basic-block.h (tree_node): Forward declare if needed.

2001-07-09  Diego Novillo  <dnovillo@redhat.com>

	* basic-block.h (tree_node): Forward declare if needed.
	(struct basic_block_def): Add fields 'head_tree' and 'end_tree'.
	(BLOCK_HEAD_TREE): Define.
	(BLOCK_END_TREE): Define.
	(struct loops): Rename field 'tree' to 'tree_root'.
	* flow.c (entry_exit_blocks): Add initializers for 'head_tree' and
	'end_tree'.
	(flow_loops_tree_build): Rename reference to field 'tree' to
	'tree_root'.
	(flow_loops_level_compute): Ditto.
	* predict.c (estimate_bb_frequencies): Ditto.
	* tree.h (struct tree_common): Add field 'aux'.

From-SVN: r43886

5 files changed, 37 insertions, 5 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ea2c7c6..f1379c1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,18 @@
+2001-07-09  Diego Novillo  <dnovillo@redhat.com>
+
+	* basic-block.h (tree_node): Forward declare if needed.
+	(struct basic_block_def): Add fields 'head_tree' and 'end_tree'.
+	(BLOCK_HEAD_TREE): Define.
+	(BLOCK_END_TREE): Define.
+	(struct loops): Rename field 'tree' to 'tree_root'.
+	* flow.c (entry_exit_blocks): Add initializers for 'head_tree' and 
+	'end_tree'.
+	(flow_loops_tree_build): Rename reference to field 'tree' to
+	'tree_root'.
+	(flow_loops_level_compute): Ditto.
+	* predict.c (estimate_bb_frequencies): Ditto.
+	* tree.h (struct tree_common): Add field 'aux'.
+
 2001-07-09  Stan Shebs  <shebs@apple.com>
 
 	* config/darwin.c (darwin_encode_section_info): Don't mark any
diff --git a/gcc/basic-block.h b/gcc/basic-block.h
index 256492e..5a2088e 100644
--- a/gcc/basic-block.h
+++ b/gcc/basic-block.h
@@ -26,6 +26,11 @@ Boston, MA 02111-1307, USA.  */
 #include "varray.h"
 #include "partition.h"
 
+#ifndef TREE_CODE
+union tree_node;
+#define tree union tree_node *
+#endif
+
 /* Head of register set linked list.  */
 typedef bitmap_head regset_head;
 /* A pointer to a regset_head.  */
@@ -174,6 +179,10 @@ typedef struct basic_block_def {
   /* The first and last insns of the block.  */
   rtx head, end;
 
+  /* The first and last trees of the block.  */
+  tree head_tree;
+  tree end_tree;
+
   /* The edges into and out of the block.  */
   edge pred, succ;
 
@@ -247,6 +256,9 @@ extern regset regs_live_at_setjmp;
 #define BLOCK_HEAD(B)      (BASIC_BLOCK (B)->head)
 #define BLOCK_END(B)       (BASIC_BLOCK (B)->end)
 
+#define BLOCK_HEAD_TREE(B) (BASIC_BLOCK (B)->head_tree)
+#define BLOCK_END_TREE(B) (BASIC_BLOCK (B)->end_tree)
+
 /* Special block numbers [markers] for entry and exit.  */
 #define ENTRY_BLOCK (-1)
 #define EXIT_BLOCK (-2)
@@ -433,7 +445,7 @@ struct loops
   struct loop *array;
 
   /* Pointer to root of loop heirachy tree.  */
-  struct loop *tree;
+  struct loop *tree_root;
 
   /* Information derived from the CFG.  */
   struct cfg
diff --git a/gcc/flow.c b/gcc/flow.c
index fba78dd..784d21d 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -195,6 +195,8 @@ varray_type basic_block_info;
 struct basic_block_def entry_exit_blocks[2]
 = {{NULL,			/* head */
     NULL,			/* end */
+    NULL,			/* head_tree */
+    NULL,			/* end_tree */
     NULL,			/* pred */
     NULL,			/* succ */
     NULL,			/* local_set */
@@ -210,6 +212,8 @@ struct basic_block_def entry_exit_blocks[2]
   {
     NULL,			/* head */
     NULL,			/* end */
+    NULL,			/* head_tree */
+    NULL,			/* end_tree */
     NULL,			/* pred */
     NULL,			/* succ */
     NULL,			/* local_set */
@@ -8718,8 +8722,8 @@ flow_loops_tree_build (loops)
   /* Root the loop hierarchy tree with the first loop found.
      Since we used a depth first search this should be the
      outermost loop.  */
-  loops->tree = &loops->array[0];
-  loops->tree->outer = loops->tree->inner = loops->tree->next = NULL;
+  loops->tree_root = &loops->array[0];
+  loops->tree_root->outer = loops->tree_root->inner = loops->tree_root->next = NULL;
 
   /* Add the remaining loops to the tree.  */
   for (i = 1; i < num_loops; i++)
@@ -8773,7 +8777,7 @@ flow_loops_level_compute (loops)
   int levels = 0;
 
   /* Traverse all the outer level loops.  */
-  for (loop = loops->tree; loop; loop = loop->next)
+  for (loop = loops->tree_root; loop; loop = loop->next)
     {
       level = flow_loop_level_compute (loop, 1);
       if (level > levels)
diff --git a/gcc/predict.c b/gcc/predict.c
index 8557313..9fed0c9 100644
--- a/gcc/predict.c
+++ b/gcc/predict.c
@@ -806,7 +806,7 @@ estimate_bb_frequencies (loops)
     }
   /* First compute probabilities locally for each loop from innermost
      to outermost to examine probabilities for back edges.  */
-  estimate_loops_at_level (loops->tree);
+  estimate_loops_at_level (loops->tree_root);
 
   /* Now fake loop around whole function to finalize probabilities.  */
   for (i = 0; i < n_basic_blocks; i++)
diff --git a/gcc/tree.h b/gcc/tree.h
index ec7a287..4becd00 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -130,6 +130,7 @@ struct tree_common
 {
   union tree_node *chain;
   union tree_node *type;
+  void *aux;
   ENUM_BITFIELD(tree_code) code : 8;
   unsigned side_effects_flag : 1;
   unsigned constant_flag : 1;