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attempting to adjust goto and label ips upon code elimination

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This commit is contained in:
hyunghwan.chung 2019-08-02 10:17:59 +00:00
parent e08edffb0c
commit c30f7466a5
1 changed files with 66 additions and 1 deletions
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67
moo/lib/comp.c
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@ -2864,9 +2864,10 @@ static MOO_INLINE int update_loop_continues (moo_t* moo, moo_oow_t jt)
static MOO_INLINE void adjust_all_loop_jumps_for_elimination (moo_t* moo, moo_oow_t start, moo_oow_t end)
{
moo_cunit_class_t* cc = (moo_cunit_class_t*)moo->c->cunit;
moo_loop_t* loop;
loop = ((moo_cunit_class_t*)moo->c->cunit)->mth.loop;
loop = cc->mth.loop;
while (loop)
{
adjust_loop_jumps_for_elimination (moo, &loop->break_ip_pool, start, end);
@ -2875,6 +2876,66 @@ static MOO_INLINE void adjust_all_loop_jumps_for_elimination (moo_t* moo, moo_oo
}
}
static MOO_INLINE void adjust_gotos_for_elimination (moo_t* moo, moo_oow_t start, moo_oow_t end)
{
moo_cunit_class_t* cc = (moo_cunit_class_t*)moo->c->cunit;
moo_goto_t* _goto, *prev_goto, * next_goto;
_goto = cc->mth._goto;
prev_goto = MOO_NULL;
while (_goto)
{
if (_goto->ip >= start && _goto->ip <= end)
{
next_goto = _goto->next;
moo_freemem (moo, _goto);
if (prev_goto)
{
prev_goto->next = next_goto;
}
else
{
cc->mth._goto = next_goto;
}
_goto = next_goto;
}
else
{
if (_goto->ip > end)
{
_goto->ip -= end - start + 1;
}
prev_goto = _goto;
_goto = _goto->next;
}
}
}
static MOO_INLINE void adjust_labels_for_elimination (moo_t* moo, moo_oow_t start, moo_oow_t end)
{
moo_cunit_class_t* cc = (moo_cunit_class_t*)moo->c->cunit;
moo_label_t* _label;
_label = cc->mth._label;
while (_label)
{
if (_label->ip >= start && _label->ip <= end)
{
/* TODO: ERROR - cannot eliminate this part. caller must ensure this doesn't happen */
}
else if (_label->ip > end)
{
_label->ip -= end - start + 1;
}
_label = _label->next;
}
}
static MOO_INLINE moo_loop_t* unlink_loop (moo_t* moo)
{
moo_cunit_class_t* cc = (moo_cunit_class_t*)moo->c->cunit;
@ -2931,6 +2992,8 @@ static void eliminate_instructions (moo_t* moo, moo_oow_t start, moo_oow_t end)
/* eliminate all instructions starting from the start index.
* setting the length to the start length will achieve this */
adjust_all_loop_jumps_for_elimination (moo, start, last);
adjust_gotos_for_elimination (moo, start, last);
adjust_labels_for_elimination (moo, start, last);
cc->mth.code.len = start;
}
else
@ -2940,6 +3003,8 @@ static void eliminate_instructions (moo_t* moo, moo_oow_t start, moo_oow_t end)
/* eliminate a chunk in the middle of the instruction buffer.
* some copying is required */
adjust_all_loop_jumps_for_elimination (moo, start, end);
adjust_gotos_for_elimination (moo, start, end);
adjust_labels_for_elimination (moo, start, end);
tail_len = cc->mth.code.len - end - 1;
MOO_MEMMOVE (&cc->mth.code.ptr[start], &cc->mth.code.ptr[end + 1], tail_len * MOO_SIZEOF(cc->mth.code.ptr[0]));