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Evaluate computed values to constants.

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This commit is contained in:
Camille GILLOT
2023-09-19 20:12:48 +00:00
parent afd631cc0c
commit 38c86b0798
15 changed files with 546 additions and 191 deletions
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11
compiler/rustc_const_eval/src/interpret/discriminant.rs
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@@ -1,7 +1,8 @@
//! Functions for reading and writing discriminants of multi-variant layouts (enums and coroutines).
use rustc_middle::ty::layout::{LayoutOf, PrimitiveExt, TyAndLayout};
use rustc_middle::{mir, ty};
use rustc_middle::mir;
use rustc_middle::ty::layout::{LayoutOf, PrimitiveExt};
use rustc_middle::ty::{self, Ty};
use rustc_target::abi::{self, TagEncoding};
use rustc_target::abi::{VariantIdx, Variants};
@@ -244,11 +245,11 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
pub fn discriminant_for_variant(
&self,
layout: TyAndLayout<'tcx>,
ty: Ty<'tcx>,
variant: VariantIdx,
) -> InterpResult<'tcx, ImmTy<'tcx, M::Provenance>> {
let discr_layout = self.layout_of(layout.ty.discriminant_ty(*self.tcx))?;
let discr_value = match layout.ty.discriminant_for_variant(*self.tcx, variant) {
let discr_layout = self.layout_of(ty.discriminant_ty(*self.tcx))?;
let discr_value = match ty.discriminant_for_variant(*self.tcx, variant) {
Some(discr) => {
// This type actually has discriminants.
assert_eq!(discr.ty, discr_layout.ty);