JDK-8218767 : ZGC: Do not assume that r12 is a special register in C2
Type:Enhancement
Component:hotspot
Sub-Component:gc
Affected Version:13
Priority:P4
Status:Resolved
Resolution:Fixed
Submitted:2019-02-11
Updated:2019-02-27
Resolved:2019-02-20
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Unresolved : Release in which this issue/RFE will be addressed. Resolved: Release in which this issue/RFE has been resolved. Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
The C2 load barrier code for ZGC assumes that r12 is not used as a general purpose register. However, JDK-8217909 might change that, so ZGC should not be making this assumption.