Use WrappingRange::full instead of hand-rolling it

Author: oli-obk

compiler/rustc_codegen_gcc/src/consts.rs

@@ -328,7 +328,7 @@ pub fn const_alloc_to_gcc<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, alloc: ConstAl
                 interpret::Pointer::new(alloc_id, Size::from_bytes(ptr_offset)),
                 &cx.tcx,
             ),
-            abi::Scalar::Initialized { value: Primitive::Pointer, valid_range: WrappingRange { start: 0, end: !0 } },
+            abi::Scalar::Initialized { value: Primitive::Pointer, valid_range: WrappingRange::full(dl.pointer_size) },
             cx.type_i8p(),
         ));
         next_offset = offset + pointer_size;

compiler/rustc_codegen_llvm/src/consts.rs

@@ -111,7 +111,7 @@ pub fn const_alloc_to_llvm<'ll>(cx: &CodegenCx<'ll, '_>, alloc: ConstAllocation<
             ),
             Scalar::Initialized {
                 value: Primitive::Pointer,
-                valid_range: WrappingRange { start: 0, end: !0 },
+                valid_range: WrappingRange::full(dl.pointer_size),
             },
             cx.type_i8p_ext(address_space),
         ));

compiler/rustc_middle/src/ty/layout.rs

@@ -567,10 +567,7 @@ impl<'tcx> LayoutCx<'tcx, TyCtxt<'tcx>> {
         let scalar_unit = |value: Primitive| {
             let size = value.size(dl);
             assert!(size.bits() <= 128);
-            Scalar::Initialized {
-                value,
-                valid_range: WrappingRange { start: 0, end: size.unsigned_int_max() },
-            }
+            Scalar::Initialized { value, valid_range: WrappingRange::full(size) }
         };
         let scalar =
             |value: Primitive| tcx.intern_layout(LayoutS::scalar(self, scalar_unit(value)));