[llvm] [DWARFLinkerParallel] Add missing version string in producer (PR #158195)

[via llvm-commits]

https://github.com/shatyuka created https://github.com/llvm/llvm-project/pull/158195

Add missing LLVM version string to `DW_AT_producer` in `__artificial_type_unit`.

>From 9836f35682618ab5aed1ae0b8c59e9118ac02371 Mon Sep 17 00:00:00 2001
From: shatyuka <shatyuka at qq.com>
Date: Fri, 12 Sep 2025 12:52:27 +0800
Subject: [PATCH] [DWARFLinkerParallel] Add missing version string in producer

---
 llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp
index 07bbde70c77c4..534689e56851d 100644
--- a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp
+++ b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerTypeUnit.cpp
@@ -58,12 +58,11 @@ void TypeUnit::createDIETree(BumpPtrAllocator &Allocator) {
     uint64_t OutOffset = getDebugInfoHeaderSize();
     UnitDIE->setOffset(OutOffset);
 
-    SmallString<200> ProducerString;
-    ProducerString += "llvm DWARFLinkerParallel library version ";
+    const char *ProducerString =
+        "llvm DWARFLinkerParallel library version " LLVM_VERSION_STRING;
     DebugInfoSection.notePatchWithOffsetUpdate(
-        DebugStrPatch{
-            {OutOffset},
-            GlobalData.getStringPool().insert(ProducerString.str()).first},
+        DebugStrPatch{{OutOffset},
+                      GlobalData.getStringPool().insert(ProducerString).first},
         PatchesOffsets);
     OutOffset += DIETreeGenerator
                      .addStringPlaceholderAttribute(dwarf::DW_AT_producer,