https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95353
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 48612 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48612&action=edit a testcase $ gcc -O2 x.i -S /export/gnu/import/git/sources/binutils-gdb-release/gas/config/tc-csky.c: In function ‘md_convert_frag’: /export/gnu/import/git/sources/binutils-gdb-release/gas/config/tc-csky.c:4507:9: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 4507 | buf[1] = BYTE_1 (CSKYV1_INST_SUBI | (7 << 4)); | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /export/gnu/import/git/sources/binutils-gdb-release/gas/config/tc-csky.c:4508:9: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 4508 | buf[2] = BYTE_0 (CSKYV1_INST_STW | (15 << 8)); /* stw r15, r0. */ | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /export/gnu/import/git/sources/binutils-gdb-release/gas/config/tc-csky.c:4509:9: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 4509 | buf[3] = BYTE_1 (CSKYV1_INST_STW | (15 << 8)); | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ...
