Closed
Bug 1039976
Opened 11 years ago
Closed 11 years ago
Improve TypeObjectDispatch with one case
Categories
(Core :: JavaScript Engine: JIT, defect)
Tracking
()
RESOLVED
FIXED
mozilla34
People
(Reporter: h4writer, Assigned: h4writer)
Details
Attachments
(1 file)
|
2.21 KB,
patch
|
jandem
:
review+
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Details | Diff | Splinter Review |
For MTypeObjectDispatch's with 1 case we generate:
> 0xb793e9b1: mov 0x4(%ebp),%edx
> 0xb793e9b4: cmp $0xb512ca40,%edx
> 0xb793e9ba: je 0xb793e9c6
> 0xb793e9c0: jmp 0xb793f16a
> 0xb793e9c6: ...
Just like we do in "guardObjectType", we can decide to flip the cmp/je. That way we can remove a jump (if the block we are jumping to is the next block):
> 0xb793e9b1: mov 0x4(%ebp),%edx
> 0xb793e9b4: cmp $0xb512ca40,%edx
> 0xb793e9ba: jne 0xb793f164
> 0xb793e9c0: ...
This happens in deltablue. No major gains though.
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Assignee | |
Comment 1•11 years ago
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||
Assignee: nobody → hv1989
Attachment #8457855 -
Flags: review?(jdemooij)
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Updated•11 years ago
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Attachment #8457855 -
Flags: review?(jdemooij) → review+
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Assignee | |
Comment 2•11 years ago
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Status: NEW → RESOLVED
Closed: 11 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla34
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Description
•