static tree
rhs_to_tree (tree type, gimple stmt)
{
enum tree_code code = gimple_assign_rhs_code (stmt);
if (get_gimple_rhs_class (code) == GIMPLE_BINARY_RHS)
return fold_build2 (code, type, gimple_assign_rhs1 (stmt),
gimple_assign_rhs2 (stmt));
else if (get_gimple_rhs_class (code) == GIMPLE_UNARY_RHS)
return build1 (code, type, gimple_assign_rhs1 (stmt));
else if (get_gimple_rhs_class (code) == GIMPLE_SINGLE_RHS)
return gimple_assign_rhs1 (stmt);
else
gcc_unreachable ();
}
/* Transform
1) Memory references.
*/
static void
mf_xform_statements (void)
{
basic_block bb, next;
gimple_stmt_iterator i;
int saved_last_basic_block = last_basic_block;
enum gimple_rhs_class grhs_class;
bb = ENTRY_BLOCK_PTR ->next_bb;
do
{
next = bb->next_bb;
for (i = gsi_start_bb (bb); !gsi_end_p (i); gsi_next (&i))
{
gimple s = gsi_stmt (i);
/* Only a few GIMPLE statements can reference memory. */
switch (gimple_code (s))
{
case GIMPLE_ASSIGN:
mf_xform_derefs_1 (&i, gimple_assign_lhs_ptr (s),
gimple_location (s), integer_one_node);
mf_xform_derefs_1 (&i, gimple_assign_rhs1_ptr (s),
gimple_location (s), integer_zero_node);
grhs_class = get_gimple_rhs_class (gimple_assign_rhs_code (s));
if (grhs_class == GIMPLE_BINARY_RHS)
mf_xform_derefs_1 (&i, gimple_assign_rhs2_ptr (s),
gimple_location (s), integer_zero_node);
break;
case GIMPLE_RETURN:
if (gimple_return_retval (s) != NULL_TREE)
{
mf_xform_derefs_1 (&i, gimple_return_retval_ptr (s),
gimple_location (s),
integer_zero_node);
}
break;
default:
;
}
}
bb = next;
}
while (bb && bb->index <= saved_last_basic_block);
}
void
extract_ops_from_tree (tree expr, enum tree_code *subcode_p, tree *op1_p,
tree *op2_p, tree *op3_p)
{
enum gimple_rhs_class grhs_class;
*subcode_p = TREE_CODE (expr);
grhs_class = get_gimple_rhs_class (*subcode_p);
if (grhs_class == GIMPLE_TERNARY_RHS)
{
*op1_p = TREE_OPERAND (expr, 0);
*op2_p = TREE_OPERAND (expr, 1);
*op3_p = TREE_OPERAND (expr, 2);
}
else if (grhs_class == GIMPLE_BINARY_RHS)
{
*op1_p = TREE_OPERAND (expr, 0);
*op2_p = TREE_OPERAND (expr, 1);
*op3_p = NULL_TREE;
}
else if (grhs_class == GIMPLE_UNARY_RHS)
{
*op1_p = TREE_OPERAND (expr, 0);
*op2_p = NULL_TREE;
*op3_p = NULL_TREE;
}
else if (grhs_class == GIMPLE_SINGLE_RHS)
{
*op1_p = expr;
*op2_p = NULL_TREE;
*op3_p = NULL_TREE;
}
else
gcc_unreachable ();
}
bool
is_gimple_reg_rhs (tree t)
{
return get_gimple_rhs_class (TREE_CODE (t)) != GIMPLE_INVALID_RHS;
}
static bool
process_assignment (gimple stmt, gimple_stmt_iterator call, tree *m,
tree *a, tree *ass_var)
{
tree op0, op1 = NULL_TREE, non_ass_var = NULL_TREE;
tree dest = gimple_assign_lhs (stmt);
enum tree_code code = gimple_assign_rhs_code (stmt);
enum gimple_rhs_class rhs_class = get_gimple_rhs_class (code);
tree src_var = gimple_assign_rhs1 (stmt);
/* See if this is a simple copy operation of an SSA name to the function
result. In that case we may have a simple tail call. Ignore type
conversions that can never produce extra code between the function
call and the function return. */
if ((rhs_class == GIMPLE_SINGLE_RHS || gimple_assign_cast_p (stmt))
&& (TREE_CODE (src_var) == SSA_NAME))
{
/* Reject a tailcall if the type conversion might need
additional code. */
if (gimple_assign_cast_p (stmt))
{
if (TYPE_MODE (TREE_TYPE (dest)) != TYPE_MODE (TREE_TYPE (src_var)))
return false;
/* Even if the type modes are the same, if the precision of the
type is smaller than mode's precision,
reduce_to_bit_field_precision would generate additional code. */
if (INTEGRAL_TYPE_P (TREE_TYPE (dest))
&& (GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (dest)))
> TYPE_PRECISION (TREE_TYPE (dest))))
return false;
}
if (src_var != *ass_var)
return false;
*ass_var = dest;
return true;
}
switch (rhs_class)
{
case GIMPLE_BINARY_RHS:
op1 = gimple_assign_rhs2 (stmt);
/* Fall through. */
case GIMPLE_UNARY_RHS:
op0 = gimple_assign_rhs1 (stmt);
break;
default:
return false;
}
/* Accumulator optimizations will reverse the order of operations.
We can only do that for floating-point types if we're assuming
that addition and multiplication are associative. */
if (!flag_associative_math)
if (FLOAT_TYPE_P (TREE_TYPE (DECL_RESULT (current_function_decl))))
return false;
if (rhs_class == GIMPLE_UNARY_RHS)
;
else if (op0 == *ass_var
&& (non_ass_var = independent_of_stmt_p (op1, stmt, call)))
;
else if (op1 == *ass_var
&& (non_ass_var = independent_of_stmt_p (op0, stmt, call)))
;
else
return false;
switch (code)
{
case PLUS_EXPR:
*a = non_ass_var;
*ass_var = dest;
return true;
case POINTER_PLUS_EXPR:
if (op0 != *ass_var)
return false;
*a = non_ass_var;
*ass_var = dest;
return true;
case MULT_EXPR:
*m = non_ass_var;
*ass_var = dest;
return true;
case NEGATE_EXPR:
*m = build_minus_one_cst (TREE_TYPE (op0));
*ass_var = dest;
return true;
case MINUS_EXPR:
if (*ass_var == op0)
*a = fold_build1 (NEGATE_EXPR, TREE_TYPE (non_ass_var), non_ass_var);
else
{
*m = build_minus_one_cst (TREE_TYPE (non_ass_var));
*a = fold_build1 (NEGATE_EXPR, TREE_TYPE (non_ass_var), non_ass_var);
}
*ass_var = dest;
return true;
/* TODO -- Handle POINTER_PLUS_EXPR. */
default:
return false;
}
}
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);
}
expr_hash_elt::expr_hash_elt (gimple *stmt, tree orig_lhs)
{
enum gimple_code code = gimple_code (stmt);
struct hashable_expr *expr = this->expr ();
if (code == GIMPLE_ASSIGN)
{
enum tree_code subcode = gimple_assign_rhs_code (stmt);
switch (get_gimple_rhs_class (subcode))
{
case GIMPLE_SINGLE_RHS:
expr->kind = EXPR_SINGLE;
expr->type = TREE_TYPE (gimple_assign_rhs1 (stmt));
expr->ops.single.rhs = gimple_assign_rhs1 (stmt);
break;
case GIMPLE_UNARY_RHS:
expr->kind = EXPR_UNARY;
expr->type = TREE_TYPE (gimple_assign_lhs (stmt));
if (CONVERT_EXPR_CODE_P (subcode))
subcode = NOP_EXPR;
expr->ops.unary.op = subcode;
expr->ops.unary.opnd = gimple_assign_rhs1 (stmt);
break;
case GIMPLE_BINARY_RHS:
expr->kind = EXPR_BINARY;
expr->type = TREE_TYPE (gimple_assign_lhs (stmt));
expr->ops.binary.op = subcode;
expr->ops.binary.opnd0 = gimple_assign_rhs1 (stmt);
expr->ops.binary.opnd1 = gimple_assign_rhs2 (stmt);
break;
case GIMPLE_TERNARY_RHS:
expr->kind = EXPR_TERNARY;
expr->type = TREE_TYPE (gimple_assign_lhs (stmt));
expr->ops.ternary.op = subcode;
expr->ops.ternary.opnd0 = gimple_assign_rhs1 (stmt);
expr->ops.ternary.opnd1 = gimple_assign_rhs2 (stmt);
expr->ops.ternary.opnd2 = gimple_assign_rhs3 (stmt);
break;
default:
gcc_unreachable ();
}
}
else if (code == GIMPLE_COND)
{
expr->type = boolean_type_node;
expr->kind = EXPR_BINARY;
expr->ops.binary.op = gimple_cond_code (stmt);
expr->ops.binary.opnd0 = gimple_cond_lhs (stmt);
expr->ops.binary.opnd1 = gimple_cond_rhs (stmt);
}
else if (gcall *call_stmt = dyn_cast <gcall *> (stmt))
{
size_t nargs = gimple_call_num_args (call_stmt);
size_t i;
