On Fri, Jan 23, 2015 at 9:26 PM, H.J. Lu <hjl.to...@gmail.com> wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64754 > > is a LTO bug where stage 1 and stage 2 compilers generate > different LTO IR. Is there a way to dump LTO IR to see the > actual difference in LTO IR?
No. I've had multiple incarnations of local patches to dump stuff during LTO IR write and LTO IR read so I could match them but never committed anything because all this stuff is in the hot path. I wonder if we can make a GCC plugin do it though, via re-using existing lto/tree-streamer.c and some preprocessor defines that switches between plugin and GCC mode... OTOH I had the idea to make the IL self-descriptive to some extent (in a debug mode, of course). Richard. > Thanks. > > -- > H.J.
