[Bug lto/60319] wrong code (that hangs) by LTO at -Os and above on x86_64-linux-gnu

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60319

--- Comment #5 from Zhendong Su <su at cs dot ucdavis.edu> ---
Did you separately compile the two files at -O0 and link at -Os, like below? 

> $ gcc-trunk -flto -O0 -c foo.c
> $ gcc-trunk -flto -O0 -c main.c
> $ gcc-trunk -flto -Os foo.o main.o