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[tuples] walk_gimple_stmt: handle WCE


The following patch handles walking of GIMPLE_WITH_CLEANUP_EXPRs.  It
looks like a minor oversight when we added WCE tuples.

I also collapsed the common OMP code in walk_gimple_stmt.

Diego, we can also collapse GIMPLE_OMP_FOR, but I'm not sure whether
it is semantically safe to walk the PRE_BODY before the OMP_BODY.  Can I
walk the PRE_BODY, and fall through for the GIMPLE_OMP_FOR code?

	* gimple.c (walk_gimple_stmt): Collapse common code.
	Add case for GIMPLE_WITH_CLEANUP_EXPR.

Index: gimple.c
===================================================================
--- gimple.c	(revision 133138)
+++ gimple.c	(working copy)
@@ -1492,16 +1492,13 @@ walk_gimple_stmt (gimple_stmt_iterator *
       break;
 
     case GIMPLE_OMP_CRITICAL:
-      ret = walk_gimple_seq (gimple_omp_body (stmt), callback_stmt, callback_op,
-	                     wi);
-      if (ret)
-	return ret;
-      break;
-
     case GIMPLE_OMP_CONTINUE:
     case GIMPLE_OMP_MASTER:
     case GIMPLE_OMP_ORDERED:
     case GIMPLE_OMP_SECTION:
+    case GIMPLE_OMP_PARALLEL:
+    case GIMPLE_OMP_SECTIONS:
+    case GIMPLE_OMP_SINGLE:
       ret = walk_gimple_seq (gimple_omp_body (stmt), callback_stmt, callback_op,
 	                     wi);
       if (ret)
@@ -1519,23 +1516,9 @@ walk_gimple_stmt (gimple_stmt_iterator *
 	return ret;
       break;
 
-    case GIMPLE_OMP_PARALLEL:
-      ret = walk_gimple_seq (gimple_omp_body (stmt), callback_stmt, callback_op,
-	                     wi);
-      if (ret)
-	return ret;
-      break;
-
-    case GIMPLE_OMP_SECTIONS:
-      ret = walk_gimple_seq (gimple_omp_body (stmt), callback_stmt, callback_op,
-	                     wi);
-      if (ret)
-	return ret;
-      break;
-
-    case GIMPLE_OMP_SINGLE:
-      ret = walk_gimple_seq (gimple_omp_body (stmt), callback_stmt, callback_op,
-	                     wi);
+    case GIMPLE_WITH_CLEANUP_EXPR:
+      ret = walk_gimple_seq (gimple_wce_cleanup (stmt), callback_stmt,
+			     callback_op, wi);
       if (ret)
 	return ret;
       break;


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