYPE_P (intype))
{
error ("can't convert from incomplete type `%T' to `%T'",
intype, type);
return error_mark_node;
}
rval = build_type_conversion (type, expr);
if (rval)
{
if (rval == error_mark_node)
error ("conversion of `%E' from `%T' to `%T' is ambiguous",
expr, intype, type);
return rval;
}
}
/* Handle anachronistic conversions from (::*)() to cv void* or (*)(). */
if (TREE_CODE (type) == POINTER_TYPE
&& (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE
|| VOID_TYPE_P (TREE_TYPE (type))))
{
/* Allow an implicit this pointer for pointer to member
functions. */
if (TYPE_PTRMEMFUNC_P (intype))
{
if (pedantic || warn_pmf2ptr)
pedwarn ("converting from `%T' to `%T'", intype, type);
if (TREE_CODE (expr) == PTRMEM_CST)
expr = build_address (PTRMEM_CST_MEMBER (expr));
else
{
tree decl = maybe_dummy_object (TYPE_PTRMEM_CLASS_TYPE (intype),
0);
decl = build_address (decl);
expr = get_member_function_from_ptrfunc (&decl, expr);
}
}
else if (TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE)
{
if (pedantic || warn_pmf2ptr)
pedwarn ("converting from `%T' to `%T'", intype, type);
expr = build_addr_func (expr);
}
if (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE)
return build_nop (type, expr);
intype = TREE_TYPE (expr);
}
if (expr == error_mark_node)
return error_mark_node;
form = TREE_CODE (intype);
if (POINTER_TYPE_P (intype))
{
intype = TYPE_MAIN_VARIANT (intype);
if (TYPE_MAIN_VARIANT (type) != intype
&& TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (type)) == RECORD_TYPE
&& IS_AGGR_TYPE (TREE_TYPE (type))
&& IS_AGGR_TYPE (TREE_TYPE (intype))
&& TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE)
{
enum tree_code code = PLUS_EXPR;
tree binfo;
tree intype_class;
tree type_class;
bool same_p;
intype_class = TREE_TYPE (intype);
type_class = TREE_TYPE (type);
same_p = same_type_p (TYPE_MAIN_VARIANT (intype_class),
TYPE_MAIN_VARIANT (type_class));
binfo = NULL_TREE;
/* Try derived to base conversion. */
if (!same_p)
binfo = lookup_base (intype_class, type_class, ba_check, NULL);
if (!same_p && !binfo)
{
/* Try base to derived conversion. */
binfo = lookup_base (type_class, intype_class, ba_check, NULL);
code = MINUS_EXPR;
}
if (binfo == error_mark_node)
return error_mark_node;
if (binfo || same_p)
{
if (binfo)
expr = build_base_path (code, expr, binfo, 0);
/* Add any qualifier conversions. */
return build_nop (type, expr);
}
}
if (TYPE_PTRMEMFUNC_P (type))
{
error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
return build_nop (type, expr);
}
else if (TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype))
{
tree b1;
tree b2;
tree binfo;
enum tree_code code = PLUS_EXPR;
base_kind bk;
b1 = TYPE_PTRMEM_CLASS_TYPE (type);
b2 = TYPE_PTRMEM_CLASS_TYPE (intype);
binfo = lookup_base (b1, b2, ba_check, &bk);
if (!binfo)
{
binfo = lookup_base (b2, b1, ba_check, &bk);
code = MINUS_EXPR;
}
if (binfo == error_mark_node)
return error_mark_node;
if (bk == bk_via_virtual)
{
if (force)
warning ("pointer to member cast from `%T' to `%T' is via virtual base",
intype, type);
else
{
error ("pointer to member cast from `%T' to `%T' is via virtual base",
intype, type);
return error_mark_node;
}
/* This is a reinterpret cast, whose result is unspecified.
