2008-10-15 Sebastian Pop <sebastian.pop@amd.com>

	PR tree-optimization/37686
	* testsuite/gcc.dg/tree-ssa/pr37686.c: New.
	* tree-loop-linear.c (linear_transform_loops): Build a
	loop nest vector.  Pass it to lambda_compute_access_matrices.
	* tree-data-ref.h (struct access_matrix): Store the loop nest
	relative to which it encodes the information.
	(AM_LOOP_NEST_NUM): Renamed AM_LOOP_NEST.
	(am_vector_index_for_loop): Reimplemented: iterate over the
	loop nest for finding the loop index in the access matrix.
	(lambda_compute_access_matrices): Update declaration.
	* lambda-code.c (build_access_matrix): Pass the loop nest and
	record it.
	(lambda_compute_access_matrices): Same.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@141141 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 5 insertions, 7 deletions

diff --git a/gcc/lambda-code.c b/gcc/lambda-code.c
index 2fdd898f064..1bf9ddfbf9b 100644
--- a/gcc/lambda-code.c
+++ b/gcc/lambda-code.c
@@ -2786,17 +2786,15 @@ av_for_af (tree access_fun, lambda_vector cy, struct access_matrix *am)
 
 static bool
 build_access_matrix (data_reference_p data_reference,
-		     VEC (tree, heap) *parameters, int loop_nest_num)
+		     VEC (tree, heap) *parameters, VEC (loop_p, heap) *nest)
 {
   struct access_matrix *am = GGC_NEW (struct access_matrix);
   unsigned i, ndim = DR_NUM_DIMENSIONS (data_reference);
-  struct loop *loop = gimple_bb (DR_STMT (data_reference))->loop_father;
-  struct loop *loop_nest = get_loop (loop_nest_num);
-  unsigned nivs = loop_depth (loop) - loop_depth (loop_nest) + 1;
+  unsigned nivs = VEC_length (loop_p, nest);
   unsigned lambda_nb_columns;
   lambda_vector_vec_p matrix;
 
-  AM_LOOP_NEST_NUM (am) = loop_nest_num;
+  AM_LOOP_NEST (am) = nest;
   AM_NB_INDUCTION_VARS (am) = nivs;
   AM_PARAMETERS (am) = parameters;
 
@@ -2824,13 +2822,13 @@ build_access_matrix (data_reference_p data_reference,
 bool
 lambda_compute_access_matrices (VEC (data_reference_p, heap) *datarefs,
 				VEC (tree, heap) *parameters,
-				int loop_nest_num)
+				VEC (loop_p, heap) *nest)
 {
   data_reference_p dataref;
   unsigned ix;
 
   for (ix = 0; VEC_iterate (data_reference_p, datarefs, ix, dataref); ix++)
-    if (!build_access_matrix (dataref, parameters, loop_nest_num))
+    if (!build_access_matrix (dataref, parameters, nest))
       return false;
 
   return true;