On 2/3/2026 6:32 AM, Robin Dapp wrote:
Hi,
This patch disables memsets with a size less than a vector for
xtheadvector. As xtheadvector does not support fractional
LMUL we need to ensure to not emit those vectors that might
use it.
Regtested on rv64gcv_zvl512b.
Regards
Robin
PR target/123910
gcc/ChangeLog:
* config/riscv/riscv-string.cc (riscv_expand_block_move):
Remove !xtheadvector guard.
(use_vector_stringop_p): Guard small LMULs.
(check_vectorise_memory_operation): Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/pr123910.c: New test.
OK
jeff
