From 9daa026cadca6de0d932ddb6f6ddbfa5411a25e3 Mon Sep 17 00:00:00 2001
From: Zalathar <Zalathar@users.noreply.github.com>
Date: Fri, 19 Sep 2025 16:56:28 +1000
Subject: Use `LLVMDIBuilder(CreateExpression|InsertDeclareRecordAtEnd)`

---
 compiler/rustc_codegen_llvm/src/debuginfo/mod.rs | 15 +++++++------
 compiler/rustc_codegen_llvm/src/llvm/ffi.rs      | 27 +++++++++++++++---------
 2 files changed, 26 insertions(+), 16 deletions(-)

(limited to 'compiler/rustc_codegen_llvm')

diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
index 126082aa3aa..dc36ed17875 100644
--- a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
+++ b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs
@@ -191,18 +191,21 @@ impl<'ll> DebugInfoBuilderMethods for Builder<'_, 'll, '_> {
             addr_ops.push((fragment.end - fragment.start).bits() as u64);
         }
 
+        let di_builder = DIB(self.cx());
+        let addr_expr = unsafe {
+            llvm::LLVMDIBuilderCreateExpression(di_builder, addr_ops.as_ptr(), addr_ops.len())
+        };
         unsafe {
             // FIXME(eddyb) replace `llvm.dbg.declare` with `llvm.dbg.addr`.
-            llvm::LLVMRustDIBuilderInsertDeclareAtEnd(
-                DIB(self.cx()),
+            llvm::LLVMDIBuilderInsertDeclareRecordAtEnd(
+                di_builder,
                 variable_alloca,
                 dbg_var,
-                addr_ops.as_ptr(),
-                addr_ops.len() as c_uint,
+                addr_expr,
                 dbg_loc,
                 self.llbb(),
-            );
-        }
+            )
+        };
     }
 
     fn set_dbg_loc(&mut self, dbg_loc: &'ll DILocation) {
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 290dbda77f6..11de4ed9653 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -806,6 +806,8 @@ unsafe extern "C" {
     pub(crate) type Metadata;
     pub(crate) type BasicBlock;
     pub(crate) type Comdat;
+    /// `&'ll DbgRecord` represents `LLVMDbgRecordRef`.
+    pub(crate) type DbgRecord;
 }
 #[repr(C)]
 pub(crate) struct Builder<'a>(InvariantOpaque<'a>);
@@ -2000,6 +2002,21 @@ unsafe extern "C" {
         Data: *const Option<&'ll Metadata>,
         NumElements: size_t,
     ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderCreateExpression<'ll>(
+        Builder: &DIBuilder<'ll>,
+        Addr: *const u64,
+        Length: size_t,
+    ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderInsertDeclareRecordAtEnd<'ll>(
+        Builder: &DIBuilder<'ll>,
+        Storage: &'ll Value,
+        VarInfo: &'ll Metadata,
+        Expr: &'ll Metadata,
+        DebugLoc: &'ll Metadata,
+        Block: &'ll BasicBlock,
+    ) -> &'ll DbgRecord;
 }
 
 #[link(name = "llvm-wrapper", kind = "static")]
@@ -2381,16 +2398,6 @@ unsafe extern "C" {
         AlignInBits: u32,
     ) -> &'a DIVariable;
 
-    pub(crate) fn LLVMRustDIBuilderInsertDeclareAtEnd<'a>(
-        Builder: &DIBuilder<'a>,
-        Val: &'a Value,
-        VarInfo: &'a DIVariable,
-        AddrOps: *const u64,
-        AddrOpsCount: c_uint,
-        DL: &'a DILocation,
-        InsertAtEnd: &'a BasicBlock,
-    );
-
     pub(crate) fn LLVMRustDIBuilderCreateEnumerator<'a>(
         Builder: &DIBuilder<'a>,
         Name: *const c_char,
-- 
cgit 1.4.1-3-g733a5