re PR fortran/68566 (ICE on using unusable array in reshape (double free or corruption))

2016-04-09  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

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

	PR fortran/68566
	* gfortran.dg/pr36192.f90: Update test.
	* gfortran.dg/pr36192_1.f90: Update test.
	* gfortran.dg/real_dimension_1.f: Update test.
	* gfortran.dg/parameter_array_init_7.f90: New test.

From-SVN: r234864

gcc/fortran/ChangeLog

+2016-04-09  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/68566
+	* array.c (match_array_element_spec): Add check for non-integer.
+	* simplify.c (gfc_simplify_reshape): If source shape is NULL return.
+
 2016-04-06  Patrick Palka  <ppalka@gcc.gnu.org>
 
 	PR c/70436

gcc/fortran/array.c

@@ -421,10 +421,15 @@ match_array_element_spec (gfc_array_spec *as)
   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, found %s",
+		 gfc_basic_typename ((*upper)->ts.type));
       return AS_UNKNOWN;
     }
 
@@ -448,10 +453,15 @@ match_array_element_spec (gfc_array_spec *as)
   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;
     }
 

gcc/fortran/simplify.c

@@ -5163,6 +5163,9 @@ gfc_simplify_reshape (gfc_expr *source, gfc_expr *shape_exp,
       || !is_constant_array_expr (order_exp))
     return NULL;
 
+  if (source->shape == NULL)
+    return NULL;
+
   /* Proceed with simplification, unpacking the array.  */
 
   mpz_init (index);

gcc/testsuite/ChangeLog

+2016-04-09  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/68566
+	* gfortran.dg/pr36192.f90: Update test.
+	* gfortran.dg/pr36192_1.f90: Update test.
+	* gfortran.dg/real_dimension_1.f: Update test.
+	* gfortran.dg/parameter_array_init_7.f90: New test.
+
 2016-04-09  John David Anglin  <danglin@gcc.gnu.org>
 
 	PR testsuite/64039

gcc/testsuite/gfortran.dg/parameter_array_init_7.f90

+! { dg-do compile }
+! PR68566  ICE on using unusable array in reshape
+program p
+   integer, parameter :: n = 2
+   integer, parameter :: a(:) = 0  !{ dg-error "automatic or of deferred shape" }
+   integer, parameter :: b(n, n) = reshape([a, 1+a], [n, n])
+end
+

gcc/testsuite/gfortran.dg/pr36192.f90

@@ -3,7 +3,6 @@
 !
 program three_body
   real, parameter :: n = 2, d = 2
-  real, dimension(n,d) :: x      ! { dg-error "of INTEGER type|of INTEGER type" }
-  x(1,:) = (/ 1.0, 0.0 /)
+  real, dimension(n,d) :: x  ! { dg-error "Expecting a scalar INTEGER" }
+  x(1,:) = (/ 1.0, 0.0 /)    ! { dg-error "Unclassifiable" }
 end program three_body
-! { dg-prune-output "have constant shape" }

gcc/testsuite/gfortran.dg/pr36192_1.f90

@@ -2,11 +2,11 @@
 ! PR fortran/36192
 program three_body
    real, parameter ::  n = 2, d = 2
-   real, dimension(n,d) :: x_hq ! { dg-error "of INTEGER type|of INTEGER type" }
+   real, dimension(n,d) :: x_hq ! { dg-error "Expecting a scalar INTEGER" }
    call step(x_hq)
    contains
    subroutine step(x)
       real, dimension(:,:), intent(in) :: x
    end subroutine step
 end program three_body
-! { dg-prune-output "must have constant shape" }
+! { dg-prune-output "Rank mismatch in argument" }

gcc/testsuite/gfortran.dg/real_dimension_1.f

 ! { dg-do compile }
-! PR 34305 - make sure there's an error message for specifying a
+! PR 34305 - Test for specifying a real as dimension
       program test
-      parameter (datasize = 1000) 
-      dimension idata (datasize)  ! { dg-error "must be of INTEGER type|must have constant shape" }
-      idata (1) = -1
+      real , parameter :: dsize = 1000
+      dimension idata (dsize) ! { dg-error "scalar INTEGER expression" }
+      idata (1) = -1    ! { dg-error "must have the pointer attribute" }
       end