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Quick Lists
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Bug ID:
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6667588
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Votes
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0
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Synopsis
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Don't generate duplicated CMP for float/double values
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Category
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hotspot:compiler2
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Reported Against
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Release Fixed
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hs12(b02)
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State
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10-Fix Delivered,
request for enhancement
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Priority:
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4-Low
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Related Bugs
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Submit Date
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26-FEB-2008
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Description
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C2 has optimization which replaces diamond graphs with CMove
(method PhaseIdealLoop::conditional_move()).
Each CMove instruction has own Cmp instruction to produce condition flags.
But float/double Cmp is expensive and it would be better to use a diamond graph
if we have more then one move.
Posted Date : 2008-02-26 00:29:13.0
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Work Around
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N/A
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Evaluation
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See description.
Posted Date : 2008-03-03 17:17:11.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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