Rollup merge of #122935 - RalfJung:with-exposed-provenance, r=Amanieu

rename ptr::from_exposed_addr -> ptr::with_exposed_provenance

As discussed on [Zulip](https://rust-lang.zulipchat.com/#narrow/stream/136281-t-opsem/topic/To.20expose.20or.20not.20to.20expose/near/427757066).

The old name, `from_exposed_addr`, makes little sense as it's not the address that is exposed, it's the provenance. (`ptr.expose_addr()` stays unchanged as we haven't found a better option yet. The intended interpretation is "expose the provenance and return the address".)

The new name nicely matches `ptr::without_provenance`.

Author: jhpratt

src/base.rs

@@ -650,7 +650,7 @@ fn codegen_stmt<'tcx>(
                     | CastKind::FnPtrToPtr
                     | CastKind::PtrToPtr
                     | CastKind::PointerExposeAddress
-                    | CastKind::PointerFromExposedAddress,
+                    | CastKind::PointerWithExposedProvenance,
                     ref operand,
                     to_ty,
                 ) => {

src/intrinsics/simd.rs

@@ -965,7 +965,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
             });
         }
 
-        sym::simd_expose_addr | sym::simd_from_exposed_addr | sym::simd_cast_ptr => {
+        sym::simd_expose_addr | sym::simd_with_exposed_provenance | sym::simd_cast_ptr => {
             intrinsic_args!(fx, args => (arg); intrinsic);
             ret.write_cvalue_transmute(fx, arg);
         }