[patch, fortran] PR68566 ICE on using unusable array in reshape

[Jerry DeLisle]

On 04/02/2016 05:42 AM, Dominique d'Humières wrote:
> 
>> Le 2 avr. 2016 à 11:44, Dominique d'Humières <dominiq@lps.ens.fr> a écrit :
>>
>> Hi Jerry,
>>
>>> ...
>>> I will add an additional test case for the original posted problem in the PR.
>>> Two existing tests get exercised, changing the error message.  Finding the
>>> problems earlier in the matchers I think is the right way to go. I am curious if
>>> the old checks ever get triggered (I will look into that a little later.
>>
>> (2) Before your patch the errors were
>>
>> Error: Expression at (1) must be of INTEGER type, found REAL
>>
>> How difficult is it to restore the "found … « ?

I like that idea and not too difficult to do. ;)

> 
> --- ../_clean/gcc/fortran/array.c	2016-01-04 19:51:09.000000000 +0100
> +++ gcc/fortran/array.c	2016-04-02 14:31:08.000000000 +0200
> @@ -421,10 +421,15 @@ match_array_element_spec (gfc_array_spec
>    if (!gfc_expr_check_typed (*upper, gfc_current_ns, false))
>      return AS_UNKNOWN;
>  
> -  if ((*upper)->expr_type == EXPR_FUNCTION && (*upper)->ts.type == BT_UNKNOWN
> -      && (*upper)->symtree && strcmp ((*upper)->symtree->name, "null") == 0)
> +  if (((*upper)->expr_type == EXPR_CONSTANT
> +	&& (*upper)->ts.type != BT_INTEGER) ||
> +      ((*upper)->expr_type == EXPR_FUNCTION
> +	&& (*upper)->ts.type == BT_UNKNOWN
> +	&& (*upper)->symtree
> +	&& strcmp ((*upper)->symtree->name, "null") == 0))
>      {
> -      gfc_error ("Expecting a scalar INTEGER expression at %C");
> +      gfc_error ("Expecting a scalar INTEGER expression at %C, found %s",
> +		 gfc_basic_typename ((*upper)->ts.type));
>        return AS_UNKNOWN;
>      }
>  
> @@ -448,10 +453,16 @@ match_array_element_spec (gfc_array_spec
>    if (!gfc_expr_check_typed (*upper, gfc_current_ns, false))
>      return AS_UNKNOWN;
>  
> -  if ((*upper)->expr_type == EXPR_FUNCTION && (*upper)->ts.type == BT_UNKNOWN
> -      && (*upper)->symtree && strcmp ((*upper)->symtree->name, "null") == 0)
> -    {
> -      gfc_error ("Expecting a scalar INTEGER expression at %C");
> +  if (((*upper)->expr_type == EXPR_CONSTANT
> +	&& (*upper)->ts.type != BT_INTEGER) ||
> +      ((*upper)->expr_type == EXPR_FUNCTION
> +	&& (*upper)->ts.type == BT_UNKNOWN
> +	&& (*upper)->symtree
> +	&& strcmp ((*upper)->symtree->name, "null") == 0))
> +    {
> +      /* gfc_error ("Expecting a scalar INTEGER expression at %C"); */
> +      gfc_error ("Expecting a scalar INTEGER expression at %C, found %s",
> +		 gfc_basic_typename ((*upper)->ts.type));
>        return AS_UNKNOWN;
>      }
>  
> Does the trick (not regtested yet).
> 
> Dominique

I will do this, also the other test that you showed failed, I thought I fixed
already, but will double check it.

Jerry