https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110308
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There are a difference in .optimized with respect to debug statements:
GCC 13:
# DEBUG i => 0
vs
GCC trunk:
# DEBUG i => NULL
This is in BB 5.
The change in Debug statements happened starting in ch2.
Before ch2:
<bb 5> [local count: 715863673]:
# DEBUG BEGIN_STMT
_3 = state[i_8];
_4 = _3->sample1;
_5 = _4 + 1;
_3->sample1 = _5;
# DEBUG BEGIN_STMT
i_23 = i_8 + 1;
# DEBUG i => i_23
<bb 6> [local count: 1073741824]:
# i_8 = PHI <0(4), i_23(5)>
# DEBUG i => i_8
# DEBUG BEGIN_STMT
if (channelCount.1_1 > i_8)
goto <bb 5>; [66.67%]
else
goto <bb 7>; [33.33%]
After:
<bb 5> [local count: 715863673]:
# i_9 = PHI <i_23(5), 0(4)>
# DEBUG BEGIN_STMT
_3 = state[i_9];
_4 = _3->sample1;
_5 = _4 + 1;
_3->sample1 = _5;
# DEBUG BEGIN_STMT
i_23 = i_9 + 1;
# DEBUG i => i_23
# DEBUG i => i_23
# DEBUG BEGIN_STMT
if (channelCount.1_1 > i_23)
goto <bb 5>; [66.67%]
else
goto <bb 6>; [33.33%]
While in GCC 13 after ch2 looks like:
<bb 5> [local count: 715863673]:
# i_9 = PHI <i_23(5), 0(4)>
# DEBUG i => i_9
# DEBUG BEGIN_STMT
_3 = state[i_9];
_4 = _3->sample1;
_5 = _4 + 1;
_3->sample1 = _5;
# DEBUG BEGIN_STMT
i_23 = i_9 + 1;
# DEBUG i => i_23
# DEBUG i => i_23
# DEBUG BEGIN_STMT
if (channelCount.1_1 > i_23)
goto <bb 5>; [66.67%]
else
goto <bb 6>; [33.33%]
Notice the `i => i_9` debug statement which is now missing.
