Mercurial Mercurial > jdk-sandbox / changeset
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6930116: loop predication code does not handle If nodes with only one projection
authorkvn
Thu, 25 Feb 2010 22:58:43 -0800
changeset 5031 80fd89e1bd57
parent 5030 b9d96b4469eb
child 5032 785da8592568
6930116: loop predication code does not handle If nodes with only one projection Summary: Add check for iff->outcnt() < 2. Reviewed-by: never
hotspot/src/share/vm/opto/loopTransform.cpp file | annotate | diff | comparison | revisions 
--- a/hotspot/src/share/vm/opto/loopTransform.cpp	Thu Feb 25 15:55:47 2010 -0800
+++ b/hotspot/src/share/vm/opto/loopTransform.cpp	Thu Feb 25 22:58:43 2010 -0800
@@ -1785,6 +1785,8 @@
 bool PhaseIdealLoop::is_uncommon_trap_if_pattern(ProjNode *proj, bool must_reason_predicate) {
   Node *in0 = proj->in(0);
   if (!in0->is_If()) return false;
+  // Variation of a dead If node.
+  if (in0->outcnt() < 2)  return false;
   IfNode* iff = in0->as_If();
 
   // we need "If(Conv2B(Opaque1(...)))" pattern for must_reason_predicate
jdk-sandbox