diff options
Diffstat (limited to 'include/llvm/Module.h')
| -rw-r--r-- | include/llvm/Module.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/include/llvm/Module.h b/include/llvm/Module.h index e5c157be95..85fdb868ed 100644 --- a/include/llvm/Module.h +++ b/include/llvm/Module.h @@ -166,15 +166,21 @@ public: /// @{ public: /// getOrInsertFunction - Look up the specified function in the module symbol - /// table. If it does not exist, add a prototype for the function and return - /// it. - Function *getOrInsertFunction(const std::string &Name, const FunctionType *T); + /// table. Four possibilities: + /// 1. If it does not exist, add a prototype for the function and return it. + /// 2. If it exists, and has internal linkage, the existing function is + /// renamed and a new one is inserted. + /// 3. Otherwise, if the existing function has the correct prototype, return + /// the existing function. + /// 4. Finally, the function exists but has the wrong prototype: return the + /// function with a constantexpr cast to the right prototype. + Constant *getOrInsertFunction(const std::string &Name, const FunctionType *T); /// getOrInsertFunction - Look up the specified function in the module symbol /// table. If it does not exist, add a prototype for the function and return /// it. This version of the method takes a null terminated list of function /// arguments, which makes it easier for clients to use. - Function *getOrInsertFunction(const std::string &Name, const Type *RetTy,...) + Constant *getOrInsertFunction(const std::string &Name, const Type *RetTy,...) END_WITH_NULL; /// getFunction - Look up the specified function in the module symbol table. |