re PR libfortran/27895 (problem with RESHAPE and zero-sized arrays)

	PR libfortran/27895

	* intrinsics/reshape_generic.c (reshape_internal): Fix so that it
	works correctly for zero-sized arrays.
	* m4/reshape.m4: Likewise.
	* generated/reshape_r16.c: Regenerate.
	* generated/reshape_c4.c: Regenerate.
	* generated/reshape_i4.c: Regenerate.
	* generated/reshape_c16.c: Regenerate.
	* generated/reshape_r10.c: Regenerate.
	* generated/reshape_r8.c: Regenerate.
	* generated/reshape_c10.c: Regenerate.
	* generated/reshape_c8.c: Regenerate.
	* generated/reshape_i8.c: Regenerate.
	* generated/reshape_i16.c: Regenerate.
	* generated/reshape_r4.c: Regenerate.

	* gcc/testsuite/gfortran.dg/zero_sized_1.f90: Uncomment checks
	for RESHAPE.

From-SVN: r118455

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 51bceea..7a20460 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2006-11-03  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+       PR libfortran/27895
+       * gcc/testsuite/gfortran.dg/zero_sized_1.f90: Uncomment checks
+       for RESHAPE.
+
 2006-11-02  Brooks Moses  <brooks.moses@codesourcery.com>
 
        * lib/gfortran-dg.exp (gfortran-dg-test): Remove expected "In file"

diff --git a/gcc/testsuite/gfortran.dg/zero_sized_1.f90 b/gcc/testsuite/gfortran.dg/zero_sized_1.f90
index c70bddd..224b2c0 100644 (file)
--- a/gcc/testsuite/gfortran.dg/zero_sized_1.f90
+++ b/gcc/testsuite/gfortran.dg/zero_sized_1.f90
@@ -193,5 +193,5 @@ program test
   call test_unpack
   call test_spread
   call test_pack
-!  call test_reshape
+  call test_reshape
 end

diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 54849e0..8b5eddf 100644 (file)
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,21 @@
+2006-11-03  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+       PR libfortran/27895
+       * intrinsics/reshape_generic.c (reshape_internal): Fix so that it
+       works correctly for zero-sized arrays.
+       * m4/reshape.m4: Likewise.
+       * generated/reshape_r16.c: Regenerate.
+       * generated/reshape_c4.c: Regenerate.
+       * generated/reshape_i4.c: Regenerate.
+       * generated/reshape_c16.c: Regenerate.
+       * generated/reshape_r10.c: Regenerate.
+       * generated/reshape_r8.c: Regenerate.
+       * generated/reshape_c10.c: Regenerate.
+       * generated/reshape_c8.c: Regenerate.
+       * generated/reshape_i8.c: Regenerate.
+       * generated/reshape_i16.c: Regenerate.
+       * generated/reshape_r4.c: Regenerate.
+
 2006-10-31  Thomas Koenig  <Thomas.Koenig@online.de>
 
