smir: merge identical Constant and ConstOperand types

Author: RalfJung

compiler/rustc_smir/src/rustc_smir/convert/mir.rs

@@ -328,13 +328,13 @@ impl<'tcx> Stable<'tcx> for mir::Operand<'tcx> {
 }
 
 impl<'tcx> Stable<'tcx> for mir::ConstOperand<'tcx> {
-    type T = stable_mir::mir::Constant;
+    type T = stable_mir::mir::ConstOperand;
 
     fn stable(&self, tables: &mut Tables<'_>) -> Self::T {
-        stable_mir::mir::Constant {
+        stable_mir::mir::ConstOperand {
             span: self.span.stable(tables),
             user_ty: self.user_ty.map(|u| u.as_usize()).or(None),
-            literal: self.const_.stable(tables),
+            const_: self.const_.stable(tables),
         }
     }
 }

compiler/stable_mir/src/mir/body.rs

@@ -637,7 +637,7 @@ pub enum AggregateKind {
 pub enum Operand {
     Copy(Place),
     Move(Place),
-    Constant(Constant),
+    Constant(ConstOperand),
 }
 
 #[derive(Clone, Eq, PartialEq)]
@@ -829,13 +829,6 @@ pub type FieldIdx = usize;
 
 type UserTypeAnnotationIndex = usize;
 
-#[derive(Clone, Debug, Eq, PartialEq)]
-pub struct Constant {
-    pub span: Span,
-    pub user_ty: Option<UserTypeAnnotationIndex>,
-    pub literal: MirConst,
-}
-
 /// The possible branch sites of a [TerminatorKind::SwitchInt].
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct SwitchTargets {
@@ -1001,9 +994,9 @@ impl Operand {
     }
 }
 
-impl Constant {
+impl ConstOperand {
     pub fn ty(&self) -> Ty {
-        self.literal.ty()
+        self.const_.ty()
     }
 }
 

compiler/stable_mir/src/mir/pretty.rs

@@ -310,7 +310,7 @@ fn pretty_operand(operand: &Operand) -> String {
         Operand::Move(mv) => {
             format!("move {:?}", mv)
         }
-        Operand::Constant(cnst) => pretty_mir_const(&cnst.literal),
+        Operand::Constant(cnst) => pretty_mir_const(&cnst.const_),
     }
 }
 

compiler/stable_mir/src/mir/visit.rs

@@ -108,8 +108,8 @@ pub trait MirVisitor {
         self.super_ty(ty)
     }
 
-    fn visit_constant(&mut self, constant: &Constant, location: Location) {
-        self.super_constant(constant, location)
+    fn visit_const_operand(&mut self, constant: &ConstOperand, location: Location) {
+        self.super_const_operand(constant, location)
     }
 
     fn visit_mir_const(&mut self, constant: &MirConst, location: Location) {
@@ -366,7 +366,7 @@ pub trait MirVisitor {
                 self.visit_place(place, PlaceContext::NON_MUTATING, location)
             }
             Operand::Constant(constant) => {
-                self.visit_constant(constant, location);
+                self.visit_const_operand(constant, location);
             }
         }
     }
@@ -380,10 +380,10 @@ pub trait MirVisitor {
         let _ = ty;
     }
 
-    fn super_constant(&mut self, constant: &Constant, location: Location) {
-        let Constant { span, user_ty: _, literal } = constant;
+    fn super_const_operand(&mut self, constant: &ConstOperand, location: Location) {
+        let ConstOperand { span, user_ty: _, const_ } = constant;
         self.visit_span(span);
-        self.visit_mir_const(literal, location);
+        self.visit_mir_const(const_, location);
     }
 
     fn super_mir_const(&mut self, constant: &MirConst, location: Location) {

tests/ui-fulldeps/stable-mir/check_transform.rs

@@ -21,7 +21,7 @@ extern crate stable_mir;
 use rustc_smir::rustc_internal;
 use stable_mir::mir::alloc::GlobalAlloc;
 use stable_mir::mir::mono::Instance;
-use stable_mir::mir::{Body, Constant, Operand, Rvalue, StatementKind, TerminatorKind};
+use stable_mir::mir::{Body, ConstOperand, Operand, Rvalue, StatementKind, TerminatorKind};
 use stable_mir::ty::{ConstantKind, MirConst};
 use stable_mir::{CrateDef, CrateItems, ItemKind};
 use std::convert::TryFrom;
@@ -96,7 +96,7 @@ fn change_panic_msg(mut body: Body, new_msg: &str) -> Body {
         match &mut bb.terminator.kind {
             TerminatorKind::Call { args, .. } => {
                 let new_const = MirConst::from_str(new_msg);
-                args[0] = Operand::Constant(Constant {
+                args[0] = Operand::Constant(ConstOperand {
                     literal: new_const,
                     span: bb.terminator.span,
                     user_ty: None,