https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112374
--- Comment #24 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #22)
> This one starts to differ during RTL expansion, -fdump-tree-optimized
> differs only
> with addition of DEBUG stmts, but expand dump already has:
> -(insn 1007 1006 1008 (parallel [
> +(insn 1007 8 1008 (parallel [
> (set (reg:DI 106)
> (plus:DI (reg/f:DI 93 virtual-stack-vars)
> - (const_int -32 [0xffffffffffffffe0])))
> + (const_int -4 [0xfffffffffffffffc])))
> (clobber (reg:CC 17 flags))
> ]) "pr112374.C":11:14 -1
> (nil))
With debug:
```
Partition 0: size 4 align 1
dD.4933
```
Without:
```
Partition 0: size 4 align 32
dD.4933
```
So the alignment is different there.