possibly-spurious assembly-mode mismatch in memory

[regehr]

src is:

@a = external global ptr

define void @f() {
  %1 = load ptr, ptr @a, align 8
  store ptr %1, ptr @a, align 8
  ret void
}

tgt is:

define void @f() local_unnamed_addr {
arm_tv_entry:
  ret void
}

and then with --tgt-is-asm I get:

ERROR: Mismatch in memory

Example:

Source:
ptr %#1 = null

SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 >	size: 0	align: 8	alloc type: 0	alive: false	address: 0
Block 1 >	size: 8	align: 8	alloc type: 0	alive: true	address: 8
Contents:
poison

Block 2 >	size: 0	align: 2	alloc type: 0	alive: true	address: 4
Contents:
*: poison


Target:

Mismatch in pointer(non-local, block_id=1, offset=0)
Source value: null, byte offset=0
Target value: poison