[Bug c/70378] wrong warning with -Wconversion with explicit cast

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70378

Eric Gallager  changed:

   What|Removed |Added

 CC||dmalcolm at gcc dot gnu.org,
   ||dodji at gcc dot gnu.org

--- Comment #5 from Eric Gallager  ---
cc-ing diagnostics maintainers

[Bug c/70378] wrong warning with -Wconversion with explicit cast

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70378

Eric Gallager  changed:

   What|Removed |Added

 CC||egallager at gcc dot gnu.org
   See Also||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=70336

--- Comment #4 from Eric Gallager  ---
(In reply to Manuel López-Ibáñez from comment #3)
> (In reply to Manuel López-Ibáñez from comment #2)
> > Simpler testcase:
> > 
> > typedef unsigned int uint32_t;
> > void foo(char a, uint32_t b)
> > {
> >  b = (uint32_t)((b * 10) + (uint32_t)a); 
> > }
> > 
> > Something must be removing the explicit cast or messing up the expression.
> 
> Perhaps a duplicate of PR70336. It seems that the move to match.pd just
> added more early folding that removes explicit casts.

70336 was fixed, though, and I still get a warning for this testcase...

[Bug c/70378] wrong warning with -Wconversion with explicit cast

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70378

--- Comment #3 from Manuel López-Ibáñez  ---
(In reply to Manuel López-Ibáñez from comment #2)
> Simpler testcase:
> 
> typedef unsigned int uint32_t;
> void foo(char a, uint32_t b)
> {
>  b = (uint32_t)((b * 10) + (uint32_t)a); 
> }
> 
> Something must be removing the explicit cast or messing up the expression.

Perhaps a duplicate of PR70336. It seems that the move to match.pd just added
more early folding that removes explicit casts.

[Bug c/70378] wrong warning with -Wconversion with explicit cast

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70378

Manuel López-Ibáñez  changed:

   What|Removed |Added

 Target|x86_64-w64-mingw32  |
 Status|UNCONFIRMED |NEW
Version|unknown |6.0
   Keywords||diagnostic
   Last reconfirmed||2016-04-02
 CC||manu at gcc dot gnu.org
   Host|x86_64-w64-mingw32  |
 Ever confirmed|0   |1
Summary|[5.3] inconsistant warnings |wrong warning with
   |with -Wconversion for   |-Wconversion with explicit
   |different types |cast
  Known to fail||6.0
  Build|x86_64-w64-mingw32  |

--- Comment #2 from Manuel López-Ibáñez  ---
Simpler testcase:

typedef unsigned int uint32_t;
void foo(char a, uint32_t b)
{
 b = (uint32_t)((b * 10) + (uint32_t)a); 
}

Something must be removing the explicit cast or messing up the expression.