2011-06-28 Thomas Koenig <tkoenig@gcc.gnu.org>

	PR fortran/49479
	* m4/reshape.m4: If source allocation is smaller than one, set it
	to one.
	* intrinsics/reshape_generic.c:  Likewise.
	* generated/reshape_r16.c: Regenerated.
	* generated/reshape_c4.c: Regenerated.
	* generated/reshape_c16.c: Regenerated.
	* generated/reshape_c8.c: Regenerated.
	* generated/reshape_r4.c: Regenerated.
	* generated/reshape_i4.c: Regenerated.
	* generated/reshape_r10.c: Regenerated.
	* generated/reshape_r8.c: Regenerated.
	* generated/reshape_c10.c: Regenerated.
	* generated/reshape_i8.c: Regenerated.
	* generated/reshape_i16.c: Regenerated.

2011-06-28  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/49479
	* gfortran.dg/reshape_zerosize_3.f90:  New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175594 138bc75d-0d04-0410-961f-82ee72b054a4

16 files changed, 184 insertions, 13 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d270b3eea9d..77a408639ac 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-06-28  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/49479
+	* gfortran.dg/reshape_zerosize_3.f90:  New test.
+
 2011-06-28  Janis Johnson  <janisjo@codesourcery.com>
 
 	* gcc.target/arm/vfp-ldmdbs.c: Skip for soft float.
diff --git a/gcc/testsuite/gfortran.dg/reshape_zerosize_3.f90 b/gcc/testsuite/gfortran.dg/reshape_zerosize_3.f90
new file mode 100644
index 00000000000..870a76c652e
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/reshape_zerosize_3.f90
@@ -0,0 +1,43 @@
+! { dg-do run }
+! PR 49479 - this used not to print anything.
+! Test case by Joost VandeVondele.
+MODULE M1
+  IMPLICIT NONE
+  type foo
+     character(len=5) :: x
+  end type foo
+CONTAINS
+  SUBROUTINE S1(data)
+    INTEGER, DIMENSION(:), INTENT(IN), &
+         OPTIONAL                               :: DATA
+    character(20) :: line
+    IF (.not. PRESENT(data)) call abort
+    write (unit=line,fmt='(I5)') size(data)
+    if (line /= '    0               ') call abort
+  END SUBROUTINE S1
+
+  subroutine s_type(data)
+    type(foo), dimension(:), intent(in), optional :: data
+    character(20) :: line
+    IF (.not. PRESENT(data)) call abort
+    write (unit=line,fmt='(I5)') size(data)
+    if (line /= '    0               ') call abort
+  end subroutine s_type
+
+  SUBROUTINE S2(N)
+    INTEGER :: N
+    INTEGER, ALLOCATABLE, DIMENSION(:, :)    :: blki
+    type(foo), allocatable, dimension(:, :)  :: bar
+    ALLOCATE(blki(3,N))
+    allocate (bar(3,n))
+    blki=0
+    CALL S1(RESHAPE(blki,(/3*N/)))
+    call s_type(reshape(bar, (/3*N/)))
+  END SUBROUTINE S2
+
+END MODULE M1
+
+USE M1
+CALL S2(0)
+END
+! { dg-final { cleanup-modules "m1" } }
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index b0f0666a3b5..88ee3638d17 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,21 @@
+2011-06-28  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/49479
+	* m4/reshape.m4: If source allocation is smaller than one, set it
+	to one.
+	* intrinsics/reshape_generic.c:  Likewise.
+	* generated/reshape_r16.c: Regenerated.
+	* generated/reshape_c4.c: Regenerated.
+	* generated/reshape_c16.c: Regenerated.
+	* generated/reshape_c8.c: Regenerated.
+	* generated/reshape_r4.c: Regenerated.
+	* generated/reshape_i4.c: Regenerated.
+	* generated/reshape_r10.c: Regenerated.
+	* generated/reshape_r8.c: Regenerated.
+	* generated/reshape_c10.c: Regenerated.
+	* generated/reshape_i8.c: Regenerated.
+	* generated/reshape_i16.c: Regenerated.
+
 2011-06-18  Janne Blomqvist  <jb@gcc.gnu.org>
 
