From b633c4ee622df81d4572ef57dac54ebed69bb9bf Mon Sep 17 00:00:00 2001
From: Anders Carlsson <andersca@mac.com>
Date: Tue, 1 Sep 2009 20:37:18 +0000
Subject: [PATCH] Add a CK_FunctionToPointerDecay cast kind.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80719 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/AST/Expr.h | 3 +++
 lib/AST/StmtDumper.cpp   | 3 +++
 lib/Sema/SemaExpr.cpp    | 3 ++-
 lib/Sema/SemaExprCXX.cpp | 2 +-
 4 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index 793eb1edc6..750b72cbcf 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -1347,6 +1347,9 @@ public:
     /// CK_ArrayToPointerDecay - Array to pointer decay.
     CK_ArrayToPointerDecay,
     
+    // CK_FunctionToPointerDecay - Function to pointer decay.
+    CK_FunctionToPointerDecay,
+    
     /// CK_NullToMemberPointer - Null pointer to member pointer.
     CK_NullToMemberPointer,
     
diff --git a/lib/AST/StmtDumper.cpp b/lib/AST/StmtDumper.cpp
index 720188377d..7d8d64cb63 100644
--- a/lib/AST/StmtDumper.cpp
+++ b/lib/AST/StmtDumper.cpp
@@ -324,6 +324,9 @@ void StmtDumper::VisitCastExpr(CastExpr *Node) {
   case CastExpr::CK_ArrayToPointerDecay:
     fprintf(F, "<ArrayToPointerDecay>");
     break;
+  case CastExpr::CK_FunctionToPointerDecay:
+    fprintf(F, "<FunctionToPointerDecay>");
+    break;
   case CastExpr::CK_NullToMemberPointer:
     fprintf(F, "<NullToMemberPointer>");
     break;
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index d272be9765..c01097e363 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -196,7 +196,8 @@ void Sema::DefaultFunctionArrayConversion(Expr *&E) {
   assert(!Ty.isNull() && "DefaultFunctionArrayConversion - missing type");
 
   if (Ty->isFunctionType())
-    ImpCastExprToType(E, Context.getPointerType(Ty));
+    ImpCastExprToType(E, Context.getPointerType(Ty), 
+                      CastExpr::CK_FunctionToPointerDecay);
   else if (Ty->isArrayType()) {
     // In C90 mode, arrays only promote to pointers if the array expression is
     // an lvalue.  The relevant legalese is C90 6.2.2.1p3: "an lvalue that has
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 35938260c6..0dc4b8d180 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -1016,7 +1016,7 @@ Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
       FromType = From->getType();
     }
     FromType = Context.getPointerType(FromType);
-    ImpCastExprToType(From, FromType);
+    ImpCastExprToType(From, FromType, CastExpr::CK_FunctionToPointerDecay);
     break;
 
   default: