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81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
//===- llvm/Analysis/MemoryBuiltins.h- Calls to memory builtins -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This family of functions identifies calls to builtin functions that allocate
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// or free memory.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_MEMORYBUILTINS_H
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#define LLVM_ANALYSIS_MEMORYBUILTINS_H
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namespace llvm {
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class CallInst;
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class PointerType;
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class TargetData;
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class Type;
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class Value;
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//===----------------------------------------------------------------------===//
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// malloc Call Utility Functions.
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//
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/// isMalloc - Returns true if the value is either a malloc call or a bitcast of
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/// the result of a malloc call
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bool isMalloc(const Value *I);
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/// extractMallocCall - Returns the corresponding CallInst if the instruction
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/// is a malloc call. Since CallInst::CreateMalloc() only creates calls, we
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/// ignore InvokeInst here.
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const CallInst *extractMallocCall(const Value *I);
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CallInst *extractMallocCall(Value *I);
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/// extractMallocCallFromBitCast - Returns the corresponding CallInst if the
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/// instruction is a bitcast of the result of a malloc call.
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const CallInst *extractMallocCallFromBitCast(const Value *I);
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CallInst *extractMallocCallFromBitCast(Value *I);
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/// isArrayMalloc - Returns the corresponding CallInst if the instruction
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/// is a call to malloc whose array size can be determined and the array size
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/// is not constant 1. Otherwise, return NULL.
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const CallInst *isArrayMalloc(const Value *I, const TargetData *TD);
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/// getMallocType - Returns the PointerType resulting from the malloc call.
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/// The PointerType depends on the number of bitcast uses of the malloc call:
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/// 0: PointerType is the malloc calls' return type.
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/// 1: PointerType is the bitcast's result type.
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/// >1: Unique PointerType cannot be determined, return NULL.
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const PointerType *getMallocType(const CallInst *CI);
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/// getMallocAllocatedType - Returns the Type allocated by malloc call.
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/// The Type depends on the number of bitcast uses of the malloc call:
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/// 0: PointerType is the malloc calls' return type.
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/// 1: PointerType is the bitcast's result type.
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/// >1: Unique PointerType cannot be determined, return NULL.
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const Type *getMallocAllocatedType(const CallInst *CI);
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/// getMallocArraySize - Returns the array size of a malloc call. If the
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/// argument passed to malloc is a multiple of the size of the malloced type,
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/// then return that multiple. For non-array mallocs, the multiple is
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/// constant 1. Otherwise, return NULL for mallocs whose array size cannot be
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/// determined.
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Value *getMallocArraySize(CallInst *CI, const TargetData *TD,
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bool LookThroughSExt = false);
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//===----------------------------------------------------------------------===//
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// free Call Utility Functions.
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//
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/// isFreeCall - Returns non-null if the value is a call to the builtin free()
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const CallInst *isFreeCall(const Value *I);
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} // End llvm namespace
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#endif
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