> On Linux/x86_64,
> 
> cc33f880e553d1aa94d19a349ad755f34c33de9e is the first bad commit
> commit cc33f880e553d1aa94d19a349ad755f34c33de9e
> Author: Jan Hubicka <hubi...@ucw.cz>
> Date:   Sat Nov 16 23:45:57 2024 +0100
> 
>     Avoid expicit builtion list in tree-ssa-dce
> 
> caused
> 
> FAIL: g++.dg/tree-ssa/pr109442.C  -std=gnu++11  scan-tree-dump-not optimized 
> "_M_start"
> FAIL: g++.dg/tree-ssa/pr109442.C  -std=gnu++17  scan-tree-dump-not optimized 
> "_M_start"
> FAIL: g++.dg/tree-ssa/pr109442.C  -std=gnu++26  scan-tree-dump-not optimized 
> "_M_start"

Here I accidentally bundled testcase to wrong patch and it is fixed now
with the libstdc++ with rev aac5c57ee167230cea466064951daf06e42197b9

Honza

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