        PR libfortran/29627

diff --git a/libgfortran/generated/reshape_c10.c b/libgfortran/generated/reshape_c10.c
index 7aa7f43..1440e75 100644 (file)
--- a/libgfortran/generated/reshape_c10.c
+++ b/libgfortran/generated/reshape_c10.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_c10 (gfc_array_c10 * const restrict, 
        gfc_array_c10 * const restrict, 
@@ -83,12 +81,13 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
   const GFC_COMPLEX_10 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_COMPLEX_10);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_c16.c b/libgfortran/generated/reshape_c16.c
index cc1fd0d..2ab6111 100644 (file)
--- a/libgfortran/generated/reshape_c16.c
+++ b/libgfortran/generated/reshape_c16.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_c16 (gfc_array_c16 * const restrict, 
        gfc_array_c16 * const restrict, 
@@ -83,12 +81,13 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
   const GFC_COMPLEX_16 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_COMPLEX_16);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_c4.c b/libgfortran/generated/reshape_c4.c
index 5e7d855..66b1622 100644 (file)
--- a/libgfortran/generated/reshape_c4.c
+++ b/libgfortran/generated/reshape_c4.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_c4 (gfc_array_c4 * const restrict, 
        gfc_array_c4 * const restrict, 
@@ -83,12 +81,13 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
   const GFC_COMPLEX_4 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_COMPLEX_4);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_c8.c b/libgfortran/generated/reshape_c8.c
index aecacac..8931653 100644 (file)
--- a/libgfortran/generated/reshape_c8.c
+++ b/libgfortran/generated/reshape_c8.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_c8 (gfc_array_c8 * const restrict, 
        gfc_array_c8 * const restrict, 
@@ -83,12 +81,13 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
   const GFC_COMPLEX_8 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_COMPLEX_8);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_i16.c b/libgfortran/generated/reshape_i16.c
index 0b4da5c..c8777cf 100644 (file)
--- a/libgfortran/generated/reshape_i16.c
+++ b/libgfortran/generated/reshape_i16.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_16 (gfc_array_i16 * const restrict, 
        gfc_array_i16 * const restrict, 
@@ -83,12 +81,13 @@ reshape_16 (gfc_array_i16 * const restrict ret,
   const GFC_INTEGER_16 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_16 (gfc_array_i16 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_16 (gfc_array_i16 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_16 (gfc_array_i16 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_16 (gfc_array_i16 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_INTEGER_16);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_16 (gfc_array_i16 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_i4.c b/libgfortran/generated/reshape_i4.c
index 413762e..f51b730 100644 (file)
--- a/libgfortran/generated/reshape_i4.c
+++ b/libgfortran/generated/reshape_i4.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_4 (gfc_array_i4 * const restrict, 
        gfc_array_i4 * const restrict, 
@@ -83,12 +81,13 @@ reshape_4 (gfc_array_i4 * const restrict ret,
   const GFC_INTEGER_4 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_4 (gfc_array_i4 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_4 (gfc_array_i4 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_4 (gfc_array_i4 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_4 (gfc_array_i4 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_INTEGER_4);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_4 (gfc_array_i4 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_i8.c b/libgfortran/generated/reshape_i8.c
index 0cd861a..463919d 100644 (file)
--- a/libgfortran/generated/reshape_i8.c
+++ b/libgfortran/generated/reshape_i8.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_8 (gfc_array_i8 * const restrict, 
        gfc_array_i8 * const restrict, 
@@ -83,12 +81,13 @@ reshape_8 (gfc_array_i8 * const restrict ret,
   const GFC_INTEGER_8 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_8 (gfc_array_i8 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_8 (gfc_array_i8 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_8 (gfc_array_i8 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_8 (gfc_array_i8 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_INTEGER_8);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_8 (gfc_array_i8 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_r10.c b/libgfortran/generated/reshape_r10.c
index 5069e45..c3d4143 100644 (file)
--- a/libgfortran/generated/reshape_r10.c
+++ b/libgfortran/generated/reshape_r10.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_r10 (gfc_array_r10 * const restrict, 
        gfc_array_r10 * const restrict, 
@@ -83,12 +81,13 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
   const GFC_REAL_10 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_REAL_10);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_r16.c b/libgfortran/generated/reshape_r16.c
index d954c43..a8ba40b 100644 (file)
--- a/libgfortran/generated/reshape_r16.c
+++ b/libgfortran/generated/reshape_r16.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_r16 (gfc_array_r16 * const restrict, 
        gfc_array_r16 * const restrict, 
@@ -83,12 +81,13 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
   const GFC_REAL_16 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_REAL_16);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_r4.c b/libgfortran/generated/reshape_r4.c
index 72eb06e..b03900a 100644 (file)
--- a/libgfortran/generated/reshape_r4.c
+++ b/libgfortran/generated/reshape_r4.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_r4 (gfc_array_r4 * const restrict, 
        gfc_array_r4 * const restrict, 
@@ -83,12 +81,13 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
   const GFC_REAL_4 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_REAL_4);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/generated/reshape_r8.c b/libgfortran/generated/reshape_r8.c
index 065fb3d..2a3e733 100644 (file)
--- a/libgfortran/generated/reshape_r8.c
+++ b/libgfortran/generated/reshape_r8.c
@@ -37,8 +37,6 @@ Boston, MA 02110-1301, USA.  */
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
 
 extern void reshape_r8 (gfc_array_r8 * const restrict, 
        gfc_array_r8 * const restrict, 
@@ -83,12 +81,13 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
   const GFC_REAL_8 *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -130,13 +129,17 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -148,13 +151,18 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -166,6 +174,7 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -183,6 +192,24 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (GFC_REAL_8);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -192,6 +219,7 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])

