diff options
Diffstat (limited to 'include/llvm/Transforms/Utils/SSAUpdater.h')
| -rw-r--r-- | include/llvm/Transforms/Utils/SSAUpdater.h | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/include/llvm/Transforms/Utils/SSAUpdater.h b/include/llvm/Transforms/Utils/SSAUpdater.h index 11b90d4..ad99c74 100644 --- a/include/llvm/Transforms/Utils/SSAUpdater.h +++ b/include/llvm/Transforms/Utils/SSAUpdater.h @@ -21,7 +21,7 @@ namespace llvm { class PHINode; template<typename T> class SmallVectorImpl; - + /// SSAUpdater - This class updates SSA form for a set of values defined in /// multiple blocks. This is used when code duplication or another unstructured /// transformation wants to rewrite a set of uses of one value with uses of a @@ -33,17 +33,17 @@ class SSAUpdater { /// eliminate them, and want the WeakVH to track this. //typedef DenseMap<BasicBlock*, TrackingVH<Value> > AvailableValsTy; void *AV; - + /// PrototypeValue is an arbitrary representative value, which we derive names /// and a type for PHI nodes. Value *PrototypeValue; - + /// IncomingPredInfo - We use this as scratch space when doing our recursive /// walk. This should only be used in GetValueInBlockInternal, normally it /// should be empty. //std::vector<std::pair<BasicBlock*, TrackingVH<Value> > > IncomingPredInfo; void *IPI; - + /// InsertedPHIs - If this is non-null, the SSAUpdater adds all PHI nodes that /// it creates to the vector. SmallVectorImpl<PHINode*> *InsertedPHIs; @@ -52,11 +52,11 @@ public: /// in with all PHI Nodes created by rewriting. SSAUpdater(SmallVectorImpl<PHINode*> *InsertedPHIs = 0); ~SSAUpdater(); - + /// Initialize - Reset this object to get ready for a new set of SSA /// updates. ProtoValue is the value used to name PHI nodes. void Initialize(Value *ProtoValue); - + /// AddAvailableValue - Indicate that a rewritten value is available at the /// end of the specified block with the specified value. void AddAvailableValue(BasicBlock *BB, Value *V); @@ -64,11 +64,11 @@ public: /// HasValueForBlock - Return true if the SSAUpdater already has a value for /// the specified block. bool HasValueForBlock(BasicBlock *BB) const; - + /// GetValueAtEndOfBlock - Construct SSA form, materializing a value that is /// live at the end of the specified block. Value *GetValueAtEndOfBlock(BasicBlock *BB); - + /// GetValueInMiddleOfBlock - Construct SSA form, materializing a value that /// is live in the middle of the specified block. /// @@ -89,14 +89,14 @@ public: /// merge the appropriate values, and this value isn't live out of the block. /// Value *GetValueInMiddleOfBlock(BasicBlock *BB); - + /// RewriteUse - Rewrite a use of the symbolic value. This handles PHI nodes, /// which use their value in the corresponding predecessor. Note that this /// will not work if the use is supposed to be rewritten to a value defined in /// the same block as the use, but above it. Any 'AddAvailableValue's added /// for the use's block will be considered to be below it. void RewriteUse(Use &U); - + private: Value *GetValueAtEndOfBlockInternal(BasicBlock *BB); void operator=(const SSAUpdater&); // DO NOT IMPLEMENT |
