| //===- BreakConstantGEPs.h - Change constant GEPs into GEP instructions --- --// |
| // |
| // The SAFECode Compiler |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This pass changes all GEP constant expressions into GEP instructions. This |
| // permits the rest of SAFECode to put run-time checks on them if necessary. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef BREAKCONSTANTGEPS_H |
| #define BREAKCONSTANTGEPS_H |
| |
| #include "llvm/Analysis/Dominators.h" |
| #include "llvm/Module.h" |
| #include "llvm/Pass.h" |
| |
| #include "safecode/SAFECode.h" |
| |
| using namespace llvm; |
| |
| NAMESPACE_SC_BEGIN |
| |
| // |
| // Pass: BreakConstantGEPs |
| // |
| // Description: |
| // This pass modifies a function so that it uses GEP instructions instead of |
| // GEP constant expressions. |
| // |
| struct BreakConstantGEPs : public FunctionPass { |
| private: |
| // Private methods |
| |
| // Private variables |
| |
| public: |
| static char ID; |
| BreakConstantGEPs() : FunctionPass((intptr_t)(&ID)) {} |
| const char *getPassName() const {return "Remove Constant GEP Expressions";} |
| virtual bool runOnFunction (Function & F); |
| virtual void getAnalysisUsage(AnalysisUsage &AU) const { |
| // This pass does not modify the control-flow graph of the function |
| AU.setPreservesCFG(); |
| } |
| }; |
| |
| NAMESPACE_SC_END |
| |
| #endif |