check_qualified_type

[Martin Uecker]

Am Montag, dem 17.06.2024 um 08:01 +0200 schrieb Richard Biener via Gcc:
> On Sun, 16 Jun 2024, Martin Uecker wrote:
> 
> > 
> > 
> > I am trying to understand what check_qualified_type
> > does exactly. The direct comparison of TYPE_NAMES seems incorrect
> > for C and its use is c_update_type_canonical then causes
> > PR114930 and PR115502.  In the later function I think
> > it is not really needed and I guess one could simply remove
> > it, but I wonder if it works incorrectly in other cases 
> > too?
> 
> TYPE_NAMES is compared because IIRC typedefs are recorded as variants
> and 'const T' isn't the same as 'const int' with typedef int T.

so if it is intentional that it differentiates between 

struct foo

and

typedef struct foo bar

then I will change c_update_type_canonical to not use it,
because both types should have the same TYPE_CANONICAL

Martin