[Bug ipa/96482] [10/11 Regression] Combination of -finline-small-functions and ipa-cp optimisations causes incorrect values being passed to a function since r279523

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96482

--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #9)
> Also this one shows the problem: -fdbg-cnt=ipa_cp_bits:10460-10461.
> 
> If I see correctly the function body:
> lto-dump -dump-body=addr_to_index nir_lower_io.c.o
> Gimple Body of Function: addr_to_index
> addr_to_index (struct nir_builder * b, struct nir_ssa_def * addr,
> nir_address_format addr_format)
> {
>   unsigned int c;
> 
>   <bb 2> [local count: 1073741824]:
>   if (addr_format_3(D) == 3)
>     goto <bb 3>; [20.24%]
>   else
>     goto <bb 4>; [79.76%]
> 
>   <bb 3> [local count: 217325344]:
>   c = 0;
>   _9 = nir_swizzle (b_5(D), addr_6(D), &c, 1);
>   c ={v} {CLOBBER};
>   goto <bb 7>; [100.00%]
> 
>   <bb 4> [local count: 856416481]:
>   if (addr_format_3(D) == 4)
>     goto <bb 5>; [100.00%]
>   else
>     goto <bb 6>; [0.00%]
> 
>   <bb 5> [local count: 856416481]:
>   _8 = nir_channels (b_5(D), addr_6(D), 3);
>   goto <bb 7>; [100.00%]
> 
>   <bb 6> [count: 0]:
>   __builtin_unreachable ();
> 
>   <bb 7> [local count: 1073741824]:
>   # _1 = PHI <_9(3), _8(5)>
>   return _1;
> 
> }
> 
> addr_format (aka param 2) is either 3 or 4.
> 3 = 0x011
> 4 = 0x100
> 
> so mask 6 = 0x110 is wrong as first bit is not constant.
> @Martin: Am I right?

^^^
@Martin ?