1 //===- SymbolStripping.cpp - Strip symbols for functions and modules ------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements stripping symbols out of symbol tables.
12 // Specifically, this allows you to strip all of the symbols out of:
13 // * All functions in a module
14 // * All non-essential symbols in a module (all function symbols + all module
18 // * This pass makes code much less readable, so it should only be used in
19 // situations where the 'strip' utility would be used (such as reducing
20 // code size, and making it harder to reverse engineer code).
22 //===----------------------------------------------------------------------===//
24 #include "llvm/Transforms/Scalar.h"
25 #include "llvm/Module.h"
26 #include "llvm/SymbolTable.h"
27 #include "llvm/Pass.h"
31 struct SymbolStripping : public FunctionPass {
32 virtual bool runOnFunction(Function &F) {
33 return F.getSymbolTable().strip();
35 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
39 RegisterOpt<SymbolStripping> X("strip", "Strip symbols from functions");
41 struct FullSymbolStripping : public SymbolStripping {
42 virtual bool doInitialization(Module &M) {
43 return M.getSymbolTable().strip();
46 RegisterOpt<FullSymbolStripping> Y("mstrip",
47 "Strip symbols from module and functions");
50 Pass *llvm::createSymbolStrippingPass() {
51 return new SymbolStripping();
54 Pass *llvm::createFullSymbolStrippingPass() {
55 return new FullSymbolStripping();