From: Chris Lattner <sabre@nondot.org>
Date: Sun, 2 Dec 2007 05:56:05 +0000 (+0000)
Subject: merge functions with multiple function decls if they have the same name.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=028380e5a61725c996a62554495d5c91d6eba415;p=clang

merge functions with multiple function decls if they have the same name.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44505 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/CodeGen/CodeGenModule.cpp b/CodeGen/CodeGenModule.cpp
index 54009b0e42..b76d5e35ee 100644
--- a/CodeGen/CodeGenModule.cpp
+++ b/CodeGen/CodeGenModule.cpp
@@ -40,6 +40,13 @@ llvm::Constant *CodeGenModule::GetAddrOfGlobalDecl(const ValueDecl *D) {
   const llvm::Type *Ty = getTypes().ConvertType(ASTTy);
   if (isa<FunctionDecl>(D)) {
     const llvm::FunctionType *FTy = cast<llvm::FunctionType>(Ty);
+    
+    // Check to see if the function already exists.
+    if (llvm::Function *F = getModule().getFunction(D->getName())) {
+      // If so, make sure it is the correct type.
+      return llvm::ConstantExpr::getBitCast(F, llvm::PointerType::get(FTy));
+    }
+    
     // FIXME: param attributes for sext/zext etc.
     return Entry = new llvm::Function(FTy, llvm::Function::ExternalLinkage,
                                       D->getName(), &getModule());