Mercurial > hg > truffle

diff src/share/vm/opto/loopopts.cpp @ 64:b8f5ba577b02

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6673473: (Escape Analysis) Add the instance's field information to PhiNode Summary: Avoid an infinite generation of instance's field values Phi nodes. Reviewed-by: never
author kvn
date Thu, 13 Mar 2008 16:31:32 -0700
parents e2ae28d2ce91
children 8bb88f9877e5
line wrap: on
line diff
--- a/src/share/vm/opto/loopopts.cpp	Thu Mar 13 16:06:34 2008 -0700
+++ b/src/share/vm/opto/loopopts.cpp	Thu Mar 13 16:31:32 2008 -0700
@@ -32,7 +32,18 @@
   int wins = 0;
   assert( !n->is_CFG(), "" );
   assert( region->is_Region(), "" );
-  Node *phi = new (C, region->req()) PhiNode( region, n->bottom_type() );
+
+  const Type* type = n->bottom_type();
+  const TypeOopPtr *t_oop = _igvn.type(n)->isa_oopptr();
+  Node *phi;
+  if( t_oop != NULL && t_oop->is_instance_field() ) {
+    int iid    = t_oop->instance_id();
+    int index  = C->get_alias_index(t_oop);
+    int offset = t_oop->offset();
+    phi = new (C,region->req()) PhiNode(region, type, NULL, iid, index, offset);
+  } else {
+    phi = new (C,region->req()) PhiNode(region, type);
+  }
   uint old_unique = C->unique();
   for( uint i = 1; i < region->req(); i++ ) {
     Node *x;