diff --git a/libgfortran/intrinsics/reshape_generic.c b/libgfortran/intrinsics/reshape_generic.c
index 97860b6..c58fab0 100644 (file)
--- a/libgfortran/intrinsics/reshape_generic.c
+++ b/libgfortran/intrinsics/reshape_generic.c
@@ -37,9 +37,6 @@ Boston, MA 02110-1301, USA.  */
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 typedef GFC_ARRAY_DESCRIPTOR(GFC_MAX_DIMENSIONS, char) parray;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
-
 static void
 reshape_internal (parray *ret, parray *source, shape_type *shape,
                  parray *pad, shape_type *order, index_type size)
@@ -73,12 +70,13 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
   const char *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -120,13 +118,17 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -138,13 +140,18 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+              pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -156,6 +163,7 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -173,6 +181,24 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
   rstride0 = rstride[0] * size;
   sstride0 = sstride[0] * size;
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * size;
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -182,6 +208,7 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])
@@ -204,7 +231,8 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
               rcount[n]++;
               rptr += rstride[n] * size;
             }
-        }
+       }
+
       /* Advance to the next source element.  */
       n = 0;
       while (scount[n] == sextent[n])

diff --git a/libgfortran/m4/reshape.m4 b/libgfortran/m4/reshape.m4
index ed594fb..345837a 100644 (file)
--- a/libgfortran/m4/reshape.m4
+++ b/libgfortran/m4/reshape.m4
@@ -38,9 +38,9 @@ include(iparm.m4)dnl
 
 typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
 
-/* The shape parameter is ignored. We can currently deduce the shape from the
-   return array.  */
-dnl Only the kind (ie size) is used to name the function.
+dnl For integer routines, only the kind (ie size) is used to name the
+dnl function.  The same function will be used for integer and logical
+dnl arrays of the same kind.
 
 extern void reshape_`'rtype_ccode (rtype * const restrict, 
        rtype * const restrict, 
@@ -85,12 +85,13 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
   const rtype_name *src;
   int n;
   int dim;
+  int sempty, pempty;
 
   if (ret->data == NULL)
     {
       rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
       rs = 1;
-      for (n=0; n < rdim; n++)
+      for (n = 0; n < rdim; n++)
        {
          ret->dim[n].lbound = 0;
          rex = shape->data[n * shape->dim[0].stride];
@@ -132,13 +133,17 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
 
   sdim = GFC_DESCRIPTOR_RANK (source);
   ssize = 1;
+  sempty = 0;
   for (n = 0; n < sdim; n++)
     {
       scount[n] = 0;
       sstride[n] = source->dim[n].stride;
       sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
       if (sextent[n] <= 0)
-        abort ();
+       {
+         sempty = 1;
+         sextent[n] = 0;
+       }
 
       if (ssize == sstride[n])
         ssize *= sextent[n];
@@ -150,13 +155,18 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
     {
       pdim = GFC_DESCRIPTOR_RANK (pad);
       psize = 1;
+      pempty = 0;
       for (n = 0; n < pdim; n++)
         {
           pcount[n] = 0;
           pstride[n] = pad->dim[n].stride;
           pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
           if (pextent[n] <= 0)
-            abort ();
+           {
+             pempty = 1;
+             pextent[n] = 0;
+           }
+
           if (psize == pstride[n])
             psize *= pextent[n];
           else
@@ -168,6 +178,7 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
     {
       pdim = 0;
       psize = 1;
+      pempty = 1;
       pptr = NULL;
     }
 
@@ -185,6 +196,24 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
   rstride0 = rstride[0];
   sstride0 = sstride[0];
 
+  if (sempty && pempty)
+    abort ();
+
+  if (sempty)
+    {
+      /* Switch immediately to the pad array.  */
+      src = pptr;
+      sptr = NULL;
+      sdim = pdim;
+      for (dim = 0; dim < pdim; dim++)
+       {
+         scount[dim] = pcount[dim];
+         sextent[dim] = pextent[dim];
+         sstride[dim] = pstride[dim];
+         sstride0 = sstride[0] * sizeof (rtype_name);
+       }
+    }
+
   while (rptr)
     {
       /* Select between the source and pad arrays.  */
@@ -194,6 +223,7 @@ reshape_`'rtype_ccode (rtype * const restrict ret,
       src += sstride0;
       rcount[0]++;
       scount[0]++;
+
       /* Advance to the next destination element.  */
       n = 0;
       while (rcount[n] == rextent[n])