[Bug target/97252] [10/11 Regression] arm: ICE compiling pure-code/pr94538-2.c with MVE since r10-7293-g3eff57aa

["acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97252

--- Comment #3 from Alex Coplan <acoplan at gcc dot gnu.org> ---
FWIW, for the related testcase (which we also ICE on):

typedef int __attribute((vector_size(16))) V;
V v;
void f() { v = (V){4095}; }

clang pushes the constant out to the constant pool:

$ clang -target arm ice.c -c -S -o - -O2 -march=armv8.1-m.main+mve -mpure-code
-mfloat-abi=hard
[...]
f:
        .fnstart
@ %bb.0:
        movw    r0, :lower16:.LCP0_0
        movw    r1, :lower16:v
        movt    r0, :upper16:.LCP0_0
        movt    r1, :upper16:v
        vldrw.u32       q0, [r0]
        vstrw.32        q0, [r1]
        bx      lr
.Lfunc_end0:
        .size   f, .Lfunc_end0-f
        .cantunwind
        .fnend
                                        @ -- End function
        .type   v,%object               @ @v
        .comm   v,16,8
        .type   .LCP0_0,%object         @ @.LCP0_0
        .section        .rodata,"a",%progbits
        .p2align        4
.LCP0_0:
        .long   4095                    @ 0xfff
        .long   0                       @ 0x0
        .long   0                       @ 0x0
        .long   0                       @ 0x0
        .size   .LCP0_0, 16

I think we should do the same.