[Bug target/114027] [14] RISC-V vector: miscompile at -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114027

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Works fine on aarch64 with SVE:
```
[apinski@xeond2 upstream-full-cross]$ ./install/bin/aarch64-linux-gnu-gcc -O3
t6.c -static -march=armv9-a+sve2
[apinski@xeond2 upstream-full-cross]$ ./install-qemu/bin/qemu-aarch64 a.out
;echo $?
0
[apinski@xeond2 upstream-full-cross]$ ./install/bin/aarch64-linux-gnu-gcc -O3
t6.c -static -march=armv9-a+sve2 -fno-vect-cost-model
[apinski@xeond2 upstream-full-cross]$ ./install-qemu/bin/qemu-aarch64 a.out
;echo $?
0
```