https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109865
--- Comment #5 from GARY.WHITE at ColoState dot edu <Gary.White at ColoState dot edu> --- (In reply to Steve Kargl from comment #4) > On Mon, May 15, 2023 at 07:11:17PM +0000, Gary.White at ColoState dot edu > wrote: > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109865 > > (In reply to kargl from comment #2) > > > (In reply to gary.wh...@colostate.edu from comment #0) > > > > > > > Options being used to compile the code: > > > > COPTIONS = -cpp -std=f2018 -c -D ieee -D dbleprecision -m64 > > > > -fsignaling-nans -ffpe-summary='invalid','zero','overflow','underflow' > > > > -O3 > > > > -funroll-loops -ffast-math > > > > > > What happens if you remove -ffast-math and use -O0 or -O1? > > > > -O0 generates correct code with or without -ffastmath, -O1 does not generate > > correct code. > > I assume you've also tried with -fcheck=all. > Your report states you're using og12. If > it supports the sanitizer, can you add > -fsanitize=undefined to the options? -fcheck=all does not generate any warnings. -fsanitize=undefined returns pages when loading of: undefined reference to `__ubsan_handle_pointer_overflow' which makes no sense to me????
