1 //===-- Internalize.cpp - Mark functions internal -------------------------===//
3 // This pass loops over all of the functions in the input module, looking for a
4 // main function. If a main function is found, all other functions are marked
7 //===----------------------------------------------------------------------===//
9 #include "llvm/Transforms/IPO/Internalize.h"
10 #include "llvm/Pass.h"
11 #include "llvm/Module.h"
12 #include "llvm/Function.h"
14 class InternalizePass : public Pass {
15 virtual bool run(Module *M) {
16 bool FoundMain = false; // Look for a function named main...
17 for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
18 if ((*I)->getName() == "main" && !(*I)->isExternal()) {
23 if (!FoundMain) return false; // No main found, must be a library...
27 // Found a main function, mark all functions not named main as internal.
28 for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
29 if ((*I)->getName() != "main" && // Leave the main function external
30 !(*I)->isExternal()) // Function must be defined here
31 (*I)->setInternalLinkage(Changed = true);
37 Pass *createInternalizePass() {
38 return new InternalizePass();