bjoernager/rust
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Const-prop pointers.

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This commit is contained in:
Camille GILLOT 2024-01-06 02:36:25 +00:00
parent 5a6f14c4f4
commit d50f26e409
10 changed files with 198 additions and 68 deletions
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13
compiler/rustc_mir_transform/src/gvn.rs
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@ -561,6 +561,19 @@ impl<'body, 'tcx> VnState<'body, 'tcx> {
.ok()?;
dest.into()
}
CastKind::FnPtrToPtr
| CastKind::PtrToPtr
| CastKind::PointerCoercion(
ty::adjustment::PointerCoercion::MutToConstPointer
| ty::adjustment::PointerCoercion::ArrayToPointer
| ty::adjustment::PointerCoercion::UnsafeFnPointer,
) => {
let src = self.evaluated[value].as_ref()?;
let src = self.ecx.read_immediate(src).ok()?;
let to = self.ecx.layout_of(to).ok()?;
let ret = self.ecx.ptr_to_ptr(&src, to).ok()?;
ret.into()
}
_ => return None,
},
};