[Bug middle-end/106776] Unexpected use-after-free warning

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106776

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Before PRE
 
[/opt/compiler-explorer/gcc-12.2.0/include/c++/12.2.0/bits/stl_tree.h:1061:28]
__position ={v} {CLOBBER(eol)};
  [/app/example.cpp:25:62] _4 = [/app/example.cpp:25:10]
&[/app/example.cpp:25:62] [/app/example.cpp:25:62] MEM[(struct pair *)SR.163_98
+ 32B].second;
  [/app/example.cpp:14:23] _57 = MEM[(int *)_3];
  [/app/example.cpp:14:21] _58 = _57 + -1;
  [/app/example.cpp:14:30] MEM[(int *)_3] = _58;
  [/app/example.cpp:14:17] if (_58 == 0)
    goto <bb 9>; [33.00%]
  else
    goto <bb 10>; [67.00%]

  <bb 9> [local count: 335388518]:
  MEM[(int *)_3] ={v} {CLOBBER};
  [/app/example.cpp:14:45] operator delete (_3, 4);

  <bb 10> [local count: 1016328849]:
  [/opt/compiler-explorer/gcc-12.2.0/include/c++/12.2.0/bits/stl_pair.h:185:12]
D.26938 ={v} {CLOBBER};
  [/app/example.cpp:25:37] D.26938 ={v} {CLOBBER(eol)};
  [/app/example.cpp:14:23] _54 = MEM[(int *)_3];

So it is not PRE causing the issue ... Look further back.