From 0f9c09fb3a64ff11ea81446a96907cd5e86490c2 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Mon, 3 Mar 2025 12:43:05 +0000
Subject: [PATCH] Remoe has_ptr_meta in favor of tcx.type_has_metadata()

---
 src/base.rs            |  6 ++++--
 src/common.rs          | 18 ++----------------
 src/debuginfo/types.rs |  4 ++--
 src/num.rs             |  8 ++++++--
 src/value_and_place.rs |  6 +++---
 5 files changed, 17 insertions(+), 25 deletions(-)

diff --git a/src/base.rs b/src/base.rs
index 125a9201831c..adaa754491e5 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -729,8 +729,10 @@ fn codegen_stmt<'tcx>(
                     let to_ty = fx.monomorphize(to_ty);
 
                     fn is_wide_ptr<'tcx>(fx: &FunctionCx<'_, '_, 'tcx>, ty: Ty<'tcx>) -> bool {
-                        ty.builtin_deref(true)
-                            .is_some_and(|pointee_ty| has_ptr_meta(fx.tcx, pointee_ty))
+                        ty.builtin_deref(true).is_some_and(|pointee_ty| {
+                            fx.tcx
+                                .type_has_metadata(pointee_ty, ty::TypingEnv::fully_monomorphized())
+                        })
                     }
 
                     if is_wide_ptr(fx, from_ty) {
diff --git a/src/common.rs b/src/common.rs
index 766278d87183..abe2972ba0cb 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -71,7 +71,7 @@ fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Typ
         },
         ty::FnPtr(..) => pointer_ty(tcx),
         ty::RawPtr(pointee_ty, _) | ty::Ref(_, pointee_ty, _) => {
-            if has_ptr_meta(tcx, *pointee_ty) {
+            if tcx.type_has_metadata(*pointee_ty, ty::TypingEnv::fully_monomorphized()) {
                 return None;
             } else {
                 pointer_ty(tcx)
@@ -91,7 +91,7 @@ fn clif_pair_type_from_ty<'tcx>(
             (clif_type_from_ty(tcx, types[0])?, clif_type_from_ty(tcx, types[1])?)
         }
         ty::RawPtr(pointee_ty, _) | ty::Ref(_, pointee_ty, _) => {
-            if has_ptr_meta(tcx, *pointee_ty) {
+            if tcx.type_has_metadata(*pointee_ty, ty::TypingEnv::fully_monomorphized()) {
                 (pointer_ty(tcx), pointer_ty(tcx))
             } else {
                 return None;
@@ -101,20 +101,6 @@ fn clif_pair_type_from_ty<'tcx>(
     })
 }
 
-/// Is a pointer to this type a wide ptr?
-pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
-    if ty.is_sized(tcx, ty::TypingEnv::fully_monomorphized()) {
-        return false;
-    }
-
-    let tail = tcx.struct_tail_for_codegen(ty, ty::TypingEnv::fully_monomorphized());
-    match tail.kind() {
-        ty::Foreign(..) => false,
-        ty::Str | ty::Slice(..) | ty::Dynamic(..) => true,
-        _ => bug!("unexpected unsized tail: {:?}", tail),
-    }
-}
-
 pub(crate) fn codegen_icmp_imm(
     fx: &mut FunctionCx<'_, '_, '_>,
     intcc: IntCC,
diff --git a/src/debuginfo/types.rs b/src/debuginfo/types.rs
index 017d7784dc03..25b922c8be4c 100644
--- a/src/debuginfo/types.rs
+++ b/src/debuginfo/types.rs
@@ -6,7 +6,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_middle::ty::layout::LayoutOf;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 
-use crate::{DebugContext, FullyMonomorphizedLayoutCx, has_ptr_meta};
+use crate::{DebugContext, FullyMonomorphizedLayoutCx};
 
 #[derive(Default)]
 pub(crate) struct TypeDebugContext<'tcx> {
@@ -129,7 +129,7 @@ impl DebugContext {
 
         let name = type_names::compute_debuginfo_type_name(tcx, ptr_type, true);
 
-        if !has_ptr_meta(tcx, ptr_type) {
+        if !tcx.type_has_metadata(ptr_type, ty::TypingEnv::fully_monomorphized()) {
             let pointer_type_id =
                 self.dwarf.unit.add(self.dwarf.unit.root(), gimli::DW_TAG_pointer_type);
             let pointer_entry = self.dwarf.unit.get_mut(pointer_type_id);
diff --git a/src/num.rs b/src/num.rs
index f44e2459a784..2a4d1e3ae571 100644
--- a/src/num.rs
+++ b/src/num.rs
@@ -395,8 +395,12 @@ pub(crate) fn codegen_ptr_binop<'tcx>(
     in_lhs: CValue<'tcx>,
     in_rhs: CValue<'tcx>,
 ) -> CValue<'tcx> {
-    let is_thin_ptr =
-        in_lhs.layout().ty.builtin_deref(true).map(|ty| !has_ptr_meta(fx.tcx, ty)).unwrap_or(true);
+    let is_thin_ptr = in_lhs
+        .layout()
+        .ty
+        .builtin_deref(true)
+        .map(|ty| !fx.tcx.type_has_metadata(ty, ty::TypingEnv::fully_monomorphized()))
+        .unwrap_or(true);
 
     if is_thin_ptr {
         match bin_op {
diff --git a/src/value_and_place.rs b/src/value_and_place.rs
index cc739fefcd06..f8a19589fdd7 100644
--- a/src/value_and_place.rs
+++ b/src/value_and_place.rs
@@ -746,7 +746,7 @@ impl<'tcx> CPlace<'tcx> {
         };
 
         let (field_ptr, field_layout) = codegen_field(fx, base, extra, layout, field);
-        if has_ptr_meta(fx.tcx, field_layout.ty) {
+        if fx.tcx.type_has_metadata(field_layout.ty, ty::TypingEnv::fully_monomorphized()) {
             CPlace::for_ptr_with_extra(field_ptr, extra.unwrap(), field_layout)
         } else {
             CPlace::for_ptr(field_ptr, field_layout)
@@ -832,7 +832,7 @@ impl<'tcx> CPlace<'tcx> {
 
     pub(crate) fn place_deref(self, fx: &mut FunctionCx<'_, '_, 'tcx>) -> CPlace<'tcx> {
         let inner_layout = fx.layout_of(self.layout().ty.builtin_deref(true).unwrap());
-        if has_ptr_meta(fx.tcx, inner_layout.ty) {
+        if fx.tcx.type_has_metadata(inner_layout.ty, ty::TypingEnv::fully_monomorphized()) {
             let (addr, extra) = self.to_cvalue(fx).load_scalar_pair(fx);
             CPlace::for_ptr_with_extra(Pointer::new(addr), extra, inner_layout)
         } else {
@@ -845,7 +845,7 @@ impl<'tcx> CPlace<'tcx> {
         fx: &mut FunctionCx<'_, '_, 'tcx>,
         layout: TyAndLayout<'tcx>,
     ) -> CValue<'tcx> {
-        if has_ptr_meta(fx.tcx, self.layout().ty) {
+        if fx.tcx.type_has_metadata(self.layout().ty, ty::TypingEnv::fully_monomorphized()) {
             let (ptr, extra) = self.to_ptr_unsized();
             CValue::by_val_pair(ptr.get_addr(fx), extra, layout)
         } else {