Hi all, The vector rotate splitter has some logic to deal with post-reload splitting but not all cases in aarch64_emit_opt_vec_rotate are post-reload-safe. In particular the ROTATE+XOR expansion for TARGET_SHA3 can create RTL that can later be simplified to a simple ROTATE post-reload, which would then match the insn again and try to split it. So do a clean split pre-reload and avoid going down this path post-reload by restricting the insn_and_split to can_create_pseudo_p ().
Bootstrapped and tested on aarch64-none-linux.
Pushing to trunk.
Thanks,
Kyrill
Signed-off-by: Kyrylo Tkachov <ktkac...@nvidia.com>
gcc/
PR target/117449
* config/aarch64/aarch64-simd.md (*aarch64_simd_rotate_imm<mode>):
Match only when can_create_pseudo_p ().
* config/aarch64/aarch64.cc (aarch64_emit_opt_vec_rotate): Assume
can_create_pseudo_p ().
gcc/testsuite/
PR target/117449
* gcc.c-torture/compile/pr117449.c: New test.
0001-PR-target-117449-Restrict-vector-rotate-match-and-sp.patch
Description: 0001-PR-target-117449-Restrict-vector-rotate-match-and-sp.patch
