introduce `ty::Value`

Co-authored-by: FedericoBruzzone <federico.bruzzone.i@gmail.com>

4 files changed, 7 insertions, 11 deletions

diff --git a/src/librustdoc/clean/utils.rs b/src/librustdoc/clean/utils.rs
index 77040aeb94d..0b4fd9c2258 100644
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@@ -344,10 +344,8 @@ pub(crate) fn print_const(cx: &DocContext<'_>, n: ty::Const<'_>) -> String {
             s
         }
         // array lengths are obviously usize
-        ty::ConstKind::Value(ty, ty::ValTree::Leaf(scalar))
-            if *ty.kind() == ty::Uint(ty::UintTy::Usize) =>
-        {
-            scalar.to_string()
+        ty::ConstKind::Value(cv) if *cv.ty.kind() == ty::Uint(ty::UintTy::Usize) => {
+            cv.valtree.unwrap_leaf().to_string()
         }
         _ => n.to_string(),
     }
diff --git a/src/tools/clippy/clippy_lints/src/large_const_arrays.rs b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs
index 623b6b4fcc1..cabf10b7e0e 100644
--- a/src/tools/clippy/clippy_lints/src/large_const_arrays.rs
+++ b/src/tools/clippy/clippy_lints/src/large_const_arrays.rs
@@ -56,9 +56,8 @@ impl<'tcx> LateLintPass<'tcx> for LargeConstArrays {
             && !item.span.from_expansion()
             && let ty = cx.tcx.type_of(item.owner_id).instantiate_identity()
             && let ty::Array(element_type, cst) = ty.kind()
-            && let Some((ty::ValTree::Leaf(element_count), _)) = cx.tcx
-                .try_normalize_erasing_regions(cx.typing_env(), *cst).unwrap_or(*cst).try_to_valtree()
-            && let element_count = element_count.to_target_usize(cx.tcx)
+            && let Some(element_count) = cx.tcx
+                .try_normalize_erasing_regions(cx.typing_env(), *cst).unwrap_or(*cst).try_to_target_usize(cx.tcx)
             && let Ok(element_size) = cx.layout_of(*element_type).map(|l| l.size.bytes())
             && u128::from(self.maximum_allowed_size) < u128::from(element_count) * u128::from(element_size)
         {
diff --git a/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs b/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs
index 46d7df6995a..6f5c5d6b3ea 100644
--- a/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs
+++ b/src/tools/clippy/clippy_lints/src/large_stack_arrays.rs
@@ -8,7 +8,7 @@ use clippy_utils::source::snippet;
 use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::layout::LayoutOf;
-use rustc_middle::ty::{self, ConstKind};
+use rustc_middle::ty;
 use rustc_session::impl_lint_pass;
 use rustc_span::{Span, sym};
 
@@ -81,8 +81,7 @@ impl<'tcx> LateLintPass<'tcx> for LargeStackArrays {
             && let ExprKind::Repeat(_, _) | ExprKind::Array(_) = expr.kind
             && !self.is_from_vec_macro(cx, expr.span)
             && let ty::Array(element_type, cst) = cx.typeck_results().expr_ty(expr).kind()
-            && let ConstKind::Value(_, ty::ValTree::Leaf(element_count)) = cst.kind()
-            && let element_count = element_count.to_target_usize(cx.tcx)
+            && let Some(element_count) = cst.try_to_target_usize(cx.tcx)
             && let Ok(element_size) = cx.layout_of(*element_type).map(|l| l.size.bytes())
             && !cx.tcx.hir().parent_iter(expr.hir_id).any(|(_, node)| {
                 matches!(
diff --git a/src/tools/miri/src/intrinsics/simd.rs b/src/tools/miri/src/intrinsics/simd.rs
index 54bdd3f02c2..63a61dcd148 100644
--- a/src/tools/miri/src/intrinsics/simd.rs
+++ b/src/tools/miri/src/intrinsics/simd.rs
@@ -640,7 +640,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 let (dest, dest_len) = this.project_to_simd(dest)?;
 
                 let index =
-                    generic_args[2].expect_const().try_to_valtree().unwrap().0.unwrap_branch();
+                    generic_args[2].expect_const().to_value().valtree.unwrap_branch();
                 let index_len = index.len();
 
                 assert_eq!(left_len, right_len);