[Patch, Fortran, committed] PR 18918 - Fix max-rank check for coarrays

[Tobias Burnus <tobias dot burnus at physik dot fu-berlin dot de>]

Committed as obvious (Rev. 172812).

Tobias

Index: gcc/testsuite/gfortran.dg/coarray_18.f90
===================================================================
--- gcc/testsuite/gfortran.dg/coarray_18.f90	(revision 0)
+++ gcc/testsuite/gfortran.dg/coarray_18.f90	(revision 0)
@@ -0,0 +1,39 @@
+! { dg-do compile }
+! { dg-options "-fcoarray=single" }
+!
+! Prevent ICE when exceeding the maximal number of allowed
+! dimensions (normal + codimensions).
+!
+! Fortran 2008 allows (co)arrays with 15 ranks
+! Currently, gfortran only supports 7, cf. PR 37577
+! Thus, the program is valid Fortran 2008 ...
+!
+! See also general coarray PR 18918
+!
+! Test case taken from Leibniz-Rechenzentrum (LRZ)'s
+! fortran_tests with thanks to Reinhold Bader.
+!
+
+program ar
+  implicit none
+  integer :: ic(2)[*]
+  integer :: id(2,2)[2,*]
+  integer :: ie(2,2,2)[2,2,*]
+  integer :: ig(2,2,2,2)[2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: ih(2,2,2,2,2)[2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: ij(2,2,2,2,2,2)[2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: ik(2,2,2,2,2,2,2)[2,2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: il[2,2,2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: im[2,2,2,2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: in[2,2,2,2,2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+  integer :: io[2,2,2,2,2,2,2,2,2,2,*] ! { dg-error "has more than 7 dimensions" }
+   real :: x2(2,2,4)[2,*]
+   complex :: c2(4,2)[2,*]
+   double precision :: d2(1,5,9)[2,*]
+   character(len=1) :: ch2(2)[2,*]
+   character(len=2) :: ch22(-5:4)[2,*]
+   logical :: l2(17)[2,*]
+   if (this_image() == 1) then
+      write(*,*) 'OK'
+   end if
+end program
Index: gcc/testsuite/ChangeLog
===================================================================
--- gcc/testsuite/ChangeLog	(revision 172811)
+++ gcc/testsuite/ChangeLog	(working copy)
@@ -1,3 +1,8 @@
+2011-04-21  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/18918
+	* gfortran.dg/coarray_18.f90: New.
+
 2011-04-20  Jason Merrill  <jason@redhat.com>
 
 	* g++.dg/cpp0x/initlist47.C: New.
Index: gcc/fortran/array.c
===================================================================
--- gcc/fortran/array.c	(revision 172811)
+++ gcc/fortran/array.c	(working copy)
@@ -576,6 +576,13 @@
       goto cleanup;
     }
 
+  if (as->rank >= GFC_MAX_DIMENSIONS)
+    {
+      gfc_error ("Array specification at %C has more than %d "
+		 "dimensions", GFC_MAX_DIMENSIONS);
+      goto cleanup;
+    }
+
   for (;;)
     {
       as->corank++;
@@ -644,7 +651,7 @@
 	  goto cleanup;
 	}
 
-      if (as->corank >= GFC_MAX_DIMENSIONS)
+      if (as->rank + as->corank >= GFC_MAX_DIMENSIONS)
 	{
 	  gfc_error ("Array specification at %C has more than %d "
 		     "dimensions", GFC_MAX_DIMENSIONS);
Index: gcc/fortran/ChangeLog
===================================================================
--- gcc/fortran/ChangeLog	(revision 172811)
+++ gcc/fortran/ChangeLog	(working copy)
@@ -1,3 +1,8 @@
+2011-04-21  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/18918
+	* array.c (gfc_match_array_spec): Fix maximal rank(+corank) check.
+
 2011-04-20  Jim Meyering  <meyering@redhat.com>
 
 	* expr.c (free_expr0): Remove useless if-before-free.