[Bug bootstrap/62077] --with-build-config=bootstrap-lto fails

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62077

--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that the differences can be reproduced even with non-LTO cc1/cc1plus. 
Thus,
do a regular bootstrap --without-build-config then re-build stage2
build/genconfig.o with -flto (using
the stage1 compiler) and stage3 build/genconfig.o with -flto (using the stage2
compiler) and observe the exact same differences.

Without IPA-CP the difference in genconfig.o just jumps to a later place.
I'm quite sure the difference in the string literal type also occurs
without -flto but I don't see an easy way to verify that(?)

Maybe this is all spurious with host compiler capabilities leaking into
the IL in some way (not affecting code generation by luck).

 - I'm testing if trunk is really not affected (with
--enable-checking=release).

 - We need to track down that min_size issue sawn (but it looks unrelated)