https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101278
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Component|c++ |tree-optimization
Status|NEW |ASSIGNED
Keywords| |wrong-code
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a single deleted call LHS for the whole compilation:
;; Function cmCatViews_ (_ZL11cmCatViews_St16initializer_listIPKcE,
funcdef_no=2127, decl_uid=467
17, cgraph_uid=266, symbol_order=284)
+ Deleted trivially dead stmt: p_35 = *__for_begin_3;
+
+ Deleted dead store in call LHS: sit = std::copy_n<const char*, long unsigned
int, __gnu_cxx::__normal_iterator<char*, std::vector<char> > > (p_28, 1, sit);
+
struct vector cmCatViews_ (struct initializer_list views)
{
char * SR.75;
@@ -1238,7 +1245,6 @@
goto <bb 4>; [INV]
<bb 3> :
- p_35 = *__for_begin_3;
total_size_36 = total_size_2 + 1;
__for_begin_37 = __for_begin_3 + 8;
@@ -1264,7 +1270,7 @@
<bb 7> :
p_28 = *__for_begin_4;
- sit = std::copy_n<const char*, long unsigned int,
__gnu_cxx::__normal_iterator<char*, std::vector<char> > > (p_28, 1, sit);
+ std::copy_n<const char*, long unsigned int,
__gnu_cxx::__normal_iterator<char*, std::vector<char> > > (p_28, 1, sit);
__for_begin_30 = __for_begin_4 + 8;
<bb 8> :
# __for_begin_4 = PHI <views$_M_array_6(6), __for_begin_30(7)>
if (__for_begin_4 != _19)
goto <bb 7>; [INV]
else
goto <bb 9>; [INV]
so it seems we fail to consider the lhs used by the call itself.
