[Bug ipa/61602] [5 Regression] ICE in lto1 on x86_64-linux-gnu in ipa_single_use, at ipa.c:1257

[tbsaunde at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61602

tbsaunde at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |tbsaunde at gcc dot gnu.org

--- Comment #4 from tbsaunde at gcc dot gnu.org ---
So, during the single use pass we have 3 variables in symtab a, b and d. 
a->ref_list.referring is empty so the map doesn't contain an entry for a.  So 
single_use_map is only { b-> main, d -> main } and we assert because
single_use_map.get(a) returns NULL.

However I'm not sure if the problem is the assert being incorrect or if
a.ref_list.referring should contain main.