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Type:
Enhancement
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Resolution: Fixed
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Priority:
P4
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Affects Version/s: hs12
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Component/s: hotspot
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b02
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sparc
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solaris_10
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Not verified
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-2174830 | 6u14 | Vladimir Kozlov | P3 | Resolved | Fixed | b01 |
| JDK-2172244 | 6u5p | Vladimir Kozlov | P3 | Resolved | Fixed | b01 |
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.
(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.
- backported by
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JDK-2172244 Don't generate duplicated CMP for float/double values
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- Resolved
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- Resolved
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