re PR fortran/48889 (f951: internal compiler error: in gfc_is_constant_expr, at fortran/expr.c:906)

2011-05-11  Tobias Burnus  <burnus@net-b.de>

        PR fortran/48889
        * expr.c (gfc_is_constant_expr): Use e->value.function.esym
        instead of e->symtree->n.sym, if available.

2011-05-11  Tobias Burnus  <burnus@net-b.de>

        PR fortran/48889
        * gfortran.dg/generic_24.f90: New.

From-SVN: r173674

4 files changed, 120 insertions, 5 deletions

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 162da2e..f2dfe3f 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-11  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/48889
+	* expr.c (gfc_is_constant_expr): Use e->value.function.esym
+	instead of e->symtree->n.sym, if available.
+
 2011-05-07  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* f95-lang.c (global_bindings_p): Return bool and simplify.
diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
index 3d519db..f881bb1 100644
--- a/gcc/fortran/expr.c
+++ b/gcc/fortran/expr.c
@@ -893,6 +893,9 @@ gfc_is_constant_expr (gfc_expr *e)
     case EXPR_FUNCTION:
     case EXPR_PPC:
     case EXPR_COMPCALL:
+      gcc_assert (e->symtree || e->value.function.esym
+		  || e->value.function.isym);
+
       /* Call to intrinsic with at least one argument.  */
       if (e->value.function.isym && e->value.function.actual)
 	{
@@ -901,13 +904,14 @@ gfc_is_constant_expr (gfc_expr *e)
 	      return 0;
 	}
 
-      /* Make sure we have a symbol.  */
-      gcc_assert (e->symtree);
-
-      sym = e->symtree->n.sym;
-    
       /* Specification functions are constant.  */
       /* F95, 7.1.6.2; F2003, 7.1.7  */
+      sym = NULL;
+      if (e->symtree)
+	sym = e->symtree->n.sym;
+      if (e->value.function.esym)
+	sym = e->value.function.esym;
+
       if (sym
 	  && sym->attr.function
 	  && sym->attr.pure
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a7e2261..79919a2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-11  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/48889
+	* gfortran.dg/generic_24.f90: New.
+
 2011-05-11  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/15256
diff --git a/gcc/testsuite/gfortran.dg/generic_24.f90 b/gcc/testsuite/gfortran.dg/generic_24.f90
new file mode 100644
index 0000000..2388722
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/generic_24.f90
@@ -0,0 +1,100 @@
+! { dg-do compile }
+!
+! PR fortran/48889
+!
+! Thanks for
+! reporting to Lawrence Mitchell
+! for the test case to David Ham
+!
+module sparse_tools
+  implicit none
+  private
+  
+  type csr_foo
+     integer, dimension(:), pointer :: colm=>null()
+  end type csr_foo
+  
+  type block_csr_matrix
+     type(csr_foo) :: sparsity
+  end type block_csr_matrix
+
+  interface attach_block
+     module procedure block_csr_attach_block
+  end interface
+
+  interface size
+     module procedure  sparsity_size 
+  end interface
+  
+  public :: size, attach_block
+contains
+  subroutine block_csr_attach_block(matrix, val)
+    type(block_csr_matrix), intent(inout) :: matrix
+    real, dimension(size(matrix%sparsity%colm)), intent(in), target :: val
+  end subroutine block_csr_attach_block
+
+  pure function sparsity_size(sparsity, dim)
+    integer :: sparsity_size
+    type(csr_foo), intent(in) :: sparsity
+    integer, optional, intent(in) :: dim
+  end function sparsity_size
+end module sparse_tools
+
+module global_numbering
+  use sparse_tools
+  implicit none
+  
+  type ele_numbering_type
+     integer :: boundaries
+  end type ele_numbering_type
+
+  type element_type
+     integer :: loc 
+     type(ele_numbering_type), pointer :: numbering=>null()
+  end type element_type
+
+  type csr_sparsity
+  end type csr_sparsity
+  
+  interface size
+     module procedure sparsity_size
+  end interface size
+contains
+  pure function sparsity_size(sparsity, dim)
+    integer :: sparsity_size
+    type(csr_sparsity), intent(in) :: sparsity
+    integer, optional, intent(in) :: dim
+  end function sparsity_size
+
+  subroutine make_boundary_numbering(EEList, xndglno, ele_n)
+    type(csr_sparsity), intent(in) :: EEList
+    type(element_type), intent(in) :: ele_n
+    integer, dimension(size(EEList,1)*ele_n%loc), intent(in), target ::&
+         & xndglno 
+    integer, dimension(ele_n%numbering%boundaries) :: neigh
+    integer :: j
+    j=size(neigh)
+  end subroutine make_boundary_numbering
+end module global_numbering
+
+module sparse_matrices_fields
+  use sparse_tools
+implicit none
+   type scalar_field
+      real, dimension(:), pointer :: val
+   end type scalar_field
+contains  
+  subroutine csr_mult_T_scalar(x)
+    type(scalar_field), intent(inout) :: x
+    real, dimension(:), allocatable :: tmp
+    integer :: i
+    i=size(x%val)
+  end subroutine csr_mult_T_scalar
+end module sparse_matrices_fields
+
+program test
+  use sparse_matrices_fields
+  use global_numbering
+end program test
+
+! { dg-final { cleanup-modules "sparse_tools sparse_matrices_fields global_numbering" } }