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Watched Subcomponents
JDK
JDK-8217629
RegMask::find_lowest_bit can reuse count_trailing_zeros utility
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Details
Type:
Enhancement
Status:
Resolved
Priority:
P4
Resolution:
Fixed
Affects Version/s:
13
Fix Version/s:
13
Component/s:
hotspot
Labels:
c2
cleanup
noreg-cleanup
performance
startup
Subcomponent:
compiler
Resolved In Build:
b05
Description
Reusing the count_trailing_zeros utility is a small cleanup to the regmask code. Doing so measurably speeds up the C2 register allocator by a few percent on linux-x64 on startup tests.
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Assignee:
Claes Redestad
Reporter:
Claes Redestad
Votes:
0
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Watchers:
1
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Dates
Created:
2019-01-23 03:52
Updated:
2019-10-12 09:33
Resolved:
2019-01-23 08:38