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diff src/share/vm/opto/stringopts.cpp @ 2383:9dc311b8473e

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7008866: Missing loop predicate for loop with multiple entries Summary: Add predicates when loop head bytecode is parsed instead of when back branch bytecode is parsed. Reviewed-by: never
author kvn
date Mon, 21 Mar 2011 11:28:14 -0700
parents 2ddb2fab82cb
children 0e3ed5a14f73
line wrap: on
line diff
--- a/src/share/vm/opto/stringopts.cpp	Mon Mar 21 02:30:49 2011 -0700
+++ b/src/share/vm/opto/stringopts.cpp	Mon Mar 21 11:28:14 2011 -0700
@@ -969,6 +969,10 @@
     // for (int i=0; ; i++)
     //   if (x <= sizeTable[i])
     //     return i+1;
+
+    // Add loop predicate first.
+    kit.add_predicate();
+
     RegionNode *loop = new (C, 3) RegionNode(3);
     loop->init_req(1, kit.control());
     kit.gvn().set_type(loop, Type::CONTROL);
@@ -1086,6 +1090,9 @@
   // }
 
   {
+    // Add loop predicate first.
+    kit.add_predicate();
+
     RegionNode *head = new (C, 3) RegionNode(3);
     head->init_req(1, kit.control());
     kit.gvn().set_type(head, Type::CONTROL);