[Bug middle-end/88560] [9 Regression] armv8_2-fp16-move-1.c and related regressions after r260385

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88560

Wilco <wilco at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-12-20
                 CC|                            |wilco at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Wilco <wilco at gcc dot gnu.org> ---
Eg. before

test_load_store_1:
        ldrh    r3, [r2, r1, lsl #1]    @ __fp16
        strh    r3, [r0, r1, lsl #1]    @ __fp16
        bx      lr

after:

test_load_store_1:
        vmov.f16        s0, r3  @ __fp16
        ldrh    r3, [r2, r1, lsl #1]    @ __fp16
        strh    r3, [r0, r1, lsl #1]    @ __fp16
        bx      lr

Inserting spurious extra moves certainly doesn't look correct.