mirror of
https://github.com/c64scene-ar/llvm-6502.git
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f57b845547
- Rename runOnMethod to runOnFunction
* Transform getAnalysisUsageInfo into getAnalysisUsage
- Method is now const
- It now takes one AnalysisUsage object to fill in instead of 3 vectors
to fill in
- Pass's now specify which other passes they _preserve_ not which ones
they modify (be conservative!)
- A pass can specify that it preserves all analyses (because it never
modifies the underlying program)
* s/Method/Function/g in other random places as well
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2333 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
//===- SymbolStripping.cpp - Strip symbols for functions and modules ------===//
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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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// * A function
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// * All functions in a module
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// * All symbols in a module (all function symbols + all module 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/SymbolStripping.h"
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#include "llvm/Module.h"
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#include "llvm/Function.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Pass.h"
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static bool StripSymbolTable(SymbolTable *SymTab) {
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if (SymTab == 0) return false; // No symbol table? No problem.
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bool RemovedSymbol = false;
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for (SymbolTable::iterator I = SymTab->begin(); I != SymTab->end(); ++I) {
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std::map<const std::string, Value *> &Plane = I->second;
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SymbolTable::type_iterator B;
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while ((B = Plane.begin()) != Plane.end()) { // Found nonempty type plane!
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Value *V = B->second;
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if (isa<Constant>(V) || isa<Type>(V))
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SymTab->type_remove(B);
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else
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V->setName("", SymTab); // Set name to "", removing from symbol table!
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RemovedSymbol = true;
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assert(Plane.begin() != B && "Symbol not removed from table!");
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}
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}
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return RemovedSymbol;
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}
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// DoSymbolStripping - Remove all symbolic information from a function
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//
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static bool doSymbolStripping(Function *F) {
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return StripSymbolTable(F->getSymbolTable());
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}
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// doStripGlobalSymbols - Remove all symbolic information from all functions
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// in a module, and all module level symbols. (function names, etc...)
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//
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static bool doStripGlobalSymbols(Module *M) {
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// Remove all symbols from functions in this module... and then strip all of
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// the symbols in this module...
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//
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return StripSymbolTable(M->getSymbolTable());
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}
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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 doSymbolStripping(F);
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}
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};
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struct FullSymbolStripping : public SymbolStripping {
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virtual bool doInitialization(Module *M) {
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return doStripGlobalSymbols(M);
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}
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};
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}
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Pass *createSymbolStrippingPass() {
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return new SymbolStripping();
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}
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Pass *createFullSymbolStrippingPass() {
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return new FullSymbolStripping();
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}
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