re PR tree-optimization/50913 (ICE in scan_tree_for_params_right_scev, at…

re PR tree-optimization/50913 (ICE in scan_tree_for_params_right_scev, at graphite-sese-to-poly.c:633 compiling libgfortran with -floop-interchange -m32)

2012-01-10  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/50913
	* graphite-scop-detection.c (stmt_has_simple_data_refs_p):
	Require data-refs to be representable by Graphite with respect
	to any loop nest.

	* gcc.dg/graphite/interchange-16.c: New testcase.
	* gcc.dg/graphite/scop-20.c: XFAIL.
	* gfortran.dg/graphite/interchange-1.f: Likewise.
	* gfortran.dg/graphite/block-1.f90: Likewise.
	* gfortran.dg/graphite/block-2.f: Likewise.

From-SVN: r183055

gcc/ChangeLog

+2012-01-10  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/50913
+	* graphite-scop-detection.c (stmt_has_simple_data_refs_p):
+	Require data-refs to be representable by Graphite with respect
+	to any loop nest.
+
 2012-01-10  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/constraints.md ("L"): Return true for 0xffffffff.

gcc/graphite-scop-detection.c

@@ -258,25 +258,33 @@ graphite_can_represent_expr (basic_block scop_entry, loop_p loop,
    Graphite.  */
 
 static bool
-stmt_has_simple_data_refs_p (loop_p outermost_loop, gimple stmt)
+stmt_has_simple_data_refs_p (loop_p outermost_loop ATTRIBUTE_UNUSED,
+			     gimple stmt)
 {
   data_reference_p dr;
   unsigned i;
   int j;
   bool res = true;
-  VEC (data_reference_p, heap) *drs = VEC_alloc (data_reference_p, heap, 5);
+  VEC (data_reference_p, heap) *drs = NULL;
+  loop_p outer;
 
-  graphite_find_data_references_in_stmt (outermost_loop,
-					 loop_containing_stmt (stmt),
-					 stmt, &drs);
+  for (outer = loop_containing_stmt (stmt); outer; outer = loop_outer (outer))
+    {
+      graphite_find_data_references_in_stmt (outer,
+					     loop_containing_stmt (stmt),
+					     stmt, &drs);
 
-  FOR_EACH_VEC_ELT (data_reference_p, drs, j, dr)
-    for (i = 0; i < DR_NUM_DIMENSIONS (dr); i++)
-      if (!graphite_can_represent_scev (DR_ACCESS_FN (dr, i)))
-	{
-	  res = false;
-	  goto done;
-	}
+      FOR_EACH_VEC_ELT (data_reference_p, drs, j, dr)
+	for (i = 0; i < DR_NUM_DIMENSIONS (dr); i++)
+	  if (!graphite_can_represent_scev (DR_ACCESS_FN (dr, i)))
+	    {
+	      res = false;
+	      goto done;
+	    }
+
+      free_data_refs (drs);
+      drs = NULL;
+    }
 
  done:
   free_data_refs (drs);

gcc/testsuite/ChangeLog

+2012-01-10  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/50913
+	* gcc.dg/graphite/interchange-16.c: New testcase.
+	* gcc.dg/graphite/scop-20.c: XFAIL.
+	* gfortran.dg/graphite/interchange-1.f: Likewise.
+	* gfortran.dg/graphite/block-1.f90: Likewise.
+	* gfortran.dg/graphite/block-2.f: Likewise.
+
 2012-01-10  Richard Henderson  <rth@redhat.com>
 
 	* lib/target-supports.exp (check_effective_target_vect_perm,

gcc/testsuite/gcc.dg/graphite/interchange-16.c

+void spread_i1 (int *rptr, int *sptr, int ncopies, int *extent, int rdelta, int m)
+{
+  int *dest;
+  int n;
+
+  while (m--)
+    {
+      dest = rptr;
+      for (n = 0; n < ncopies; n ++)
+	{
+	  *dest = *sptr;
+	  dest += rdelta;
+	}
+      if (extent [n])
+	if (n)
+	  rptr ++;
+    }
+}
+
+int main() { return 0; }
+
+/* { dg-final { cleanup-tree-dump "graphite" } } */

gcc/testsuite/gcc.dg/graphite/scop-20.c

@@ -23,5 +23,5 @@ int toto()
   return a[3][5] + b[1];
 }
 
-/* { dg-final { scan-tree-dump-times "number of SCoPs: 2" 1 "graphite"} } */
+/* { dg-final { scan-tree-dump-times "number of SCoPs: 2" 1 "graphite" { xfail *-*-* } } } */
 /* { dg-final { cleanup-tree-dump "graphite" } } */

gcc/testsuite/gfortran.dg/graphite/block-1.f90

@@ -7,7 +7,7 @@ c=0.d0
 
 end subroutine matrix_multiply
 
-! { dg-final { scan-tree-dump-times "number of SCoPs: 1" 1 "graphite" } }
+! { dg-final { scan-tree-dump-times "number of SCoPs: 1" 1 "graphite" { xfail *-*-* } } }
 ! { dg-final { scan-tree-dump-times "will be loop blocked" 1 "graphite" { xfail *-*-* } } }
 ! { dg-final { cleanup-tree-dump "graphite" } }
 

gcc/testsuite/gfortran.dg/graphite/block-2.f

@@ -16,6 +16,6 @@
       RETURN
       END
 
-! { dg-final { scan-tree-dump-times "number of SCoPs: 2" 1 "graphite" } }
+! { dg-final { scan-tree-dump-times "number of SCoPs: 2" 1 "graphite" { xfail *-*-* } } }
 ! { dg-final { scan-tree-dump-times "will be loop blocked" 2 "graphite" { xfail *-*-* } } }
 ! { dg-final { cleanup-tree-dump "graphite" } }

gcc/testsuite/gfortran.dg/graphite/interchange-1.f

@@ -41,5 +41,5 @@
 ! known to be 4 in the inner two loops.  See interchange-2.f for the
 ! kernel from bwaves.
 
-! { dg-final { scan-tree-dump-times "will be interchanged" 1 "graphite" } }
+! { dg-final { scan-tree-dump-times "will be interchanged" 1 "graphite" { xfail *-*-* } } }
 ! { dg-final { cleanup-tree-dump "graphite" } }