Rollup merge of #100003 - nnethercote:improve-size-assertions, r=lqd

Improve size assertions.

- For any file with four or more size assertions, move them into a
  separate module (as is already done for `hir.rs`).
- Add some more for AST nodes and THIR nodes.
- Put the `hir.rs` ones in alphabetical order.

r? `@lqd`

2 files changed, 23 insertions, 27 deletions

diff --git a/compiler/rustc_const_eval/src/interpret/operand.rs b/compiler/rustc_const_eval/src/interpret/operand.rs
index de284bd3bae..94ba62c160c 100644
--- a/compiler/rustc_const_eval/src/interpret/operand.rs
+++ b/compiler/rustc_const_eval/src/interpret/operand.rs
@@ -37,9 +37,6 @@ pub enum Immediate<Prov: Provenance = AllocId> {
     Uninit,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(Immediate, 56);
-
 impl<Prov: Provenance> From<ScalarMaybeUninit<Prov>> for Immediate<Prov> {
     #[inline(always)]
     fn from(val: ScalarMaybeUninit<Prov>) -> Self {
@@ -117,9 +114,6 @@ pub struct ImmTy<'tcx, Prov: Provenance = AllocId> {
     pub layout: TyAndLayout<'tcx>,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(ImmTy<'_>, 72);
-
 impl<Prov: Provenance> std::fmt::Display for ImmTy<'_, Prov> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         /// Helper function for printing a scalar to a FmtPrinter
@@ -187,9 +181,6 @@ pub enum Operand<Prov: Provenance = AllocId> {
     Indirect(MemPlace<Prov>),
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(Operand, 64);
-
 #[derive(Clone, Debug)]
 pub struct OpTy<'tcx, Prov: Provenance = AllocId> {
     op: Operand<Prov>, // Keep this private; it helps enforce invariants.
@@ -204,9 +195,6 @@ pub struct OpTy<'tcx, Prov: Provenance = AllocId> {
     pub align: Option<Align>,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(OpTy<'_>, 88);
-
 impl<'tcx, Prov: Provenance> std::ops::Deref for OpTy<'tcx, Prov> {
     type Target = Operand<Prov>;
     #[inline(always)]
@@ -830,3 +818,14 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         })
     }
 }
+
+// Some nodes are used a lot. Make sure they don't unintentionally get bigger.
+#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
+mod size_asserts {
+    use super::*;
+    // These are in alphabetical order, which is easy to maintain.
+    rustc_data_structures::static_assert_size!(Immediate, 56);
+    rustc_data_structures::static_assert_size!(ImmTy<'_>, 72);
+    rustc_data_structures::static_assert_size!(Operand, 64);
+    rustc_data_structures::static_assert_size!(OpTy<'_>, 88);
+}
diff --git a/compiler/rustc_const_eval/src/interpret/place.rs b/compiler/rustc_const_eval/src/interpret/place.rs
index 473da71a0ab..f4571a1ca3d 100644
--- a/compiler/rustc_const_eval/src/interpret/place.rs
+++ b/compiler/rustc_const_eval/src/interpret/place.rs
@@ -25,9 +25,6 @@ pub enum MemPlaceMeta<Prov: Provenance = AllocId> {
     None,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(MemPlaceMeta, 24);
-
 impl<Prov: Provenance> MemPlaceMeta<Prov> {
     pub fn unwrap_meta(self) -> Scalar<Prov> {
         match self {
@@ -56,9 +53,6 @@ pub struct MemPlace<Prov: Provenance = AllocId> {
     pub meta: MemPlaceMeta<Prov>,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(MemPlace, 40);
-
 /// A MemPlace with its layout. Constructing it is only possible in this module.
 #[derive(Copy, Clone, Hash, Eq, PartialEq, Debug)]
 pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
@@ -71,9 +65,6 @@ pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
     pub align: Align,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(MPlaceTy<'_>, 64);
-
 #[derive(Copy, Clone, Debug)]
 pub enum Place<Prov: Provenance = AllocId> {
     /// A place referring to a value allocated in the `Memory` system.
@@ -84,9 +75,6 @@ pub enum Place<Prov: Provenance = AllocId> {
     Local { frame: usize, local: mir::Local },
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(Place, 48);
-
 #[derive(Clone, Debug)]
 pub struct PlaceTy<'tcx, Prov: Provenance = AllocId> {
     place: Place<Prov>, // Keep this private; it helps enforce invariants.
@@ -98,9 +86,6 @@ pub struct PlaceTy<'tcx, Prov: Provenance = AllocId> {
     pub align: Align,
 }
 
-#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
-rustc_data_structures::static_assert_size!(PlaceTy<'_>, 72);
-
 impl<'tcx, Prov: Provenance> std::ops::Deref for PlaceTy<'tcx, Prov> {
     type Target = Place<Prov>;
     #[inline(always)]
@@ -901,3 +886,15 @@ where
         Ok(mplace)
     }
 }
+
+// Some nodes are used a lot. Make sure they don't unintentionally get bigger.
+#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
+mod size_asserts {
+    use super::*;
+    // These are in alphabetical order, which is easy to maintain.
+    rustc_data_structures::static_assert_size!(MemPlaceMeta, 24);
+    rustc_data_structures::static_assert_size!(MemPlace, 40);
+    rustc_data_structures::static_assert_size!(MPlaceTy<'_>, 64);
+    rustc_data_structures::static_assert_size!(Place, 48);
+    rustc_data_structures::static_assert_size!(PlaceTy<'_>, 72);
+}