[Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095

[rdapp at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458

--- Comment #10 from Robin Dapp <rdapp at gcc dot gnu.org> ---
It's also odd to see single-register spills for an LMUL8 register group, that
doesn't seem right.

(insn 174 169 180 2 (set (reg:RVVM1SF 247)
        (reg:RVVM1SF 112 v16)) "pr115458.c":48:33 2749 {*movrvvm1sf_whole}
     (expr_list:REG_DEAD (reg:RVVM1SF 112 v16)
        (nil)))
(insn 180 174 186 2 (set (reg:RVVM1SF 250)
        (reg:RVVM1SF 113 v17)) "pr115458.c":48:33 2749 {*movrvvm1sf_whole}
     (expr_list:REG_DEAD (reg:RVVM1SF 113 v17)
        (nil)))
...