Rollup merge of #101101 - RalfJung:read-pointer-as-bytes, r=oli-obk

interpret: make read-pointer-as-bytes a CTFE-only error with extra information

Next step in the reaction to https://github.com/rust-lang/rust/issues/99923. Also teaches Miri to implicitly strip provenance in more situations when transmuting pointers to integers, which fixes https://github.com/rust-lang/miri/issues/2456.

Pointer-to-int transmutation during CTFE now produces a message like this:
```
   = help: this code performed an operation that depends on the underlying bytes representing a pointer
   = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
```

r? ``@oli-obk``

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs
index 82ef16a7f72..5f5540495e9 100644
--- a/compiler/rustc_monomorphize/src/collector.rs
+++ b/compiler/rustc_monomorphize/src/collector.rs
@@ -461,7 +461,7 @@ fn collect_items_rec<'tcx>(
             recursion_depth_reset = None;
 
             if let Ok(alloc) = tcx.eval_static_initializer(def_id) {
-                for &id in alloc.inner().relocations().values() {
+                for &id in alloc.inner().provenance().values() {
                     collect_miri(tcx, id, &mut neighbors);
                 }
             }
@@ -1424,7 +1424,7 @@ fn collect_miri<'tcx>(tcx: TyCtxt<'tcx>, alloc_id: AllocId, output: &mut MonoIte
         }
         GlobalAlloc::Memory(alloc) => {
             trace!("collecting {:?} with {:#?}", alloc_id, alloc);
-            for &inner in alloc.inner().relocations().values() {
+            for &inner in alloc.inner().provenance().values() {
                 rustc_data_structures::stack::ensure_sufficient_stack(|| {
                     collect_miri(tcx, inner, output);
                 });
@@ -1463,7 +1463,7 @@ fn collect_const_value<'tcx>(
     match value {
         ConstValue::Scalar(Scalar::Ptr(ptr, _size)) => collect_miri(tcx, ptr.provenance, output),
         ConstValue::Slice { data: alloc, start: _, end: _ } | ConstValue::ByRef { alloc, .. } => {
-            for &id in alloc.inner().relocations().values() {
+            for &id in alloc.inner().provenance().values() {
                 collect_miri(tcx, id, output);
             }
         }