We choose to do nothing. */
return build1 (NOP_EXPR, type, expr);
}
if (TREE_CODE (expr) == PTRMEM_CST)
expr = cplus_expand_constant (expr);
if (binfo && !integer_zerop (BINFO_OFFSET (binfo)))
expr = size_binop (code,
build_nop (sizetype, expr),
BINFO_OFFSET (binfo));
return build_nop (type, expr);
}
else if (TYPE_PTRMEMFUNC_P (type) && TYPE_PTRMEMFUNC_P (intype))
return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr, 0);
else if (TYPE_PTRMEMFUNC_P (intype))
{
if (!warn_pmf2ptr)
{
if (TREE_CODE (expr) == PTRMEM_CST)
return cp_convert_to_pointer (type,
PTRMEM_CST_MEMBER (expr),
force);
else if (TREE_CODE (expr) == OFFSET_REF)
{
tree object = TREE_OPERAND (expr, 0);
return get_member_function_from_ptrfunc (&object,
TREE_OPERAND (expr, 1));
}
}
error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
if (integer_zerop (expr))
{
if (TYPE_PTRMEMFUNC_P (type))
return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr, 0);
if (TYPE_PTRMEM_P (type))
/* A NULL pointer-to-member is represented by -1, not by
zero. */
expr = build_int_2 (-1, -1);
else
expr = build_int_2 (0, 0);
TREE_TYPE (expr) = type;
/* Fix up the representation of -1 if appropriate. */
force_fit_type (expr, 0);
return expr;
}
else if (TYPE_PTR_TO_MEMBER_P (type) && INTEGRAL_CODE_P (form))
{
error ("invalid conversion from '%T' to '%T'", intype, type);
return error_mark_node;
}
if (INTEGRAL_CODE_P (form))
{
if (TYPE_PRECISION (intype) == POINTER_SIZE)
return build1 (CONVERT_EXPR, type, expr);
expr = cp_convert (c_common_type_for_size (POINTER_SIZE, 0), expr);
/* Modes may be different but sizes should be the same. */
if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (expr)))
!= GET_MODE_SIZE (TYPE_MODE (type)))
/* There is supposed to be some integral type
that is the same width as a pointer. */
abort ();
return convert_to_pointer (type, expr);
}
if (type_unknown_p (expr))
return instantiate_type (type, expr, tf_error | tf_warning);
error ("cannot convert `%E' from type `%T' to type `%T'",
expr, intype, type);
return error_mark_node;
}
int
cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
int saved_stmts_are_full_exprs_p = 0;
enum tree_code code = TREE_CODE (*expr_p);
enum gimplify_status ret;
tree block = NULL;
VEC(gimple, heap) *bind_expr_stack = NULL;
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 back end, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
ret = gimplify_must_not_throw_expr (expr_p, pre_p);
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:
/* Get the innermost inclosing GIMPLE_BIND that has a non NULL
BLOCK, and append an IMPORTED_DECL to its
BLOCK_VARS chained list. */
bind_expr_stack = gimple_bind_expr_stack ();
if (bind_expr_stack)
{
int i;
for (i = VEC_length (gimple, bind_expr_stack) - 1; i >= 0; i--)
if ((block = gimple_bind_block (VEC_index (gimple,
bind_expr_stack,
i))))
break;
}
if (block)
{
tree using_directive;
gcc_assert (TREE_OPERAND (*expr_p, 0));
using_directive = make_node (IMPORTED_DECL);
TREE_TYPE (using_directive) = void_type_node;
IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
= TREE_OPERAND (*expr_p, 0);
TREE_CHAIN (using_directive) = BLOCK_VARS (block);
BLOCK_VARS (block) = using_directive;
}
/* The USING_STMT won't appear in GIMPLE. */
*expr_p = NULL;
ret = GS_ALL_DONE;
break;
case FOR_STMT:
gimplify_for_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case WHILE_STMT:
gimplify_while_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case DO_STMT:
gimplify_do_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case SWITCH_STMT:
gimplify_switch_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case OMP_FOR:
ret = cp_gimplify_omp_for (expr_p, pre_p);
break;
case CONTINUE_STMT:
gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_CONTINUE, NOT_TAKEN));
gimple_seq_add_stmt (pre_p, gimple_build_goto (get_bc_label (bc_continue)));
*expr_p = NULL_TREE;
ret = GS_ALL_DONE;
