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Diffstat (limited to 'include/llvm/Analysis/MemoryBuiltins.h')
-rw-r--r-- | include/llvm/Analysis/MemoryBuiltins.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/llvm/Analysis/MemoryBuiltins.h b/include/llvm/Analysis/MemoryBuiltins.h new file mode 100644 index 0000000..5fd0bb0 --- /dev/null +++ b/include/llvm/Analysis/MemoryBuiltins.h @@ -0,0 +1,79 @@ +//===- llvm/Analysis/MemoryBuiltins.h- Calls to memory builtins -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This family of functions identifies calls to builtin functions that allocate +// or free memory. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_ANALYSIS_MEMORYBUILTINS_H +#define LLVM_ANALYSIS_MEMORYBUILTINS_H + +namespace llvm { +class CallInst; +class LLVMContext; +class PointerType; +class TargetData; +class Type; +class Value; + +//===----------------------------------------------------------------------===// +// malloc Call Utility Functions. +// + +/// isMalloc - Returns true if the value is either a malloc call or a bitcast of +/// the result of a malloc call +bool isMalloc(const Value* I); + +/// extractMallocCall - Returns the corresponding CallInst if the instruction +/// is a malloc call. Since CallInst::CreateMalloc() only creates calls, we +/// ignore InvokeInst here. +const CallInst* extractMallocCall(const Value* I); +CallInst* extractMallocCall(Value* I); + +/// extractMallocCallFromBitCast - Returns the corresponding CallInst if the +/// instruction is a bitcast of the result of a malloc call. +const CallInst* extractMallocCallFromBitCast(const Value* I); +CallInst* extractMallocCallFromBitCast(Value* I); + +/// isArrayMalloc - Returns the corresponding CallInst if the instruction +/// is a call to malloc whose array size can be determined and the array size +/// is not constant 1. Otherwise, return NULL. +CallInst* isArrayMalloc(Value* I, LLVMContext &Context, const TargetData* TD); +const CallInst* isArrayMalloc(const Value* I, LLVMContext &Context, + const TargetData* TD); + +/// getMallocType - Returns the PointerType resulting from the malloc call. +/// This PointerType is the result type of the call's only bitcast use. +/// If there is no unique bitcast use, then return NULL. +const PointerType* getMallocType(const CallInst* CI); + +/// getMallocAllocatedType - Returns the Type allocated by malloc call. This +/// Type is the result type of the call's only bitcast use. If there is no +/// unique bitcast use, then return NULL. +const Type* getMallocAllocatedType(const CallInst* CI); + +/// getMallocArraySize - Returns the array size of a malloc call. If the +/// argument passed to malloc is a multiple of the size of the malloced type, +/// then return that multiple. For non-array mallocs, the multiple is +/// constant 1. Otherwise, return NULL for mallocs whose array size cannot be +/// determined. +Value* getMallocArraySize(CallInst* CI, LLVMContext &Context, + const TargetData* TD); + +//===----------------------------------------------------------------------===// +// free Call Utility Functions. +// + +/// isFreeCall - Returns true if the the value is a call to the builtin free() +bool isFreeCall(const Value* I); + +} // End llvm namespace + +#endif |