3be68033b6
Validate CopyForDeref and DerefTemps better and remove them from runtime MIR (split from my WIP rust-lang/rust#145344) This PR: - Removes `Rvalue::CopyForDeref` and `LocalInfo::DerefTemp` from runtime MIR - Using a new mir pass `EraseDerefTemps` - `CopyForDeref(x)` is turned into `Use(Copy(x))` - `DerefTemp` is turned into `Boring` - Not sure if this part is actually necessary, it made more sense in rust-lang/rust#145344 with `DerefTemp` storing actual data that I wanted to keep from having to be kept in sync with the rest of the body in runtime MIR - Checks in validation that `CopyForDeref` and `DerefTemp` are only used together - Removes special handling for `CopyForDeref` from many places - Removes `CopyForDeref` from `custom_mir` reverting rust-lang/rust#111587 - In runtime MIR simple copies can be used instead - In post cleanup analysis MIR it was already wrong to use due to the lack of support for creating `DerefTemp` locals - Possibly this should be its own PR? - Adds an argument to `deref_finder` to avoid creating new `DerefTemp`s and `CopyForDeref` in runtime MIR. - Ideally we would just avoid making intermediate derefs instead of fixing it at the end of a pass / during shim building - Removes some usages of `deref_finder` that I found out don't actually do anything r? oli-obk |
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
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