https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117544
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Kito Cheng <k...@gcc.gnu.org>: https://gcc.gnu.org/g:164aededa828c5db6195a10f9d0f6a500f2cbef9 commit r14-11557-g164aededa828c5db6195a10f9d0f6a500f2cbef9 Author: Robin Dapp <rd...@ventanamicro.com> Date: Thu Nov 21 14:49:53 2024 +0100 RISC-V: Ensure vtype for full-register moves [PR117544]. As discussed in PR117544 the VTYPE register is not preserved across function calls. Even though vmv1r-like instructions operate independently of the actual vtype they still require a valid vtype. As we cannot guarantee that the vtype is valid we must make sure to emit a vsetvl between a function call and a vmv1r.v. This patch makes the necessary changes by splitting the full-reg-move insns into patterns that use the vtype register and adding vmov to the types of instructions requiring a vset. PR target/117544 gcc/ChangeLog: * config/riscv/vector.md (*mov<mode>_whole): Split. (*mov<mode>_fract): Ditto. (*mov<mode>): Ditto. (*mov<mode>_vls): Ditto. (*mov<mode>_reg_whole_vtype): New pattern with vtype use. (*mov<mode>_fract_vtype): Ditto. (*mov<mode>_vtype): Ditto. (*mov<mode>_vls_vtype): Ditto. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/base/abi-call-args-4.c: Expect vsetvl. * gcc.target/riscv/rvv/base/pr117544.c: New test.
