[llvm] [DebugInfo] Move `codeview::SourceLanguage` enumerators to CodeViewLanguages.def (NFC) (PR #141750)

[Javier Lopez-Gomez via llvm-commits]

https://github.com/jalopezg-git created https://github.com/llvm/llvm-project/pull/141750

Per @CarlosAlbertoEnciso [comment](https://github.com/llvm/llvm-project/pull/137223#discussion_r2111062116), this change was split from its original PR [#137223](https://github.com/llvm/llvm-project/pull/137223).  In his own words,
> I think this is good change, but it should be done in another PR (before the current one) and get the feedback from the
> CodeView teams. In that way it would be a global benefit for other tools (including `llvm-debuginfo-analyzer`).

This PR proposes moving out enumerators for `codeview::SourceLanguage` to a separate CodeViewLanguages.def file, following the same guideline that in other parts of LLVM, and in particular the `TypeRecordKind` (enumerators in CodeViewTypes.def) or `SymbolRecordKind` (enumerators in CodeViewSymbols.def).

This is a non-functional change, and has been labeled as such.  This change helps for https://github.com/llvm/llvm-project/pull/137223, and possibly other future changes.

FYI, @CarlosAlbertoEnciso.

>From 69533254a1ad21a47926ff1a3a3338652eeadff1 Mon Sep 17 00:00:00 2001
From: Javier Lopez-Gomez <javier.lopez.gomez at proton.me>
Date: Wed, 28 May 2025 14:12:30 +0200
Subject: [PATCH] [DebugInfo] Move `codeview::SourceLanguage` enumerators to
 CodeViewLanguages.def (NFC)

---
 .../llvm/DebugInfo/CodeView/CodeView.h        | 32 +-----------
 .../DebugInfo/CodeView/CodeViewLanguages.def  | 51 +++++++++++++++++++
 2 files changed, 53 insertions(+), 30 deletions(-)
 create mode 100644 llvm/include/llvm/DebugInfo/CodeView/CodeViewLanguages.def

diff --git a/llvm/include/llvm/DebugInfo/CodeView/CodeView.h b/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
index 5cdff5ff0e82f..12d589db03b25 100644
--- a/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
+++ b/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
@@ -144,36 +144,8 @@ enum class CPUType : uint16_t {
 /// Debug Interface Access SDK, and are documented here:
 /// https://learn.microsoft.com/en-us/visualstudio/debugger/debug-interface-access/cv-cfl-lang
 enum SourceLanguage : uint8_t {
-  C = 0x00,
-  Cpp = 0x01,
-  Fortran = 0x02,
-  Masm = 0x03,
-  Pascal = 0x04,
-  Basic = 0x05,
-  Cobol = 0x06,
-  Link = 0x07,
-  Cvtres = 0x08,
-  Cvtpgd = 0x09,
-  CSharp = 0x0a,
-  VB = 0x0b,
-  ILAsm = 0x0c,
-  Java = 0x0d,
-  JScript = 0x0e,
-  MSIL = 0x0f,
-  HLSL = 0x10,
-  ObjC = 0x11,
-  ObjCpp = 0x12,
-  Swift = 0x13,
-  AliasObj = 0x14,
-  Rust = 0x15,
-  Go = 0x16,
-
-  /// The DMD compiler emits 'D' for the CV source language. Microsoft does not
-  /// have an enumerator for it yet.
-  D = 'D',
-  /// The Swift compiler used to emit 'S' for the CV source language, but
-  /// current versions emit the enumerator defined above.
-  OldSwift = 'S',
+#define CV_LANGUAGE(NAME, ID) NAME = ID,
+#include "CodeViewLanguages.def"
 };
 
 /// These values correspond to the CV_call_e enumeration, and are documented
diff --git a/llvm/include/llvm/DebugInfo/CodeView/CodeViewLanguages.def b/llvm/include/llvm/DebugInfo/CodeView/CodeViewLanguages.def
new file mode 100644
index 0000000000000..5c6335fffd4dd
--- /dev/null
+++ b/llvm/include/llvm/DebugInfo/CodeView/CodeViewLanguages.def
@@ -0,0 +1,51 @@
+//===-- CodeViewLanguages.def - All CodeView languages ----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// These values correspond to the CV_CFL_LANG enumeration in the Microsoft
+// Debug Interface Access SDK, and are documented here:
+// https://learn.microsoft.com/en-us/visualstudio/debugger/debug-interface-access/cv-cfl-lang
+// This should match the constants there.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CV_LANGUAGE
+#define CV_LANGUAGE(NAME, ID)
+#endif
+
+CV_LANGUAGE(C, 0x00)
+CV_LANGUAGE(Cpp, 0x01)
+CV_LANGUAGE(Fortran, 0x02)
+CV_LANGUAGE(Masm, 0x03)
+CV_LANGUAGE(Pascal, 0x04)
+CV_LANGUAGE(Basic, 0x05)
+CV_LANGUAGE(Cobol, 0x06)
+CV_LANGUAGE(Link, 0x07)
+CV_LANGUAGE(Cvtres, 0x08)
+CV_LANGUAGE(Cvtpgd, 0x09)
+CV_LANGUAGE(CSharp, 0x0a)
+CV_LANGUAGE(VB, 0x0b)
+CV_LANGUAGE(ILAsm, 0x0c)
+CV_LANGUAGE(Java, 0x0d)
+CV_LANGUAGE(JScript, 0x0e)
+CV_LANGUAGE(MSIL, 0x0f)
+CV_LANGUAGE(HLSL, 0x10)
+CV_LANGUAGE(ObjC, 0x11)
+CV_LANGUAGE(ObjCpp, 0x12)
+CV_LANGUAGE(Swift, 0x13)
+CV_LANGUAGE(AliasObj, 0x14)
+CV_LANGUAGE(Rust, 0x15)
+CV_LANGUAGE(Go, 0x16)
+
+// The DMD compiler emits 'D' for the CV source language. Microsoft does not
+// have an enumerator for it yet.
+CV_LANGUAGE(D, 'D')
+// The Swift compiler used to emit 'S' for the CV source language, but
+// current versions emit the enumerator defined above.
+CV_LANGUAGE(OldSwift, 'S')
+
+#undef CV_LANGUAGE