Create a safe wrapper around LLVMRustDIBuilderCreateTemplateTypeParameter

Author: oli-obk

Diff for: compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -1297,16 +1297,7 @@ fn build_generic_type_param_di_nodes<'ll, 'tcx>(
                     kind.as_type().map(|ty| {
                         let actual_type = cx.tcx.normalize_erasing_regions(cx.typing_env(), ty);
                         let actual_type_di_node = type_di_node(cx, actual_type);
-                        let name = name.as_str();
-                        unsafe {
-                            llvm::LLVMRustDIBuilderCreateTemplateTypeParameter(
-                                DIB(cx),
-                                None,
-                                name.as_c_char_ptr(),
-                                name.len(),
-                                actual_type_di_node,
-                            )
-                        }
+                        cx.create_template_type_parameter(name.as_str(), actual_type_di_node)
                     })
                 })
                 .collect();

Diff for: compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -34,8 +34,8 @@ use crate::builder::Builder;
 use crate::common::{AsCCharPtr, CodegenCx};
 use crate::llvm;
 use crate::llvm::debuginfo::{
-    DIArray, DIBuilderBox, DIFile, DIFlags, DILexicalBlock, DILocation, DISPFlags, DIScope, DIType,
-    DIVariable,
+    DIArray, DIBuilderBox, DIFile, DIFlags, DILexicalBlock, DILocation, DISPFlags, DIScope,
+    DITemplateTypeParameter, DIType, DIVariable,
 };
 use crate::value::Value;
 
@@ -251,7 +251,7 @@ struct DebugLoc {
     col: u32,
 }
 
-impl CodegenCx<'_, '_> {
+impl<'ll> CodegenCx<'ll, '_> {
     /// Looks up debug source information about a `BytePos`.
     // FIXME(eddyb) rename this to better indicate it's a duplicate of
     // `lookup_char_pos` rather than `dbg_loc`, perhaps by making
@@ -279,6 +279,22 @@ impl CodegenCx<'_, '_> {
             DebugLoc { file, line, col }
         }
     }
+
+    fn create_template_type_parameter(
+        &self,
+        name: &str,
+        actual_type_metadata: &'ll DIType,
+    ) -> &'ll DITemplateTypeParameter {
+        unsafe {
+            llvm::LLVMRustDIBuilderCreateTemplateTypeParameter(
+                DIB(self),
+                None,
+                name.as_c_char_ptr(),
+                name.len(),
+                actual_type_metadata,
+            )
+        }
+    }
 }
 
 impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
@@ -483,16 +499,10 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                         kind.as_type().map(|ty| {
                             let actual_type = cx.tcx.normalize_erasing_regions(cx.typing_env(), ty);
                             let actual_type_metadata = type_di_node(cx, actual_type);
-                            let name = name.as_str();
-                            unsafe {
-                                Some(llvm::LLVMRustDIBuilderCreateTemplateTypeParameter(
-                                    DIB(cx),
-                                    None,
-                                    name.as_c_char_ptr(),
-                                    name.len(),
-                                    actual_type_metadata,
-                                ))
-                            }
+                            Some(cx.create_template_type_parameter(
+                                name.as_str(),
+                                actual_type_metadata,
+                            ))
                         })
                     })
                     .collect()