Codegen new intrinsic raw_eq#331
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adpaco-aws merged 1 commit intomodel-checking:main-153-2021-07-15from Jul 15, 2021
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Codegen new intrinsic raw_eq#331adpaco-aws merged 1 commit intomodel-checking:main-153-2021-07-15from
raw_eq#331adpaco-aws merged 1 commit intomodel-checking:main-153-2021-07-15from
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tedinski
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| // TODO: Handle more cases in this intrinsic by looking into the parameters' layouts. | ||
| // TODO: Fix soundness issues in this intrinsic. It's UB to call `raw_eq` if any of | ||
| // the bytes in the first or second arguments are uninitialized. |
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Are there things we could assert on here? Or for the first TODO would it already crash in the unhandled cases?
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The soundness check has to come in before the rest of the code. Then you can decide based on layouts and finally use memcmp for the general case. The cranelift backend does this.
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Description of changes:
This allows us to codegen the intrinsic
raw_eqwhich has been introduced in the latest rebase. See #292 for the report.Resolved issues:
Resolves #330
Unblocks #292
Call-outs:
Codegen can be improved to avoid calling
memcmpin some cases.Testing:
How is this change tested? Existing regression plus one new test for this intrinsic.
Is this a refactor change? No.
Checklist
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.