void
tree_code_output_expression_statement (tree code,
unsigned char* filename, int lineno)
{
/* Output the line number information. */
emit_line_note ((const char *)filename, lineno);
TREE_USED (code) = 1;
TREE_SIDE_EFFECTS (code) = 1;
expand_expr_stmt (code);
}
void
tree_code_generate_return (tree type, tree exp)
{
tree setret;
tree param;
for (param = DECL_ARGUMENTS (current_function_decl);
param;
param = TREE_CHAIN (param))
{
if (DECL_CONTEXT (param) != current_function_decl)
abort ();
}
if (exp)
{
setret = build (MODIFY_EXPR, type, DECL_RESULT (current_function_decl),
build1 (CONVERT_EXPR, type, exp));
TREE_SIDE_EFFECTS (setret) = 1;
TREE_USED (setret) = 1;
expand_expr_stmt (setret);
}
expand_return (DECL_RESULT (current_function_decl));
}
static basic_block
expand_gimple_tailcall (basic_block bb, tree stmt, bool *can_fallthru)
{
rtx last2, last;
edge e;
edge_iterator ei;
int probability;
gcov_type count;
last2 = last = get_last_insn ();
expand_expr_stmt (stmt);
for (last = NEXT_INSN (last); last; last = NEXT_INSN (last))
if (CALL_P (last) && SIBLING_CALL_P (last))
goto found;
maybe_dump_rtl_for_tree_stmt (stmt, last2);
*can_fallthru = true;
return NULL;
found:
/* ??? Wouldn't it be better to just reset any pending stack adjust?
Any instructions emitted here are about to be deleted. */
do_pending_stack_adjust ();
/* Remove any non-eh, non-abnormal edges that don't go to exit. */
/* ??? I.e. the fallthrough edge. HOWEVER! If there were to be
EH or abnormal edges, we shouldn't have created a tail call in
the first place. So it seems to me we should just be removing
all edges here, or redirecting the existing fallthru edge to
the exit block. */
probability = 0;
count = 0;
for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
{
if (!(e->flags & (EDGE_ABNORMAL | EDGE_EH)))
{
if (e->dest != EXIT_BLOCK_PTR)
{
e->dest->count -= e->count;
e->dest->frequency -= EDGE_FREQUENCY (e);
if (e->dest->count < 0)
e->dest->count = 0;
if (e->dest->frequency < 0)
e->dest->frequency = 0;
}
count += e->count;
probability += e->probability;
remove_edge (e);
}
else
ei_next (&ei);
}
/* This is somewhat ugly: the call_expr expander often emits instructions
after the sibcall (to perform the function return). These confuse the
find_sub_basic_blocks code, so we need to get rid of these. */
last = NEXT_INSN (last);
gcc_assert (BARRIER_P (last));
*can_fallthru = false;
while (NEXT_INSN (last))
{
/* For instance an sqrt builtin expander expands if with
sibcall in the then and label for `else`. */
if (LABEL_P (NEXT_INSN (last)))
{
*can_fallthru = true;
break;
}
delete_insn (NEXT_INSN (last));
}
e = make_edge (bb, EXIT_BLOCK_PTR, EDGE_ABNORMAL | EDGE_SIBCALL);
e->probability += probability;
e->count += count;
BB_END (bb) = last;
update_bb_for_insn (bb);
if (NEXT_INSN (last))
{
bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb);
last = BB_END (bb);
if (BARRIER_P (last))
BB_END (bb) = PREV_INSN (last);
}
maybe_dump_rtl_for_tree_stmt (stmt, last2);
return bb;
}
static basic_block
expand_gimple_basic_block (basic_block bb, FILE * dump_file)
{
block_stmt_iterator bsi = bsi_start (bb);
tree stmt = NULL;
rtx note, last;
edge e;
edge_iterator ei;
if (dump_file)
{
fprintf (dump_file,
"\n;; Generating RTL for tree basic block %d\n",
bb->index);
}
if (!bsi_end_p (bsi))
stmt = bsi_stmt (bsi);
if (stmt && TREE_CODE (stmt) == LABEL_EXPR)
{
last = get_last_insn ();
expand_expr_stmt (stmt);
/* Java emits line number notes in the top of labels.
??? Make this go away once line number notes are obsoleted. */
BB_HEAD (bb) = NEXT_INSN (last);
if (NOTE_P (BB_HEAD (bb)))
BB_HEAD (bb) = NEXT_INSN (BB_HEAD (bb));
bsi_next (&bsi);
note = emit_note_after (NOTE_INSN_BASIC_BLOCK, BB_HEAD (bb));
maybe_dump_rtl_for_tree_stmt (stmt, last);
}
else
note = BB_HEAD (bb) = emit_note (NOTE_INSN_BASIC_BLOCK);
NOTE_BASIC_BLOCK (note) = bb;
for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
{
/* Clear EDGE_EXECUTABLE. This flag is never used in the backend. */
e->flags &= ~EDGE_EXECUTABLE;
/* At the moment not all abnormal edges match the RTL representation.
It is safe to remove them here as find_sub_basic_blocks will
rediscover them. In the future we should get this fixed properly. */
if (e->flags & EDGE_ABNORMAL)
remove_edge (e);
else
ei_next (&ei);
}
for (; !bsi_end_p (bsi); bsi_next (&bsi))
{
tree stmt = bsi_stmt (bsi);
basic_block new_bb;
if (!stmt)
continue;
/* Expand this statement, then evaluate the resulting RTL and
fixup the CFG accordingly. */
if (TREE_CODE (stmt) == COND_EXPR)
{
new_bb = expand_gimple_cond_expr (bb, stmt);
if (new_bb)
return new_bb;
}
else
{
tree call = get_call_expr_in (stmt);
if (call && CALL_EXPR_TAILCALL (call))
{
bool can_fallthru;
new_bb = expand_gimple_tailcall (bb, stmt, &can_fallthru);
if (new_bb)
{
if (can_fallthru)
bb = new_bb;
else
return new_bb;
}
}
else
{
last = get_last_insn ();
expand_expr_stmt (stmt);
maybe_dump_rtl_for_tree_stmt (stmt, last);
}
}
}
do_pending_stack_adjust ();
/* Find the block tail. The last insn in the block is the insn
before a barrier and/or table jump insn. */
last = get_last_insn ();
if (BARRIER_P (last))
last = PREV_INSN (last);
if (JUMP_TABLE_DATA_P (last))
last = PREV_INSN (PREV_INSN (last));
BB_END (bb) = last;
update_bb_for_insn (bb);
return bb;
}
void
expand_stmt_with_iterators_1 (void)
{
extern void expand_expr_stmt (void);
expand_expr_stmt ();
}