https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66334
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Vladimir Makarov from comment #7) > I've looked at this. Insn 34 is transformed into > > ebx=ebx > > as pseudo 87 gets ebx. At the very end. LRA removes the useless insn. > Therefore there is no insn setting ebx. > > H.J., is it really a problem? The problem is although ebx, which is used for PIC, is callee saved, but ebx has junk when called from BUILT_IN_UNWIND_RESUME. LRA should reinitialize it.
