Bug 151458
| Summary: | Consider adding value constraints, such as that a value is guaranteed non-negative, to B3 | ||
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| Product: | WebKit | Reporter: | Filip Pizlo <fpizlo> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | ||
| Priority: | P2 | ||
| Version: | WebKit Nightly Build | ||
| Hardware: | All | ||
| OS: | All | ||
| Bug Depends on: | |||
| Bug Blocks: | 154319 | ||
Filip Pizlo
Some options:
- Like LLVM, allow load instructions to specify a range of possible values that it could return.
- Have a LoadUnsigned.
- Have a variant of ZExt/SExt that guarantees that the sign bit is zero.
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |