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diff src/share/vm/opto/loopUnswitch.cpp @ 108:a761c2d3b76a

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6684385: Loop unswitching crashes without LoopNode Summary: Without LoopNode, exit early from loop unswitching and partial peeling Reviewed-by: kvn, never, sgoldman
author rasbold
date Wed, 09 Apr 2008 09:25:45 -0700
parents a61af66fc99e
children d1605aabd0a1 8d191a7697e2
line wrap: on
line diff
--- a/src/share/vm/opto/loopUnswitch.cpp	Tue Apr 08 12:23:15 2008 -0400
+++ b/src/share/vm/opto/loopUnswitch.cpp	Wed Apr 09 09:25:45 2008 -0700
@@ -51,6 +51,9 @@
   if( !LoopUnswitching ) {
     return false;
   }
+  if (!_head->is_Loop()) {
+    return false;
+  }
   uint nodes_left = MaxNodeLimit - phase->C->unique();
   if (2 * _body.size() > nodes_left) {
     return false; // Too speculative if running low on nodes.