On Sat, Dec 14, 2019 at 11:25 PM Segher Boessenkool <seg...@kernel.crashing.org> wrote: > > On Sat, Dec 14, 2019 at 10:51:50AM -0800, Ian Lance Taylor via gcc wrote: > > I'm seeing compiler crashes building libgcc for powerpc64le-linux-gnu, > > cross-compiling from x86_64-pc-linux-gnu. I'm at SVN revision 279830. > > I'm seeing the following. Is anybody else seeing this crash? Thanks. > > No, and that makes me wonder what is going on. The error is simple enough > of course, as you note in a later message; but why do we not see it on > every other build?
I think it's because clang treats a left shift by a negative number as undefined behavior but GCC does not. So GCC is consistently producing some number, and clang is producing different numbers. I should note that I don't really understand what purpose that constant is serving anyhow. Ian