         PR libfortran/49296
diff --git a/libgfortran/generated/reshape_c10.c b/libgfortran/generated/reshape_c10.c
index 34eff9086a0..44446ebfee8 100644
--- a/libgfortran/generated/reshape_c10.c
+++ b/libgfortran/generated/reshape_c10.c
@@ -97,6 +97,8 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_c10 (gfc_array_c10 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_COMPLEX_10));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_COMPLEX_10);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_c16.c b/libgfortran/generated/reshape_c16.c
index 569b76ce4a8..ca588dc2c93 100644
--- a/libgfortran/generated/reshape_c16.c
+++ b/libgfortran/generated/reshape_c16.c
@@ -97,6 +97,8 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_c16 (gfc_array_c16 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_COMPLEX_16));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_COMPLEX_16);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_c4.c b/libgfortran/generated/reshape_c4.c
index c8b7355de37..e16d32c5239 100644
--- a/libgfortran/generated/reshape_c4.c
+++ b/libgfortran/generated/reshape_c4.c
@@ -97,6 +97,8 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_c4 (gfc_array_c4 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_COMPLEX_4));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_COMPLEX_4);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_c8.c b/libgfortran/generated/reshape_c8.c
index 1a390b4509b..c8da0bc5f6a 100644
--- a/libgfortran/generated/reshape_c8.c
+++ b/libgfortran/generated/reshape_c8.c
@@ -97,6 +97,8 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_c8 (gfc_array_c8 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_COMPLEX_8));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_COMPLEX_8);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_i16.c b/libgfortran/generated/reshape_i16.c
index 4f69ce0d287..43fbefc8ccb 100644
--- a/libgfortran/generated/reshape_i16.c
+++ b/libgfortran/generated/reshape_i16.c
@@ -97,6 +97,8 @@ reshape_16 (gfc_array_i16 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_16 (gfc_array_i16 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_INTEGER_16));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_INTEGER_16);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_i4.c b/libgfortran/generated/reshape_i4.c
index 53016bdf597..2c136deeae2 100644
--- a/libgfortran/generated/reshape_i4.c
+++ b/libgfortran/generated/reshape_i4.c
@@ -97,6 +97,8 @@ reshape_4 (gfc_array_i4 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_4 (gfc_array_i4 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_INTEGER_4));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_INTEGER_4);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_i8.c b/libgfortran/generated/reshape_i8.c
index 34620cf6d40..c97b747ee6d 100644
--- a/libgfortran/generated/reshape_i8.c
+++ b/libgfortran/generated/reshape_i8.c
@@ -97,6 +97,8 @@ reshape_8 (gfc_array_i8 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_8 (gfc_array_i8 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_INTEGER_8));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_INTEGER_8);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_r10.c b/libgfortran/generated/reshape_r10.c
index 3bf319aa434..fa3873e1617 100644
--- a/libgfortran/generated/reshape_r10.c
+++ b/libgfortran/generated/reshape_r10.c
@@ -97,6 +97,8 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_r10 (gfc_array_r10 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_REAL_10));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_REAL_10);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_r16.c b/libgfortran/generated/reshape_r16.c
index 6794b506059..c2b6556b017 100644
--- a/libgfortran/generated/reshape_r16.c
+++ b/libgfortran/generated/reshape_r16.c
@@ -97,6 +97,8 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_r16 (gfc_array_r16 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_REAL_16));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_REAL_16);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_r4.c b/libgfortran/generated/reshape_r4.c
index e7bfbfbf538..2b859fca7d8 100644
--- a/libgfortran/generated/reshape_r4.c
+++ b/libgfortran/generated/reshape_r4.c
@@ -97,6 +97,8 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_r4 (gfc_array_r4 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_REAL_4));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_REAL_4);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/generated/reshape_r8.c b/libgfortran/generated/reshape_r8.c
index d0441c0fe5d..49b23524fdb 100644
--- a/libgfortran/generated/reshape_r8.c
+++ b/libgfortran/generated/reshape_r8.c
@@ -97,6 +97,8 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -107,7 +109,13 @@ reshape_r8 (gfc_array_r8 * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof (GFC_REAL_8));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof (GFC_REAL_8);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/intrinsics/reshape_generic.c b/libgfortran/intrinsics/reshape_generic.c
index bb1552aa433..5b39711cea6 100644
--- a/libgfortran/intrinsics/reshape_generic.c
+++ b/libgfortran/intrinsics/reshape_generic.c
@@ -85,6 +85,8 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -95,7 +97,14 @@ reshape_internal (parray *ret, parray *source, shape_type *shape,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * size );
+
+      if (unlikely (rs < 1))
+	alloc_size = 1;
+      else
+	alloc_size = rs * size;
+
+      ret->data = internal_malloc_size (alloc_size);
+
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }
 
diff --git a/libgfortran/m4/reshape.m4 b/libgfortran/m4/reshape.m4
index 4052a5ecc15..d1486f3942e 100644
--- a/libgfortran/m4/reshape.m4
+++ b/libgfortran/m4/reshape.m4
@@ -101,6 +101,8 @@ reshape_'rtype_ccode` ('rtype` * const restrict ret,
 
   if (ret->data == NULL)
     {
+      index_type alloc_size;
+
       rs = 1;
       for (n = 0; n < rdim; n++)
 	{
@@ -111,7 +113,13 @@ reshape_'rtype_ccode` ('rtype` * const restrict ret,
 	  rs *= rex;
 	}
       ret->offset = 0;
-      ret->data = internal_malloc_size ( rs * sizeof ('rtype_name`));
+
+      if (unlikely (rs < 1))
+        alloc_size = 1;
+      else
+        alloc_size = rs * sizeof ('rtype_name`);
+
+      ret->data = internal_malloc_size (alloc_size);
       ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
     }