add the ability to get the llvm function corresponding to a library builtin.

llvm-svn: 41633

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/CodeGen/CodeGenModule.h b/clang/CodeGen/CodeGenModule.h
index 97d6a02f47f..af2db808400 100644
--- a/clang/CodeGen/CodeGenModule.h
+++ b/clang/CodeGen/CodeGenModule.h
@@ -44,6 +44,8 @@ class CodeGenModule {
   
   llvm::StringMap<llvm::Constant*> CFConstantStringMap;
   llvm::Constant *CFConstantStringClassRef;
+  
+  std::vector<llvm::Function *> BuiltinFunctions;
 public:
   CodeGenModule(ASTContext &C, llvm::Module &M);
   
@@ -52,9 +54,15 @@ public:
   CodeGenTypes &getTypes() { return Types; }
   
   llvm::Constant *GetAddrOfGlobalDecl(const Decl *D);
+  
+  /// getBuiltinLibFunction - Given a builtin id for a function like
+  /// "__builtin_fabsf", return a Function* for "fabsf".
+  ///
+  llvm::Function *getBuiltinLibFunction(unsigned BuiltinID);
   llvm::Constant *GetAddrOfConstantCFString(const std::string& str);
   llvm::Function *getMemCpyFn();
   
+  
   void EmitFunction(const FunctionDecl *FD);
   void EmitGlobalVar(const FileVarDecl *D);
   void EmitGlobalVarDeclarator(const FileVarDecl *D);