Require type_map::stub callers to supply file information

This change attaches file information (`DIFile` reference and line
number) to struct debug info nodes.

Before:

```
; foo.ll
...
!5 = !DIFile(filename: "<unknown>", directory: "")
...
!16 = !DICompositeType(tag: DW_TAG_structure_type, name: "MyType", scope: !2, file: !5, size: 32, align: 32, elements: !17, templateParams: !19, identifier: "4cb373851db92e732c4cb5651b886dd0")
...
```

After:

```
; foo.ll
...
!3 = !DIFile(filename: "foo.rs", directory: "/home/matt/src/rust98678", checksumkind: CSK_SHA1, checksum: "bcb9f08512c8f3b8181ef4726012bc6807bc9be4")
...
!16 = !DICompositeType(tag: DW_TAG_structure_type, name: "MyType", scope: !2, file: !3, line: 3, size: 32, align: 32, elements: !17, templateParams: !19, identifier: "9e5968c7af39c148acb253912b7f409f")
...
```

Fixes #98678

Author: mweber15

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -213,6 +213,8 @@ fn build_pointer_or_reference_di_node<'ll, 'tcx>(
                     Stub::Struct,
                     unique_type_id,
                     &ptr_type_debuginfo_name,
+                    unknown_file_metadata(cx),
+                    UNKNOWN_LINE_NUMBER,
                     cx.size_and_align_of(ptr_type),
                     NO_SCOPE_METADATA,
                     DIFlags::FlagZero,
@@ -367,6 +369,8 @@ fn build_dyn_type_di_node<'ll, 'tcx>(
                 Stub::Struct,
                 unique_type_id,
                 &type_name,
+                unknown_file_metadata(cx),
+                UNKNOWN_LINE_NUMBER,
                 cx.size_and_align_of(dyn_type),
                 NO_SCOPE_METADATA,
                 DIFlags::FlagZero,
@@ -748,6 +752,8 @@ fn build_foreign_type_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &compute_debuginfo_type_name(cx.tcx, t, false),
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             cx.size_and_align_of(t),
             Some(get_namespace_for_item(cx, def_id)),
             DIFlags::FlagZero,
@@ -978,13 +984,24 @@ fn build_struct_type_di_node<'ll, 'tcx>(
     let struct_type_and_layout = cx.layout_of(struct_type);
     let variant_def = adt_def.non_enum_variant();
 
+    let tcx = cx.tcx;
+    let struct_span = tcx.def_span(adt_def.did());
+    let (file_metadata, line_number) = if !struct_span.is_dummy() {
+        let loc = cx.lookup_debug_loc(struct_span.lo());
+        (file_metadata(cx, &loc.file), loc.line)
+    } else {
+        (unknown_file_metadata(cx), UNKNOWN_LINE_NUMBER)
+    };
+
     type_map::build_type_with_children(
         cx,
         type_map::stub(
             cx,
             Stub::Struct,
             unique_type_id,
             &compute_debuginfo_type_name(cx.tcx, struct_type, false),
+            file_metadata,
+            line_number,
             size_and_align_of(struct_type_and_layout),
             Some(containing_scope),
             DIFlags::FlagZero,
@@ -1095,6 +1112,8 @@ fn build_tuple_type_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(tuple_type_and_layout),
             NO_SCOPE_METADATA,
             DIFlags::FlagZero,
@@ -1140,6 +1159,8 @@ fn build_closure_env_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             cx.size_and_align_of(closure_env_type),
             Some(containing_scope),
             DIFlags::FlagZero,
@@ -1171,6 +1192,8 @@ fn build_union_type_di_node<'ll, 'tcx>(
             Stub::Union,
             unique_type_id,
             &type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(union_ty_and_layout),
             Some(containing_scope),
             DIFlags::FlagZero,
@@ -1356,6 +1379,8 @@ fn build_vtable_type_di_node<'ll, 'tcx>(
             Stub::VTableTy { vtable_holder },
             unique_type_id,
             &vtable_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             (size, pointer_align),
             NO_SCOPE_METADATA,
             DIFlags::FlagArtificial,

compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/cpp_like.rs

@@ -213,6 +213,8 @@ pub(super) fn build_enum_type_di_node<'ll, 'tcx>(
             type_map::Stub::Union,
             unique_type_id,
             &enum_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             cx.size_and_align_of(enum_type),
             NO_SCOPE_METADATA,
             DIFlags::FlagZero,
@@ -288,6 +290,8 @@ pub(super) fn build_generator_di_node<'ll, 'tcx>(
             type_map::Stub::Union,
             unique_type_id,
             &generator_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(generator_type_and_layout),
             NO_SCOPE_METADATA,
             DIFlags::FlagZero,
@@ -490,6 +494,8 @@ fn build_variant_struct_wrapper_type_di_node<'ll, 'tcx>(
                 variant_index,
             ),
             &variant_struct_wrapper_type_name(variant_index),
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             // NOTE: We use size and align of enum_type, not from variant_layout:
             size_and_align_of(enum_or_generator_type_and_layout),
             Some(enum_or_generator_type_di_node),

compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/mod.rs

@@ -261,6 +261,8 @@ fn build_enum_variant_struct_type_di_node<'ll, 'tcx>(
                 variant_index,
             ),
             variant_def.name.as_str(),
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             // NOTE: We use size and align of enum_type, not from variant_layout:
             size_and_align_of(enum_type_and_layout),
             Some(enum_type_di_node),
@@ -343,6 +345,8 @@ pub fn build_generator_variant_struct_type_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &variant_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(generator_type_and_layout),
             Some(generator_type_di_node),
             DIFlags::FlagZero,

compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/native.rs

@@ -72,6 +72,8 @@ pub(super) fn build_enum_type_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &enum_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(enum_type_and_layout),
             Some(containing_scope),
             DIFlags::FlagZero,
@@ -150,6 +152,8 @@ pub(super) fn build_generator_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &generator_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(generator_type_and_layout),
             Some(containing_scope),
             DIFlags::FlagZero,

compiler/rustc_codegen_llvm/src/debuginfo/metadata/type_map.rs

@@ -16,11 +16,11 @@ use crate::{
     debuginfo::utils::{create_DIArray, debug_context, DIB},
     llvm::{
         self,
-        debuginfo::{DIFlags, DIScope, DIType},
+        debuginfo::{DIFile, DIFlags, DIScope, DIType},
     },
 };
 
-use super::{unknown_file_metadata, SmallVec, UNKNOWN_LINE_NUMBER};
+use super::SmallVec;
 
 mod private {
     // This type cannot be constructed outside of this module because
@@ -183,6 +183,8 @@ pub(super) fn stub<'ll, 'tcx>(
     kind: Stub<'ll>,
     unique_type_id: UniqueTypeId<'tcx>,
     name: &str,
+    file_metadata: &'ll DIFile,
+    line_number: u32,
     (size, align): (Size, Align),
     containing_scope: Option<&'ll DIScope>,
     flags: DIFlags,
@@ -202,8 +204,8 @@ pub(super) fn stub<'ll, 'tcx>(
                     containing_scope,
                     name.as_ptr().cast(),
                     name.len(),
-                    unknown_file_metadata(cx),
-                    UNKNOWN_LINE_NUMBER,
+                    file_metadata,
+                    line_number,
                     size.bits(),
                     align.bits() as u32,
                     flags,
@@ -222,8 +224,8 @@ pub(super) fn stub<'ll, 'tcx>(
                 containing_scope,
                 name.as_ptr().cast(),
                 name.len(),
-                unknown_file_metadata(cx),
-                UNKNOWN_LINE_NUMBER,
+                file_metadata,
+                line_number,
                 size.bits(),
                 align.bits() as u32,
                 flags,