Be sure to never create two functions with the same name, instead arrange to

reuse the prior one.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66408 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 13 deletions

diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index c3a84af0c5..039579ffc5 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -312,14 +312,17 @@ private:
 
   void EmitGlobalDefinition(const ValueDecl *D);
 
-  /// EmitForwardFunctionDefinition - Create a new function for the
-  /// given decl and set attributes as appropriate.
+  /// EmitForwardFunctionDefinition - Create a new function for the given decl
+  /// and set attributes as appropriate if ReplaceExisting is true, or if the
+  /// same named declaration doesn't already exist in the module table,
+  /// otherwise return the existing function from the module table.
   ///
-  /// \arg Ty - If non-null the LLVM function type to use for the
-  /// decl; it is the callers responsibility to make sure this is
-  /// compatible with the correct type.
+  /// \arg Ty - If non-null the LLVM function type to use for the decl; it is
+  /// the callers responsibility to make sure this is compatible with the
+  /// correct type.
   llvm::GlobalValue *EmitForwardFunctionDefinition(const FunctionDecl *D,
-                                                   const llvm::Type *Ty);
+                                                   const llvm::Type *Ty,
+                                                   bool ReplaceExisting=false);
 
   void EmitGlobalFunctionDefinition(const FunctionDecl *D);
   void EmitGlobalVarDefinition(const VarDecl *D);
@@ -337,19 +340,19 @@ private:
   void EmitAliases(void);
   void EmitAnnotations(void);
 
-  /// EmitDeferred - Emit any needed decls for which code generation
-  /// was deferred.
+  /// EmitDeferred - Emit any needed decls for which code generation was
+  /// deferred.
   void EmitDeferred(void);
 
-  /// EmitLLVMUsed - Emit the llvm.used metadata used to force
-  /// references to global which may otherwise be optimized out.
+  /// EmitLLVMUsed - Emit the llvm.used metadata used to force references to
+  /// global which may otherwise be optimized out.
   void EmitLLVMUsed(void);
 
   void BindRuntimeGlobals();
 
-  /// MayDeferGeneration - Determine if the given decl can be emitted
-  /// lazily; this is only relevant for definitions. The given decl
-  /// must be either a function or var decl.
+  /// MayDeferGeneration - Determine if the given decl can be emitted lazily;
+  /// this is only relevant for definitions. The given decl must be either a
+  /// function or var decl.
   bool MayDeferGeneration(const ValueDecl *D);
 };
 }  // end namespace CodeGen