Make CTFE able to check for UB...#78407

Merged

bors merged 21 commits into

rust-lang:masterfrom

oli-obk:ub_checkable_ctfe

Jan 12, 2021

Commits on Jan 4, 2021

Stop optimizing promoteds

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Make `encode_optimized_mir` always perform its action and instead require the callers to know whether they actually want this

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Remove mir encode calls that didn't actually encode anything

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Limit trait item mir encoding to items with default bodies

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Require the `encode_promoted_mir` caller to know whether MIR for this item actually exists

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Keep an unoptimized duplicate of `const fn` around

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Differentiate between the availability of ctfe MIR and runtime MIR
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Simplify the `optimize_mir` query
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Polymorphization should look at the runtime MIR of `const fn`
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Comment nit
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Document all the things
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Adjust imports
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Move MIR body loading to a machine function
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Small comment adjustments
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Fix wording of query description
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No doc comments on expressions
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Update stderr files after rebase
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Do not run const prop on the `mir_for_ctfe` of `const fn`
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Commits on Jan 5, 2021

Remove a FIXME and explain the decision
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Commits on Jan 11, 2021

--emit=mir now emits both `mir_for_ctfe` and `optimized_mir` for `const fn`
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Commits on Jan 12, 2021

Coverage computation needs access to the MIR, too
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