Bug 152753
| Summary: | B3 should strength-reduce bitops on comparison results | ||
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| Product: | WebKit | Reporter: | Filip Pizlo <fpizlo> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | rmorisset |
| Priority: | P2 | ||
| Version: | WebKit Nightly Build | ||
| Hardware: | All | ||
| OS: | All | ||
| Bug Depends on: | |||
| Bug Blocks: | 154319, 196361 | ||
Filip Pizlo
We know that the result of a comparison is 0 or 1, so a lot of high bits are not set. We can use this to strength-reduce some bitops.
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |