Make two transmute-related MIR lints into HIR lint #141551
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
compiler-errors
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May 25, 2025
| @@ -1,7 +1,9 @@ | |||
| #![deny(ptr_to_integer_transmute_in_consts)] | |||
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I made this test into a hard error for the lint, and removed the //~^ ERROR annotation in fn main, since we can't mix normal errors and lints since they happen after normal checking has happened.
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| cx.tcx.node_span_lint(UNNECESSARY_TRANSMUTES, expr.hir_id, expr.span, |diag| { |
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I chose to be lazy and use the old diagnostic machinery for the UNNECESSARY_TRANSMUTES lint, since it's kind of a pain in the ass to make it work "correctly" w/ the new machinery.
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@bors rollup |
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Rollup of 8 pull requests Successful merges: - #140367 (add `asm_cfg`: `#[cfg(...)]` within `asm!`) - #140894 (Make check-cfg diagnostics work in `#[doc(cfg(..))]`) - #141252 (gvn: bail out unavoidable non-ssa locals in repeat) - #141517 (rustdoc: use descriptive tooltip if doctest is conditionally ignored) - #141551 (Make two transmute-related MIR lints into HIR lint) - #141591 (ci: fix llvm test coverage) - #141647 (Bump master `stage0` compiler) - #141659 (Add `Result::map_or_default` and `Option::map_or_default`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #141551 - compiler-errors:hir-lints, r=BoxyUwU Make two transmute-related MIR lints into HIR lint Make `PTR_TO_INTEGER_TRANSMUTE_IN_CONSTS` (#130540) and `UNNECESSARY_TRANSMUTES` (#136083) into "normal" HIR-based lints. Funny enough this came up in the review of the latter (#136083 (comment)), but I guess it just was overlooked. But anywyas, there's no reason for these to be MIR lints; in fact, it makes the suggestions for them a bit more complicated than necessary. Note that there's probably a few more simplifications and improvements to be done here. Follow-ups can be done in a separate PR, especially if they're about the messaging and suggestions themselves, which I didn't write.
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Rollup of 8 pull requests Successful merges: - rust-lang/rust#140367 (add `asm_cfg`: `#[cfg(...)]` within `asm!`) - rust-lang/rust#140894 (Make check-cfg diagnostics work in `#[doc(cfg(..))]`) - rust-lang/rust#141252 (gvn: bail out unavoidable non-ssa locals in repeat) - rust-lang/rust#141517 (rustdoc: use descriptive tooltip if doctest is conditionally ignored) - rust-lang/rust#141551 (Make two transmute-related MIR lints into HIR lint) - rust-lang/rust#141591 (ci: fix llvm test coverage) - rust-lang/rust#141647 (Bump master `stage0` compiler) - rust-lang/rust#141659 (Add `Result::map_or_default` and `Option::map_or_default`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 8 pull requests Successful merges: - rust-lang#140367 (add `asm_cfg`: `#[cfg(...)]` within `asm!`) - rust-lang#140894 (Make check-cfg diagnostics work in `#[doc(cfg(..))]`) - rust-lang#141252 (gvn: bail out unavoidable non-ssa locals in repeat) - rust-lang#141517 (rustdoc: use descriptive tooltip if doctest is conditionally ignored) - rust-lang#141551 (Make two transmute-related MIR lints into HIR lint) - rust-lang#141591 (ci: fix llvm test coverage) - rust-lang#141647 (Bump master `stage0` compiler) - rust-lang#141659 (Add `Result::map_or_default` and `Option::map_or_default`) r? `@ghost` `@rustbot` modify labels: rollup
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Make
PTR_TO_INTEGER_TRANSMUTE_IN_CONSTS(#130540) andUNNECESSARY_TRANSMUTES(#136083) into "normal" HIR-based lints.Funny enough this came up in the review of the latter (#136083 (comment)), but I guess it just was overlooked.
But anywyas, there's no reason for these to be MIR lints; in fact, it makes the suggestions for them a bit more complicated than necessary.
Note that there's probably a few more simplifications and improvements to be done here. Follow-ups can be done in a separate PR, especially if they're about the messaging and suggestions themselves, which I didn't write.