break;
case BREAK_STMT:
gimple_seq_add_stmt (pre_p, gimple_build_goto (get_bc_label (bc_break)));
*expr_p = NULL_TREE;
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;
}
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;
}
int
cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *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 VEC_INIT_EXPR:
{
location_t loc = input_location;
tree init = VEC_INIT_EXPR_INIT (*expr_p);
int from_array = (init && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE);
gcc_assert (EXPR_HAS_LOCATION (*expr_p));
input_location = EXPR_LOCATION (*expr_p);
*expr_p = build_vec_init (VEC_INIT_EXPR_SLOT (*expr_p), NULL_TREE,
init, VEC_INIT_EXPR_VALUE_INIT (*expr_p),
from_array,
tf_warning_or_error);
cp_genericize_tree (expr_p);
ret = GS_OK;
input_location = loc;
}
break;
case THROW_EXPR:
/* FIXME communicate throw type to back end, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
ret = gimplify_must_not_throw_expr (expr_p, pre_p);
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:
if (fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p)
&& !seen_error ())
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
cp_gimplify_init_expr (expr_p);
if (TREE_CODE (*expr_p) != INIT_EXPR)
return GS_OK;
/* Otherwise fall through. */
case MODIFY_EXPR:
{
if (fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p)
&& !seen_error ())
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
/* If the back end isn't clever enough to know that the lhs and rhs
types are the same, add an explicit conversion. */
tree op0 = TREE_OPERAND (*expr_p, 0);
tree op1 = TREE_OPERAND (*expr_p, 1);
if (!error_operand_p (op0)
&& !error_operand_p (op1)
&& (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (op0))
|| TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (op1)))
&& !useless_type_conversion_p (TREE_TYPE (op1), TREE_TYPE (op0)))
TREE_OPERAND (*expr_p, 1) = build1 (VIEW_CONVERT_EXPR,
TREE_TYPE (op0), op1);
else if ((is_gimple_lvalue (op1) || INDIRECT_REF_P (op1)
|| (TREE_CODE (op1) == CONSTRUCTOR
&& CONSTRUCTOR_NELTS (op1) == 0
&& !TREE_CLOBBER_P (op1))
|| (TREE_CODE (op1) == CALL_EXPR
&& !CALL_EXPR_RETURN_SLOT_OPT (op1)))
&& is_really_empty_class (TREE_TYPE (op0)))
{
/* Remove any copies of empty classes. We check that the RHS
has a simple form so that TARGET_EXPRs and non-empty
CONSTRUCTORs get reduced properly, and we leave the return
slot optimization alone because it isn't a copy (FIXME so it
shouldn't be represented as one).
Also drop volatile variables on the RHS to avoid infinite
recursion from gimplify_expr trying to load the value. */
if (!TREE_SIDE_EFFECTS (op1)
|| (DECL_P (op1) && TREE_THIS_VOLATILE (op1)))
*expr_p = op0;
else if (TREE_CODE (op1) == MEM_REF
&& TREE_THIS_VOLATILE (op1))
{
/* Similarly for volatile MEM_REFs on the RHS. */
if (!TREE_SIDE_EFFECTS (TREE_OPERAND (op1, 0)))
*expr_p = op0;
else
*expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p),
TREE_OPERAND (op1, 0), op0);
}
else
*expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p),
op0, op1);
}
}
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:
gcc_unreachable ();
case FOR_STMT:
case WHILE_STMT:
case DO_STMT:
case SWITCH_STMT:
case CONTINUE_STMT:
case BREAK_STMT:
gcc_unreachable ();
case OMP_FOR:
case OMP_SIMD:
case OMP_DISTRIBUTE:
ret = cp_gimplify_omp_for (expr_p, pre_p);
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;
case CILK_SPAWN_STMT:
gcc_assert
(fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p));
/* If errors are seen, then just process it as a CALL_EXPR. */
if (!seen_error ())
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
case CALL_EXPR:
if (fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p)
&& !seen_error ())
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
default:
ret = (enum gimplify_status) 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;
}
