bjoernager/rust
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safe transmute: revise safety analysis

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Migrate to a simplified safety analysis that does not use visibility.

Closes https://github.com/rust-lang/project-safe-transmute/issues/15
This commit is contained in:
Jack Wrenn 2024-02-26 16:49:25 +00:00
parent 9afdb8d1d5
commit 23ab1bda92
127 changed files with 1387 additions and 1948 deletions
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3
compiler/rustc_trait_selection/src/solve/trait_goals.rs
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@ -543,14 +543,13 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
let args = ecx.tcx().erase_regions(goal.predicate.trait_ref.args);
let Some(assume) =
rustc_transmute::Assume::from_const(ecx.tcx(), goal.param_env, args.const_at(3))
rustc_transmute::Assume::from_const(ecx.tcx(), goal.param_env, args.const_at(2))
else {
return Err(NoSolution);
};
let certainty = ecx.is_transmutable(
rustc_transmute::Types { dst: args.type_at(0), src: args.type_at(1) },
args.type_at(2),
assume,
)?;
ecx.evaluate_added_goals_and_make_canonical_response(certainty)