gcc_assert (gimple_call_lhs (call_stmt));
expr->type = TREE_TYPE (gimple_call_lhs (call_stmt));
expr->kind = EXPR_CALL;
expr->ops.call.fn_from = call_stmt;
if (gimple_call_flags (call_stmt) & (ECF_CONST | ECF_PURE))
expr->ops.call.pure = true;
else
expr->ops.call.pure = false;
expr->ops.call.nargs = nargs;
expr->ops.call.args = XCNEWVEC (tree, nargs);
for (i = 0; i < nargs; i++)
expr->ops.call.args[i] = gimple_call_arg (call_stmt, i);
}
else if (gswitch *swtch_stmt = dyn_cast <gswitch *> (stmt))
{
expr->type = TREE_TYPE (gimple_switch_index (swtch_stmt));
expr->kind = EXPR_SINGLE;
expr->ops.single.rhs = gimple_switch_index (swtch_stmt);
}
else if (code == GIMPLE_GOTO)
{
expr->type = TREE_TYPE (gimple_goto_dest (stmt));
expr->kind = EXPR_SINGLE;
expr->ops.single.rhs = gimple_goto_dest (stmt);
}
else if (code == GIMPLE_PHI)
{
size_t nargs = gimple_phi_num_args (stmt);
size_t i;
expr->type = TREE_TYPE (gimple_phi_result (stmt));
expr->kind = EXPR_PHI;
expr->ops.phi.nargs = nargs;
expr->ops.phi.args = XCNEWVEC (tree, nargs);
for (i = 0; i < nargs; i++)
expr->ops.phi.args[i] = gimple_phi_arg_def (stmt, i);
}
else
gcc_unreachable ();
m_lhs = orig_lhs;
m_vop = gimple_vuse (stmt);
m_hash = avail_expr_hash (this);
m_stamp = this;
}
/* Transform
1) Memory references.
2) BUILTIN_ALLOCA calls.
*/
static void
mf_xform_statements (void)
{
basic_block bb, next;
gimple_stmt_iterator i;
int saved_last_basic_block = last_basic_block;
enum gimple_rhs_class grhs_class;
unsigned argc, j;
bb = ENTRY_BLOCK_PTR ->next_bb;
do
{
next = bb->next_bb;
for (i = gsi_start_bb (bb); !gsi_end_p (i); gsi_next (&i))
{
gimple s = gsi_stmt (i);
/* Only a few GIMPLE statements can reference memory. */
switch (gimple_code (s))
{
case GIMPLE_ASSIGN:
DEBUGLOG("\n\n******** Gimlpe Assign LHS ***********\n");
mf_xform_derefs_1 (&i, gimple_assign_lhs_ptr (s),
gimple_location (s), integer_one_node);
DEBUGLOG("******** Gimlpe Assign RHS ***********\n");
mf_xform_derefs_1 (&i, gimple_assign_rhs1_ptr (s),
gimple_location (s), integer_zero_node);
grhs_class = get_gimple_rhs_class (gimple_assign_rhs_code (s));
if (grhs_class == GIMPLE_BINARY_RHS)
mf_xform_derefs_1 (&i, gimple_assign_rhs2_ptr (s),
gimple_location (s), integer_zero_node);
break;
case GIMPLE_RETURN:
if (gimple_return_retval (s) != NULL_TREE)
{
mf_xform_derefs_1 (&i, gimple_return_retval_ptr (s),
gimple_location (s),
integer_zero_node);
}
break;
case GIMPLE_CALL:
{
tree fndecl = gimple_call_fndecl (s);
//if (fndecl && (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_ALLOCA))
// gimple_call_set_cannot_inline (s, true);
argc = gimple_call_num_args(s);
for (j = 0; j < argc; j++){
mf_xform_derefs_1 (&i, gimple_call_arg_ptr (s, j),
gimple_location (s), integer_zero_node);
}
}
break;
default:
;
}
}
bb = next;
}
while (bb && bb->index <= saved_last_basic_block);
}
