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Rollup merge of #136627 - RalfJung:mir-validation-cfg-checker, r=compiler-errors

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MIR validation: add comment explaining the limitations of CfgChecker

I hope this right but I am not sure.^^
Cc `@compiler-errors` `@lcnr` `@cjgillot` `@oli-obk`
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Matthias Krüger 2025-02-07 12:01:59 +01:00 • committed by GitHub
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6
compiler/rustc_mir_transform/src/validate.rs
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@ -97,6 +97,12 @@ impl<'tcx> crate::MirPass<'tcx> for Validator {
}
}
/// This checker covers basic properties of the control-flow graph, (dis)allowed statements and terminators.
/// Everything checked here must be stable under substitution of generic parameters. In other words,
/// this is about the *structure* of the MIR, not the *contents*.
///
/// Everything that depends on types, or otherwise can be affected by generic parameters,
/// must be checked in `TypeChecker`.
struct CfgChecker<'a, 'tcx> {
when: &'a str,
body: &'a Body<'tcx>,