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 rust-lang#98678

Author: mweber15

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -204,6 +204,8 @@ 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,
@@ -371,6 +373,8 @@ 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,
@@ -841,6 +845,8 @@ 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,
@@ -1044,13 +1050,24 @@ 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),
             visibility_di_flags(cx, adt_def.did(), adt_def.did()),
@@ -1154,6 +1171,8 @@ 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,
@@ -1200,6 +1219,8 @@ 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,
@@ -1231,6 +1252,8 @@ 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,
@@ -1423,6 +1446,8 @@ 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

@@ -199,6 +199,8 @@ 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,
             visibility_di_flags(cx, enum_adt_def.did(), enum_adt_def.did()),
@@ -274,6 +276,8 @@ pub(super) fn build_coroutine_di_node<'ll, 'tcx>(
             type_map::Stub::Union,
             unique_type_id,
             &coroutine_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(coroutine_type_and_layout),
             NO_SCOPE_METADATA,
             DIFlags::FlagZero,
@@ -481,6 +485,8 @@ 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_coroutine_type_and_layout),
             Some(enum_or_coroutine_type_di_node),

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

@@ -204,6 +204,8 @@ 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),
@@ -286,6 +288,8 @@ fn build_coroutine_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(coroutine_type_and_layout),
             Some(coroutine_type_di_node),
             DIFlags::FlagZero,
@@ -351,7 +355,11 @@ enum DiscrResult {
 
 impl DiscrResult {
     fn opt_single_val(&self) -> Option<u128> {
-        if let Self::Value(d) = *self { Some(d) } else { None }
+        if let Self::Value(d) = *self {
+            Some(d)
+        } else {
+            None
+        }
     }
 }
 

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

@@ -62,6 +62,8 @@ 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),
             visibility_flags,
@@ -141,6 +143,8 @@ pub(super) fn build_coroutine_di_node<'ll, 'tcx>(
             Stub::Struct,
             unique_type_id,
             &coroutine_type_name,
+            unknown_file_metadata(cx),
+            UNKNOWN_LINE_NUMBER,
             size_and_align_of(coroutine_type_and_layout),
             Some(containing_scope),
             DIFlags::FlagZero,

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

@@ -11,7 +11,7 @@ use rustc_middle::ty::{ParamEnv, PolyExistentialTraitRef, Ty, TyCtxt};
 use super::{SmallVec, UNKNOWN_LINE_NUMBER, unknown_file_metadata};
 use crate::common::{AsCCharPtr, CodegenCx};
 use crate::debuginfo::utils::{DIB, create_DIArray, debug_context};
-use crate::llvm::debuginfo::{DIFlags, DIScope, DIType};
+use crate::llvm::debuginfo::{DIFile, DIFlags, DIScope, DIType};
 use crate::llvm::{self};
 
 mod private {
@@ -174,6 +174,8 @@ 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,
@@ -193,8 +195,8 @@ pub(super) fn stub<'ll, 'tcx>(
                     containing_scope,
                     name.as_c_char_ptr(),
                     name.len(),
-                    unknown_file_metadata(cx),
-                    UNKNOWN_LINE_NUMBER,
+                    file_metadata,
+                    line_number,
                     size.bits(),
                     align.bits() as u32,
                     flags,
@@ -213,8 +215,8 @@ pub(super) fn stub<'ll, 'tcx>(
                 containing_scope,
                 name.as_c_char_ptr(),
                 name.len(),
-                unknown_file_metadata(cx),
-                UNKNOWN_LINE_NUMBER,
+                file_metadata,
+                line_number,
                 size.bits(),
                 align.bits() as u32,
                 flags,