re PR middle-end/33880 (ICE: in extract_omp_for_data, at omp-low.c:162)

	PR middle-end/33880
	* tree-nested.c (walk_omp_for): New function.
	(convert_nonlocal_reference, convert_local_reference): Call
	walk_omp_for on OMP_FOR.
	(convert_call_expr): Call walk_body on OMP_FOR's
	OMP_FOR_PRE_INIT_BODY.

	* testsuite/libgomp.c/pr33880.c: New test.
	* testsuite/libgomp.fortran/pr33880.f90: New test.

From-SVN: r131825

1 files changed, 70 insertions, 1 deletions

diff --git a/gcc/tree-nested.c b/gcc/tree-nested.c
index 118f5fe..08f3eb1 100644
--- a/gcc/tree-nested.c
+++ b/gcc/tree-nested.c
@@ -1,5 +1,5 @@
 /* Nested function decomposition for trees.
-   Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -665,6 +665,59 @@ walk_function (walk_tree_fn callback, struct nesting_info *info)
   walk_body (callback, info, &DECL_SAVED_TREE (info->context));
 }
 
+/* Invoke CALLBACK on OMP_FOR init, cond, incr and pre-body.  */
+
+static void
+walk_omp_for (walk_tree_fn callback, struct nesting_info *info, tree for_stmt)
+{
+  struct walk_stmt_info wi;
+  tree t, list = NULL, empty;
+
+  walk_body (callback, info, &OMP_FOR_PRE_BODY (for_stmt));
+
+  empty = build_empty_stmt ();
+  append_to_statement_list_force (empty, &list);
+  memset (&wi, 0, sizeof (wi));
+  wi.callback = callback;
+  wi.info = info;
+  wi.tsi = tsi_last (list);
+
+  t = OMP_FOR_INIT (for_stmt);
+  gcc_assert (TREE_CODE (t) == GIMPLE_MODIFY_STMT);
+  SET_EXPR_LOCUS (empty, EXPR_LOCUS (t));
+  wi.val_only = false;
+  walk_tree (&GIMPLE_STMT_OPERAND (t, 0), callback, &wi, NULL);
+  wi.val_only = true;
+  wi.is_lhs = false;
+  walk_tree (&GIMPLE_STMT_OPERAND (t, 1), callback, &wi, NULL);
+
+  t = OMP_FOR_COND (for_stmt);
+  gcc_assert (COMPARISON_CLASS_P (t));
+  SET_EXPR_LOCUS (empty, EXPR_LOCUS (t));
+  wi.val_only = false;
+  walk_tree (&TREE_OPERAND (t, 0), callback, &wi, NULL);
+  wi.val_only = true;
+  wi.is_lhs = false;
+  walk_tree (&TREE_OPERAND (t, 1), callback, &wi, NULL);
+
+  t = OMP_FOR_INCR (for_stmt);
+  gcc_assert (TREE_CODE (t) == GIMPLE_MODIFY_STMT);
+  SET_EXPR_LOCUS (empty, EXPR_LOCUS (t));
+  wi.val_only = false;
+  walk_tree (&GIMPLE_STMT_OPERAND (t, 0), callback, &wi, NULL);
+  t = GIMPLE_STMT_OPERAND (t, 1);
+  gcc_assert (BINARY_CLASS_P (t));
+  wi.val_only = false;
+  walk_tree (&TREE_OPERAND (t, 0), callback, &wi, NULL);
+  wi.val_only = true;
+  wi.is_lhs = false;
+  walk_tree (&TREE_OPERAND (t, 1), callback, &wi, NULL);
+
+  /* Remove empty statement added above from the end of statement list.  */
+  tsi_delink (&wi.tsi);
+  append_to_statement_list (list, &OMP_FOR_PRE_BODY (for_stmt));
+}
+
 /* Similarly for ROOT and all functions nested underneath, depth first.  */
     
 static void
@@ -1065,6 +1118,13 @@ convert_nonlocal_reference (tree *tp, int *walk_subtrees, void *data)
       break;
 
     case OMP_FOR:
+      save_suppress = info->suppress_expansion;
+      convert_nonlocal_omp_clauses (&OMP_FOR_CLAUSES (t), wi);
+      walk_omp_for (convert_nonlocal_reference, info, t);
+      walk_body (convert_nonlocal_reference, info, &OMP_FOR_BODY (t));
+      info->suppress_expansion = save_suppress;
+      break;
+
     case OMP_SECTIONS:
     case OMP_SINGLE:
       save_suppress = info->suppress_expansion;
@@ -1350,6 +1410,13 @@ convert_local_reference (tree *tp, int *walk_subtrees, void *data)
       break;
 
     case OMP_FOR:
+      save_suppress = info->suppress_expansion;
+      convert_local_omp_clauses (&OMP_FOR_CLAUSES (t), wi);
+      walk_omp_for (convert_local_reference, info, t);
+      walk_body (convert_local_reference, info, &OMP_FOR_BODY (t));
+      info->suppress_expansion = save_suppress;
+      break;
+
     case OMP_SECTIONS:
     case OMP_SINGLE:
       save_suppress = info->suppress_expansion;
@@ -1682,6 +1749,8 @@ convert_call_expr (tree *tp, int *walk_subtrees, void *data)
       break;
 
     case OMP_FOR:
+      walk_body (convert_call_expr, info, &OMP_FOR_PRE_BODY (t));
+      /* FALLTHRU */
     case OMP_SECTIONS:
     case OMP_SECTION:
     case OMP_SINGLE: