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90f48e7c91
ArraySize * ElementSize ElementSize * ArraySize ArraySize << log2(ElementSize) ElementSize << log2(ArraySize) Refactor isArrayMallocHelper and delete isSafeToGetMallocArraySize, so that there is only 1 copy of the malloc array determining logic. Update users of getMallocArraySize() to not bother calling isArrayMalloc() as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85421 91177308-0d34-0410-b5e6-96231b3b80d8
80 lines
3.1 KiB
C++
80 lines
3.1 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 LLVMContext;
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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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CallInst* isArrayMalloc(Value* I, LLVMContext &Context, const TargetData* TD);
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const CallInst* isArrayMalloc(const Value* I, LLVMContext &Context,
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const TargetData* TD);
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/// getMallocType - Returns the PointerType resulting from the malloc call.
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/// This PointerType is the result type of the call's only bitcast use.
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/// If there is no unique bitcast use, then return NULL.
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const PointerType* getMallocType(const CallInst* CI);
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/// getMallocAllocatedType - Returns the Type allocated by malloc call. This
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/// Type is the result type of the call's only bitcast use. If there is no
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/// unique bitcast use, then 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, LLVMContext &Context,
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const TargetData* TD);
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//===----------------------------------------------------------------------===//
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// free Call Utility Functions.
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//
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/// isFreeCall - Returns true if the the value is a call to the builtin free()
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bool isFreeCall(const Value* I);
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} // End llvm namespace
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#endif
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