Remove rustc_layout_scalar_valid_range attr from debuginfo

Author: oli-obk

tests/debuginfo/msvc-pretty-enums.rs

@@ -232,7 +232,7 @@
 
 //@ cdb-command: dx c_style_i128_d
 //@ cdb-check: c_style_i128_d   : D [Type: enum2$<msvc_pretty_enums::CStyleI128>]
-#![feature(rustc_attrs)]
+#![feature(pattern_types, pattern_type_macro)]
 
 use std::num::NonZero;
 
@@ -270,10 +270,10 @@ enum NicheLayoutWithFields3 {
     F,
 }
 
-#[rustc_layout_scalar_valid_range_start(340282366920938463463374607431768211454)]
-#[rustc_layout_scalar_valid_range_end(1)]
 #[repr(transparent)]
-struct Wrapping128(u128);
+struct Wrapping128(
+    std::pat::pattern_type!(i128 is -2..=1),
+);
 
 enum Wrapping128Niche {
     X(Wrapping128),
@@ -325,8 +325,9 @@ fn main() {
     let niche128_some = NonZero::new(123456i128);
     let niche128_none: Option<NonZero<i128>> = None;
 
-    let wrapping_niche128_untagged =
-        unsafe { Wrapping128Niche::X(Wrapping128(340282366920938463463374607431768211454)) };
+    let wrapping_niche128_untagged = Wrapping128Niche::X(Wrapping128(unsafe {
+        std::mem::transmute(340282366920938463463374607431768211454_u128)
+    }));
     let wrapping_niche128_none1 = Wrapping128Niche::Y;
     let wrapping_niche128_none2 = Wrapping128Niche::Z;