re PR fortran/71935 (ICE is_c_interoperable(): gfc_simplify_expr failed)

2016-07-22  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/71935
	* check.c (is_c_interoperable): Simplify right expression. 

2016-07-22  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/71935
	* gfortran.dg/c_sizeof_1.f90: Move invalid code to ...
	* gfortran.dg/c_sizeof_6.f90: here.  Test for error.
	* gfortran.dg/pr71935.f90: New test.

From-SVN: r238665

gcc/fortran/ChangeLog

+2016-07-22  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/71935
+	* check.c (is_c_interoperable): Simplify right expression. 
+
 2016-07-22  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/71795

gcc/fortran/check.c

@@ -4278,7 +4278,7 @@ is_c_interoperable (gfc_expr *expr, const char **msg, bool c_loc, bool c_f_ptr)
       }
 
     if (expr->ts.u.cl && expr->ts.u.cl->length
-	&& !gfc_simplify_expr (expr, 0))
+	&& !gfc_simplify_expr (expr->ts.u.cl->length, 0))
       gfc_internal_error ("is_c_interoperable(): gfc_simplify_expr failed");
 
     if (!c_loc && expr->ts.u.cl

gcc/testsuite/ChangeLog

+2016-07-22  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/71935
+	* gfortran.dg/c_sizeof_1.f90: Move invalid code to ...
+	* gfortran.dg/c_sizeof_6.f90: here.  Test for error.
+	* gfortran.dg/pr71935.f90: New test.
+
 2016-07-22 Martin Sebor  <msebor@redhat.com>
 
 	PR c++/71675

gcc/testsuite/gfortran.dg/c_sizeof_1.f90

@@ -22,9 +22,6 @@ if (i /= 4) call abort()
 i = c_sizeof(str2(1))
 if (i /= 1) call abort()
 
-i = c_sizeof(str2(1:3))
-if (i /= 3) call abort()
-
 write(*,*) c_sizeof(cptr), c_sizeof(iptr), c_sizeof(C_NULL_PTR)
 
 ! Using GNU's SIZEOF

gcc/testsuite/gfortran.dg/c_sizeof_6.f90

+! { dg-do compile }
+!
+program foo
+
+   use iso_c_binding, only: c_int, c_char, c_sizeof
+
+   integer(kind=c_int) :: i
+
+   character(kind=c_char,len=1),parameter :: str2(4) = ["a","b","c","d"]
+
+   i = c_sizeof(str2(1:3)) ! { dg-error "must be an interoperable data" }
+
+   if (i /= 3) call abort()
+
+end program foo
+

gcc/testsuite/gfortran.dg/pr71935.f90

+! { dg-do compile }
+program p
+   use iso_c_binding
+   character(len=1, kind=c_char), parameter :: z(2) = 'z'
+   print *, sizeof(z(3))      ! { dg-warning "is out of bounds" }
+   print *, c_sizeof(z(3))    ! { dg-warning "is out of bounds" }
+end