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6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions

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Add LoadNKlass and CMoveN nodes, use CmpN and ConN nodes to generate narrow oops compare instructions.

Reviewed-by: never, rasbold
This commit is contained in:
Vladimir Kozlov 2008-05-21 13:46:23 -07:00
parent 757229db71
commit 76035424de
29 changed files with 428 additions and 128 deletions
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3
hotspot/src/share/vm/runtime/globals.hpp
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@ -291,6 +291,9 @@ class CommandLineFlags {
"Use 32-bit object references in 64-bit VM. " \
"lp64_product means flag is always constant in 32 bit VM") \
\
lp64_product(bool, CheckCompressedOops, trueInDebug, \
"generate checks in encoding/decoding code") \
\
/* UseMembar is theoretically a temp flag used for memory barrier \
* removal testing. It was supposed to be removed before FCS but has \
* been re-added (see 6401008) */ \