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the ChangeAllocations.h header file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1522 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
//===- llvm/Transforms/ChangeAllocations.h -----------------------*- C++ -*--=//
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//
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// This file defines two passes that convert malloc and free instructions to
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// calls to and from %malloc & %free function calls. The LowerAllocations
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// transformation is a target dependant tranformation because it depends on the
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// size of data types and alignment constraints.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_CHANGEALLOCATIONS_H
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#define LLVM_TRANSFORMS_CHANGEALLOCATIONS_H
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#include "llvm/Pass.h"
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class TargetData;
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// LowerAllocations - Turn malloc and free instructions into %malloc and %free
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// calls.
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//
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class LowerAllocations : public BasicBlockPass {
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Method *MallocMeth; // Methods in the module we are processing
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Method *FreeMeth; // Initialized by doInitialization
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const TargetData &DataLayout;
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public:
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inline LowerAllocations(const TargetData &TD) : DataLayout(TD) {
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MallocMeth = FreeMeth = 0;
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}
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// doPassInitialization - For the lower allocations pass, this ensures that a
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// module contains a declaration for a malloc and a free function.
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//
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bool doInitialization(Module *M);
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// runOnBasicBlock - This method does the actual work of converting
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// instructions over, assuming that the pass has already been initialized.
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//
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bool runOnBasicBlock(BasicBlock *BB);
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};
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// RaiseAllocations - Turn %malloc and %free calls into the appropriate
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// instruction.
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//
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class RaiseAllocations : public BasicBlockPass {
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Method *MallocMeth; // Methods in the module we are processing
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Method *FreeMeth; // Initialized by doPassInitializationVirt
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public:
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inline RaiseAllocations() : MallocMeth(0), FreeMeth(0) {}
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// doPassInitialization - For the raise allocations pass, this finds a
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// declaration for malloc and free if they exist.
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//
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bool doInitialization(Module *M);
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// runOnBasicBlock - This method does the actual work of converting
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// instructions over, assuming that the pass has already been initialized.
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//
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bool runOnBasicBlock(BasicBlock *BB);
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};
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#endif
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