From af23f69aa6247e6bd20a66b2e16babb91f192535 Mon Sep 17 00:00:00 2001
From: Anders Carlsson <andersca@mac.com>
Date: Sat, 18 Apr 2009 20:20:22 +0000
Subject: [PATCH] Make CodeGenFunction::EmitCallArgs a template function that
 takes a generic "Type Info" parameter. The type info parameter knows how to
 iterate over its arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69469 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGCall.cpp        | 32 -------------------------
 lib/CodeGen/CodeGenFunction.h | 44 ++++++++++++++++++++++++++++++-----
 2 files changed, 38 insertions(+), 38 deletions(-)

diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index e6474cb9ee..d17ab13446 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -1935,38 +1935,6 @@ RValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) {
   return EmitAnyExprToTemp(E);
 }
 
-void CodeGenFunction::EmitCallArgs(CallArgList& Args, 
-                                   const FunctionProtoType *FPT,
-                                   CallExpr::const_arg_iterator ArgBeg,
-                                   CallExpr::const_arg_iterator ArgEnd) {
-  CallExpr::const_arg_iterator Arg = ArgBeg;
-  
-  // First, use the function argument types.
-  if (FPT) {
-    for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(),
-         E = FPT->arg_type_end(); I != E; ++I, ++Arg) {
-      assert(getContext().getCanonicalType(I->getNonReferenceType()).
-             getTypePtr() == 
-             getContext().getCanonicalType(Arg->getType()).getTypePtr() && 
-             "type mismatch in call argument!");
-      
-      QualType ArgType = *I;
-      Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType), 
-                                    ArgType));
-    }
-    
-    assert(Arg == ArgEnd || FPT->isVariadic() && 
-           "Extra arguments in non-variadic function!");
-  }
-  
-  // If we still have any arguments, emit them using the type of the argument.
-  for (; Arg != ArgEnd; ++Arg) {
-    QualType ArgType = Arg->getType();
-    Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
-                                  ArgType));
-  }
-}
-
 RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
                                  llvm::Value *Callee, 
                                  const CallArgList &CallArgs,
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index d511da3f7f..45f96d33b7 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -811,14 +811,46 @@ private:
   RValue EmitCallArg(const Expr *E, QualType ArgType);
   
   /// EmitCallArgs - Emit call arguments for a function.
-  /// FIXME: It should be possible to generalize this and pass a generic
-  /// "argument type container" type instead of the FunctionProtoType. This way
-  /// it can work on Objective-C methods as well.
-  void EmitCallArgs(CallArgList& args, const FunctionProtoType *FPT,
+  /// The CallArgTypeInfo parameter is used for iterating over the known 
+  /// argument types of the function being called.
+  template<typename T>
+  void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo,
                     CallExpr::const_arg_iterator ArgBeg,
-                    CallExpr::const_arg_iterator ArgEnd);
-
+                    CallExpr::const_arg_iterator ArgEnd) {
+      CallExpr::const_arg_iterator Arg = ArgBeg;
+
+    // First, use the argument types that the type info knows about
+    if (CallArgTypeInfo) {
+      for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(),
+           E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) {
+        QualType ArgType = *I;
+
+        assert(getContext().getCanonicalType(ArgType.getNonReferenceType()).
+               getTypePtr() == 
+               getContext().getCanonicalType(Arg->getType()).getTypePtr() && 
+               "type mismatch in call argument!");
+        
+        Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType), 
+                                      ArgType));
+      }
+      
+      // Either we've emitted all the call args, or we have a call to a 
+      // variadic function.
+      assert(Arg == ArgEnd || CallArgTypeInfo->isVariadic() && 
+             "Extra arguments in non-variadic function!");
+      
+    }
+    
+    // If we still have any arguments, emit them using the type of the argument.
+    for (; Arg != ArgEnd; ++Arg) {
+      QualType ArgType = Arg->getType();
+      Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
+                                    ArgType));
+    }
+  }
 };
+  
+
 }  // end namespace CodeGen
 }  // end namespace clang
 
-- 
2.40.0