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Bug ID: 6705887 Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
6705887 : Compressed Oops: generate x64 addressing and implicit null checks with narrow oops

Details
Type:
Enhancement
Submit Date:
2008-05-21
Status:
Resolved
Updated Date:
2010-06-26
Project Name:
JDK
Resolved Date:
2008-06-12
Component:
hotspot
OS:
solaris_10
Sub-Component:
compiler
CPU:
x86
Priority:
P4
Resolution:
Fixed
Affected Versions:
hs14
Fixed Versions:
hs13

Related Reports
Backport:
JDK-2174934 - Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
Backport:
JDK-2177136 - Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
Relates:
JDK-6732698 - crash with dead code from compressed oops in gcm
Relates:
JDK-6712872 - Move some of narrow oops optimizations from final_graph_reshape to igvn

Sub Tasks

Description
Currently C2 generates explicit narrow oops NULL checks (after 6703890 fix)
and decode narrow oops to form an extended address for x64.

Generate addresses and implicit null checks with narrow oops to avoid decoding.

Comments
EVALUATION

See description.
2008-05-30


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