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compile.c: adjust call_info count

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* compile.c (remove_unreachable_chunk): decrease count of
  call_info in removed instructions.  fix up r53402.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-01-01 06:28:58 +00:00
parent 0094737575
commit 910eb9836d
2 changed files with 29 additions and 17 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
Fri Jan 1 15:28:56 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* compile.c (remove_unreachable_chunk): decrease count of
call_info in removed instructions. fix up r53402.
Fri Jan 1 12:05:53 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* compile.c (remove_unreachable_chunk): remove unreferred label

41
compile.c
View file

@ -1933,9 +1933,9 @@ get_prev_insn(INSN *iobj)
}
static void
unref_destination(INSN *iobj)
unref_destination(INSN *iobj, int pos)
{
LABEL *lobj = (LABEL *)OPERAND_AT(iobj, 0);
LABEL *lobj = (LABEL *)OPERAND_AT(iobj, pos);
--lobj->refcnt;
if (!lobj->refcnt) REMOVE_ELEM(&lobj->link);
}
@ -1953,19 +1953,26 @@ replace_destination(INSN *dobj, INSN *nobj)
}
static int
remove_unreachable_chunk(LINK_ELEMENT *i)
remove_unreachable_chunk(rb_iseq_t *iseq, LINK_ELEMENT *i)
{
int removed = 0;
while (i) {
if (i->type == ISEQ_ELEMENT_INSN) {
switch (INSN_OF(i)) {
case BIN(jump):
case BIN(branchif):
case BIN(branchunless):
case BIN(branchnil):
unref_destination((INSN *)i);
default:
break;
struct rb_iseq_constant_body *body = iseq->body;
VALUE insn = INSN_OF(i);
int pos, len = insn_len(insn);
for (pos = 0; pos < len; ++pos) {
switch (insn_op_types(insn)[pos]) {
case TS_OFFSET:
unref_destination((INSN *)i, pos);
break;
case TS_CALLINFO:
if (((struct rb_call_info *)OPERAND_AT(i, pos))->flag & VM_CALL_KWARG)
--(body->ci_kw_size);
else
--(body->ci_size);
break;
}
}
}
else if (i->type == ISEQ_ELEMENT_LABEL) {
@ -2006,13 +2013,13 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
* =>
* LABEL:
*/
unref_destination(iobj);
unref_destination(iobj, 0);
REMOVE_ELEM(&iobj->link);
}
else if (iobj != diobj && diobj->insn_id == BIN(jump) &&
OPERAND_AT(iobj, 0) != OPERAND_AT(diobj, 0)) {
replace_destination(iobj, diobj);
remove_unreachable_chunk(iobj->link.next);
remove_unreachable_chunk(iseq, iobj->link.next);
goto again;
}
else if (diobj->insn_id == BIN(leave)) {
@ -2032,7 +2039,7 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
INSN *popiobj = new_insn_core(iseq, iobj->line_no,
BIN(pop), 0, 0);
/* replace */
unref_destination(iobj);
unref_destination(iobj, 0);
REPLACE_ELEM((LINK_ELEMENT *)iobj, (LINK_ELEMENT *)eiobj);
INSERT_ELEM_NEXT((LINK_ELEMENT *)eiobj, (LINK_ELEMENT *)popiobj);
iobj = eiobj;
@ -2062,13 +2069,13 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
REMOVE_ELEM(&iobj->link);
}
}
else if (remove_unreachable_chunk(iobj->link.next)) {
else if (remove_unreachable_chunk(iseq, iobj->link.next)) {
goto again;
}
}
if (iobj->insn_id == BIN(leave)) {
remove_unreachable_chunk(iobj->link.next);
remove_unreachable_chunk(iseq, iobj->link.next);
}
if (iobj->insn_id == BIN(branchif) ||
@ -2166,7 +2173,7 @@ iseq_peephole_optimize(rb_iseq_t *iseq, LINK_ELEMENT *list, const int do_tailcal
goto again;
}
else {
unref_destination(iobj);
unref_destination(iobj, 0);
REMOVE_ELEM(&iobj->link);
}
break;