https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100152
--- Comment #32 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Iain Sandoe from comment #31) > (In reply to Richard Biener from comment #30) > > (In reply to Iain Sandoe from comment #29) > > > what is also somewhat peculiar is that replacing the first function in the > > > reduced test case with "extern void ___UTF_8_put(char *a, int b);" changes > > > the code-gen for the second function. > > > > That might hint at IPA RA which you can try disabling via -fno-ipa-ra which > > in turn hints at a target issue. > > yeah, it does switch back to using rbx, at least on the reduced test case. (also on the original). I wonder if the problem is that IPA can't "see" the lazy symbol resolver, so it just sees a call to ___UTF_8_put and doesn't know that this will be resolved indirectly. .. but something similar must apply to PLT and targets with linker veneers ?
