[clang] [llvm] KISHAN KUMAR S D, HRUTHIK K K , KIRAN V-R V COLLEGE OF ENGINEERING(CSE 6TH SEM)-Implement Clang identifiers to retrieve the mangled name and the fully qualified name of functions #5 (PR #145042)

KISHAN KUMAR S D via llvm-commits llvm-commits at lists.llvm.org
Fri Jun 20 10:24:41 PDT 2025 

https://github.com/kishan-kumar-s-d-444 updated https://github.com/llvm/llvm-project/pull/145042

>From fdf7f676690f7af5109970f239eba8f34850442f Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 19:35:57 +0530
Subject: [PATCH 1/6] Update Expr.h

---
 clang/include/clang/AST/Expr.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/AST/Expr.h b/clang/include/clang/AST/Expr.h
index 9fc23d30b733f..2da16d4dc069d 100644
--- a/clang/include/clang/AST/Expr.h
+++ b/clang/include/clang/AST/Expr.h
@@ -2003,7 +2003,9 @@ enum class PredefinedIdentKind {
   PrettyFunction,
   /// The same as PrettyFunction, except that the
   /// 'virtual' keyword is omitted for virtual member functions.
-  PrettyFunctionNoVirtual
+  PrettyFunctionNoVirtual,
+  FQFunction,
+  MangledFunction
 };
 
 /// [C99 6.4.2.2] - A predefined identifier such as __func__.

>From b814391bd581ab82acf30366ffd3952f3f72a490 Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 19:38:50 +0530
Subject: [PATCH 2/6] Update TokenKinds.def

---
 clang/include/clang/Basic/TokenKinds.def | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/include/clang/Basic/TokenKinds.def b/clang/include/clang/Basic/TokenKinds.def
index 94e72fea56a68..1f9f0d60e8b02 100644
--- a/clang/include/clang/Basic/TokenKinds.def
+++ b/clang/include/clang/Basic/TokenKinds.def
@@ -480,6 +480,9 @@ KEYWORD(__thread                    , KEYALL)
 KEYWORD(__FUNCTION__                , KEYALL)
 KEYWORD(__PRETTY_FUNCTION__         , KEYALL)
 KEYWORD(__auto_type                 , KEYALL)
+KEYWORD(__fq_func__, KEYALL)
+KEYWORD(__mangled_func__, KEYALL)
+
 
 // MS Extensions
 KEYWORD(__FUNCDNAME__               , KEYMS)

>From fe6fc7ba8183b267ee00fdc66c3060f1449194b2 Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 19:39:32 +0530
Subject: [PATCH 3/6] Update Expr.cpp

---
 clang/lib/AST/Expr.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index c3722c65abf6e..12b6745536d53 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -653,6 +653,10 @@ StringRef PredefinedExpr::getIdentKindName(PredefinedIdentKind IK) {
     return "__FUNCTION__";
   case PredefinedIdentKind::FuncDName:
     return "__FUNCDNAME__";
+  case PredefinedIdentKind::FQFunction:
+    return "__fq_func__";
+  case PredefinedIdentKind::MangledFunction:
+    return "__mangled_func__";
   case PredefinedIdentKind::LFunction:
     return "L__FUNCTION__";
   case PredefinedIdentKind::PrettyFunction:
@@ -674,6 +678,34 @@ std::string PredefinedExpr::ComputeName(PredefinedIdentKind IK,
                                         bool ForceElaboratedPrinting) {
   ASTContext &Context = CurrentDecl->getASTContext();
 
+  if (IK == PredefinedIdentKind::FQFunction) {
+  if (const auto *ND = dyn_cast<NamedDecl>(CurrentDecl))
+    return ND->getQualifiedNameAsString();
+  return "<unknown>";
+}
+
+if (IK == PredefinedIdentKind::MangledFunction) {
+  if (const auto *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
+    std::unique_ptr<MangleContext> MC;
+    MC.reset(Context.createMangleContext());
+    SmallString<256> Buffer;
+    llvm::raw_svector_ostream Out(Buffer);
+    GlobalDecl GD;
+    if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
+      GD = GlobalDecl(CD, Ctor_Base);
+    else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
+      GD = GlobalDecl(DD, Dtor_Base);
+    else if (auto FD = dyn_cast<FunctionDecl>(ND)) {
+      GD = FD->isReferenceableKernel() ? GlobalDecl(FD) : GlobalDecl(ND);
+    } else
+      GD = GlobalDecl(ND);
+    MC->mangleName(GD, Out);
+    return std::string(Buffer);
+  }
+  return "<unknown>";
+}
+
+                                          
   if (IK == PredefinedIdentKind::FuncDName) {
     if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
       std::unique_ptr<MangleContext> MC;

>From add48ac76f28fa94ff4aed30116722a2b24799fb Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 19:40:35 +0530
Subject: [PATCH 4/6] Update SemaExpr.cpp

---
 clang/lib/Sema/SemaExpr.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 413eff4aa294a..2e5cd6a821c70 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -1992,6 +1992,10 @@ static PredefinedIdentKind getPredefinedExprKind(tok::TokenKind Kind) {
     llvm_unreachable("unexpected TokenKind");
   case tok::kw___func__:
     return PredefinedIdentKind::Func; // [C99 6.4.2.2]
+  case tok::kw___fq_func__:
+    return PredefinedIdentKind::FQFunction;
+  case tok::kw___mangled_func__:
+    return PredefinedIdentKind::MangledFunction;
   case tok::kw___FUNCTION__:
     return PredefinedIdentKind::Function;
   case tok::kw___FUNCDNAME__:

>From f5847a1c5a93bb0e70eae2e211abe50a1cd3677d Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 19:41:40 +0530
Subject: [PATCH 5/6] Update ParseExpr.cpp

---
 clang/lib/Parse/ParseExpr.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 3cf3d4ea7d705..afd28da1e2bc4 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -1042,6 +1042,8 @@ ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
   case tok::kw_L__FUNCTION__:   // primary-expression: L__FUNCTION__ [MS]
   case tok::kw_L__FUNCSIG__:    // primary-expression: L__FUNCSIG__ [MS]
   case tok::kw___PRETTY_FUNCTION__:  // primary-expression: __P..Y_F..N__ [GNU]
+  case tok::kw___fq_func__:           // <-- Add this line
+  case tok::kw___mangled_func__: 
     // Function local predefined macros are represented by PredefinedExpr except
     // when Microsoft extensions are enabled and one of these macros is adjacent
     // to a string literal or another one of these macros.

>From 828383153d068d229b463fedf54c0df2915e35bc Mon Sep 17 00:00:00 2001
From: KISHAN KUMAR S D <kishankumarsd444 at gmail.com>
Date: Fri, 20 Jun 2025 22:54:29 +0530
Subject: [PATCH 6/6] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index a9b29ecbc1a3a..897840e92feec 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # The LLVM Compiler Infrastructure
-
+//Changed//
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/llvm/llvm-project/badge)](https://securityscorecards.dev/viewer/?uri=github.com/llvm/llvm-project)
 [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/8273/badge)](https://www.bestpractices.dev/projects/8273)
 [![libc++](https://github.com/llvm/llvm-project/actions/workflows/libcxx-build-and-test.yaml/badge.svg?branch=main&event=schedule)](https://github.com/llvm/llvm-project/actions/workflows/libcxx-build-and-test.yaml?query=event%3Aschedule)

More information about the llvm-commits mailing list