[clang] [Clang][TableGen] Add Features to TargetBuiltin (PR #80279)

[Wang Pengcheng via cfe-commits]

https://github.com/wangpc-pp created https://github.com/llvm/llvm-project/pull/80279

RISCV target will use this parameter, so we need a way to specify
it.


>From b0728e172ab9d6c139fc665b739d51af20a27bd2 Mon Sep 17 00:00:00 2001
From: Wang Pengcheng <wangpengcheng.pp at bytedance.com>
Date: Thu, 1 Feb 2024 19:47:46 +0800
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.4
---
 clang/include/clang/Basic/BuiltinsBase.td     | 4 +++-
 clang/utils/TableGen/ClangBuiltinsEmitter.cpp | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/clang/include/clang/Basic/BuiltinsBase.td b/clang/include/clang/Basic/BuiltinsBase.td
index b65b41be03265..bfccff5600ddb 100644
--- a/clang/include/clang/Basic/BuiltinsBase.td
+++ b/clang/include/clang/Basic/BuiltinsBase.td
@@ -87,7 +87,9 @@ class CustomEntry {
 }
 
 class AtomicBuiltin : Builtin;
-class TargetBuiltin : Builtin;
+class TargetBuiltin : Builtin {
+  string Features = "";
+}
 
 class LibBuiltin<string header, string languages = "ALL_LANGUAGES"> : Builtin {
   string Header = header;
diff --git a/clang/utils/TableGen/ClangBuiltinsEmitter.cpp b/clang/utils/TableGen/ClangBuiltinsEmitter.cpp
index dc10fa14c5959..48f55b8af97e4 100644
--- a/clang/utils/TableGen/ClangBuiltinsEmitter.cpp
+++ b/clang/utils/TableGen/ClangBuiltinsEmitter.cpp
@@ -219,7 +219,7 @@ void EmitBuiltinDef(llvm::raw_ostream &OS, StringRef Substitution,
     break;
   }
   case BuiltinType::TargetBuiltin:
-    OS << ", \"\"";
+    OS << ", \"" << Builtin->getValueAsString("Features") << "\"";
     break;
   case BuiltinType::AtomicBuiltin:
   case BuiltinType::Builtin: