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diff src/share/vm/opto/machnode.cpp @ 113:ba764ed4b6f2

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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
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1 8d191a7697e2
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line diff
--- a/src/share/vm/opto/machnode.cpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/src/share/vm/opto/machnode.cpp	Sun Apr 13 17:43:42 2008 -0400
@@ -263,6 +263,13 @@
     // See if it adds up to a base + offset.
     if (index != NULL) {
       if (!index->is_Con()) {
+        const TypeNarrowOop* narrowoop = index->bottom_type()->isa_narrowoop();
+        if (narrowoop != NULL) {
+          // Memory references through narrow oops have a
+          // funny base so grab the type from the index.
+          adr_type = narrowoop->make_oopptr();
+          return NULL;
+        }
         disp = Type::OffsetBot;
       } else if (disp != Type::OffsetBot) {
         const TypeX* ti = index->bottom_type()->isa_intptr_t();