6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

1 files changed, 1 insertions, 0 deletions

diff --git a/src/share/vm/opto/superword.cpp b/src/share/vm/opto/superword.cpp
index b9b8a98bb..5e3a7bb70 100644
--- a/src/share/vm/opto/superword.cpp
+++ b/src/share/vm/opto/superword.cpp
@@ -1424,6 +1424,7 @@ int SuperWord::memory_alignment(MemNode* s, int iv_adjust_in_bytes) {
 //---------------------------container_type---------------------------
 // Smallest type containing range of values
 const Type* SuperWord::container_type(const Type* t) {
+  if (t->isa_narrowoop()) t = t->is_narrowoop()->make_oopptr();
   if (t->isa_aryptr()) {
     t = t->is_aryptr()->elem();
   }