6891750 (original) (raw)

Prepared by:

never on Wed Oct 14 17:49:23 PDT 2009

Workspace:

/net/smite.sfbay/export/ws/baseline

Compare against:

ssh://hg.openjdk.java.net/jdk7/hotspot-comp-gate/hotspot

Summary of changes:

119 lines changed: 108 ins; 2 del; 9 mod; 3743 unchg

Patch of changes:

<6891750.patch>

Author comments:

6891750: deopt blob kills values in O5
Reviewed-by:

Sometime in 1.5 the deopt blob was rewritten to use I5 to hold a copy
of the current deoptimization mode instead of O5. Before
save_live_registers I5 is actually O5 which might contain a live value
on 64 bit since we rely on register windows to save those values. In
32-bit mode the O registers are explicitly saved since they might
contain 64 bit values. The fix is simply to use an L register as a
cache like we do for G2_thread. I also changed the name from
exception_tmp to deopt_mode since that makes more sense and deleted a
dead declaration.

This was found during JRTS testing of the 64-bit C1 port. Tested with
failing test case.

Legend:

Modified file
Deleted file
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