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From: "avieira at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/97528] [9/10 Regression] ICE in
 decompose_automod_address, at rtlanal.c:6298 (arm-linux-gnueabihf)
Date: Mon, 01 Feb 2021 13:28:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97528

avieira at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |avieira at gcc dot gnu.org

--- Comment #7 from avieira at gcc dot gnu.org ---
Hi,

I am seeing this same fault cause a wrong-code gen on gcc-9 with the code
below:


void foo(uint16_t *dest, uint16x8_t a, unsigned long long stride)
{
   int i =3D 3;
   stride >>=3D 1;
   do {
     vst1_u16(dest, vget_low_u16(a));
     dest +=3D stride;
     i =3D i - 1;
   } while (i !=3D 0);
}

leading to:
foo:
        vst1.16 {d0}, [r0], r0
        vst1.16 {d0}, [r0], r0
        vst1.16 {d0}, [r0]
        bx      lr

which is obviously wrong. Can we backport this to gcc-9?=