htab_delete (ehspec);
}
+/* Emit SEQ into basic block just before INSN (that is assumed to be
+ first instruction of some existing BB and return the newly
+ produced block. */
+static basic_block
+emit_to_new_bb_before (rtx seq, rtx insn)
+{
+ rtx last;
+ basic_block bb;
+
+ last = emit_insn_before (seq, insn);
+ if (GET_CODE (last) == BARRIER)
+ last = PREV_INSN (last);
+ bb = create_basic_block (seq, last, BLOCK_FOR_INSN (insn)->prev_bb);
+ update_bb_for_insn (bb);
+ bb->flags |= BB_SUPERBLOCK;
+ return bb;
+}
+
/* Generate the code to actually handle exceptions, which will follow the
landing pads. */
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, region->u.try.catch->label);
+ emit_to_new_bb_before (seq, region->u.try.catch->label);
+
break;
case ERT_ALLOWED_EXCEPTIONS:
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, region->label);
+ emit_to_new_bb_before (seq, region->label);
break;
case ERT_CLEANUP:
struct eh_region *region = cfun->eh->region_array[i];
struct eh_region *outer;
rtx seq;
+ rtx barrier;
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
start_sequence ();
if (outer)
- emit_jump (outer->post_landing_pad);
+ {
+ edge e;
+ basic_block src, dest;
+
+ emit_jump (outer->post_landing_pad);
+ src = BLOCK_FOR_INSN (region->resume);
+ dest = BLOCK_FOR_INSN (outer->post_landing_pad);
+ while (src->succ)
+ remove_edge (src->succ);
+ e = make_edge (src, dest, 0);
+ e->probability = REG_BR_PROB_BASE;
+ e->count = src->count;
+ }
else
emit_library_call (unwind_resume_libfunc, LCT_THROW,
VOIDmode, 1, cfun->eh->exc_ptr, ptr_mode);
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, region->resume);
+ barrier = emit_insn_before (seq, region->resume);
+ /* Avoid duplicate barrier. */
+ if (GET_CODE (barrier) != BARRIER)
+ abort ();
+ delete_insn (barrier);
delete_insn (region->resume);
}
}
{
struct eh_region *region = cfun->eh->region_array[i];
rtx seq;
+ basic_block bb;
bool clobbers_hard_regs = false;
+ edge e;
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, region->post_landing_pad);
+ bb = emit_to_new_bb_before (seq, region->post_landing_pad);
+ e = make_edge (bb, bb->next_bb, EDGE_FALLTHRU);
+ e->count = bb->count;
+ e->probability = REG_BR_PROB_BASE;
}
}
for (fn_begin = get_insns (); ; fn_begin = NEXT_INSN (fn_begin))
if (GET_CODE (fn_begin) == NOTE
- && NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ && (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG
+ || NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_BASIC_BLOCK))
break;
- emit_insn_after (seq, fn_begin);
+ if (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ insert_insn_on_edge (seq, ENTRY_BLOCK_PTR->succ);
+ else
+ {
+ rtx last = BB_END (ENTRY_BLOCK_PTR->succ->dest);
+ for (; ; fn_begin = NEXT_INSN (fn_begin))
+ if ((GET_CODE (fn_begin) == NOTE
+ && NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ || fn_begin == last)
+ break;
+ emit_insn_after (seq, fn_begin);
+ }
}
/* Call back from expand_function_end to know where we should put
sjlj_emit_function_exit (void)
{
rtx seq;
+ edge e;
start_sequence ();
post-dominates all can_throw_internal instructions. This is
the last possible moment. */
- emit_insn_after (seq, cfun->eh->sjlj_exit_after);
+ for (e = EXIT_BLOCK_PTR->pred; e; e = e->pred_next)
+ if (e->flags & EDGE_FALLTHRU)
+ break;
+ if (e)
+ {
+ rtx insn;
+
+ /* Figure out whether the place we are supposed to insert libcall
+ is inside the last basic block or after it. In the other case
+ we need to emit to edge. */
+ if (e->src->next_bb != EXIT_BLOCK_PTR)
+ abort ();
+ for (insn = NEXT_INSN (BB_END (e->src)); insn; insn = NEXT_INSN (insn))
+ if (insn == cfun->eh->sjlj_exit_after)
+ break;
+ if (insn)
+ insert_insn_on_edge (seq, e);
+ else
+ {
+ insn = cfun->eh->sjlj_exit_after;
+ if (GET_CODE (insn) == CODE_LABEL)
+ insn = NEXT_INSN (insn);
+ emit_insn_after (seq, insn);
+ }
+ }
}
static void
{
int i, first_reachable;
rtx mem, dispatch, seq, fc;
+ rtx before;
+ basic_block bb;
+ edge e;
fc = cfun->eh->sjlj_fc;
seq = get_insns ();
end_sequence ();
- emit_insn_before (seq, (cfun->eh->region_array[first_reachable]
- ->post_landing_pad));
+ before = cfun->eh->region_array[first_reachable]->post_landing_pad;
+
+ bb = emit_to_new_bb_before (seq, before);
+ e = make_edge (bb, bb->next_bb, EDGE_FALLTHRU);
+ e->count = bb->count;
+ e->probability = REG_BR_PROB_BASE;
}
static void
void
finish_eh_generation (void)
{
+ basic_block bb;
+
/* Nothing to do if no regions created. */
if (cfun->eh->region_tree == NULL)
return;
/* We've totally changed the CFG. Start over. */
find_exception_handler_labels ();
- rebuild_jump_labels (get_insns ());
- find_basic_blocks (get_insns (), max_reg_num (), 0);
+ break_superblocks ();
+ if (USING_SJLJ_EXCEPTIONS)
+ commit_edge_insertions ();
+ FOR_EACH_BB (bb)
+ {
+ edge e, next;
+ bool eh = false;
+ for (e = bb->succ; e; e = next)
+ {
+ next = e->succ_next;
+ if (e->flags & EDGE_EH)
+ {
+ remove_edge (e);
+ eh = true;
+ }
+ }
+ if (eh)
+ make_eh_edge (NULL, bb, BB_END (bb));
+ }
cleanup_cfg (CLEANUP_PRE_LOOP | CLEANUP_NO_INSN_DEL);
}
\f
projects / platform / upstream / gcc.git / blobdiff