Implementation of non-dependent functionality for PtrUseVisitor.
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#include <PtrUseVisitor.h>
Classes | |
| class | PtrInfo |
| This class provides information about the result of a visit. More... | |
| struct | UseToVisit |
| A struct of the data needed to visit a particular use. More... | |
Protected Member Functions | |
| PtrUseVisitorBase (const DataLayout &DL) | |
| void | enqueueUsers (Instruction &I) |
| Enqueue the users of this instruction in the visit worklist. | |
| bool | adjustOffsetForGEP (GetElementPtrInst &GEPI) |
| Walk the operands of a GEP and adjust the offset as appropriate. | |
Protected Attributes | |
| const DataLayout & | DL |
Visitation infrastructure | |
| PtrInfo | PI |
| The info collected about the pointer being visited thus far. | |
| SmallVector< UseToVisit, 8 > | Worklist |
| The worklist of to-visit uses. | |
| SmallPtrSet< Use *, 8 > | VisitedUses |
| A set of visited uses to break cycles in unreachable code. | |
Per-visit state | |
This state is reset for each instruction visited. | |
| Use * | U |
| The use currently being visited. | |
| bool | IsOffsetKnown |
| True if we have a known constant offset for the use currently being visited. | |
| APInt | Offset |
| The constant offset of the use if that is known. | |
Detailed Description
Implementation of non-dependent functionality for PtrUseVisitor.
See PtrUseVisitor for the public interface and detailed comments about usage. This class is just a helper base class which is not templated and contains all common code to be shared between different instantiations of PtrUseVisitor.
Definition at line 42 of file PtrUseVisitor.h.
Constructor & Destructor Documentation
| llvm::detail::PtrUseVisitorBase::PtrUseVisitorBase | ( | const DataLayout & | DL | ) | [inline, protected] |
Note that the constructor is protected because this class must be a base class, we can't create instances directly of this class.
Definition at line 151 of file PtrUseVisitor.h.
Member Function Documentation
| bool detail::PtrUseVisitorBase::adjustOffsetForGEP | ( | GetElementPtrInst & | GEPI | ) | [protected] |
Walk the operands of a GEP and adjust the offset as appropriate.
This routine does the heavy lifting of the pointer walk by computing offsets and looking through GEPs.
Definition at line 30 of file PtrUseVisitor.cpp.
References llvm::GetElementPtrInst::accumulateConstantOffset().
Referenced by llvm::PtrUseVisitor< SliceBuilder >::visitGetElementPtrInst().
| void detail::PtrUseVisitorBase::enqueueUsers | ( | Instruction & | I | ) | [protected] |
Enqueue the users of this instruction in the visit worklist.
This will visit the users with the same offset of the current visit (including an unknown offset if that is the current state).
Definition at line 18 of file PtrUseVisitor.cpp.
References llvm::SmallPtrSetImpl< PtrType >::insert(), IsOffsetKnown, Offset, llvm::SmallVectorTemplateBase< T, isPodLike >::push_back(), U, llvm::Value::uses(), VisitedUses, and Worklist.
Referenced by llvm::PtrUseVisitor< SliceBuilder >::visitBitCastInst(), llvm::PtrUseVisitor< SliceBuilder >::visitGetElementPtrInst(), and llvm::PtrUseVisitor< SliceBuilder >::visitPtr().
Member Data Documentation
const DataLayout& llvm::detail::PtrUseVisitorBase::DL [protected] |
Definition at line 105 of file PtrUseVisitor.h.
Referenced by llvm::PtrUseVisitor< SliceBuilder >::visitPtr().
bool llvm::detail::PtrUseVisitorBase::IsOffsetKnown [protected] |
True if we have a known constant offset for the use currently being visited.
Definition at line 141 of file PtrUseVisitor.h.
Referenced by enqueueUsers(), llvm::PtrUseVisitor< SliceBuilder >::visitGetElementPtrInst(), and llvm::PtrUseVisitor< SliceBuilder >::visitPtr().
APInt llvm::detail::PtrUseVisitorBase::Offset [protected] |
The constant offset of the use if that is known.
Definition at line 144 of file PtrUseVisitor.h.
Referenced by enqueueUsers(), llvm::PtrUseVisitor< SliceBuilder >::visitGetElementPtrInst(), and llvm::PtrUseVisitor< SliceBuilder >::visitPtr().
PtrInfo llvm::detail::PtrUseVisitorBase::PI [protected] |
The info collected about the pointer being visited thus far.
Definition at line 111 of file PtrUseVisitor.h.
Referenced by llvm::PtrUseVisitor< SliceBuilder >::visitCallSite(), llvm::PtrUseVisitor< SliceBuilder >::visitPtr(), llvm::PtrUseVisitor< SliceBuilder >::visitPtrToIntInst(), and llvm::PtrUseVisitor< SliceBuilder >::visitStoreInst().
Use* llvm::detail::PtrUseVisitorBase::U [protected] |
The use currently being visited.
Definition at line 137 of file PtrUseVisitor.h.
Referenced by enqueueUsers(), llvm::PtrUseVisitor< SliceBuilder >::visitPtr(), and llvm::PtrUseVisitor< SliceBuilder >::visitStoreInst().
SmallPtrSet<Use *, 8> llvm::detail::PtrUseVisitorBase::VisitedUses [protected] |
A set of visited uses to break cycles in unreachable code.
Definition at line 127 of file PtrUseVisitor.h.
Referenced by enqueueUsers().
SmallVector<UseToVisit, 8> llvm::detail::PtrUseVisitorBase::Worklist [protected] |
The worklist of to-visit uses.
Definition at line 124 of file PtrUseVisitor.h.
Referenced by enqueueUsers(), and llvm::PtrUseVisitor< SliceBuilder >::visitPtr().
The documentation for this class was generated from the following files:
1.7.6.1