Hi Everyone, I was reading the description for -tree at https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html. The description states: -free Attempt to remove redundant extension instructions. This is especially helpful for the x86-64 architecture, which implicitly zero-extends in 64-bit registers after writing to their lower 32-bit half. Enabled for Alpha, AArch64 and x86 at levels -O2, -O3, -Os. Debian is reporting issues to us under three Chroot environments: armel, arm64, and amd64 (arm64 is aarch64). The issues are around an area where Big Integers are used, and it only occurs at -O2 and above. The Big Integers have some hand-tuned assembly language routines. Interactions with -tree are at the top of my list because of the symptoms, but I am not sure about armel. Does -tree apply to armel? Thanks in advance.
