https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113359
--- Comment #14 from Martin Jambor <jamborm at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #13) > Might be also an interaction with IPA ICF in case there's a pointer to > the pair involved? Yes, this is exactly what seems to be happening. The problem goes away with -fno-icf. (Possibly because the testcase uses -fno-strict-aliasing,) IPA-ICF merges two functions which copy a structure and that access type it what IPA-SRA saves, but loads only the one of the merged functions. SRA then uses the (wrong) type to split aggregate copies into copies by individual fields. I have talked to Honza about this. It seems that IPA-ICF needs to be careful about aggreage with holes in different places. The ideal next step would be to create a testcase not dependent on IPA-SRA.
