void
propagate_tree_value_into_stmt (gimple_stmt_iterator *gsi, tree val)
{
gimple stmt = gsi_stmt (*gsi);
if (is_gimple_assign (stmt))
{
tree expr = NULL_TREE;
if (gimple_assign_single_p (stmt))
expr = gimple_assign_rhs1 (stmt);
propagate_tree_value (&expr, val);
gimple_assign_set_rhs_from_tree (gsi, expr);
stmt = gsi_stmt (*gsi);
}
else if (gimple_code (stmt) == GIMPLE_COND)
{
tree lhs = NULL_TREE;
tree rhs = fold_convert (TREE_TYPE (val), integer_zero_node);
propagate_tree_value (&lhs, val);
gimple_cond_set_code (stmt, NE_EXPR);
gimple_cond_set_lhs (stmt, lhs);
gimple_cond_set_rhs (stmt, rhs);
}
else if (is_gimple_call (stmt)
&& gimple_call_lhs (stmt) != NULL_TREE)
{
gimple new_stmt;
tree expr = NULL_TREE;
propagate_tree_value (&expr, val);
new_stmt = gimple_build_assign (gimple_call_lhs (stmt), expr);
copy_virtual_operands (new_stmt, stmt);
move_ssa_defining_stmt_for_defs (new_stmt, stmt);
gsi_replace (gsi, new_stmt, false);
}
else if (gimple_code (stmt) == GIMPLE_SWITCH)
propagate_tree_value (gimple_switch_index_ptr (stmt), val);
else
gcc_unreachable ();
}
void
propagate_tree_value_into_stmt (gimple_stmt_iterator *gsi, tree val)
{
gimple stmt = gsi_stmt (*gsi);
if (is_gimple_assign (stmt))
{
tree expr = NULL_TREE;
if (gimple_assign_single_p (stmt))
expr = gimple_assign_rhs1 (stmt);
propagate_tree_value (&expr, val);
gimple_assign_set_rhs_from_tree (gsi, expr);
}
else if (gimple_code (stmt) == GIMPLE_COND)
{
tree lhs = NULL_TREE;
tree rhs = build_zero_cst (TREE_TYPE (val));
propagate_tree_value (&lhs, val);
gimple_cond_set_code (stmt, NE_EXPR);
gimple_cond_set_lhs (stmt, lhs);
gimple_cond_set_rhs (stmt, rhs);
}
else if (is_gimple_call (stmt)
&& gimple_call_lhs (stmt) != NULL_TREE)
{
tree expr = NULL_TREE;
bool res;
propagate_tree_value (&expr, val);
res = update_call_from_tree (gsi, expr);
gcc_assert (res);
}
else if (gimple_code (stmt) == GIMPLE_SWITCH)
propagate_tree_value (gimple_switch_index_ptr (stmt), val);
else
gcc_unreachable ();
}
void
gimple_regimplify_operands (gimple stmt, gimple_stmt_iterator *gsi_p)
{
size_t i, num_ops;
tree lhs;
gimple_seq pre = NULL;
gimple post_stmt = NULL;
push_gimplify_context (gimple_in_ssa_p (cfun));
switch (gimple_code (stmt))
{
case GIMPLE_COND:
gimplify_expr (gimple_cond_lhs_ptr (stmt), &pre, NULL,
is_gimple_val, fb_rvalue);
gimplify_expr (gimple_cond_rhs_ptr (stmt), &pre, NULL,
is_gimple_val, fb_rvalue);
break;
case GIMPLE_SWITCH:
gimplify_expr (gimple_switch_index_ptr (stmt), &pre, NULL,
is_gimple_val, fb_rvalue);
break;
case GIMPLE_OMP_ATOMIC_LOAD:
gimplify_expr (gimple_omp_atomic_load_rhs_ptr (stmt), &pre, NULL,
is_gimple_val, fb_rvalue);
break;
case GIMPLE_ASM:
{
size_t i, noutputs = gimple_asm_noutputs (stmt);
const char *constraint, **oconstraints;
bool allows_mem, allows_reg, is_inout;
oconstraints
= (const char **) alloca ((noutputs) * sizeof (const char *));
for (i = 0; i < noutputs; i++)
{
tree op = gimple_asm_output_op (stmt, i);
constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op)));
oconstraints[i] = constraint;
parse_output_constraint (&constraint, i, 0, 0, &allows_mem,
