bjoernager/rust
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Ban ArrayToPointer and MutToConstPointer from runtime MIR

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Apparently MIR borrowck cares about at least one of these for checking variance.

In runtime MIR, though, there's no need for them as `PtrToPtr` does the same thing.

(Banning them simplifies passes like GVN that no longer need to handle multiple cast possibilities.)
This commit is contained in:
Scott McMurray 2024-06-12 01:22:31 -07:00
parent 894f7a4ba6
commit 4630d1b23b
21 changed files with 60 additions and 32 deletions
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6
compiler/rustc_mir_transform/src/lib.rs
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@ -51,11 +51,11 @@ mod abort_unwinding_calls;
mod add_call_guards;
mod add_moves_for_packed_drops;
mod add_retag;
mod add_subtyping_projections;
mod check_alignment;
mod check_const_item_mutation;
mod check_packed_ref;
mod remove_place_mention;
// This pass is public to allow external drivers to perform MIR cleanup
mod add_subtyping_projections;
pub mod cleanup_post_borrowck;
mod copy_prop;
mod coroutine;
@ -94,6 +94,7 @@ mod prettify;
mod promote_consts;
mod ref_prop;
mod remove_noop_landing_pads;
mod remove_place_mention;
mod remove_storage_markers;
mod remove_uninit_drops;
mod remove_unneeded_drops;
@ -103,7 +104,6 @@ mod reveal_all;
mod shim;
mod ssa;
// This pass is public to allow external drivers to perform MIR cleanup
mod check_alignment;
pub mod simplify;
mod simplify_branches;
mod simplify_comparison_integral;