https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97208
--- Comment #1 from Romain Naour <romain.naour at gmail dot com> --- Hello, I had to disable -ftree-loop-distribute-patterns while building the kernel on microblaze (using -Os). The regression appear since the commit [1] that moved -ftree-loop-distribute-patterns from -O3 to -O2 (-Os) optimization level. I guess this behavior change should be documented in the gcc 10 changes page [2]? [1] https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=5879ab5fafedc8f6f9bfe95a4cf8501b0df90edd [2] https://gcc.gnu.org/gcc-10/changes.html Best regards, Romain