forked from OSchip/llvm-project
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
//===- SymbolStripping.cpp - Strip symbols for functions and modules ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements stripping symbols out of symbol tables.
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//
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// Specifically, this allows you to strip all of the symbols out of:
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// * All functions in a module
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// * All non-essential symbols in a module (all function symbols + all module
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// scope symbols)
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//
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// Notice that:
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// * This pass makes code much less readable, so it should only be used in
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// situations where the 'strip' utility would be used (such as reducing
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// code size, and making it harder to reverse engineer code).
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Module.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Pass.h"
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using namespace llvm;
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namespace {
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struct SymbolStripping : public FunctionPass {
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virtual bool runOnFunction(Function &F) {
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return F.getSymbolTable().strip();
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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RegisterOpt<SymbolStripping> X("strip", "Strip symbols from functions");
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struct FullSymbolStripping : public SymbolStripping {
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virtual bool doInitialization(Module &M) {
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return M.getSymbolTable().strip();
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}
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};
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RegisterOpt<FullSymbolStripping> Y("mstrip",
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"Strip symbols from module and functions");
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}
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Pass *llvm::createSymbolStrippingPass() {
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return new SymbolStripping();
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}
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Pass *llvm::createFullSymbolStrippingPass() {
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return new FullSymbolStripping();
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}
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