[llvm] 8b3eac0 - [DirectX] Convert DICompileUnit versioned language (#192574)

[via llvm-commits]

Author: Harald van Dijk
Date: 2026-04-24T09:00:40+01:00
New Revision: 8b3eac05aa742730a89889e90c375ad1f7359fe0

URL: https://github.com/llvm/llvm-project/commit/8b3eac05aa742730a89889e90c375ad1f7359fe0
DIFF: https://github.com/llvm/llvm-project/commit/8b3eac05aa742730a89889e90c375ad1f7359fe0.diff

LOG: [DirectX] Convert DICompileUnit versioned language (#192574)

Versioned languages did not exist in LLVM 3.7.

Added: 
    llvm/test/tools/dxil-dis/di-compile-unit-versioned-language.ll

Modified: 
    llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp b/llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp
index 9220a8b163aaf..8b75e3619cbff 100644
--- a/llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp
+++ b/llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp
@@ -14,6 +14,7 @@
 #include "DXILValueEnumerator.h"
 #include "DirectXIRPasses/PointerTypeAnalysis.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/BinaryFormat/Dwarf.h"
 #include "llvm/Bitcode/BitcodeCommon.h"
 #include "llvm/Bitcode/BitcodeReader.h"
 #include "llvm/Bitcode/LLVMBitCodes.h"
@@ -1516,7 +1517,13 @@ void DXILBitcodeWriter::writeDICompileUnit(const DICompileUnit *N,
                                            SmallVectorImpl<uint64_t> &Record,
                                            unsigned Abbrev) {
   Record.push_back(N->isDistinct());
-  Record.push_back(N->getSourceLanguage().getUnversionedName());
+  DISourceLanguageName Lang = N->getSourceLanguage();
+  if (Lang.hasVersionedName()) {
+    auto LangName = static_cast<dwarf::SourceLanguageName>(Lang.getName());
+    Lang = dwarf::toDW_LANG(LangName, Lang.getVersion())
+               .value_or(dwarf::SourceLanguage{});
+  }
+  Record.push_back(Lang.getUnversionedName());
   Record.push_back(VE.getMetadataOrNullID(N->getFile()));
   Record.push_back(VE.getMetadataOrNullID(N->getRawProducer()));
   Record.push_back(N->isOptimized());

diff  --git a/llvm/test/tools/dxil-dis/di-compile-unit-versioned-language.ll b/llvm/test/tools/dxil-dis/di-compile-unit-versioned-language.ll
new file mode 100644
index 0000000000000..42c469acfd810
--- /dev/null
+++ b/llvm/test/tools/dxil-dis/di-compile-unit-versioned-language.ll
@@ -0,0 +1,13 @@
+; RUN: llc --filetype=obj %s -o - | dxil-dis -o - | FileCheck %s
+
+target triple = "dxil-unknown-shadermodel6.3-library"
+
+;; CHECK: distinct !DICompileUnit(language: DW_LANG_C99,
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3}
+
+!0 = distinct !DICompileUnit(sourceLanguageName: DW_LNAME_C, sourceLanguageVersion: 199901, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
+!1 = !DIFile(filename: "versioned-language.c", directory: "")
+!2 = !{i32 7, !"Dwarf Version", i32 6}
+!3 = !{i32 2, !"Debug Info Version", i32 3}