https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78186 --- Comment #1 from amker at gcc dot gnu.org --- Lto is unnecessary to reproduce it: ./gcc bf64-1.c -fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -w -lm -o ./bf64-1.exe -march=armv7-a Thanks, bin