&allows_reg, &is_inout);
gimplify_expr (&TREE_VALUE (op), &pre, NULL,
is_inout ? is_gimple_min_lval : is_gimple_lvalue,
fb_lvalue | fb_mayfail);
}
for (i = 0; i < gimple_asm_ninputs (stmt); i++)
{
tree op = gimple_asm_input_op (stmt, i);
constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op)));
parse_input_constraint (&constraint, 0, 0, noutputs, 0,
oconstraints, &allows_mem, &allows_reg);
if (TREE_ADDRESSABLE (TREE_TYPE (TREE_VALUE (op))) && allows_mem)
allows_reg = 0;
if (!allows_reg && allows_mem)
gimplify_expr (&TREE_VALUE (op), &pre, NULL,
is_gimple_lvalue, fb_lvalue | fb_mayfail);
else
gimplify_expr (&TREE_VALUE (op), &pre, NULL,
is_gimple_asm_val, fb_rvalue);
}
}
break;
default:
/* NOTE: We start gimplifying operands from last to first to
make sure that side-effects on the RHS of calls, assignments
and ASMs are executed before the LHS. The ordering is not
important for other statements. */
num_ops = gimple_num_ops (stmt);
for (i = num_ops; i > 0; i--)
{
tree op = gimple_op (stmt, i - 1);
if (op == NULL_TREE)
continue;
if (i == 1 && (is_gimple_call (stmt) || is_gimple_assign (stmt)))
gimplify_expr (&op, &pre, NULL, is_gimple_lvalue, fb_lvalue);
else if (i == 2
&& is_gimple_assign (stmt)
&& num_ops == 2
&& get_gimple_rhs_class (gimple_expr_code (stmt))
== GIMPLE_SINGLE_RHS)
gimplify_expr (&op, &pre, NULL,
rhs_predicate_for (gimple_assign_lhs (stmt)),
fb_rvalue);
else if (i == 2 && is_gimple_call (stmt))
{
if (TREE_CODE (op) == FUNCTION_DECL)
continue;
gimplify_expr (&op, &pre, NULL, is_gimple_call_addr, fb_rvalue);
}
else
gimplify_expr (&op, &pre, NULL, is_gimple_val, fb_rvalue);
gimple_set_op (stmt, i - 1, op);
}
lhs = gimple_get_lhs (stmt);
/* If the LHS changed it in a way that requires a simple RHS,
create temporary. */
if (lhs && !is_gimple_reg (lhs))
{
bool need_temp = false;
if (is_gimple_assign (stmt)
&& num_ops == 2
&& get_gimple_rhs_class (gimple_expr_code (stmt))
== GIMPLE_SINGLE_RHS)
gimplify_expr (gimple_assign_rhs1_ptr (stmt), &pre, NULL,
rhs_predicate_for (gimple_assign_lhs (stmt)),
fb_rvalue);
else if (is_gimple_reg (lhs))
{
if (is_gimple_reg_type (TREE_TYPE (lhs)))
{
if (is_gimple_call (stmt))
{
i = gimple_call_flags (stmt);
if ((i & ECF_LOOPING_CONST_OR_PURE)
|| !(i & (ECF_CONST | ECF_PURE)))
need_temp = true;
}
if (stmt_can_throw_internal (stmt))
need_temp = true;
}
}
else
{
if (is_gimple_reg_type (TREE_TYPE (lhs)))
need_temp = true;
else if (TYPE_MODE (TREE_TYPE (lhs)) != BLKmode)
{
if (is_gimple_call (stmt))
{
tree fndecl = gimple_call_fndecl (stmt);
if (!aggregate_value_p (TREE_TYPE (lhs), fndecl)
&& !(fndecl && DECL_RESULT (fndecl)
&& DECL_BY_REFERENCE (DECL_RESULT (fndecl))))
need_temp = true;
}
else
need_temp = true;
}
}
if (need_temp)
{
tree temp = create_tmp_reg (TREE_TYPE (lhs), NULL);
if (gimple_in_ssa_p (cfun))
temp = make_ssa_name (temp, NULL);
gimple_set_lhs (stmt, temp);
post_stmt = gimple_build_assign (lhs, temp);
}
}
break;
}
if (!gimple_seq_empty_p (pre))
gsi_insert_seq_before (gsi_p, pre, GSI_SAME_STMT);
if (post_stmt)
gsi_insert_after (gsi_p, post_stmt, GSI_NEW_STMT);
pop_gimplify_context (NULL);
}