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

[Jerry DeLisle]

This problem is when array indexes are given that have non-integer expressions
or otherwise bad arrays, not just related to reshape.

There are several test cases presented in the PR.  Most of these are fixed by
adding a check for any non-integer in match_array_element_spec.  The patch-let
in gfc_simplify_reshape avoids passing a NULL shape further into simplification.

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.

Regression tested on x86-64-linux.  OK for trunk?


2016-04-02  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/68566
	* array.c (match_array_element_spec): Add check for non-integer dimension given.
	* simplify.c (gfc_simplify_reshape): If source shape is NULL return.
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