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LLVM
4.0.0
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Evaluate the size and offset of an object pointed to by a Value* statically. More...
#include <MemoryBuiltins.h>
Static Public Member Functions | |
| static bool | knownSize (const SizeOffsetType &SizeOffset) |
| static bool | knownOffset (const SizeOffsetType &SizeOffset) |
| static bool | bothKnown (const SizeOffsetType &SizeOffset) |
Evaluate the size and offset of an object pointed to by a Value* statically.
Fails if size or offset are not known at compile time.
Definition at line 158 of file MemoryBuiltins.h.
| ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor | ( | const DataLayout & | DL, |
| const TargetLibraryInfo * | TLI, | ||
| LLVMContext & | Context, | ||
| bool | RoundToAlign = false, |
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| ObjSizeMode | Mode = ObjSizeMode::Exact |
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| ) |
Definition at line 451 of file MemoryBuiltins.cpp.
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inlinestatic |
Definition at line 190 of file MemoryBuiltins.h.
References knownOffset(), and knownSize().
Referenced by visitGEPOperator(), and visitSelectInst().
| SizeOffsetType ObjectSizeOffsetVisitor::compute | ( | Value * | V | ) |
Definition at line 461 of file MemoryBuiltins.cpp.
References A, llvm::dbgs(), DEBUG, GEP, llvm::APInt::getNullValue(), llvm::DataLayout::getPointerTypeSizeInBits(), llvm::Value::getType(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), P, llvm::Value::stripPointerCasts(), llvm::InstVisitor< ObjectSizeOffsetVisitor, SizeOffsetType >::visit(), visitArgument(), visitConstantPointerNull(), visitGEPOperator(), visitGlobalAlias(), visitGlobalVariable(), and visitUndefValue().
Referenced by visitGEPOperator(), visitGlobalAlias(), and visitSelectInst().
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inlinestatic |
Definition at line 186 of file MemoryBuiltins.h.
Referenced by bothKnown().
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inlinestatic |
Definition at line 182 of file MemoryBuiltins.h.
Referenced by bothKnown().
| SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst | ( | AllocaInst & | I | ) |
Definition at line 498 of file MemoryBuiltins.cpp.
References C, llvm::AllocaInst::getAlignment(), llvm::AllocaInst::getAllocatedType(), llvm::AllocaInst::getArraySize(), llvm::DataLayout::getTypeAllocSize(), llvm::AllocaInst::isArrayAllocation(), and llvm::Type::isSized().
| SizeOffsetType ObjectSizeOffsetVisitor::visitArgument | ( | Argument & | A | ) |
Definition at line 514 of file MemoryBuiltins.cpp.
References llvm::PointerType::getElementType(), llvm::Argument::getParamAlignment(), llvm::Value::getType(), llvm::DataLayout::getTypeAllocSize(), and llvm::Argument::hasByValOrInAllocaAttr().
Referenced by compute().
| SizeOffsetType ObjectSizeOffsetVisitor::visitCallSite | ( | CallSite | CS | ) |
Definition at line 525 of file MemoryBuiltins.cpp.
References AllocFnsTy::AllocTy, llvm::dyn_cast(), AllocFnsTy::FstParam, getAllocationSize(), llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::getArgument(), llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::getInstruction(), llvm::GetStringLength(), llvm::ConstantInt::getValue(), I, AllocFnsTy::SndParam, StrDupLike, llvm::APInt::ugt(), llvm::APInt::umul_ov(), and llvm::APInt::zextOrSelf().
| SizeOffsetType ObjectSizeOffsetVisitor::visitConstantPointerNull | ( | ConstantPointerNull & | ) |
Definition at line 599 of file MemoryBuiltins.cpp.
Referenced by compute().
| SizeOffsetType ObjectSizeOffsetVisitor::visitExtractElementInst | ( | ExtractElementInst & | I | ) |
Definition at line 604 of file MemoryBuiltins.cpp.
| SizeOffsetType ObjectSizeOffsetVisitor::visitExtractValueInst | ( | ExtractValueInst & | I | ) |
Definition at line 609 of file MemoryBuiltins.cpp.
| SizeOffsetType ObjectSizeOffsetVisitor::visitGEPOperator | ( | GEPOperator & | GEP | ) |
Definition at line 614 of file MemoryBuiltins.cpp.
References llvm::GEPOperator::accumulateConstantOffset(), bothKnown(), compute(), llvm::GEPOperator::getPointerOperand(), and Offset.
Referenced by compute().
| SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalAlias | ( | GlobalAlias & | GA | ) |
Definition at line 623 of file MemoryBuiltins.cpp.
References compute(), llvm::GlobalAlias::getAliasee(), and llvm::GlobalValue::isInterposable().
Referenced by compute().
| SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalVariable | ( | GlobalVariable & | GV | ) |
Definition at line 629 of file MemoryBuiltins.cpp.
References llvm::GlobalObject::getAlignment(), llvm::PointerType::getElementType(), llvm::GlobalValue::getType(), llvm::DataLayout::getTypeAllocSize(), and llvm::GlobalVariable::hasDefinitiveInitializer().
Referenced by compute().
| SizeOffsetType ObjectSizeOffsetVisitor::visitInstruction | ( | Instruction & | I | ) |
Definition at line 684 of file MemoryBuiltins.cpp.
References llvm::dbgs(), and DEBUG.
| SizeOffsetType ObjectSizeOffsetVisitor::visitIntToPtrInst | ( | IntToPtrInst & | ) |
Definition at line 637 of file MemoryBuiltins.cpp.
| SizeOffsetType ObjectSizeOffsetVisitor::visitLoadInst | ( | LoadInst & | I | ) |
Definition at line 642 of file MemoryBuiltins.cpp.
| SizeOffsetType ObjectSizeOffsetVisitor::visitPHINode | ( | PHINode & | ) |
Definition at line 647 of file MemoryBuiltins.cpp.
| SizeOffsetType ObjectSizeOffsetVisitor::visitSelectInst | ( | SelectInst & | I | ) |
Definition at line 652 of file MemoryBuiltins.cpp.
References bothKnown(), compute(), llvm::SelectInst::getFalseValue(), getSizeWithOverflow(), llvm::SelectInst::getTrueValue(), llvm::Max, llvm::Min, llvm::APInt::sgt(), and llvm::APInt::slt().
| SizeOffsetType ObjectSizeOffsetVisitor::visitUndefValue | ( | UndefValue & | ) |
Definition at line 680 of file MemoryBuiltins.cpp.
Referenced by compute().
1.8.6